Download Future Work

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
Motivations
•When Patient Breaths Target Tissue Moves
•Patient Needs to Breath in Steady
Repeatable Pattern
•Patient Needs to Practice the Breathing at
Home
•Current Devices are Large, Expensive and
Hard to Use
Client Requirements
•Patient Must Practice Breathing Pattern at
Home
•Display of Patients Breathing Pattern and
Guiding Cycle
•Device Must be Small and Portable
•Device Must be User Friendly
Inside the Project Box
Pocket PC with PCMCIA Cradle
Screen Shots of
Client and Patient Program
Hardware
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ABS plastic project box (4” x 1.5” x 2”)
Linear Potentiometer with 3” of travel
9V Battery
SPDT Toggle Switch
Adjustable Chest Strap with Buckle
NI DAQ-6024E A/D Converter (PCMCIA Style)
Male/Female Electrical Connectors
Hardware
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Project box attached to chest strap with
rivets
Tension of chest strap increased with
elastic band
Displacement limited by slack on chest
strap
Output voltage 0V-9V based on string
displacement
Software
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Programmed in LabView
Signal sampled from National Instrument Data
Acquisition Card
Sampling rate can be adjusted accordingly
2 Programs:
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Client: For obtaining the guiding cycle
Patient: Display real-time breathing and guiding cycle
simultaneously
Software
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Currently program can only read the
guiding cycle once
Need to repeat guiding cycle
continuously
Improve way of displaying guiding cycle
and real-time breathing patterns (i.e.
waveform graph)
Future Work
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Scale design down to portable PDA
operated device
PDA must be fitted with PCMCIA cradle
for DAQ card interface
LabVIEW 7.0 PDA module supports
applications on PDA
Create custom digital cable to replace
bulky digital acquisition board
Future Work
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Eventually design device for use in the
tomotherapy machine
Video goggles and new software for display to
patient while in tomotherapy machine
All materials used analyzed for safety in high
radiation environment
Calculate attenuation and compensate during
treatment
Human subjects approval
Future Work
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Plan to continue work as BME 400
Capstone design project
Wish to refine and completely finish
design
Disclose for patent over summer
Present finalized design to client and
production company