MRI apparatus

An MRI apparatus, comprising:

• a scanner that includes a static magnetic field magnet, a gradient coil, a whole body coil, and an RF transmitter;
• and
• processing circuitry configured to:
• set a first pulse sequence and a second pulse sequence, each of which is a fast spin echo (FSE) pulse sequence in which a plurality of refocusing pulses are applied subsequent to an application of an excitation pulse,
• wherein, in the first pulse sequence, a first gradient pulse that produces a motion probing gradient effect is applied along a readout direction between each of a plurality of refocusing pulses, and, in the second pulse sequence, a second gradient pulse being that produces the motion probing gradient effect and is different in pulse shape from the first gradient pulse is applied along the readout direction between each of the plurality of refocusing pulses, wherein:
• the scanner is configured to apply the first pulse sequence and the second pulse sequence to an object and acquire a plurality of first signals in the first pulse sequence and a plurality of second signals in the second pulse sequence, wherein the plurality of first signals have the motion probing gradient effect depending on the first pulse sequence and the plurality of second signals have the motion probing gradient effect depending on the second pulse sequence;
• and
• the processing circuitry is further configured to
• generate a plurality of first images from the plurality of first signals and a plurality of second images from the plurality of second signals, wherein the plurality of first images have different echo times from each other and the plurality of second images have different echo times from each other;
• and
• calculate a T2 value of a body fluid of the object from the plurality of first images and the plurality of second images in a manner that an influence of diffusion of the body fluid is removed from the T2 value by using an index related to diffusion of the body fluid.