Implementing the probe beam deflection technique for acoustic sensing in photoacoustic and ultrasound imaging
|
|
- Ferdinand Melton
- 5 years ago
- Views:
Transcription
1 Implementing the probe beam deflection technique for acoustic sensing in photoacoustic and ultrasound imaging Ronald A. Barnes Jr. The University of Texas at San Antonio This work is a collaboration between The University of Texas at San Antonio and The University of Texas Health Science Center.
2 Outline Introduction Background Modeling (MATLAB) Acoustic Wave Propagation Ray Tracing Simulation (MATLAB) Optimum Sensor Topology Optimum Beam Topology Quadrant Photodiode Simulation Acoustic Wave Directionality Measurement Sensor Frequency Response Visualization (ParaView and MATLAB) Conclusion
3 Introduction What is Photoacoustic Tomography? Photoacoustic Tomography (PAT) is accomplished by measuring the propagating acoustic energy radiated from a sample of tissue whose thermal expansion is invoked by a pulse laser. An image of the tissue composition is reconstructed based on the measurement of the of this acoustic energy. What is the Probe Beam Deflection Technique? The Probe Beam Deflection Technique (PBDT) is sensing topology that uses probe beam lasers and there deflection and refraction to measure the properties of the propagating acoustic wave, through the implementation of a Quadrant Photodiode (QPD). Why is Modeling and Simulation important for this project? To develop an efficient algorithm for reconstruction of a tissue composition image, one must understand the interaction between probe beam and propagating acoustic wave front. A ray tracing simulation in combination with an acoustic wave simulation will allow for the prediction of beam deflection or refraction for various experimental topologies and implementations.
4 Background (PAT) Light enters a scattering medium (Ex. Tissue Phantom) where a portion of the energy is absorbed by the tissue in the form of heat, this produces thermal expansion. If the temperature increase inside the phantom occurs at a faster rate then the thermal relaxation time of the tissue, an acoustic wave will propagate as a result of the photo-acoustic effect. This acoustic wave produced is a wideband ultrasonic transmission and to date is measured with piezoelectric transducers.
5 PAT Applications Melanoma detection Photoacoustic tomography of gene expression. Doppler photoacoustic tomography for flow measurement. Photoacoustic and thermoacoustic tomography of the brain Low-background thermoacoustic molecular imaging. [2]. Prospects of photoacoustic tomography, Lihong V. Wang
6 Photoacoustic vs. Other Contrast Methods Contrast Method Bandwidth (Hz) Primary Contrast Penetration Depth (mm) Axial Resolution (um) Lateral Resolution (um) Photoacoustic microscopy 50 M Optical absorption Photoacoustic microscopy 5 M Optical absorption Confocal microscopy Fluorescence, scattering Two-photon microscopy Fluorescence Optical coherence tomography 50 T Optical scattering Scanning Laser Acoustic Microscopy 300 M Ultrasonic scattering Acoustic microscopy 50 M Ultrasonic scattering Ultrasonography 5 M Ultrasonic scattering [1] Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis.
7 Background (PBDT) PBDT is implemented by focusing probe beams through an enclosure filled with a propagation medium. As an acoustic wave travels through the medium the refractive index is changed relative to the pressure gradient produced by the wave. The probe beam deflects and refracts as it interacts with the refractive index profile along its beam path. The probe beam deflection technique offers various advantages when compared to transducers, these include: Wave front directionality measurement, passive sensing, and low implementation cost.
8 Development of a Model Step 1: Produce a model of acoustic wave propagation in homogeneous and heterogeneous mediums based on the 2 nd order PDE governing acoustic wave propagation. Step 2: Modify this model in such a way that all parameters are adjustable. This includes: Initial acoustic wave magnitude, propagation medium properties, acoustic wave frequency, etc. Step 3: Convert the pressure values in the four dimensional dataset (3 dim. for space and 1 for time) to refractive index using the lorentz-lorenz relation. Step 4: Develop a ray tracing simulation to trace a bundle of rays through the previously created dataset using the vector form of Snells law. This simulation should have adjustable parameters which include: initial ray origin (for all rays that make up beam), initial ray intensity, and initial ray direction.
