µPET/CT Heating Device

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Presentation transcript:

µPET/CT Heating Device Team Leader – Justin Schmidt Communicator – Eric Printz BWIG – Victoria Vasys BSAC – Eric Bader Client – Dr. Robert Jeraj Ph.D Advisor – Professor Brenda Ogle Ph.D

Overview Description of µPET/CT Medical Imaging Tool Causes of Hypothermia on the Animals Proposal Heating System Requirements Heating System Design-Current Design Heating System Design-Modifications/Design Matrices Future Work

µPET/CT Medical Imaging Tool Used to study cancerous cells in small animals PET tracks intensity of cells’ metabolic rate CT provides detailed anatomy image Together they represent complete image

Hypothermia of the Animals Metabolic rates of the animals under anesthesia are greatly reduced Can lead to hypothermia or death Currently heat lamps provide non-uniform temperatures

Proposal Design a heating device to prevent hypothermia and help increase accuracy of scans

Heating System Requirements Client Requirements No metal parts Controllable temperature near subjects body temperature No moving parts Device must fit inside µPET/CT scanning chamber (10 cm. diameter)

Current Design Mouse enclosure Two chamber system Removable platform Poor Insulation

Current Design Heater Nichrome Insulation DC Power Supply

Current Design Pump Fish tank air pump Tubing Poor Insulation Vinyl

Modifications Mouse enclosure Outer insulation Wrap-around tube Platform Accessibility 118°F required in lower chamber

Platform Design Matrix Criteria Weights Mesh Polyethylene Acrylic Cost 0.1 0.2 0.3 Conductivity 0.35 1.05 0.7 Machineability 0.4 0.6 Mouse Health TOTAL 1 1.80 2.45 1.75

Modifications Heater Nichrome Insulation Plug in power Two Coils Thicker PVC Plug in power

Heater Design Matrix Criteria Weights Thicker PVC Copper Thermo-Insulated Cost 0.1 0.3 0.2 Insulation 0.6 1.2 1.8 Machineability 0.9 TOTAL 1.00 2.4 1.4 2.2

Modifications Tubing Vinyl Tubing Poor Insulation

Tubing Design Matrix Criteria Weights Insulation Wrap PVC Teflon 0.5 1.5 1.0 Machineability 0.1 0.3 0.2 Durability 0.6 0.4 Cost TOTAL 1.6 2.7 1.7

Future Work Heater Mouse Enclosure Calibration and Testing Assemble Build Power Supply Test Output Mouse Enclosure Wrap Around Tubing Platform Insulate Calibration and Testing

Acknowledgements Mahesh Mahanthappa Professor Ogle Paul Fraser Mo

Questions?

Heat Transfer Calculations

References MatWeb – Online Material Data Sheet. Online. http://www.matweb.com/search/SpecificMaterial.asp?bassnum=O1300 Webster, J. G. 2004. Bioinstrumentation. Hoboken, NJ: John Wiley & Sons, Inc.