نتایج جستجو برای: inversion recovery
تعداد نتایج: 241145 فیلتر نتایج به سال:
Improved Method for Assessing Myocardial Infarction in Rodents at 9.4T using Delayed Enhancement-MRI
Introduction: MRI is becoming a widely used tool in cardiovascular research involving small animals, and is regarded as the gold standard for assessing many functional parameters, such as ejection fraction. However, the assessment of myocardial infarction by delayed enhancement (DE) using gadolinium contrast agents, has not seen as widespread use in small animal research, and studies have prima...
Introduction: Vascular-space-occupancy (VASO) MRI (1) produces cerebral blood volume (CBV)-weighted images by employing inversion recovery to null the blood signal. Depending on the TR used, the residual magnetization in tissue, however, is only about 10-20% of the equilibrium signal intensity at the time of inversion (TI), which yields a relatively low signal-to-noise ratio (SNR). It has been ...
BACKGROUND AND PURPOSE The use of a high-resolution T2-weighted MR sequence, which suppresses signal from both fat and water, has been shown to be highly effective for depicting areas of inflammatory damage within the optic nerve. The ability of this sequence to show neoplastic and inflammatory orbital lesions, which may mimic neuritis, is unknown. This study was designed to examine the charact...
BACKGROUND Imaging is used as a surrogate for clinical outcome in early-phase stroke trials. Assessment of infarct growth earlier than the standard 90 days used for clinical end points may be equally accurate and more practical. OBJECTIVE To compare assessment of the effect of reperfusion therapies using 24-hour vs day 90 magnetic resonance imaging. DESIGN Infarct volume was assessed on dif...
BACKGROUND AND PURPOSE Our aim was to explore whether the mismatch in lesion visibility between b1000 and b0 images is an alternative to mismatch between diffusion-weighted imaging and fluid-attenuated inversion recovery imaging as a surrogate marker of stroke age. METHODS We analyzed patients from the European multicenter I-KNOW database. Independent readers assessed the visibility of ischem...
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