9 Model Setup DAQ X Y PC PC Quadrant Photodiode Enclosure Filled With Distilled Water 1 2 FP 3 4 L3 n5 V5 n4 V4 n3 V3 FP Wave Front n2 V2 n1 V1 L1 L2 Probe Beam OPO Laser P FP
10 MATLAB Visualization
11 MATLAB Visualization
12 Method for Ray Trace Simulation (PBDT) The nature of Snells law allows the PBDT method to determine the propagation direction of the wavefront in relation to the probe beam. This is a distinct advantage over piezoelectrics whose measurement ability is limited to distance from transducer to acoustic Acoustic Wave Front (H) wave source. Acoustic Wave Front (L) V k 1 Tangent Plane n k n k Vk 1 Vk cos k cos k 1 n if k n k 1 n nk Vk 0 k 1 P r k 1 n k n k Vk 1 Vk cos k cos k 1 n if k n k 1 n nk Vk 0 k 1 k V k n k
13 Visual Example of Ray Trace
14 Probe Beam Orientations
15 Quadrant Photodiode Concept Y X ( A B) ( C D) A B C D ( A C) ( B D) A B C D tan y x
16 Beam Intersection on QPD Surface (Simulation)
17 MATLAB Visualization
18 MATLAB Visualization QPD Y SIGNAL QPD X SIGNAL
19 Experimental Implementation
20 Probe Beam Orientations (Experiment)
21 Experimental Results A B C
22 Future Work Define optimum beam and sensor topologies for experimental implementation of PBDT derived from simulation. Define the frequency response of PBDT and compare to the frequency response to commercially available transducers. Develop reconstruction algorithm based on integrating line detectors as proposed by G. Paltauf but with added angular information.
23 Acknowledgments NSF grant (HRD ), Drs. Demetris Kazakos and Richard Smith, project managers. PREM Grant # DMR
24 References André Conjusteau, Saher Maswadi, Sergey Ermilov, Hans-Peter Brecht, Norman Barsalou, Randolph D. Glickman and Alexander A. Oraevsky, "Detection of gold-nanorod targeted pathogens using optical and piezoelectric optoacoustic sensors: comparative study", Proc. SPIE 7177, 71771P (2009); doi: / B. E. Treeby and B. T. Cox, "A k-space Green's function solution for acoustic initial value problems in homogeneous media with power law absorption," J. Acoust. Soc. Am., vol. 129, no. 6, pp , B. E. Treeby, E. Z. Zhang, and B. T. Cox, "Photoacoustic tomography in absorbing acoustic media using time reversal," Inverse Prob., vol. 26, no. 11, p , B. E. Treeby and B. T. Cox, "Modeling power law absorption and dispersion for acoustic propagation using the fractional Laplacian," J. Acoust. Soc. Am., vol. 127, no. 5, pp , 2010 B. E. Treeby and B. T. Cox, "k-wave: MATLAB toolbox for the simulation and reconstruction of photoacoustic wave-fields," J. Biomed. Opt., vol. 15, no. 2, p , B. T. Cox and B. E. Treeby, "Artifact trapping during time reversal photoacoustic imaging for acoustically heterogeneous media," IEEE Trans. Med. Imaging, vol. 29, no. 2, pp , B. T. Cox, S. Kara, S. R. Arridge, and P. C. Beard, "k-space propagation models for acoustically heterogeneous media: Application to biomedical photoacoustics," J. Acoust. Soc. Am., vol. 121, no. 6, pp , 2007 B. T. Cox and P. C. Beard, "Fast calculation of pulsed photoacoustic fields in fluids using k-space methods," J. Acoust. Soc. Am., vol. 177, no. 6, pp , Wang, L. V., Ed.. Photoacoustic Imaging and Spectroscopy. Taylor & Francis, 2009.
25 Questions??
Effect of Sensor Directionality on Photoacoustic Imaging: A Study Using the k-wave Toolbox
Effect of Sensor Directionality on Photoacoustic Imaging: A Study Using the k-wave Toolbox B.T. Cox and B.E. Treeby Department of Medical Physics and Bioengineering, University College London, Gower Street,
More informationOrthogonal Fabry-Pérot sensor array system for minimal-artifact 3D photoacoustic tomography
Orthogonal Fabry-Pérot sensor array system for minimal-artifact 3D photoacoustic tomography Robert Ellwood, Edward Zhang, Paul Beard and Ben Cox Department of Medical Physics and Biomedical Engineering,
More informationAdvanced Image Reconstruction Methods for Photoacoustic Tomography
Advanced Image Reconstruction Methods for Photoacoustic Tomography Mark A. Anastasio, Kun Wang, and Robert Schoonover Department of Biomedical Engineering Washington University in St. Louis 1 Outline Photoacoustic/thermoacoustic
More informationThe use of acoustic reflectors to enlarge the effective area of planar sensor arrays
The use of acoustic reflectors to enlarge the effective area of planar sensor arrays R. Ellwood 1, E.Z. Zhang 1, P.C. Beard 1 & B.T. Cox 1 1 Department of Medical Physics and Bioengineering, University
More informationPhotoacoustic imaging with a multi-view Fabry-Pérot scanner
Photoacoustic imaging with a multi-view Fabry-Pérot scanner R. Ellwood 1, Felix Lucka 2, E.. hang 1, P.C. Beard 1, and B.T. Cox 1 1 Department of Medical Physics and Biomedical Engineering, University
