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BACKGROUND AND PURPOSE In recent years, the role of CTA and CTP for vasospasm diagnosis in the setting of ASAH has been the subject of many research studies. The purpose of this study was to perform a meta-analysis of the diagnostic performance of CTA and CTP for vasospasm in patients with ASAH by using DSA as the criterion standard. MATERIALS AND METHODS(More)
BACKGROUND Neuroform stent-assisted coil embolization facilitates the endovascular treatment of wide-necked intracranial aneurysms. However, the safety and efficacy of its long-term use have not been fully elucidated. OBJECTIVE To retrospectively examine the long-term results of Neuroform stent usage in conjunction with coil embolization in wide-necked(More)
Human embryonic stem (hES) cells provide a potentially unlimited cell source for regenerative medicine. Recently, differentiation strategies were developed to direct hES cells towards neural fates in vitro. However, the interaction of hES cell progeny with the adult brain environment remains unexplored. Here we report that hES cell-derived neural precursors(More)
The aim of this study is to evaluate computed tomography perfusion (CTP) during admission baseline period (days 0–3) in aneurysmal subarachnoid hemorrhage (A-SAH) for development of vasospasm. Retrospective analysis was performed on A-SAH patients from Dec 2004 to Feb 2007 with CTP on days 0–3. Cerebral blood flow (CBF), cerebral blood volume (CBV), and(More)
BACKGROUND The cellular basis of long term radiation damage in the brain is not fully understood. METHODS AND FINDINGS We administered a dose of 25Gy to adult rat brains while shielding the olfactory bulbs. Quantitative analyses were serially performed on different brain regions over 15 months. Our data reveal an immediate and permanent suppression of SVZ(More)
BACKGROUND AND PURPOSE There is a desire within many institutions to reduce the radiation dose in CTP examinations. The purpose of this study was to simulate dose reduction through the addition of noise in brain CT perfusion examinations and to determine the subsequent effects on quality and quantitative interpretation. MATERIALS AND METHODS A total of 22(More)
This 65-year-old man presented to the authors' institution reporting neck swelling. Stage IIIA Hodgkin disease was diagnosed, and a computed tomography scan of the neck revealed a vertebrobasilar artery aneurysm. His medical history was significant for subarachnoid hemorrhage and coma 2 years earlier. Subsequent digital subtraction angiography demonstrated(More)
RATIONALE AND OBJECTIVES The purpose of our study is to perform an internal validation of a new reference standard for vasospasm diagnosis in aneurysmal subarachnoid hemorrhage (A-SAH) patients. MATERIALS AND METHODS A retrospective study was performed on A-SAH patients between January 2002 and May 2009. All patients were applied to this new reference(More)
RATIONALE AND OBJECTIVES Patient-centered care has become a primary focus in clinical practice. In developing practice guidelines for clinical care, the patients' perspective is an important component. MATERIALS AND METHODS Patients' preferences are represented in a decision analytic model as quality-of-life weights for different health states associated(More)
The current role of CT perfusion (CTP) imaging in the diagnosis and treatment of vasospasm in the setting of aneurysmal subarachnoid hemorrhage is discussed in this article, with specific attention directed towards defining the terminology of vasospasm and delayed cerebral ischemia. A commonly used CTP technique in clinical practice is described. A review(More)