Pulmonary artery vasomotion is considered to be a factor affecting blood flow through the lungs despite the fact that direct confirmation of pulmonary vascular motion has been difficult to obtain. Indirect evidence has been presented by physiologists using mathematical techniques, involving pressure differences and flow rates. A more direct approach to the study of pulmonary vasomotion would be...

OBJECTIVES Takayasu's arteritis (TA) is a rare disease, in which early diagnosis and assessment of treatment efficacy remain a problem. Signs and symptoms may be non-specific and conventional blood tests unreliable, with vascular inflammation often persisting in the face of a normal acute phase response. The current "gold standard" investigation, x ray angiography, is invasive and only identifi...

Arteriosclerosis a widespread disease of the arteries. It is a kind of arteriosclerosis that causes coronary artery disease (CAD) in the form stenosis that is narrow downing of arteries. The X-ray angiography images suffer from background artefacts which obscure the visualization of the image to identify the stenosis. The artefacts must be eliminated to have an improved visualization of the blo...

Introduction The incidence of neurotoxic events due to intravascular application of iodinated x-ray contrast media (CM) has decreased markedly since the introduction of nonionic CM [1]. Severe neurotoxic complications are accompanied by disruption of the blood-brain barrier and CM extravasation [1–6]. Coronary angiography involving only nonionic CM has been reported to cause transient cortical ...

Ritman EL, Johnson SA, Sturm RE, Wood EH: The television camera in dynamic video angiography Three characteristics of conventional television cameras—image integration and storage, interlaced scanning, and image retention—make these cameras unsuitable for dynamic angiography. Use of noninterlaced scanning and synchronized 60/sec pulsed operation of the x-ray source avoids degradation of tempora...

BACKGROUND AND PURPOSE Blood flow in an intracranial stent cannot be visualized with 3D time-of-flight MR angiography owing to magnetic susceptibility and radiofrequency shielding. As a novel follow-up tool after stent-assisted coil embolization, we applied MRA by using a Silent Scan algorithm that contains an ultrashort TE combined with an arterial spin-labeling technique (Silent MRA). The pur...

BACKGROUND Diagnostic imaging among Medicare beneficiaries is an important contributor to rising health care costs. We examined temporal trends and geographic variation in the use of carotid ultrasound, carotid magnetic resonance angiography (MRA), and carotid x-ray angiography. METHODS AND RESULTS Analysis of a 5% national sample of claims from the Centers for Medicare and Medicaid Services ...

Digital subtracted angiography (DSA) remains the gold standard for diagnosis of cerebral vascular diseases and provides intraprocedural guidance. This practice involves extensive usage of x-ray and iodinated contrast medium, which can induce side effects. In this study, we examined the accuracy of 3-dimensional (3D) registration of magnetic resonance angiography (MRA) and DSA imaging for cerebr...

results the degree of systolic compression was found to be correlated with the depth of the mb. however, there was no correlation between the length of the mb and the degree of systolic compression. conclusion the systolic compression of the mb was influenced by the depth of the tunneled segment, not by its length. background myocardial bridging (mb) is a congenital anomaly in which a segment o...