More informationPH880 Topics in Physics
PH880 Topics in Physics Modern Optical Imaging (Fall 2010) KAIST PH880 11/10/2010 Overview of week 11 Monday: Digital Holographic Tomography Optical Coherence Tomography Wednesday: PhotoacousticTomography
More informationOutline. Introduction to photoacoustic computed tomography (PACT) Imaging models and iterative image reconstruction. Success with small animal imaging
Outline Advantages of PACT Photoacoustic Computed Tomography with Applications to Breast Imaging Mark A. Anastasio Department of Biomedical Engineering Washington University in St. Louis St. Louis, MO
More informationDevelopment and validation of a short-lag spatial coherence theory for photoacoustic imaging
Development and validation of a short-lag spatial coherence theory for photoacoustic imaging Michelle T. Graham 1 and Muyinatu A. Lediju Bell 1,2 1 Department of Electrical and Computer Engineering, Johns
More informationHIGH-PERFORMANCE TOMOGRAPHIC IMAGING AND APPLICATIONS
HIGH-PERFORMANCE TOMOGRAPHIC IMAGING AND APPLICATIONS Hua Lee and Yuan-Fang Wang Department of Electrical and Computer Engineering University of California, Santa Barbara ABSTRACT Tomographic imaging systems
More informationA fast marching method based back projection algorithm for photoacoustic tomography in heterogeneous media
A fast marching method based back projection algorithm for photoacoustic tomography in heterogeneous media 1 arxiv:1501.03869v2 [physics.med-ph] 20 Jan 2015 Tianren Wang and Yun Jing Abstract This paper
More informationHOLOGRAPHIC SCANNING LASER ACOUSTIC MICROSCOPY (HOLOSLAM): A NEW QNDE TOOL. A. C. Wey, and L. W. Kessler
HOLOGRAPHIC SCANNING LASER ACOUSTIC MICROSCOPY (HOLOSLAM): A NEW QNDE TOOL A. C. Wey, and L. W. Kessler Sonoscan, Inc. 530 E. Green Street Bensenville, Illinois INTRODUCTION Acoustic microscopy is the
More informationLight and tissue: 2. Two-photon, Optical Coherence Tomography, Photoacoustics
Light and tissue: 2 Two-photon, Optical Coherence Tomography, Photoacoustics Last lecture: Absorption and Scattering Last lecture: Mean free path Mean free path Transport mean free path Ntziachristos (2010)
More informationAcoustic Simulations in Transcranial MRgFUS: Prediction and Retrospective Analysis
Acoustic Simulations in Transcranial MRgFUS: Prediction and Retrospective Analysis URVI VYAS STANFORD UNIVE RSITY Outline Transcranial MRgFUS Clinical treatments and patient specific thermal responses
More informationPhysics 202, Lecture 23
Physics 202, Lecture 23 Today s Topics Lights and Laws of Geometric Optics Nature of Light Reflection and Refraction Law of Reflection Law of Refraction Index of Reflection, Snell s Law Total Internal
More informationCertificate in Clinician Performed Ultrasound (CCPU)
Certificate in Clinician Performed Ultrasound (CCPU) Syllabus Physics Tutorial Physics Tutorial Purpose: Training: Assessments: This unit is designed to cover the theoretical and practical curriculum for
More informationS. J. Wormley, B. P. Newberry, M. S. Hughes D. K. Hsu, and D. O. Thompson Center for NDE Iowa State University Ames, Iowa 50011
APPLICATION OF GAUSS-HERMITE BEAM MODEL TO THE DESIGN OF ULTRASONIC PROBES S. J. Wormley, B. P. Newberry, M. S. Hughes D. K. Hsu, and D. O. Thompson Center for NDE Iowa State University Ames, Iowa 50011
More informationExact Frequency-Domain Reconstruction for Thermoacoustic Tomography I: Planar Geometry
IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 21, NO. 7, JULY 2002 823 Exact Frequency-Domain Reconstruction for Thermoacoustic Tomography I: Planar Geometry Yuan Xu, Dazi Feng, and Lihong V. Wang* Abstract
More informationLight. Electromagnetic wave with wave-like nature Refraction Interference Diffraction
Light Electromagnetic wave with wave-like nature Refraction Interference Diffraction Light Electromagnetic wave with wave-like nature Refraction Interference Diffraction Photons with particle-like nature
More informationModeling photon propagation in biological tissues using a generalized Delta-Eddington phase function
Modeling photon propagation in biological tissues using a generalized Delta-Eddington phase function W. Cong, 1 H. Shen, 1 A. Cong, 1 Y. Wang, 2 and G. Wang 1 1 Biomedical Imaging Division, School of Biomedical
More informationUniversity of Lübeck, Medical Laser Center Lübeck GmbH Optical Coherence Tomography
University of Lübeck, Medical Laser Center Lübeck GmbH Optical Coherence Tomography. Theory Dr. Gereon Hüttmann / 009 What is OCT? ( for the MD ) Lichtquelle Probe Detektor Display OCT is Ultrasound with
