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Figure 4: Transverse MR images of left frontal region pathologically proved TDL in 40-year-old woman. Lesion was correctly classified because of enhancement and facilitated diffusion but no substantial elevation of perfusion. A, Fluid-attenuated inversion-recovery (10 000/120; inversion time, 2200 msec; field of view, 220 mm; matrix, 256 x 256; section thickness, 5 mm; intersection gap, 0 mm; number of signals acquired, two) and, B, contrast-enhanced T1-weighted spin-echo (600/11; field of view, 220 mm; matrix, 256 x 256; section thickness, 5 mm; intersection gap, 0 mm; number of signals acquired, one) transverse images demonstrate enhancing mass (*). C, Diffusion-weighted image and, D, ADC map (10 000/118; b values, 0 and 1000 sec/mm2) show facilitated diffusion where the lowest ADC obtained was 1.67 x 10–3 mm2/sec. E, Perfusion image (2000/75; field of view, 240 mm; section thickness, 5 mm; number of signals acquired, one) through mass (highest measured rCBV value = 1.57).
