Fig. 4

Brain Perfusion SPECT (123I-IMP). Preoperative SPECT (123I-IMP) revealed significant reduction in cerebral blood flow at rest and reactivity to acetazolamide, particularly in the left MCA territory (rest and acetazolamide). SPECT: single-photon emission computed tomography. 123I-IMP: N-isopropyl-p-[123I]iodoamphetamine