More informationCHAPTER 2 MEDICAL IMAGING WITH NON-IONIZING RADIATION
CHAPTER 2 MEDICAL IMAGING WITH NON-IONIZING RADIATION 1 Ultrasound Imaging 1.1 Ultrasound Production and Detection Ultrasound is frequency vibration. To produce and detect ultrasound, we use crystals which
More informationOptical Sectioning. Bo Huang. Pharmaceutical Chemistry
Optical Sectioning Bo Huang Pharmaceutical Chemistry Approaches to 3D imaging Physical cutting Technical difficulty Highest resolution Highest sensitivity Optical sectioning Simple sample prep. No physical
More informationSimulation of Diffuse Optical Tomography using COMSOL Multiphysics
Simulation of Diffuse Optical Tomography using COMSOL Multiphysics SAM Kirmani *1 L Velmanickam 1 D Nawarathna 1 SS Sherif 2 and IT Lima Jr 1 1 Department of Electrical and Computer Engineering North Dakota
More informationarxiv: v2 [physics.med-ph] 7 Sep 2017
Mitigation of artifacts due to isolated acoustic heterogeneities in photoacoustic computed tomography using a variable data truncation-based reconstruction method Joemini Poudel a, Thomas P. Matthews a,
More informationGPU Ultrasound Simulation and Volume Reconstruction
GPU Ultrasound Simulation and Volume Reconstruction Athanasios Karamalis 1,2 Supervisor: Nassir Navab1 Advisor: Oliver Kutter1, Wolfgang Wein2 1Computer Aided Medical Procedures (CAMP), Technische Universität
More informationarxiv: v1 [cs.cv] 9 Jul 2018
Approimate k-space models and Deep Learning for fast photoacoustic reconstruction Andreas Hauptmann 1, Ben Co 2, Feli Lucka 1,3, Nam Huynh 2, Marta Betcke 1, Paul Beard 2, and Simon Arridge 1 arxiv:1807.03191v1
More informationFully Dense UNet for 2D Sparse Photoacoustic Tomography Reconstruction
Fully Dense for 2D Sparse Photoacoustic Tomography Reconstruction Steven Guan, Amir Khan, Parag V. Chitnis, and Siddhartha Sikdar Abstract Photoacoustic imaging is an emerging imaging modality that is
More informationDETERMINATION OF BREWSTER S ANGLE FOR GLASS AND PLASTIC USING A POLARIZED MONOCHROMATIC LIGHT SOURCE. Utsav Hanspal. Physics Honors Research Paper
DETERMINATION OF BREWSTER S ANGLE FOR GLASS AND PLASTIC USING A POLARIZED MONOCHROMATIC LIGHT SOURCE Utsav Hanspal Physics Honors Research Paper Dr. Watson Hanspal 2 INTRODUCTION When light moves between
More informationRay Optics. Lecture 23. Chapter 34. Physics II. Course website:
Lecture 23 Chapter 34 Physics II Ray Optics Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss: Chapter 34: Section 34.1-3 Ray Optics Ray Optics Wave
More informationPhase-Contrast Imaging and Tomography at 60 kev using a Conventional X-ray Tube
Phase-Contrast Imaging and Tomography at 60 kev using a Conventional X-ray Tube T. Donath* a, F. Pfeiffer a,b, O. Bunk a, W. Groot a, M. Bednarzik a, C. Grünzweig a, E. Hempel c, S. Popescu c, M. Hoheisel
More informationBME I5000: Biomedical Imaging
1 Lucas Parra, CCNY BME I5000: Biomedical Imaging Lecture 4 Computed Tomography Lucas C. Parra, parra@ccny.cuny.edu some slides inspired by lecture notes of Andreas H. Hilscher at Columbia University.
More informationMEDICAL IMAGE ANALYSIS
SECOND EDITION MEDICAL IMAGE ANALYSIS ATAM P. DHAWAN g, A B IEEE Engineering in Medicine and Biology Society, Sponsor IEEE Press Series in Biomedical Engineering Metin Akay, Series Editor +IEEE IEEE PRESS
More informationREDUCED ORDER MODELING IN MULTISPECTRAL PHOTOACOUSTIC TOMOGRAPHY
REDUCED ORDER MODELING IN MULTISPECTRAL PHOTOACOUSTIC TOMOGRAPHY Arvind Saibaba Sarah Vallélian Statistical and Applied Mathematical Sciences Institute & North Carolina State University May 26, 2016 OUTLINE
More informationChapter 33 cont. The Nature of Light and Propagation of Light (lecture 2) Dr. Armen Kocharian
Chapter 33 cont The Nature of Light and Propagation of Light (lecture 2) Dr. Armen Kocharian Polarization of Light Waves The direction of polarization of each individual wave is defined to be the direction
More informationScattering of Acoustic Waves from Ocean Boundaries
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Scattering of Acoustic Waves from Ocean Boundaries Marcia J. Isakson Applied Research Laboratories The University of Texas
More informationProperties of Light. 1. The Speed of Light 2. The Propagation of Light 3. Reflection and Refraction 4. Polarization
Chapter 33 - Light Properties of Light 1. The Speed of Light 2. The Propagation of Light 3. Reflection and Refraction 4. Polarization MFMcGraw-PHY 2426 Chap33-Light - Revised: 6-24-2012 2 Electromagnetic
More informationAt the interface between two materials, where light can be reflected or refracted. Within a material, where the light can be scattered or absorbed.
