Temperature imaging method and system

Abstract

The invention relates to a temperature imaging method which comprises the steps of acquiring a wrapping phase image; carrying out difference on the wrapping phase image to obtain a phase difference image; extracting an original phase of a measurement region from the wrapping phase image and obtaining a reference phase according to the original phase and the phase difference image; and obtaining a temperature image of the measurement region according to a complex difference between the original phase and the reference phase. According to the temperature imaging method and the temperature imaging system, the phase difference image is obtained by carrying out difference on the wrapping phase image, and the two-dimensional phase unwrapping is avoided, so that the computation speed is greatly improved, and the requirement of temperature imaging on the real-time property is further met on the premise of not losing the accuracy.

Description

【Technical field】 [0001] The invention relates to magnetic resonance technology, in particular to a temperature imaging method and technology. 【Background technique】 [0002] Minimally invasive hyperthermia is more and more widely used in the treatment of benign and malignant solid tumors. Its mechanism is to use high-intensity focused ultrasound to instantly increase the temperature of tumor tissue to above 60°C, which in turn leads to tumor cell damage and tissue coagulation. necrosis. In the implementation of minimally invasive hyperthermia, it is necessary to heat to above 60°C to cause tumor cell necrosis, but the heating temperature must be controlled within 100°C, otherwise the tissue will be carbonized and difficult to metabolize and absorb. In order to ensure that the tumor cells are completely killed At the same time, normal cells are protected from or less damaged. Monitoring temperature imaging has become the basic guarantee for safe treatment. Magnetic resonanc...

AI Technical Summary

Problems solved by technology

However, phase warping is very common in phase maps. Unwrapping is the first step in reference-free temperature imaging based on proton resonance frequency shift. Each phase image needs to be unwrapped before temperature calculation. , and the unwinding calculation is quite time-consuming, which cannot meet the real-time requirements of temperature imaging. Especially in clinical applications, it is possible that normal cells will be damaged if the temperature is too high due to the inability to monitor the temperature in real time, and the therapeutic effect will also be affected. decrease accordingly

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