1. MR Airway Pressure Device
Group Members
Laura Sheehan
Kevin Johnson
Jon Cappel
Noelle Simatic
Client
Dr. Victor Haughton
Advisor
Prof. Mitch Tyler

2. Chiari I Malformations

3. MR Background
Tuner
90.7
104.1 B

4. Device

5. Normal Breathing (Holes Open) Valsalva (Holes Closed)
Device
Normal Breathing (Holes Open)
Valsalva (Holes Closed)
Vacuum
Compressed Air

6. Validation Device Precision MR Compatibility Protocol Development
Does the MR environment effect precision?
Does scanning effect precision?
MR Compatibility
Does our device cause artifacts?
Does our device degrade image quality?
Protocol Development
What’s the best way to perform this?
Human/Animal Subjects Testing
Final evaluation!!

7. Device Precision: Test
Computer
Controlled
Flow Pump
Transducer
DAQ
Trigger
Measured ~240 Periods of Square flow waveform
Outside room  With Setup in Side Room
Inside Bore  Normal Setup
During Scan Normal Setup during a scan

8. Device Precision: Results

9. Device Precision: Results
SNR Measures
Outside room: 40.99
Bore: 28.3
During Scan: 26.8
All less than 5% error
Correlation Analysis
Plotted Values against each other
Pearson Coef (R=0.998)
Slope of 1.01

10. MR Compatibility: Test
Image 1
Image 2
Noise
With Device
Without Device
Artifact

11. MR Compatibility: Preliminary Results
Baseline
With Device
No obvious artifact but
This noise level is unacceptable !!!!!

12. MR Compatibility: Future WorkRF
Z104
Top 100 Talk Radio
DAQ
Device
NPR
Shielding (copper)
Control Room
MR Suite

13. Future Work MR Compatibility Anesthetized Patient Prototype
Additional Shielding
Anesthetized Patient Prototype
Protocol Development
Human/Animal Subjects Testing
IRB Approval
Outreach Presentation
Final Deliverables

14. as Chiari Patient “Little Suzie”
Questions?
Laura
as Airway Team Member
Noelle
as Chiari Patient “Little Suzie”
Kevin
as Mitch Tyler
Jon
as Vic Haughton, M.D.
Kevin
as MR Tech