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In this work, we evaluate methods for detecting brain injury using ultrasound. We have used simulations of ultrasonic fields in the head to model the phase distortion of the skull. In addition we present experimental data from the crania of large animals. The experimental data help us understand and evaluate the performance of different transducers in acquiring the backscatter data from the brain through the skull. Both the simulations and acquired data illustrate the superiority of lower-frequency (<EQ 1 MHz) ultrasonic fields for transcranial acquisition of signals from inside the brain. Additionally, the experimental work shows that the higher-frequency (5 MHz) ultrasound can also be useful in acquiring clean nearfield data to help detect the position of the inner boundary of the skull.
Joel Mobley,Paul M. Kasili,Stephen J. Norton, andTuan Vo-Dinh
"Application of ultrasonic techniques for brain injury diagnosis", Proc. SPIE 3595, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems, (9 July 1999); https://doi.org/10.1117/12.351520
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Joel Mobley, Paul M. Kasili, Stephen J. Norton, Tuan Vo-Dinh, "Application of ultrasonic techniques for brain injury diagnosis," Proc. SPIE 3595, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems, (9 July 1999); https://doi.org/10.1117/12.351520