Fast nonlinear regression method for CT brain perfusion analysis

CLINICAL REPORT BRAIN CT Perfusion for Confirmation of Brain Death

SUMMARY: For pronouncing brain death, unlike CTP, the 2-phase CTA gives no functional information and is limited by inadvertent delay of the second acquisition, which may give false-negative results. The purpose of our study was to compare CTP and CTA derived from the CTP data with the Dupas and Frampas criteria for confirmation of brain death. A retrospective review of CTP in 11 consecutive pa...

Influence of Thin Slice Reconstruction on CT Brain Perfusion Analysis

OBJECTIVES Although CT scanners generally allow dynamic acquisition of thin slices (1 mm), thick slice (≥5 mm) reconstruction is commonly used for stroke imaging to reduce data, processing time, and noise level. Thin slice CT perfusion (CTP) reconstruction may suffer less from partial volume effects, and thus yield more accurate quantitative results with increased resolution. Before thin slice ...

Brain CT perfusion in stroke in progression.

acute CT brain scan revealed subtle hypodensity of the left MCA territory with narrowing of the proximal MCA on CT angiography ( fig. 1 a). Due to symptom regression during the next 30 min and the unknown time of symptom onset, aspirin was given but not thrombolysis. The next morning she had minimal dysphasia and central facial paresis only (NIHSS score 2). However, her symptoms were fluctuatin...

Diagnosing brain death by CT perfusion and multislice CT angiography.

INTRODUCTION Although the diagnosis of brain death (BD) is usually based on clinical criteria, in sedated patients, ancillary techniques are needed. This study was designed to assess the accuracy of cerebral multislice computed tomographic angiography (CTA) and CT perfusion (CTP) in diagnosing BD. METHODS Prospective observational study in 27 BD patients. RESULTS All patients were diagnosed...

Homotopy Analysis Sumudu Transform Method for Nonlinear Equations