SMALL ANIMAL RADIO-FREQUENCY COIL USED IN CLINICAL ULTRA-HIGH FIELD MAGNETIC RESONANCE IMAGING SYSTEM

摘要

A small animal radio-frequency coil used in a clinical ultra-high field magnetic resonance imaging system, consisting of a single-channel transmitting and receiving integrated antenna (1) and multiple receiving antennas (2). The multiple receiving antennas (2) form multiple channels. All the receiving antennas (2) are arranged in a circular array on the outer periphery of the transmitting and receiving integrated antenna (1) and geometrically overlap with the transmitting and receiving integrated antenna (1), and the radio-frequency decoupling between the antenna channels is enhanced by generated mutual inductance. The coverage area of the transmitting and receiving integrated antenna (1) is less than the sum of the coverage areas of all the receiving antennas (2), thereby achieving signal excitation in a small imaging area. The receiving antennas (2) have a parallel imaging function of a clinical magnetic resonance imaging system, thereby helping to shorten the scanning time and improve the image quality. The transmitting and receiving integrated antenna (1) and the receiving antennas (2) are each connected in series with a capacitor and connected to its respective preamplifier (3). The requirements for flexible coil placement for imaging of small animals of different sizes can be satisfied.