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Readout segmented echo planar imaging (readout segmentation of long variable echo-trains, RESOLVE) is a method of dividing the k-space in the readout direction and sampling signals from multiple shots. Compared to the conventional single-shot echo planar imaging, echo space is shortened by dividing, and distortion of images is reduced, but there is a disadvantage that the imaging time is increased. To shorten the imaging time, readout partial Fourier (RPF) method was developed. In this study, it is evaluated how the apparent diffusion coefficient (ADC) value and uniformity of images are affected by RPF. In addition, signal intensity, noise, and signal-to-noise ratio of diffusion-weighted imaging were evaluated as factors influencing the ADC value and uniformity of images, and the artifacts of images were observed. When the data acquisition ratio decreased due to the RPF, the ADC value increased and the uniformity of images decreased. We had better to find special indices for the ADC map when we use RPF.

The Influence of the Decrease in Data Acquisition Ratio Resulted from Readout Partial Fourier during Readout Segmented EPI on ADC Map: A Phantom Study