Comparison of Admission Perfusion Computed Tomography and Qualitative Diffusion- and Perfusion-Weighted Magnetic Resonance Imaging in Acute Stroke Patients

Abstract

An imaging technique may be helpful in the identification of cerebral penumbra in acute stroke patients and thus in the selection of patients for thrombolytic therapy. Perfusion CT and DWI/PWI are equivalent in this task.

Cortical Regional Hyperperfusion in Nonconvulsive Status Epilepticus Measured by Dynamic Brain Perfusion CT

“…12,24 In contrast, in stroke, the core of an infarction shows an rCBF reduction exceeding 80% compared with the other hemisphere, 30 and the defined threshold for a penumbra requires a minimal rCBF reduction of 34%. 31 Second, the distribution of focal perfusion changes differs between NCSE and stroke: Concordant with the concept of cortical generation of epileptic activity and with previous MR imaging and CBF-SPECT studies, 13,14 ictal hyperperfusion is predominantly present in the cortex and may encompass multiple vascular territories (Fig 3). 32,33 Acute stroke presenting with epileptic seizures or status epilepticus at onset has been reported, 34 but we did not encounter such etiologies in our series.…”

CT Angiography Clot Burden Score and Collateral Score: Correlation with Clinical and Radiologic Outcomes in Acute Middle Cerebral Artery Infarct

“…CT perfusion representation of initial infarct is limited to 8-cm coverage in this study; however, good correlation has been found between baseline CT and MR perfusion parameters and final infarct volume. 42,43 Furthermore, given the constraints on imaging and the lack of continuous arterial monitoring, the exact time of recanalization within 24 hours of presentation cannot be determined with certainty.…”

Imaging Evidence and Recommendations for Traumatic Brain Injury: Advanced Neuro- and Neurovascular Imaging Techniques

“…It affords real-time postprocessing, with a complete set of parametric maps typically generated within 5 minutes of completing data acquisition. 129,130 Perfusion CT can easily be performed as a complement to conventional noncontrast CT (NCCT) of the head and CT angiography (CTA) of the cerebral vasculature and does not interfere with the contrast-enhanced thoracoabdominal CT survey performed in patients with severe TBI. 116 Patients with severe TBI typically undergo contrast-enhanced chest, abdomen, and pelvis CT routinely to evaluate for aortic injuries.…”