RESULTS In 12 of 16 patients investigated, focal reduction of 1231 activity by at least 10%
was found ipsilateral with the predominantly affected internal carotid artery. Fif teen patients …

To validate xenon-133 dynamic single photon emission tomography (SPECT) clinically, 74
patients were examined. Strictly unilateral cerebrovascular disease was confirmed in 47 …

HMPAO distribution was evaluated in 14 patients and 5 normal control subjects. Immediately
after 133XeSPECT, subjects received 22 ±4mCi" Tc-HMPAO, and images were acquired …

A consistent method for the qualitative analysis of regional cerebral blood flow on single-
photon emission computed tomography (SPECT) Imaging has not yet been realized …

Cerebral infarction is the result of cerebrovascular insufficiency and itself creates complex
changes in cerebral hemodynamics. To allow recognition of patterns of change in regional …

RESULTS Each of the three versions of the SPECT data was compared with the equivalent
PET image and the re suits are shown in Figures 2, 3, and 4. For each patient, two PET …

RESULTS The time taken to calculate one slice functional images by the present technique
was about 3 min when the inte gration interval was 1 sec. This calculation speed is about ten …

METHOD A scintillation camera with a 140-keV high-sensi tivity collimator was connected on-
line with the com puter. The latter system consisted of a central proc essing unitt with 24K …

In 53 patients with cerebrovascular disease (CVD), regional cerebral blood flow (CBF) and
blood volume (CBV) were imaged by SPECT within one session. Slice division (CBF: CBV) …

Cerebral infarct due to embolic stroke without recanalization was examined by cerebral
blood flow (CBF) SPECT in the early acute stage, and the possibility of predicting the size it …