一种简单的MR兼容测温装置

波谱学杂志 ›› 2010, Vol. 27 ›› Issue (2): 157-162.

一种简单的MR兼容测温装置

宁瑞鹏, 朱岩, 李鲠颖

上海市磁共振重点实验室，华东师范大学物理系，上海 200062

收稿日期:2009-10-20 修回日期:2009-11-10 出版日期:2010-06-05 发布日期:2010-06-05
基金资助:
上海市科委资助项目(08DZ1900702，07DZ19506).

A Simple MR-Compatible Thermometer: Design and Applications

NING Rui-Peng, ZHU Yan, LI Geng-Ying

Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China

Received:2009-10-20 Revised:2009-11-10 Online:2010-06-05 Published:2010-06-05
Supported by:
上海市科委资助项目(08DZ1900702，07DZ19506).

摘要/Abstract

摘要：

在微创热疗中，活体测温是十分关键的技术. MRI图像除了具有无创伤、分辨率高、组织对比度高、多角度成像等优点外，还可以在治疗过程中及时反映组织温度信息，非常适用于热疗中对组织温度进行监控. 目前，低场MRI测温还处于初步研究阶段. 为了对低场MRI测温效果进行定量研究，需要一种具有MR兼容性的测温装置. 为此，本文提出了一种简单的MR兼容测温装置的设计方案. 该方案以通用热电偶和电子温度计为核心，具有成本低，易实现的特点. 所设计的测温装置在79 ℃～39 ℃范围内的测温精度为0.5 ℃，工作时对MRI图像质量无明显影响，操作简单，读数方便，适用于对MRI测温效果进行定量研究.

关键词: 磁共振（MR）, 磁共振温度成像, 测温装置, 磁共振兼容

Abstract:

Thermometry in vivo is one of the most important techniques in minimally invasive thermotherapy. Magnetic resonance imaging is ideal for thermometry measurement in vivo since it has advantageous features such as non-invasiveness, high spatial resolution, good softtissue contrast, three-dimensional imaging capability, and intra-operative temperature assessment capacity. However, it is essential to validate and calibrate MRI-based thermometry with independent measurement made by MR-compatible thermometers. In this paper, we present the design and applications of a MR-compatible thermometer, which is simple to implement and has a low cost. The thermometer consists of a general thermocouple and an electronic thermometry device, and has an accuracy about ±0.5 ℃ at the temperature range from 39 ℃ to 79 ℃. Experimental results showed that there was no significant quality degradation to the MR images while the thermometer being in operation. The MR-compatible thermometer proposed is especially suitable for use in combination with low-field MRI-based thermometry.

Key words: magnetic resonance imaging, temperature imaging, thermometry, MR-compatible

中图分类号:

R445.2

宁瑞鹏, 朱岩, 李鲠颖. 一种简单的MR兼容测温装置[J]. 波谱学杂志, 2010, 27(2): 157-162.

NING Rui-Peng, ZHU Yan, LI Geng-Ying. A Simple MR-Compatible Thermometer: Design and Applications[J]. Chinese Journal of Magnetic Resonance, 2010, 27(2): 157-162.

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