Journal
BRITISH JOURNAL OF RADIOLOGY
Volume 96, Issue 1148, Pages -Publisher
BRITISH INST RADIOLOGY
DOI: 10.1259/bjr.20220304
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To correctly identify intracranial hemorrhage (ICH) and distinguish it from other lesions, it is necessary to understand the imaging characteristics of ICH on susceptibility weighted imaging (SWI). It is a common misconception that blood appears as a black signal on SWI, but the appearance of ICH on SWI varies at different stages. Additionally, a low signal on SWI does not always indicate the presence of blood products. This review discusses and illustrates the appearance of ICH on SWI at all stages and common causes of a low signal on SWI.
To correctly recognize intracranial hemorrhage (ICH) and differentiate it from other lesions, knowledge of the imaging characteristics of an ICH on susceptibility weighted imaging (SWI) is essential. It is a common misconception that blood is always black on SWI, and it is important to realize that hemorrhage has a variable appearance in different stages on SWI. Furthermore, the presence of a low signal on SWI does not equal the presence of blood products. In this review, the appearance of ICH on SWI during all its stages and common other causes of a low signal on SWI are further discussed and illustrated.
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