1. Arin Ellingson Anika Lohrentz Ben Schoepke Alice Tang Advisor- Paul Thompson Ph.D. Client- Ken Schreibman M.D., Ph.D.

2. INTELLECTUAL PROPERTY STATEMENT All information provided by individuals or Design Project Groups during this or subsequent presentations is the property of the researchers presenting this information. In addition, any information provided herein may include results sponsored by and provided to a member company of the Biomedical Engineering Student Design Consortium (SDC). Anyone to whom this information is disclosed: 1) Agrees to use this information solely for purposes related to this review; 2) Agrees not to use this information for any other purpose unless given written approval in advance by the Project Group, the Client / SDC, and the Advisor. 3) Agrees to keep this information in confidence until the relevant parties listed in Part (2) above have evaluated and secured any applicable intellectual property rights in this information. 4) Continued attendance at this presentation constitutes compliance with this agreement.

3.  Problem Statement  Background  Client Requirements  Previous Semester’s Work  Design Components  Future Work

4.  Need standard way to image feet  Simulate weight bearing conditions

5.  Computed tomography (CT)  X-ray imaging from many angles  Computer reconstruction  Client’s focus: ankle CT http://nvchospital.com/CPM/Scanner1.jpg http://www.ablesw.com/3d-doctor/images.html

6.  Apply measurable load to feet  Contains no radiopaque materials  Holds feet in standardized position  Portable  Able to be disinfected

7.  Developed rough prototype to prove concept

8. 1. Air Bladder 2. Air Pump 3. Pressure Measurement 4. Linear Plate Motion

9.  Requirements  Flat ends  Extends 3-5 in.  Cost effective  Matjack brand  $290  Inflatable cube  $13

10.  Battery powered  Remote controlled Rena Aquarium Pump ~ $20 http://www.planetrena.com/aquarium-air-pumps.html Hargraves Diaphragm Pump ~ $50 http://www.hargravesfluidics.com/pdf/CTS_new.pdf Pump Control Circuit

11.  Pressure = Force / Area  Surface area = 64 in 2  Force ~ 50 to 80 pounds  Therefore pressure ~ 0.8 to 1.3 psi  Measured with digital pressure gauge or transducer http://www.ashcroft.com/

12.  Guide rails + Simple, easy to implement - May not be completely stable  Scissor jack + Stable, purely linear motion - Complex http://www.sourceequipment.com/p2536-lift-table.jpg

13. 1. Air Bladder 2. Air Pump 3. Pressure Measurement 4. Linear Plate Motion

14.  Pursue patent through WARF  Build circuit for pump control  Assemble device  Run through CT scanner with phantom  IRB approval for testing  Conduct research project

15.  Smith, H. Computed tomography. GE Healthcare Medcyclopaedia 2006, 3 (2006) http://www.medcyclopaedia.com/library/radiology/chapter04/4_2.aspx. http://www.medcyclopaedia.com/library/radiology/chapter04/4_2.aspx Questions?