At the interface between two materials, where light can be reflected or refracted. Within a material, where the light can be scattered or absorbed. The eye sees by focusing a diverging bundle of rays from
More informationModeling of MR-guided HIFU for Breast and Brain Therapy
Modeling of MR-guided HIFU for Breast and Brain Therapy Douglas A. Christensen, Allison Payne, Nick Todd, Scott Almquist, Alexis Farrer and Dennis L. Parker University of Utah Salt Lake City, Utah Overview
More informationUse of a laser beam with an oblique angle of incidence to measure the reduced scattering coefficient of a turbid medium
Use of a laser beam with an oblique angle of incidence to measure the reduced scattering coefficient of a turbid medium Lihong Wang and Steven L. Jacques A simple and quick approach is used to measure
More informationAbsorption distribution of an optical beam focused into a turbid medium
Absorption distribution of an optical beam focused into a turbid medium Lihong V. Wang and Gan Liang The focusing of light into a turbid medium was studied with Monte Carlo simulations. Focusing was found
More informationNIH Public Access Author Manuscript IEEE Photonics J. Author manuscript; available in PMC 2010 October 14.
NIH Public Access Author Manuscript Published in final edited form as: IEEE Photonics J. 2010 February 17; 2(1): 57 66. doi:10.1109/jphot.2010.2042801. Fast and robust deconvolution-based image reconstruction
More informationPhys 102 Lecture 17 Introduction to ray optics
Phys 102 Lecture 17 Introduction to ray optics 1 Physics 102 lectures on light Light as a wave Lecture 15 EM waves Lecture 16 Polarization Lecture 22 & 23 Interference & diffraction Light as a ray Lecture
More informationLECTURE 37: Ray model of light and Snell's law
Lectures Page 1 Select LEARNING OBJECTIVES: LECTURE 37: Ray model of light and Snell's law Understand when the ray model of light is applicable. Be able to apply Snell's Law of Refraction to any system.
More informationA Simple and Accurate Matrix for Model Based Photoacoustic Imaging
A Simple and Accurate Matri for Model Based Photoacoustic Imaging K.J. Francis, Pradeep Mishra, P. Rajalakshmi, Sumohana S. Channappayya Dept. of Electrical Engineering, Indian Institute of Technology
More informationTheoretical and Experimental Investigation of the Influence of Frontal Sinus on the Sensitivity of the NIRS Signal in the Adult Head
Theoretical and Experimental Investigation of the Influence of Frontal Sinus on the Sensitivity of the NIRS Signal in the Adult Head Eiji Okada, Daisuke Yamamoto, Naoya Kiryu, Akihisa Katagiri, Noriaki
More information12/7/2012. Biomolecular structure. Diffraction, X-ray crystallography, light- and electron microscopy. CD spectroscopy, mass spectrometry
phase difference at a given distance constructive/destructive interference Biomolecular structure. Diffraction, X-ray crystallography, light- and electron microscopy. CD spectroscopy, mass spectrometry
More informationTechniques of Noninvasive Optical Tomographic Imaging
Techniques of Noninvasive Optical Tomographic Imaging Joseph Rosen*, David Abookasis and Mark Gokhler Ben-Gurion University of the Negev Department of Electrical and Computer Engineering P. O. Box 653,
More informationFast and Robust Deconvolution-Based Image Reconstruction for Photoacoustic Tomography in Circular Geometry: Experimental Validation
Fast and Robust Deconvolution-Based Image Reconstruction for Photoacoustic Tomography in Circular Geometry: Experimental Validation Volume 2, Number 1, February 2010 Invited Paper C. Zhang C. Li L. V.
