Hongbo Chen

A new method for noninvasive temperature estimation is proposed in this paper. Noninvasive temperature estimation is one of key problems of high-intensity focused ultrasound (HIFU). In tissue, temperature changes, caused by HIFU, cause gray variation of the B-mode ultrasonic image, which can be used to estimate temperature. In this paper, the relation between temperature and the energy of real-valued Gabor transform of difference image is studied. In 2D real-valued discrete Gabor transform (RDGT), the information, which is response to the temperature, can be detached from the other information such as noise. It is advantageous to estimating temperature. The in-vitro fresh pork tissue is used in the experiments. Experimental results show the relation between temperature and energy of RDGT is approximately linearity, and noninvasive estimation based on RDGT has a high temperature resolution. The RDGT can be applied to estimate temperature.

Linearity

10.1109/icbbe.2007.223

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Citations (2)

[Feature detection of tissue lesion in HIFU based on SOM].

PubMed (2009)

Hongbo Chen Jingtian Tang Zhencheng Chen

Feature (linguistics)

Source

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Citations (0)

Lossless Compression of Medical Images based on the Differential Probability of Images

International Journal of Computers (2020)

Yao Cheng Shuchao Chen Jiawen Fu Shuai Ren Lizhi Liu

Lossless compression is crucial in the remote transmission of large-scale medical image and the retainment of complete medical diagnostic information. The lossless compression method of medical image based on differential probability of image is proposed in this study. The medical image with DICOM format was decorrelated by the differential method, and the difference matrix was optimally coded by the Huffman coding method to obtain the optimal compression effect. Experimental results obtained using the new method were compared with those using Lempel–Ziv–Welch, modified run–length encoding, and block–bit allocation methods to verify its effectiveness. For 2-D medical images, the lossless compression effect of the proposed method is the best when the object region is more than 20% of the image. For 3-D medical images, the proposed method has the highest compression ratio among the control methods. The proposed method can be directly used for lossless compression of DICOM images.

Lossy compression

Lossless JPEG

DICOM

10.46300/9108.2020.14.1

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Citations (2)

The repeated thermal shock behaviors of a ZrB2–SiC composite heated by electric resistance method

International Journal of Refractory Metals and Hard Materials (2010)

Songhe Meng Fei Qi Hongbo Chen Zhi Wang Guanghui Bai

Thermal shock

Maximum temperature

10.1016/j.ijrmhm.2010.06.012