Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2023. №9
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2023.9.1
Reconstructive methods for ultrasound tomography
for visualisation the temperature fluctuations
in human tissue
K.M. Bograchev
Kotelnikov IRE RAS
125009, Russia, Moscow, Mokhovaya str., 11, b.7
The paper was received December 27, 2022.
Abstract. Thermal therapy is an emerging non-invasive method used for cancer treatment. Implementation of this method requires non-invasive temperature monitoring during the treatment process and through-transmission ultrasonic tomography is a potential technique for such monitoring. The technique allows internal cross-sectional images of acoustic properties to be obtained. These properties change with temperature and the technique therefore allows the temperature field in the tissue to be measured non-invasively. The accuracy of this technique is significantly reduced, however, for regions of tissue which contain acoustically non-transparent objects such as medical devices or implants, because these cause missing parts in the projection data. The heated lesion itself may also distort ultrasonic rays. The present work considers and compares different methods of solving the inverse problem for ultrasonic tomographical reconstruction. A special method, which is a modification of the expectation maximization (EM) method for temperature distribution reconstruction from noisy projections with missing data, has been developed for through-transmission fan-beam tomography. The accuracy of the developed method was investigated by computer modeling and compared with the conventional EM method. It was shown that the developed method gives higher accuracy and less distortion after reconstruction than the conventional EM methods.
Key words: reconstructive methods, ultrasound tomography, temperature monitoring, hyperthermia.
Corresponding author: Konstantin Markovich Bograchev, link4900@gmail.com
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For citation:
Bograchev K.M. Reconstruction methods in ultrasound tomography for visualisation the temperature fluctuations in human tissue. Zhurnal radioelektroniki [Journal of Radio Electronics] [online]. 2023. №9. https://doi.org/10.30898/1684-1719.2023.9.1 (In Russian)