Nmr image diagnosing apparatus

Abstract

Abstract PURPOSE:To enable the diagnosing of a practical NMR image with a high resolution without using any ferromagnetic field by providing a quadratic differential type magnetic flux detection coil for detecting a nuclear magnetic resonator (NMR) and a DC SQUID fluxmeter to which the detection signal is applied from this detection coil. CONSTITUTION:An NMR signal in the direction X from an object is detected with a quadratic differential type magnetic flux coil 4 but the sum of a magnetostatic field and a gradient magnetic field, and an excitation field are not detected because they are in the direction Z and Y respectively. Leakage fluxes from coils 2 for gradient magnetic field has a component in the direction X but can be cancelled therebetween by arranging the quadratic differential type magnetic flux detection coil 4 in the center of the coils 2 for gradient magnetic field. Extraneous noise magnetic fields, line noises and variations in earth magnetism can be cancelled by the quadratic differential balance while being damped by a filter effect with resistance 6 since these are of a low frequency.

Inventors

• 👤 Seiichi Naito
• 👤 内藤　誠一
• 👤 Yasushi Tono
• 👤 靖 東野

Bibliographic Details