MR Airway Pressure Device

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MR Airway Pressure Device
Group Members Laura Sheehan Kevin Johnson Jon
Cappel Noelle Simatic Client Dr. Victor
Haughton Advisor Prof. Mitch Tyler
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Chiari I Malformations
http//www.chiariclinic.org
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MR Background
Tuner
90.7
104.1
B
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Device
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Device
Normal Breathing(Holes Open)
Valsalva(Holes Closed)
Vacuum
Compressed Air
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Validation

• Device Precision
• 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
• Whats the best way to perform this?
• Human/Animal Subjects Testing
• Final evaluation!!

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Device Precision Test
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

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Device Precision Results
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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 (R0.998)
• Slope of 1.01

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MR Compatibility Test
Image 2
Image 1
Noise
Without Device
Artifact
With Device
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MR Compatibility Preliminary Results
Baseline
With Device
No obvious artifact but This noise level is
unacceptable !!!!!
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MR Compatibility Future Work
RF
DAQ
Device
Shielding (copper)
Control Room
MR Suite
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Future Work

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

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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