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FIG 5. Mean volume of the lesions from initial b = 1000, b = 2000, and follow-up b = 2000 images. As the b value increases, the mean volume of the lesion increases by 47% (22.1 ± 27.9 mL on b = 1000 image versus 32.5 ± 36.5 mL on b = 2000 image, P < .001, n = 34). The mean volume of the lesion measured on follow-up b = 2000 images (52.3 ± 61.6 mL) is significantly larger than those of the initial trace images of b = 1000 or 2000 because of progression or edematous swelling of the infarction in most of the patients.
