Background. The presence of a noise component on 3D images single-photon emission computed tomo­graphy (SPECT) brain significantly distorts the probability distribution function (PD) radioactive count rate in images. and further filtering data, based subjective assessment image quality, have significant impact calculation volumetric cerebral blood flow values uptake asymmetry radiopharmaceutica...

BACKGROUND AND PURPOSE Thrombolytic therapy was carried out on patients with acute ischemic stroke, and the risk of hemorrhagic transformation was evaluated from the residual cerebral blood flow (CBF) by pretherapeutic single-photon emission-computed tomography (SPECT). METHODS Local intra-arterial thrombolytic therapy was carried out using urokinase or recombinant tissue plasminogen activato...

Increased writing activity in a 70 year old, right handed man presenting with a history of alcohol misuse and maturity onset diabetes is reported. Brain CT disclosed corticosubcortical atrophy and 99mTc-HMPAO SPECT disclosed severe bilateral frontal hypoperfusion more prominent on the right. The patient's neuropsychological symptomatology consisted of severe (verbal) aspontaneity, intermittent ...

The encephalitis associated with antibodies (Ab) against the N-Methyl-D-Aspartate Receptor (NMDAR) was first discovered in 2007 [1]. Since then, there have been several reports on clinical features and diagnostic tools for better understanding the pathophysiology of this disease. Magnetic Resonance Imaging (MRI), Magnetic Resonance Spectroscopy (MRS), Electroencephalogram (EEG), Fluoro-2-DeoxyD...

BACKGROUND AND PURPOSE To detect areas of cerebral perfusion from bypass arteries after vascular reconstruction, we administered selective intraarterial microsphere tracer into the external carotid arteries and determined (via single-photon emission computed tomography [IA-SPECT]) whether the distribution of radiotracer matched the arteriographic distribution of contrast material as shown on ex...

Although patients suffering from major depression respond to antidepressant treatment within several weeks, full reinstatement of premorbid capabilities requires much longer. Nevertheless, most research in major depression seeking the pathophysiological correlates of remission has focused upon the acute post-treatment period. Brain imaging research offers no exception. We have recently shown th...