More informationOther Laser Surgery Laser Tonsillectomy Use CO 2 with mirror bouncing system Operation takes 15 minutes, no pain Cauterizes blood vessels & Lymphatic
Other Laser Surgery Laser Tonsillectomy Use CO 2 with mirror bouncing system Operation takes 15 minutes, no pain Cauterizes blood vessels & Lymphatic vessels no blood in throat Patient eat & drink just
More informationPhotonics / Imaging / Display
Photonics / Imaging / Display Presenters: Prof. Chak-Yin Tang (PolyU) / Dr. Kevin Tsia (HKU) Other Members: Prof. Chi Hou Chan (CityU) Dr. Kenneth Kin-Yip Wong (HKU) Prof. Edmund Lam (HKU) Prof. Yongping
More informationSIMULATING ARBITRARY-GEOMETRY ULTRASOUND TRANSDUCERS USING TRIANGLES
Jørgen Arendt Jensen 1 Paper presented at the IEEE International Ultrasonics Symposium, San Antonio, Texas, 1996: SIMULATING ARBITRARY-GEOMETRY ULTRASOUND TRANSDUCERS USING TRIANGLES Jørgen Arendt Jensen,
More informationForward and Adjoint Radiance Monte Carlo Models for Quantitative Photoacoustic Imaging
Forward and Adjoint Radiance Monte Carlo Models for Quantitative Photoacoustic Imaging Roman Hochuli a, Samuel Powell b, Simon Arridge b and Ben Cox a a Department of Medical Physics & Biomedical Engineering,
More informationProceedings of Meetings on Acoustics
Proceedings of Meetings on Acoustics Volume 19, 2013 http://acousticalsociety.org/ ICA 2013 Montreal Montreal, Canada 2-7 June 2013 Biomedical Acoustics Session 1aBA: Ultrasound Tomography 1aBA3. A contrast
More informationA fast method for estimation of light flux in fluorescence image guided surgery
A fast method for estimation of light flux in fluorescence image guided surgery 1. Introduction In this document, we present a theoretical method to estimate the light flux in near-infrared fluorescence
More informationMODELING OF THREE-DIMENSIONAL PROPAGATION ON A COASTAL WEDGE WITH A SEDIMENT SUPPORTING SHEAR
MODELING OF THREE-DIMENSIONAL PROPAGATION ON A COASTAL WEDGE WITH A SEDIMENT SUPPORTING SHEAR Piotr Borejko Vienna University of Technology, Karlsplatz 13/E26/3, 14 Vienna, Austria Fax: + 43 1 588 1 21
More informationOutline The Refraction of Light Forming Images with a Plane Mirror 26-3 Spherical Mirror 26-4 Ray Tracing and the Mirror Equation
Chapter 6 Geometrical Optics Outline 6-1 The Reflection of Light 6- Forming Images with a Plane Mirror 6-3 Spherical Mirror 6-4 Ray Tracing and the Mirror Equation 6-5 The Refraction of Light 6-6 Ray Tracing
More informationThe Determination of Inner Surfaces in Composites by X-Ray Refraction
The Determination of Inner Surfaces in Composites by X-Ray Refraction A. H. Hampe, K.-W. Harbich, M. P. Hentschel and H.-V. Rudolph Bundesanstalt für Materialforschung und -prüfung (BAM), 12200 Berlin,
More informationQuantitative photoacoustic tomography using illuminations from a single direction
Quantitative photoacoustic tomography using illuminations from a single direction Aki Pulkkinen Ben T. Cox Simon R. Arridge Jari P. Kaipio Tanja Tarvainen Journal of Biomedical Optics 20(3), 036015 (March
More informationREFLECTION & REFRACTION
REFLECTION & REFRACTION OBJECTIVE: To study and verify the laws of reflection and refraction using a plane mirror and a glass block. To see the virtual images that can be formed by the reflection and refraction
More informationOption G 1: Refraction
Name: Date: Option G 1: Refraction 1. The table below relates to the electromagnetic spectrum. Complete the table by stating the name of the region of the spectrum and the name of a possible source of
More informationLecture 24 EM waves Geometrical optics
Physics 2102 Jonathan Dowling Lecture 24 EM waves Geometrical optics EM spherical waves The intensity of a wave is power per unit area. If one has a source that emits isotropically (equally in all directions)
More informationActive Echo: A New Paradigm for Ultrasound Calibration
Active Echo: A New Paradigm for Ultrasound Calibration Xiaoyu Guo, Alexis Cheng, Haichong K. Zhang, Hyun-Jae Kang, Ralph Etienne-Cummings, and Emad M. Boctor The Johns Hopkins University, Baltimore, MD
More informationChapter 35. The Nature of Light and the Laws of Geometric Optics
Chapter 35 The Nature of Light and the Laws of Geometric Optics Introduction to Light Light is basic to almost all life on Earth. Light is a form of electromagnetic radiation. Light represents energy transfer
More informationOPTICAL COHERENCE TOMOGRAPHY:SIGNAL PROCESSING AND ALGORITHM
OPTICAL COHERENCE TOMOGRAPHY:SIGNAL PROCESSING AND ALGORITHM OCT Medical imaging modality with 1-10 µ m resolutions and 1-2 mm penetration depths High-resolution, sub-surface non-invasive or minimally
More informationReflection and Refraction of Light
PC1222 Fundamentals of Physics II Reflection and Refraction of Light 1 Objectives Investigate for reflection of rays from a plane surface, the dependence of the angle of reflection on the angle of incidence.
More informationUNIVERSITY OF SOUTHAMPTON
UNIVERSITY OF SOUTHAMPTON PHYS2007W1 SEMESTER 2 EXAMINATION 2014-2015 MEDICAL PHYSICS Duration: 120 MINS (2 hours) This paper contains 10 questions. Answer all questions in Section A and only two questions
More informationRange Sensors (time of flight) (1)
Range Sensors (time of flight) (1) Large range distance measurement -> called range sensors Range information: key element for localization and environment modeling Ultrasonic sensors, infra-red sensors
More informationHHS Public Access Author manuscript Nat Photonics. Author manuscript; available in PMC 2011 September 01.
