The present invention provides a magnetic resonance imaging system 100 that acquires magnetic resonance data 146 from interest area 109 in imaging zone 108 from subject 118.The magnetic resonance imaging system comprises a memory 134 storing a machine executable instruction 140 and a pulse sequence command 142.The pulse sequence command is configured to control the magnetic resonance imaging system to perform magnetization generation pulses that cause magnetization reversal within the interest area to initiate the T1 relaxation process.The pulse sequence command is configured to acquire a plurality of portions of the magnetic resonance data as individual units in the resting and relaxing periods of the cardiac phases of the subject.The magnetic resonance imaging system further comprises a processor 130 for controlling a magnetic resonance imaging system.By executing a machine executable instructionProcessorReceive an ECG signal 124 representing the heart's heart (202) andUsing ECG signalsDetecting the onset of rest and relaxation periods of cardiac phases (204) andAfter the start of rest and relaxation periodsBy controlling the magnetic resonance imaging system using a pulse sequence commandObtaining part 146 of the magnetic resonance data at a predetermined delay (206)；Magnetic resonance dataUndersampling K spaceObtainingThe magnetization generation pulse and the timing of the onset of the rest and relaxation periods are usedInversion delay 308 for part of magnetic resonance dataDetermining 502 (208)Repeat.By performing the machine executable instructions, the processor further computes the TL map 150 of the region of interest using the maximum likelihood reconstruction utilizing the inversion delay for each portion of the magnetic resonance data and magnetic resonance data.本発明は、対象者１１８からであって、イメージングゾーン１０８内の関心領域１０９からの、磁気共鳴データ１４６を取得する磁気共鳴イメージングシステム１００を提供する。磁気共鳴イメージングシステムは、マシン実行可能命令１４０及びパルスシーケンスコマンド１４２を格納するメモリ１３４を備える。パルスシーケンスコマンドは、関心領域内で磁化反転を引き起こしてＴ１緩和プロセスを開始させる、磁化生成パル
