精彩PPT（029）：颅内DWI高信号病变：从发现病灶到准确诊断

Bright Lesions on Diffusion-weighted MR Images: From the Recognition of Lesions to a Specific Diagnosis

Departments of Radiology at

1)The University of Tokyo

2)International University for Health and Welfare Mita Hospital

3)The University of Tokyo Hospital

Akira Kunimatsu, MD, PhD1)Natsuko Kunimatsu, MD, PhD2)Kouhei Kamiya, MD, PhD3)Masaki Katsura, MD, PhD3)Harushi Mori, MD, PhD1)Osamu Abe, MD, PhD1)

Take Home Messages

1. High signal on DWI can be caused by diffusion restriction, T2 elongation and both, with variable predominance among diseases. 

2. Some diseases are characterized by distribution and morphology of the bright lesions on DW images.

3. Recognizing the pattern on DW images and evaluating the background mechanism for high signal could reasonably narrow down differential diagnosis and would help you make a specific diagnosis.