Anumber of techniques have been developed during the past four decades to evaluate
cerebral perfusion. The oldest used 133Xe, a lipophilic radioactive tracer that easily diffuses …

In this paper we propose a simple technique for assessing the positional accuracy of
digitized linear features. The approach relies on a comparison with a representation of higher …

The Massachusetts General Hospital Neuroradiology Division employed an experience and
evidence based approach to develop a neuroimaging algorithm to best select patients with …

Results: Tumor concentrationsof 18F-FDGdid not reach a
plateauwithinthe90mmofimaginginanyofthepre-treatment studies and only in one case post-treatment …

Background and Purpose— The goal of this study was to evaluate the utility of perfusion-weighted
CT (PWCT) in predicting final infarct volume and clinical outcome in patients with …

BACKGROUND: Four-dimensional computed tomography (4D-CT) provides both functional
and highly detailed anatomic information about parathyroid tumors. The purpose of this …

Purpose The purpose of this work was to evaluate the accuracy of CT angiography (CTA) for
the detection of large vessel intracranial thrombus in clinically suspected hyperacute (< 6 h) …

Estimates of slope and aspect are commonly made from digital elevation models (DEMs),
and are subject to the uncertainty present in such models. We show that errors in slope and …

PURPOSE: To assess the use of nonstandard, variable window width and level review settings
in computed tomography (CT) without contrast material administration in the detection of …

Cancer therapies using genes and other macromolecules might realize their full clinical
potential if they could be delivered to tumor tissue in optimal quantities. Unfortunately, the …