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Figure 3 :Computed tomography perfusion in a patient with acute right middle cerebral artery stroke. Top left: Time-density curves from artery (used for deconvolution) and vein (used to scale maps). Calculated perfusion maps include cerebral blood fl ow, mean transit time and cerebral blood volume. There is decreased CBF, prolonged MTT and decreased CBV in the right MCA territory, consistent with acute ischemia. The area of low CBV is similar in size, i.e. matched, to the tissue where MTT is prolonged/CBF is reduced, consistent with a nonpenumbral pattern

Figure 3 :Computed tomography perfusion in a patient with acute right middle cerebral artery stroke. Top left: Time-density curves from artery (used for deconvolution) and vein (used to scale maps). Calculated perfusion maps include cerebral blood fl ow, mean transit time and cerebral blood volume. There is decreased CBF, prolonged MTT and decreased CBV in the right MCA territory, consistent with acute
ischemia. The area of low CBV is similar in size, i.e. matched, to the tissue where MTT is prolonged/CBF is reduced, consistent with a nonpenumbral pattern