BACKGROUND AND PURPOSE Neuroradiology has become an increasingly diverse and subspecialized discipline. We evaluated the current status and trends affecting fellowship programs and the practice of clinical neuroradiology at academic medical centers, with emphasis on invasive procedures. METHODS All 85 program directors at Accreditation Council for Graduate Medical Education-approved fellowshi...

2. Transient Probability Distributions of Nerve Impulse Intervals, S. B. Thesis, Department of Physics, M.I. T., June 1964. The time evolution of the distribution of nerve-impulse intervals was examined by measuring histograms at varying times in the stimulus cycle. The distribution width was found to vary inversely as the stimulus strength. There is an indication that the width also depends up...

T he year 2007 brought further understanding of the risk for subgroups of patients undergoing carotid artery stenting (CAS). For symptomatic patients, both increasing age and treatment within 2 weeks of neurological symptoms were associated with increased risk of perioperative stroke or death. 1 Unfavorable anatomic factors for CAS among octo-genarians included aortic arch elongation, calcifica...

Depths of novel imaging biomarkers are now available for evaluating biological response to new therapies in CNS tumors. The current course will briefly outline the current Response Assessment in Neuro-Oncology (RANO) criteria, including limitations when implementing in multicenter trials. The use of digital T1 subtraction maps as a method for measuring enhancing tumor volume in the presence of ...

Different angiographic techniques (e.g., multiple oblique views, angiotomography, and magnification angiography) have been proposed to improve the diagnosis of cerebral vascular malformations and occlusive diseases. However, these methods are either time-consuming or necessitate repeated injections of contrast medium. The common goals of all these techniques are (1) to achieve a documentation o...