Shielding for thermoacoustic tomography with RF excitation

M. Mitchell; G. Becker; P. Dey; J. Generotzky; S. K. Patch

doi:10.1117/12.763070

11 March 2008 Shielding for thermoacoustic tomography with RF excitation

M. Mitchell, G. Becker, P. Dey, J. Generotzky, S. K. Patch

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 68560X (2008) https://doi.org/10.1117/12.763070
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Radiofrequency (RF) pulses used to generate thermoacoustic computerized tomography (TCT) signal couple directly into the pulser-receiver and oscilloscope, swamping true TCT signal. We use a standard RF enclosure housing both RF amplifier and object being imaged. This is similar to RF shielding of magnetic resonance imaging (MRI) suites and protects electronics outside from stray RF. Unlike MRI, TCT receivers are ultrasound transducers, which must also be shielded from RF. A transducer housing that simultaneously shields RF and permits acoustic transmission was developed specifically for TCT. We compare TCT signals measured with and without RF shielding.

Citation Download Citation

M. Mitchell, G. Becker, P. Dey, J. Generotzky, and S. K. Patch "Shielding for thermoacoustic tomography with RF excitation", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68560X (11 March 2008); https://doi.org/10.1117/12.763070

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