− | If toxoplasmosis of the brain is suspected, computed tomography (CT) or magnetic resonance imaging (MRI) of the brain is done. Less commonly, a piece of infected tissue is removed and examined under a microscope (biopsy) to identify parasites or characteristic proteins (antigens) released by the parasite. | + | If toxoplasmosis involving the CNS is suspected, CT and/or MRI may be used. One or more dense, rounded lesions may be seen. |