MR imaging system for discriminating between imaged tissue types

摘要

A system provides B1- and B0-insensitive, blood flow and motion-robust T2-preparation and T2-preparation combined with inversion recovery. An MR imaging system discriminates between imaged tissue types based on transverse relaxation time (T2) or transverse relaxation time combined with longitudinal recovery time (T1). A signal generator generates a pulse sequence for T2 preparation or combined T2-preparation with inversion recovery comprising one or more B1 independent refocusing (BIREF-1) pulses for refocusing of magnetization of an anatomical region of interest being imaged, and different combinations of adiabatic or non-adiabatic tip-down and flip-back pulses. Multiple RF coils transmit RF pulses in response to the pulse sequence and acquire RF data in response to transmission of the RF pulses. A processing system processes the RF data to provide a display image indicating different tissue types with enhanced discrimination based on T2 relaxation time difference or combined T2 and T1 time difference.

主权项

1. An MR imaging system for discriminating between imaged tissue type based on transverse relaxation time (T2), comprising:
a signal generator for generating a pulse sequence for T2 preparation comprising at least one B1-independent refocusing (BIREF-1) pulse for refocusing of magnetization of an anatomical region of interest being imaged; a plurality of RF coils for transmitting RF pulses in response to said pulse sequence and acquiring RF data in response to transmission of the RF pulses; and a processing system for processing the RF data to provide a display image indicating different tissue types with enhanced discrimination based on T2 relaxation time difference.