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Portable Patient Training Device for Lung Cancer Treatment

Portable Patient Training Device for Lung Cancer Treatment. Thomas Chia Jason Ethington Brent Geiger Kawai Chan Client: Bhudatt Paliwal, PhD Advisor: Willis Tompkins, PhD. Problem Statement. Lung cancer radiation treatments require stable patient breathing

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Portable Patient Training Device for Lung Cancer Treatment

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  1. Portable Patient Training Device for Lung Cancer Treatment Thomas Chia Jason Ethington Brent Geiger Kawai Chan Client: Bhudatt Paliwal, PhD Advisor: Willis Tompkins, PhD

  2. Problem Statement • Lung cancer radiation treatments require stable patient breathing • A repeatable breathing trainer is desired • Device to be used at home and be portable • Display patient’s real-time breathing pattern and guiding cycles

  3. Tomotherapy Radiation Treatment for Cancer 3-D Imaging of Target Tissue Helical Delivery Pattern Intensity Modulation Radiotherapy (IMRT) -Multileaf Collimator (MLC) Radiation Concentrates on Moving Target Tissue

  4. Monitoring Breathing Pattern Current Devices Used During Procedure • Infrared Sensor and Reflector • Laser and Laser Sensor • Spirometer • Patient Must Breathe with a Repeatable Pattern

  5. Design Motivations and Restraints • Patient Needs to Practice Steady Repeatable Breathing • Show Patient’s Breathing Pattern and Guiding cycle • Small and Portable • User Friendly

  6. Design Alternatives • Breathing Pattern Measurement Hardware -Thermistor, Inductance Pneumography, or Linear Potentiometer • Data/Signal Processing - Visual Basic vs. Labview • User Interface and Display - Laptop vs. PDA

  7. Use Nasal Thermistor or Thermocouple to detect airflow Thermistor output to microcontroller for processing Wireless RF to PC for long term Data Acquisition Thermistor Based Breathing Sensor Javanov et al.

  8. Inductance Pneumography • Measure changes in respiratory volume through changes in inductance • Small inductor wire attached across chest • Measured change in inductance corresponds to amplitude of breath

  9. Advantages - Accurate - Minimally invasive Disadvantages - Measures chest movement - Prone to motion and ECG artifact - Requires proper lead placement - Complex Inductance Pneumography

  10. Linear Displacement Potentiometer • Miniature linear displacement potentiometer • Cable extension converted to analog voltage • Analog signal processing and real time display

  11. Advantages - Small - Minimally invasive - Simple analog voltage divider output Disadvantages - Expensive - Requires proper placement based on breathing habits (i.e. stomach vs. chest) Linear Displacement Potentiometer

  12. Design Matrix Ranking on a 1- 5 scale (5 is best)

  13. Data and Signal Processing • Data Processing - Visual Basic versus LabView program - LabView is a program designed specially for real-time data acquisition - Less complicated than Visual Basic - Able to develop stand-alone programs

  14. User Interface and Display • Laptop versus PDA / Pocket PC - Most A/D converters are compatible with laptop. - LabView program works on Laptop.

  15. Proposed Solution

  16. Proposed Solution • High Cost • Potentiometer - $200 • PDA or video goggle - $300+ • A/D Converter - $100 • Piecing together hardware is straightforward • Software programming will be difficult

  17. Future Work • Build potentiometer into small box • Construct attachment strap • Interface analog output with Labview • Design Labview program to recognize and display analog signal • Display breathing cycle waveform in real-time on laptop • Scale entire design to PDA • Disclose for patent

  18. Special Thanks Prof. Willis Tompkins Bhudatt Paliwal, PhD. Tiezhi Zhang Prof. John Webster Burke O’Neal Paul Victorey

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