Alternative Designs Report 3D Ultrasound Reconstruction By: Michael Golden Khayriyyah Munir Omid Nasser Bidgeli. Team #3. Client: Dr.

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1 Alternative Designs Report 3D Ultrasound Reconstruction By: Michael Golden Khayriyyah Munir Omid Nasser Bidgeli Team #3 Client: Dr. Joseph McIsaac

2 Alternative Design 1- Camera Mounting Two cameras will be mounted on 80/20 Inc s T-slotted aluminum framing in a constructed mounting mold. There are three options for the setup of the mount. Option 1 Fixed sawhorse support In this design, there are a total of five bars, all composed of 80/20 Inc s T-slotted aluminum. Bar A is four feet long and arranged parallel to the floor with both cameras mounted parallel to each other. The cameras are mobile in the x-direction in order to find an optimal distance between them for more accurate determinations of the distance between the cameras and the patient. Bars B and Bars C are also four feet long and are connected at 30 degrees. All bars are connected at points P and Q. The advantages of this design include the mobility of the cameras in the x direction as well as the convenience of the support structure. With everything connected, the structure can be taken from room to room to be used wherever needed.

3 Option 2- Sliding angled support In this design, there are a total of five bars, all composed of 80/20 Inc s T-slotted aluminum. Bar A is four feet long and arranged parallel to the floor, with two cameras mounted parallel to each other. The cameras are mobile in the x-direction in order to find the optimal distance between them for more accurate determinations of the distance between the cameras and the patient. Bar A is attached at either end to Bars B, and is mobile in the plane of Bars B. Bars B are each fixed to a two foot Bar C at 60 degrees. The advantages of this design include the ability for the cameras to move in the y-direction. This allows the physician to adjust the height of the cameras to be specific for any bed or patient in the hospital. The disadvantages of this design include the fact that as the height of Bar A decreases, the angle between the cameras and what needs to be imaged on the patient changes. This significantly increases the mathematical calculations necessary to determine the position of the ultrasound probe because a new set of calculations is necessary for every location of Bar A.

4 Option 3 Sliding perpendicular support In this design, there are a total of five bars, all composed of 80/20 Inc s T-slotted aluminum. Bar A is four feet long and arranged parallel to the floor, with two cameras mounted parallel to each other. The cameras are mobile in the x-direction in order to find an optimal distance between them for more accurate determinations of the distance between the cameras and the patient. Bars B are perpendicular to the floor, and each attached to either end of Bar A. Bar A is mobile in the y-direction because Bar A is composed of T-slotted aluminum. The advantages of this design include the ability for the cameras to move in both the x-direction and the y-direction, making it possible to find the optimal position for both cameras for various bed heights throughout the hospital and patient sizes.

5 Alternative Design 2 Camera Configuration Option 1 Perpendicular In this design, each camera will be mounted to one end of an L-shaped support with each leg measuring 4.5 feet in length. They will both image the probe and tracking system, but in a perpendicular fashion. The disadvantages of this design include the fact that is very bulky and requires a lot of material. It takes up a lot of space and would inhibit the movement of the physician, and therefore his contact with the patient, from two directions. Also with the cameras arranged 90 degrees to each other, the convergence of the image areas is much less, so the location of the patient needs to be very specific and is not easily changed with patient variance.

6 Option 2 Parallel In this design, both cameras are arranged on one bar, four feet in length, and parallel to each other. Because they both image from the same direction, the stereotriangulation calculations are simpler. The cameras are close to each other which makes this design extremely space efficient. The optimal distance from the patient is four feet, and as along as this is the case the spatial configuration can be anything, as long as the patient is in the view of the cameras. There is no need for the cameras to be in any one specific location, which is desirable for the physician.

7 Alternative Design 3 Tracking system configuration Option 1 In-line Configuration In this design, spheres A, B, and D are configured in an equilateral triangle, all in the same plane. The ultrasound probe is attached to sphere A, in the same line as that made by connected A and B. The disadvantages of this design include the fact that if for some reason the ultrasound probe is in line with the focal line of one of the cameras, the camera will only image two spheres, with the other being lost. This would give rise to complications in the calculations, as information from three spheres is necessary for sterotraingulation.

8 Option 2 Perpendicular and off Center In this design, spheres A, B, and D are configured in an equilateral triangle, all in the same plane. The ultrasound probe is attached to sphere D, perpendicular to the plane formed by spheres A, B, and D. The advantages to this design include that at any point all three spheres are imaged, and there is no way for them to block one another from either one of the cameras. Disadvantages of this design include a non-optimal range of motion, particularly with respect to spheres A and B. As the angle between the probe and the neck region decreases, spheres A and B get significantly closer to the patient and can eventually make contact with the patient, limiting the range of motion in that direction.

9 Option 2 Perpendicular and Centered In this design, spheres A, B, and D are configured in an equilateral triangle, all in the same plane. The ultrasound probe is perpendicular to the plane, but at the centroid of the plane. Advantages to this design include that at any point, all three spheres are imaged and there is no way for them to block one another from either of the cameras. Also, with the ultrasound probe being located at the centroid, the physician has the greatest range of motion in any direction.

3D Ultrasound Reconstruction By The 3 Cons: Michael Golden Khayriyyah Munir Omid Nasser Bigdeli

3D Ultrasound Reconstruction By The 3 Cons: Michael Golden Khayriyyah Munir Omid Nasser Bigdeli Client Contact: Dr. Joseph McIsaac Hartford Hospital 80 Seymour St. PO Box 5037 Hartford, CT 06102 (860)