Time-reversed ultrasonically encoded optical focusing into scattering media Xiao Xu, Honglin Liu, and Lihong V. Wang * Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University
More informationLight & Optical Systems Reflection & Refraction. Notes
Light & Optical Systems Reflection & Refraction Notes What is light? Light is electromagnetic radiation Ultra-violet + visible + infra-red Behavior of Light Light behaves in 2 ways particles (photons)
More informationRay Optics. Ray model Reflection Refraction, total internal reflection Color dispersion Lenses Image formation Magnification Spherical mirrors
Ray Optics Ray model Reflection Refraction, total internal reflection Color dispersion Lenses Image formation Magnification Spherical mirrors 1 Ray optics Optical imaging and color in medicine Integral
More informationINTRODUCTION I. THEORY. 441 J. Acoust. Soc. Am. 108 (1), July /2000/108(1)/441/6/$ Acoustical Society of America 441
Field characterization of therapeutic ultrasound phased arrays through forward and backward planar projection G. T. Clement and Kullervo Hynynen Brigham & Women s Hospital, Harvard Medical School, 75 Francis
More informationInvestigation on reconstruction methods applied to 3D terahertz computed Tomography
Investigation on reconstruction methods applied to 3D terahertz computed Tomography B. Recur, 3 A. Younus, 1, P. Mounaix 1, S. Salort, 2 B. Chassagne, 2 P. Desbarats, 3 J-P. Caumes, 2 and E. Abraham 1
More informationTowards building an anatomically correct solid eye model with volumetric representation of retinal morphology
Towards building an anatomically correct solid eye model with volumetric representation of retinal morphology Robert J. Zawadzki a *, T. Scott Rowe b, Alfred R. Fuller c, Bernd Hamann c and John S. Werner
More informationImage Acquisition Systems
Image Acquisition Systems Goals and Terminology Conventional Radiography Axial Tomography Computer Axial Tomography (CAT) Magnetic Resonance Imaging (MRI) PET, SPECT Ultrasound Microscopy Imaging ITCS
More informationLight and the Properties of Reflection & Refraction
Light and the Properties of Reflection & Refraction OBJECTIVE To study the imaging properties of a plane mirror. To prove the law of reflection from the previous imaging study. To study the refraction
More informationPH880 Topics in Physics
PH880 Topics in Physics Modern Optical Imaging (Fall 2010) Overview of week 8 Monday Nonlinear Microscopy Wednesday No class (Mid term week) Quantum Optics Electro- magnetic Optics Wave Optics Ray Optics
More informationFinite Element Modeling and Multiphysics Simulation of Air Coupled Ultrasonic with Time Domain Analysis
More Info at Open Access Database www.ndt.net/?id=15194 Finite Element Modeling and Multiphysics Simulation of Air Coupled Ultrasonic with Time Domain Analysis Bikash Ghose 1, a, Krishnan Balasubramaniam
More information3. Scanning BRILLOUIN microscopy
3. Scanning BRILLOUIN microscopy 3.1. Principles of scanning BRILLOUIN microscopy versus ultrasonic pulse-echo techniques Acoustic microscopy spatially resolves the variation of acoustic properties of
More informationPhysics 1502: Lecture 28 Today s Agenda
Physics 1502: Lecture 28 Today s Agenda Announcements: Midterm 2: Monday Nov. 16 Homework 08: due next Friday Optics Waves, Wavefronts, and Rays Reflection Index of Refraction 1 Waves, Wavefronts, and
More informationarxiv: v1 [eess.sp] 11 Feb 2018
Research Article Journal of the Optical Society of America A Double Minimum Variance Beamforming Method to Enhance Photoacoustic Imaging ROYA PARIDAR, MOEIN MOZAFFARZADEH,2, MOHAMMADREZA NASIRIAVANAKI
More information10.5 Polarization of Light
10.5 Polarization of Light Electromagnetic waves have electric and magnetic fields that are perpendicular to each other and to the direction of propagation. These fields can take many different directions
More informationSound-speed tomography using first-arrival transmission ultrasound for a ring array
Sound-speed tomography using first-arrival transmission ultrasound for a ring array Youli Quan* a,b and Lianjie Huang b a Department of Geophysics, Stanford University, Stanford, CA 9435-2215 b Mail Stop
More informationDigital Image Processing
Digital Image Processing SPECIAL TOPICS CT IMAGES Hamid R. Rabiee Fall 2015 What is an image? 2 Are images only about visual concepts? We ve already seen that there are other kinds of image. In this lecture
More informationImage Reconstruction of the Speed of Sound and Initial Pressure Distributions in Ultrasound Computed Tomography and Photoacoustic Computed Tomography
Washington University in St. Louis Washington University Open Scholarship Engineering and Applied Science Theses & Dissertations Engineering and Applied Science Winter 12-15-2017 Image Reconstruction of
More informationNarcissus of Diffractive OpticalSurfaces. Jonathan B. Cohen. ElOp E1ectrooptics Industries Ltd. P.O.B , Rehovot , Israel LINTRODUCTION
