RF diffraction effect in RF-induced thermoacoustic tomography: calibration and distortion

Changhui Li; Geng Ku; Pramanik Manojit; Lihong V. Wang

doi:10.1117/12.763450

28 February 2008 RF diffraction effect in RF-induced thermoacoustic tomography: calibration and distortion

Changhui Li, Geng Ku, Pramanik Manojit, Lihong V. Wang

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 685612 (2008) https://doi.org/10.1117/12.763450
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Because the wavelengths of radio-frequency (RF) waves used in thermoacoustic tomography (TAT) are comparable with the size of detected objects, RF diffraction plays important roles in TAT. The RF diffraction affects not only the global distribution of the RF field in the tissue, but also local RF energy deposition. In this paper, we discussed these two major effects. Both numerical simulations and phantom experiments are done to demonstrate these phenomena. We also provide a partial correction method for the image distortion and a calibration algorithm for image calibration.

Citation Download Citation

Changhui Li, Geng Ku, Pramanik Manojit, and Lihong V. Wang "RF diffraction effect in RF-induced thermoacoustic tomography: calibration and distortion", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685612 (28 February 2008); https://doi.org/10.1117/12.763450

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