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Transverse relaxation time measuring method and system

A technology of time measurement and transverse relaxation, which is applied in the field of biomedicine, can solve problems such as dependence and weight changes, and achieve the effect of optimizing signal-to-noise ratio and improving accuracy

Active Publication Date: 2011-07-06
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

[0003] In actual clinical applications, various weighted images, such as relaxation time-weighted images, are usually collected directly, and various diseases are diagnosed based on the relaxation time-weighted images. However, this diagnosis method depends largely on doctor's experience
In the process of generating weighted images, since the weights of each parameter are different, and the weights will change with many factors, even the weighted images can be obtained by mixing weights, so even experienced doctors will inevitably misidentify

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  • Transverse relaxation time measuring method and system

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Embodiment Construction

[0026] figure 1 The flow of the method for measuring the transverse relaxation time in one embodiment is shown, including the following steps:

[0027] In step S10, echo signals are acquired. In this embodiment, the step of acquiring echo signals is acquiring echo signals through a magnetic resonance pulse sequence. The echo signals of the entire imaging region are obtained, but in order to reduce the calculation amount in the subsequent fitting process, only the echo signals in the region of interest are calculated.

[0028] For example, a multi-echo SE sequence (spin-echo pulse sequence) can be used to perform a transect scan to obtain an echo signal, so as to fit the echo signal.

[0029] In step S30, the echo signal is fitted and calculated to obtain a priori estimate of the relaxation time. In this embodiment, the intercepted echo signal is roughly estimated, and the prior estimation of the relaxation time is obtained through fitting. Specifically, the prior estimatio...

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Abstract

The invention provides a transverse relaxation time measuring method. The method comprises the following steps of: acquiring an echo signal; fitting the echo signal to acquire a prior estimate value of the relaxation time; and calculating echo time interval according to the prior estimate value, and feeding the echo time interval to the fitting calculation to acquire a measurement value of the relaxation time. Through rough estimation on the relaxation by the fitting calculation, the transverse relaxation time measuring method and system realize optimization on the signal to noise ratio of the relaxation time in the echo signal, so that the accuracy of relaxation time measurement is effectively improved.

Description

【Technical field】 [0001] The invention relates to biomedical technology, in particular to a method and system for measuring transverse relaxation time. 【Background technique】 [0002] MRI (Magnetic Resonance Imaging, Magnetic Resonance Imaging) technology has been widely recognized and applied due to its very high resolution, measurement of various parameters of the human body, and early diagnosis and evaluation of tumors using relaxation time weighting. Relaxation time is the most fundamental contrast mechanism in magnetic resonance imaging. The characteristics of relaxation time can be used to distinguish, segment and classify tissues, thereby improving the detection and monitoring of diseases. [0003] In actual clinical applications, various weighted images, such as relaxation time-weighted images, are usually collected directly, and various diseases are diagnosed based on the relaxation time-weighted images. However, this diagnosis method depends largely on Doctor's e...

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Application Information

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IPC IPC(8): G01R33/50
Inventor 戴睿彬潘艳丽刘新郑海荣吴垠
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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