MRI Diagnosis of Uterine Leiomyoma / 实用放射学杂志

Objective To investigate the MRI features and the diagnostic value of uterine leiomyoma.Methods All cases were examinated by MRI and ultrasound.Retrospective analysis of MRI manifestations of 71 uterine leiomyomas in 32 patients in combination with the results of operation and pathology was carried out and was compared with ultrasound findings.Results The MRI features of the tumors were:intermediate or slightly low signal intensity on T 1WI and low signal intensity on T 2WI,patch hyperintense areas were seen in degenerated leiomyoma on T 2WI,there were clear margins in all tumors and capsules in most tumors(55/71).MRI was superior to sonography in showing 

Phased array coil and parallel imaging technology of MRI / 医疗卫生装备

The parallel imaging technology of MRI is the latest technique emerging in the last few years, which is based on the phased array coil. SMASH procedure operates by simultaneously acquiring linear combination signals with different spatial sensitivities from the phased array coils to reduce the phase encoding and shorten the imaging time. SENSE procedure operates by increasing the pace when sampling is performed in k-space, which proves a speedup by reducing the number of encoding steps. When the phased array coil designed, such problems have to be taken into account as resonant frequency, impedance match, mutual impedance and et al.