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Comparison between diffuse infrared and acoustic transmission over the human skull
Q Wang1, N Reganti1, Y Yoshioka1
1Dept. of Biomedical Eng., Cleveland Clinic, Cleveland, OH.
Proceedings of Meetings on Acoustics. Acoustical Society of America
|January 13, 2015
Summary
This study explores using infrared light to correct skull-induced distortions in transcranial imaging. Preliminary results show a correlation between sound speed and optical intensity through bone.
Area of Science:
- Biomedical Optics
- Acoustics
- Medical Imaging
Background:
- Skull-induced distortions challenge transcranial imaging and therapy.
- Current aberration correction methods using CT scans are impractical for imaging.
- A simplified approach for aberration correction is needed.
Purpose of the Study:
- Investigate diffuse infrared light as an indicator of acoustic properties for aberration correction.
- Assess the correlation between optical intensity and acoustic properties (sound speed, amplitude) through bone.
Main Methods:
- Used a human skull section in transmission mode.
- Illuminated the inner skull surface with an infrared heat lamp.
- Acquired images with an IR-sensitive camera and measured acoustic properties using a hydrophone.
Main Results:
- Observed a positive correlation between sound speed and optical intensity.
- Found a poor correlation between acoustic amplitude and optical intensity.
Conclusions:
- Diffuse infrared light shows potential as an indicator for acoustic properties related to sound speed in transcranial applications.
- Further research is needed to validate these findings for aberration correction in transcranial imaging and therapy.
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