نتایج جستجو برای: hmpao
تعداد نتایج: 530 فیلتر نتایج به سال:
UNLABELLED We conducted a study on humans to determine whether quantitative evaluation of blood-brain barrier (BBB) breakdown using the (99m)Tc-diethylenetriaminepentaacetic acid ((99m)Tc-DTPA) SPECT technique at the peak time of stroke evolution can predict neurologic outcome. METHODS Thirty consecutive patients with acute stroke of the middle cerebral artery occurring >24 h and <48 h before...
OBJECTIVES To evaluate the EEG changes during seizures in children with drug resistant focal epilepsy who demonstrate hypoperfusion at the "seizure focus" interictally, but no perfusion change during the seizure. METHODS Ictal EEG findings of six children with focal epilepsy who demonstrated hypoperfusion on rCBF SPECT after an interictal injection of (99)Tc(m) HMPAO concordant with the seizu...
UNLABELLED Imaging of osteomyelitis and soft-tissue infections can be problematic with currently available agents; bone scans are often false-positive. Indium-111-oxine and 99mTc-HMPAO white blood cell (WBC) scans require ex vivo handling of blood with potential exposure to infectious agents, and 99mTc-antigranulocyte (IgG1) antibodies need 24 hr for final diagnosis. METHODS We investigated t...
BACKGROUND AND PURPOSE Cerebral hyperperfusion syndrome has been increasingly reported as a complication of carotid angioplasty and stent placement. The aim of the present study was to determine significant predictors of hyperperfusion phenomenon after carotid angioplasty and stent placement. METHODS We retrospectively reviewed 30 consecutive patients with unilateral severe carotid stenosis w...
OBJECTIVE [(99m)Tc] D,L-hexamethyl-propyeneamine oxime ((99m)Tc-HMPAO), a brain perfusion tracer, suffers significant underestimation of regional cerebral blood flow (rCBF). Lassen et al. developed their linearization algorithm to correct the influence of back-diffusion of the tracer, and proposed their parameter α as 1.5. Based on mathematical modeling and literature review, recently, a new α ...
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