Magnetic resonance imaging needing a long waiting time between pre-pulses and imaging pulse train

A scanning synchronization method of magnetic resonance imaging comprising:

• inputting a signal representing cardiac temporal phases of plural cardiac cycles of a subject to be imaged;
• applying a pre-pulse to the subject;
• performing scanning by applying an imaging pulse to a desired region of the subject after application of the pre-pulse;
• and
• controlling the pre-pulse using a specific waveform of a signal representing a cardiac temporal phase of a first cardiac cycle as a first trigger and controlling application of the imaging pulse using a specific waveform of a signal representing a cardiac temporal phase of a second cardiac cycle as a second trigger so as to make a time interval from the specific waveform representing the cardiac temporal phase of the second cardiac cycle to application of the imaging pulse a fixed value by changing a time interval from the pre-pulse to the imaging pulse so as to be reduced when the first cardiac cycle is larger than the second cardiac cycle and be enlarged when the first cardiac cycle is shorter than the second cardiac cycle, the second cardiac cycle being later than the first cardiac cycle by at least one cardiac cycle.

A computer-readable recording medium used for magnetic resonance imaging, said recording medium recording a program that causes a computer to perform:

• a function of inputting a signal representing cardiac temporal phases of plural cardiac cycles of a subject to be imaged;
• a function of applying a pre-pulse to be applied to the subject;
• a function of applying an imaging pulse to a desired region of the subject after application of the pre-pulse;
• and
• a function of controlling application of the pre-pulse using a specific waveform of a signal representing a cardiac temporal phase of a first cardiac cycle as a first trigger and controlling application of the imaging pulse using a specific waveform of a signal representing a cardiac temporal phase of a second cardiac cycle as a second trigger so as to make a time interval from the specific waveform representing the cardiac temporal phase of the second cardiac cycle to application of the imaging pulse a fixed value by changing a time interval from the pre-pulse to the imaging pulse so as to be reduced when the first cardiac cycle is larger than the second cardiac cycle and be enlarged when the first cardiac cycle is shorter than the second cardiac cycle, the second cardiac cycle being later than the first cardiac cycle by at least one cardiac cycle.

A magnetic resonance imaging apparatus comprising:

• an input unit configured to input a signal representing cardiac temporal phases of plural cardiac cycles of a subject to be imaged;
• a first detecting unit configured to detect a first timing on the basis of the signal;
• a pre-pulse applying unit configured to apply a pre-pulse to the subject in sync with the first timing with a first delay time by using a first trigger;
• a second detecting unit configured to detect a second timing on the basis of the signal, the second timing being at least one cardiac cycle later than the first timing;
• and
• a scanning unit configured to perform a scan by applying an imaging pulse to a desired region of the subject in sync with the second timing with a second delay time by using a second trigger making the second delay time a fixed value by changing a time interval from the pre-pulse to the imaging pulse so as to be reduced when the first cardiac cycle is larger than the second cardiac cycle and be enlarged when the first cardiac cycle is shorter than the second cardiac cycle.

A scanning synchronization method of magnetic resonance imaging comprising:

• inputting a signal representing cardiac temporal phases of plural cardiac cycles of a subject to be imaged;
• detecting a first timing on the basis of the signal;
• applying a pre-pulse to the subject in sync with the first timing with a first delay time by using a first trigger;
• subsequently detecting a second timing on the basis of the signal, the second timing being at least one cardiac cycle later than the first timing;
• and
• performing scanning by applying an imaging pulse to a desired region of the subject in sync with the second timing with a second delay time by using a second trigger making the second delay time constant by changing a time interval from the pre-pulse to the imaging pulse so as to be reduced when the first cardiac cycle is larger than the second cardiac cycle and be enlarged when the first cardiac cycle is shorter than the second cardiac cycle.