Narcissus of Diffractive OpticalSurfaces Jonathan B. Cohen ElOp E1ectrooptics Industries Ltd. P.O.B. 1 165, Rehovot 7611 1, Israel 1. ABSTRACT Narcissus is usually approximated by means of a paraxial ray
More informationLecture 7 Notes: 07 / 11. Reflection and refraction
Lecture 7 Notes: 07 / 11 Reflection and refraction When an electromagnetic wave, such as light, encounters the surface of a medium, some of it is reflected off the surface, while some crosses the boundary
More informationMET 4410 Remote Sensing: Radar and Satellite Meteorology MET 5412 Remote Sensing in Meteorology. Lecture 9: Reflection and Refraction (Petty Ch4)
MET 4410 Remote Sensing: Radar and Satellite Meteorology MET 5412 Remote Sensing in Meteorology Lecture 9: Reflection and Refraction (Petty Ch4) When to use the laws of reflection and refraction? EM waves
More informationRefraction Corrected Transmission Ultrasound Computed Tomography for Application in Breast Imaging
Refraction Corrected Transmission Ultrasound Computed Tomography for Application in Breast Imaging Joint Research With Trond Varslot Marcel Jackowski Shengying Li and Klaus Mueller Ultrasound Detection
More informationImage Reconstruction in Photoacoustic Computed Tomography with Acoustically Heterogeneous Media
Washington University in St. Louis Washington University Open Scholarship All Theses and Dissertations (ETDs) Summer 9-1-214 Image Reconstruction in Photoacoustic Computed Tomography with Acoustically
More informationPY106 Class31. Index of refraction. Refraction. Index of refraction. Sample values of n. Rays and wavefronts. index of refraction: n v.
Refraction Index of refraction When an EM wave travels in a vacuum, its speed is: c = 3.00 x 10 8 m/s. In any other medium, light generally travels at a slower speed. The speed of light v in a material
More informationNondestructive tests of cylindrical steel samples using the ultrasonic projection method and the ultrasound transmission tomography method
Nondestructive tests of cylindrical steel samples using the ultrasonic projection method and the ultrasound transmission tomography method Krzysztof Opielinski and Tadeusz Gudra Wroclaw University of Technology/Institute
More informationALGORITHMS FOR SIMULATION OF SOUND AND ULTRASOUND PROPAGATION IN COMPLEX DISPERSIVE ENVIRONMENTS
ALGORITHMS FOR SIMULATION OF SOUND AND ULTRASOUND PROPAGATION IN COMPLEX DISPERSIVE ENVIRONMENTS Marjan Sikora Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, R. Boškovića
More informationWavefronts and Rays. When light or other electromagnetic waves interact with systems much larger than the wavelength, it s a good approximation to
Chapter 33: Optics Wavefronts and Rays When light or other electromagnetic waves interact with systems much larger than the wavelength, it s a good approximation to Neglect the wave nature of light. Consider
More information10/5/09 1. d = 2. Range Sensors (time of flight) (2) Ultrasonic Sensor (time of flight, sound) (1) Ultrasonic Sensor (time of flight, sound) (2) 4.1.
Range Sensors (time of flight) (1) Range Sensors (time of flight) (2) arge range distance measurement -> called range sensors Range information: key element for localization and environment modeling Ultrasonic
More informationPolarization of Light
Polarization of Light Introduction Light, viewed classically, is a transverse electromagnetic wave. Namely, the underlying oscillation (in this case oscillating electric and magnetic fields) is along directions
More informationCALCULATING SNELL S LAW
CALCULATING SNELL S LAW What is Snell s Law? Snell s Law defines angular relationships of sound waves crossing an interface. The calculations for Snell s Law will come into play when we are conducting
More informationLarge-scale Ultrasound Simulations Using the Hybrid OpenMP/MPI Decomposition
Large-scale Ultrasound Simulations Using the Hybrid OpenMP/MPI Decomposition Jiri Jaros*, Vojtech Nikl*, Bradley E. Treeby *Department of Compute Systems, Brno University of Technology Department of Medical
More informationReal-time Three-dimensional Photoacoustic Imaging
Western University Scholarship@Western Electronic Thesis and Dissertation Repository August 2011 Real-time Three-dimensional Photoacoustic Imaging Michael B. Roumeliotis The University of Western Ontario
More informationLecture 6: Medical imaging and image-guided interventions
ME 328: Medical Robotics Winter 2019 Lecture 6: Medical imaging and image-guided interventions Allison Okamura Stanford University Updates Assignment 3 Due this Thursday, Jan. 31 Note that this assignment
More informationDiffuse light tomography to detect blood vessels using Tikhonov regularization Huseyin Ozgur Kazanci* a, Steven L. Jacques b a
Diffuse light tomography to detect blood vessels using Tikhonov regularization Huseyin Ozgur Kazanci* a, Steven L. Jacques b a Biomedical Engineering, Faculty of Engineering, Akdeniz University, 07058
More information