Ultrasonic temperature measuring bi-value image fuzzy tracing method

A binary image and ultrasound technology, applied in the field of medical imaging, can solve the problems of error accumulation, large amount of calculation, and low precision

Inactive Publication Date: 2006-03-22
TSINGHUA UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low accuracy of cross-correlation method in ultrasonic non-destructive temperature measurement, errors will accumulate, and the problem of large amount of calculation

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  • Ultrasonic temperature measuring bi-value image fuzzy tracing method
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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0036] Such as figure 1 As shown, the ultrasonic temperature measurement binary image fuzzy tracking method firstly uses the ultrasonic probe in the ultrasonic thermometer to transmit ultrasonic pulses, and receives the returned ultrasonic echoes after being fed back by human biological tissues. It is characterized in that the method also includes the following steps:

[0037] 1) The sampling frequency of the ultrasonic thermometer is N times the center frequency of the ultrasonic pulse emitted by the ultrasonic probe, where N≥8, where N is 8, and the size of the tracking window is set dx×dy accordingly, and the dx direction is the intra-frame direction. dx takes N / 2~N, so that each tracking window will not overlap in the dx direction, which can prevent some misjudgments and minimize the influence of noise. Here, dx takes 7. The dy direction is the i...

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Abstract

The invention discloses a fuzzy tracking method for binary images of ultrasonic temperature measurement, which belongs to the technical field of medical imaging. In order to solve the problems of low precision of cross-correlation method in ultrasonic non-destructive temperature measurement, errors will accumulate, and large amount of calculation, the present invention discloses a fuzzy tracking method of binary image of ultrasonic temperature measurement. The probe emits ultrasonic pulses, receives the returned ultrasonic echoes after being fed back by human biological tissues, and performs binary processing on the data of each frame of ultrasonic echoes to obtain a binary image containing peak and valley feature points; The value image is traversed and tracked to obtain the accumulated time-shift value of the ultrasonic echo; finally, the curve fitting is performed on the accumulated time-shift value, and the local time-shift is obtained after the difference. The method of the invention is a real-time method, the precision can reach 1 / 4 wavelength, the error will not accumulate, and the amount of calculation is greatly reduced, which is better than the cross-correlation method.

Description

technical field [0001] The invention belongs to the technical field of medical imaging. Background technique [0002] At present, in many aspects of the medical field, people urgently need to realize the non-destructive measurement of the internal temperature of the human body, such as ultrasonic focusing, ultra-low temperature freezing tumor treatment, whole body perfusion hyperthermia, etc. Moreover, even the routine non-destructive monitoring of deep body temperature will make a significant contribution to the existing medical diagnostic technology. [0003] Since ultrasonic imaging technology has been quite successfully applied in clinical practice, ultrasonic non-destructive temperature measurement has been placed with great expectations. In ultrasonic nondestructive temperature measurement technology, the most important model is the time-lapse model based on biological discrete random media. The ultrasound time-shift model is based on detecting the time-shift of echo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/01A61B8/00G01S15/00G06T1/00
Inventor 周兆英徐海东张毓笠
Owner TSINGHUA UNIV
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