Rf coil device of nuclear magnetic resonance imaging device

Abstract

Abstract PURPOSE:To use a small-sized detecting coil and to improve the catching ratio of signals and the SN ratio by synthesizing outputs from amny detecting coils arranged close to the periphery of a subject to receive a magnetic response from the subject. CONSTITUTION:A uniform static magnetic field H0 and an RF magnetic field Hrf are applied to a slice 41 to be tested in the vertical direction and a radial direction around the axis of the H0 respectively. Two pairs of exciting coils 51a, 51b and 52a, 52b are arranged rectangularly and properly used to excite the magnetic fields. On the other hand, outputs from respective coils 53 arranged close to the periphery of the subject 41 are inputted to a weighing factor unit 55 through a receiving amplifier 54. When the respective outputs are to be selectively used, weights to be applied to the respective outputs are varied by the factor unit 55, and when all the outputs are to be used uniformly, respective weights are uniformed. All outputs from the weighing factor unit 55 are uniformly added to an additional amplifier 56 and outputted as one signal.

Inventors

• 👤 Yasuto Takeuchi
• 👤 康人 竹内

Bibliographic Details