抄録
Basic MRI techniques for diagnosis of silent brain infarcts are discussed. Advantages and disadvantages of various basic MR techniques including T1WI, T2WI, FLAIR and PDWI are also evaluated. The use of FLAIR and PDWI is especially suited to differentiate ischemic lesions from CSF-containing spaces such as ventricular system and cerebral sulci. However, surprisingly little is known about the disadvantages of FLAIR. Precise differentiation between complete and incomplete infarct are sometimes difficult on FLAIR especially at the short repetition time. The use of PDWI is suited to this occasion. In conclusion, most useful basic MR imagings for evaluation of silent brain infarcts and white matter lesions are T1WI, T2WI and PDWI. Silent lacunar hemorrhages can be well appreciated on T2 -weighted sequences like gradient-echo.
