Radiation change around astrocytoma
Resection and irradiation 8 years ago of a low grade astrocytoma.
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Stable left temporal resection cavity, containing blood products. Numerous SWI focal punctate regions of signal loss are in keeping with previous regional radiotherapy.
SWI is far more sensitive with the effects of radiotherapy and in this case the field irradiated can be visualised due to the development of microhaemorrhages.