STEHNING, Christian,BÖRNERT, Peter,AMTHOR, Thomas, Erik,DONEVA, Mariya, Ivanova,SMINK, Jouke,KOUWENHOVEN, Marc
申请号：
EPEP2017/083917
公开号：
WO2018/115179A1
申请日:
2017.12.20
申请国别(地区):
EP
年份:
2018
代理人:
摘要：
The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (146) from a subject (118) from a region of interest (109) within an imaging zone (108). The magnetic resonance imaging system comprises a memory (134) for storing machine executable instructions (140) and pulse sequence commands (142). The pulse sequence commands are configured for controlling the magnetic resonance imaging system to perform magnetization preparation pulses which causes magnetization inversion within the region of interest and initiates a T1 relaxation process. The pulse sequence commands are configured for acquiring portions of the magnetic resonance data as discrete units during a rest and relaxation interval of a heart phase of the subject. The magnetic resonance imaging system further comprises a processor (130) for controlling the magnetic resonance imaging system. Execution of the machine executable instructions causes the processor to repeatedly: receive (202) an ECG signal (124) descriptive of the heart phase of the subject； detect (204) an onset of the rest and relaxation interval of the heart phase using the ECG signal； acquire (206) a portion (146) of the magnetic resonance data a predetermined delay after the onset of the rest and relaxation interval by controlling (200) the magnetic resonance imaging system with the pulse sequence commands, wherein the portion of the magnetic resonance data undersamples k-space； determine (208) an inversion delay (308, 502) for the portion of the magnetic resonance data using a timing of the magnetization preparation pulses and the onset of the rest and relaxation interval. Execution of the machine executable instructions further causes the processor to calculate a T1 map (150) of the region of interest using a maximum likelihood reconstruction that uses the magnetic resonance data and the inversion delay for each portion of the magnetic resonance data.La présente invention concerne un système d'i
