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Figure 3. Removal of T2-weighted contrast. To remove the T2-weighted contrast in the isotropic transverse DW image (b = 1,000 sec/mm2; effective gradient, 14 mT/m; repetition time, 7,500 msec; minimum echo time; matrix, 128 x 128; field of view, 200 x 200 mm, section thickness, 6 mm with 1-mm gap), the transverse DW image (DWI) is divided by the transverse echo-planar spin-echo T2-weighted (EP SET2) image. The resultant image is called the exponential image because its signal intensity is exponentially related to the ADC.
