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STUDY DESIGN The adverse effects of lumbar myelography in 400 patients were analyzed. OBJECTIVES To determine whether adverse effects of lumbar myelography occur less frequently when using the fine needle technique. SUMMARY OF BACKGROUND DATA Lumbar myelography can be performed safely on an outpatient basis. The side effects may be reduced by using the(More)
BACKGROUND AND PURPOSE DCI is a serious complication following aneurysmal SAH and remains a leading cause of morbidity and mortality. Our aim was to evaluate CTP in aneurysmal SAH by using outcome measures of DCI. MATERIALS AND METHODS This was a retrospective study of consecutive patients with SAH enrolled in a prospective institutional review(More)
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)
RATIONALE AND OBJECTIVES Delayed cerebral ischemia (DCI) is a devastating condition that occurs secondary to aneurysmal subarachnoid hemorrhage (A-SAH). The purpose is to compare computed tomography perfusion (CTP) and digital subtraction angiography (DSA) for determining DCI in A-SAH. MATERIALS AND METHODS A retrospective study of A-SAH patients admitted(More)
BACKGROUND AND PURPOSE DCI is a serious complication following aneurysmal SAH leading to permanent neurologic deficits, infarction, and death. Our aim was to prospectively evaluate the diagnostic accuracy of CTP and to determine a quantitative threshold for DCI in aneurysmal SAH. MATERIALS AND METHODS Patients with SAH were prospectively enrolled in a(More)
  • Yan Zhang, Susan A Gauthier, +7 authors Yi Wang
  • Journal of magnetic resonance imaging : JMRI
  • 2016
PURPOSE To measure the longitudinal change in multiple sclerosis (MS) lesion susceptibility using quantitative susceptibility mapping (QSM). MATERIALS AND METHODS The study was approved by our Institutional Review Board. Longitudinal changes in quantitative susceptibility values of new enhanced-with-Gd MS lesions were measured at baseline magnetic(More)
PURPOSE To assess multiple sclerosis (MS) lesions at various ages by using quantitative susceptibility mapping (QSM) and conventional magnetic resonance (MR) imaging. MATERIALS AND METHODS Retrospectively selected were 32 clinically confirmed MS patients (nine men and 23 women; 39.3 years ± 10.9) who underwent two MR examinations (interval, 0.43 years ±(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)
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)