[Study on the different field-of-view diffusion weighted imaging of the breast]

To compare the application value between reduced field-of-view diffusion weighted imaging (rFOV DWI) and single-shot echo-planar-imaging diffusion weighted imaging (SS-EPI DWI) of the breast.

78 cases (68 normal breast, 10 breast cancer) were canned with SS-EPI DWI (FOV 360 mm × 360 mm), rFOV DWI1 (FOV 360 mm × 180 mm) and rFOV DWI2 (FOV 280 mm × 140 mm). Image quality and ADC values of breast were compared with three groups. SNR were compared with rFOV DWI1 and rFOV DWI2.

The image quality score of 78 cases was 4.74 by rFOV DWI1, 3.59 by SS-EPI DWI and 3.55 by rFOV DWI2. The mean ADC value of 68 normal breast was 1.832 × 10⁻³ mm²/s by SS-EPI DWI, 1.701 × 10⁻³ mm²/s by rFOV DWI1 and 1.615 × 10⁻³ mm²/s by rFOV DWI2. The mean ADC value of 10 breast cancer was 1.345 × 10⁻³ mm²/s by SS-EPI DWI, 1.220 × 10⁻³ mm²/s by rFOV DWI1 and 1.149 × 10⁻³ mm²/s by rFOV DWI2.SNR of rFOV DWI1 images was much higher than FOV DWI2.

Sizeable rFOV DWI has higher resolution, less distortion than SS-EPI DWI, rFOV DWI will be useful in the diagnosis of the breast diseases.