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在临床装置上,测量人脑磁场比起实验室研究通常所采用的仪器需要有更好的性能.这里我们介绍准备作为神经磁的临床应用以及更广泛的生物磁研究的装置的一些重大进展;报道一种闭循环致冷机的研制情况,这种致冷机能提供以SQUID为基础的传感器所需要的低温条件,同时又不会引起噪声水平的严重增高.闭循环致冷机无需使用液体致冷剂,因而允许传感器在不同方向上进行操作,即使倒过来向下也行.然后对一种用作神经磁研究的新型磁屏蔽室的性能作出评估,这种屏蔽式的优点是可以预制和提供一个便于临床研究的较大的内部空间.磁屏蔽室的天花板上装有一台万向吊机,吊机下方装有一套或两套磁传感器。当用一个磁性系统来精确测定传感器相对于病人头部的位置时,这个装置可以精确决定出脑内神经源的位置。最后,介绍了目前藉助于神经磁测量正在开展的几种临床研究中的一个例子。
In clinical settings, measuring the human brain’s magnetic field requires better performance than the instrumentation commonly used in laboratory research, and here we present some major advances in the clinical application of neuromagnetic as well as in more extensive biomagnetic studies. Reported the development of a closed-cycle cooler that provides the low-temperature conditions required for SQUID-based sensors without causing a significant increase in noise levels. The closed cycle cooler requires no liquid to be used The refrigerant thus allows the sensor to be operated in different directions even if it is inverted downwards.An evaluation of the performance of a new type of magnetically shielded chamber used for neuromagnetic studies is also available, Provides a larger interior space for clinical research Convenience of a magnetically suspended cage with a universal crane on the ceiling and one or two magnetic sensors beneath the crane. When a magnetic system is used to accurately determine the position of the sensor relative to the patient’s head, this device accurately determines the location of the brain’s neural source. Finally, an example of several clinical studies currently underway with the help of neuromagnetic measurements is presented.