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Portable Patient Training Portable Patient Training Device for Lung Cancer Device for Lung Cancer
TreatmentTreatmentBME 400BME 400
Thomas ChiaThomas ChiaJason EthingtonJason Ethington
Brent GeigerBrent GeigerKawai ChanKawai Chan
Client: Bhudatt Paliwal, PhDClient: Bhudatt Paliwal, PhDTiezhi Zhang, PhDTiezhi Zhang, PhD
Advisor: Justin Williams, PhDAdvisor: Justin Williams, PhD
BackgroundBackground
Radiation Treatment for Radiation Treatment for CancerCancer 3-D Imaging of Target Tissue3-D Imaging of Target Tissue Helical Delivery PatternHelical Delivery Pattern Intensity Modulation Intensity Modulation Radiotherapy Radiotherapy (IMRT)(IMRT)
-Multileaf Collimator (MLC)-Multileaf Collimator (MLC) Radiation Concentrates on Radiation Concentrates on Moving Target TissueMoving Target Tissue
Problem StatementProblem Statement
Lung cancer radiation treatments require Lung cancer radiation treatments require stable patient breathingstable patient breathing
A repeatable breathing trainer is desiredA repeatable breathing trainer is desiredDesign device to measure and display Design device to measure and display
patient’s breathing patternpatient’s breathing patternDisplay patient’s real-time breathing Display patient’s real-time breathing
pattern against a guiding cyclepattern against a guiding cycle
Client RequirementsClient Requirements
Device must be small and portableStill function as a training device for
used outside of treatmentUsed to monitor patient breathing
while undergoing Tomotherapy treatment
Previous WorkPrevious Work
Continuation from BME 301Completed a functioning prototypeThree major components:
-Sensing hardware
-Data acquisition
-LabView program
Previous Work – Sensing HardwarePrevious Work – Sensing Hardware
Linear potentiometer attached around chest
Voltage change corresponds to chest movement
9 Volt battery and switch
Previous Work – User Interface and Previous Work – User Interface and Data AcquisitionData Acquisition
National Instruments PCMCIA DAQ-6024E A/D converter
Laptop with PCMCIA port and LabView 7.0
Previous Work – LabView Software Previous Work – LabView Software ProgramProgram
Displayed breathing pattern against guiding pattern
Ability to save multiple guiding patterns
Current Work – Sensing Current Work – Sensing HardwareHardware
Design measurement hardware as small as possible
Attach only potentiometer to strapBattery and switch housed away from
strap All materials must be evaluated for
compatibility with radiation
Current Work – Sensing Current Work – Sensing HardwareHardware
Use larger strap to allow secure attachment of potentiometer to plastic mounting plate
Potentiometer wire embedded in elastic portion of strap
Extend wires and battery away from strap, construct smaller box
Current Work – PDA and Data Current Work – PDA and Data Acquisition Acquisition
Previous version on a laptopPrevious version on a laptopScale the patient feedback Scale the patient feedback
interface down to portable PDAinterface down to portable PDANeed a data acquisition card Need a data acquisition card
(A/D converter) to fit inside (A/D converter) to fit inside PDAPDA
Current Work – PDA and Data Current Work – PDA and Data Acquisition Acquisition
Asus: MyPal A620Asus: MyPal A620Windows PocketPCWindows PocketPC400MHz Intel XScale400MHz Intel XScaleSupports Compact Flash Supports Compact Flash
(CF)(CF)MSRP: $300MSRP: $300
Current Work – PDA and Data Current Work – PDA and Data Acquisition Acquisition
Compact Flash Data Compact Flash Data Acquisition CardAcquisition Card
24-bit Analog Input24-bit Analog InputSupports LabVIEW PDASupports LabVIEW PDAMSRP: $850MSRP: $850
Current Work – LabView 7.1 Current Work – LabView 7.1 Software Software
Improve display of guiding cycle vs. real-Improve display of guiding cycle vs. real-time breathing patternstime breathing patterns (i.e. waveform (i.e. waveform graph)graph)
Convert to PDA format that is compatible Convert to PDA format that is compatible with the use of Pocket PCwith the use of Pocket PC
Current Work – LabView 7.1 Current Work – LabView 7.1 Software Software
Compile LabView software program into Compile LabView software program into PDA formatPDA format
Design and test in PDA emulator to mimic Design and test in PDA emulator to mimic the actual PDA devicethe actual PDA device
Sampling rate on PDA can be 1000 Sampling rate on PDA can be 1000 samples/sec+samples/sec+
Future Work Future Work
File patent application disclosureFile patent application disclosureContact IRB regarding human subjects Contact IRB regarding human subjects
implicationsimplicationsBegin testing of device outside of Begin testing of device outside of
Tomotherapy machineTomotherapy machineTest device inside Tomotherapy machineTest device inside Tomotherapy machine
Special ThanksSpecial ThanksDr. Bhudatt Paliwal Dr. Bhudatt Paliwal
Professor of Human Oncology & Medical PhysicsProfessor of Human Oncology & Medical Physics
Director Radiation Oncology Physics Director Radiation Oncology Physics
Tiezhi ZhangTiezhi Zhang Assistant Researcher Assistant Researcher
Human Oncology DepartmentHuman Oncology Department
Justin WilliamsJustin WilliamsProfessor Biomedical EnginneeringProfessor Biomedical Enginneering
University of Wisconsin MadisonUniversity of Wisconsin Madison
Adam SweetAdam SweetNational Instruments ConsultantNational Instruments Consultant
Questions?Questions?