Background Contrast-enhanced MR angiography (CE-MRA) has evolved into a reliable imaging technique for peripheral arterial occlusive disease (PAOD). Recent advances in MRI technology offer large homogeneous magnetic fields with comparable Field-of-Views at 3T and 1.5T, allowing visualization of the complete runoff vascular tree by single-injection 3-station (pelvic/thigh/calf) moving-table CE-M...

PURPOSE Although time-of-flight (TOF)-magnetic resonance angiography (MRA) can clearly depict intracranial arteries, the arterial flow of middle cerebral artery (MCA) is occasionally not detected. We evaluated this phenomenon with reference to cerebrovascular dynamics. MATERIALS AND METHODS Seventeen patients with suspected occlusion of MCA or internal carotid artery on TOF-MRA were enrolled....

OBJECTIVE To compare magnetic resonance angiography (MRA) with Intra-arterial digital subtraction angiography (IA-DSA) in detection and characterization of intracranial aneurysms. STUDY DESIGN Comparative cross-sectional study. PLACE AND DURATION OF STUDY Department of Diagnostic Imaging, Lahore General Hospital, Lahore, from January to June 2007. METHODOLOGY Thirty patients presented wit...

Introduction: Acute pulmonary thromboembolic disease is a significant cause of morbidity and mortality, with estimated yearly incidence of 650,000 cases in the USA. Pulmonary computed tomography angiography (CTA) is the current gold standard for PE diagnosis. However CTA has limitations regarding the use of iodinated contrast and relatively high ionizing radiation burdens, a consideration given...

Gadolinium(Gd)-enhanced three-dimensional (3D) magnetic resonance angiography (MRA) is a newer technique that provides high resolution data rapidly for depiction of both arteries and veins throughout the body.1 Improvements in gradient technology now allow an entire volume of 3D-Gd-enhanced MRA to be performed at 4 second intervals. It is now possible to acquire several volumes of high temporal...

STUDY OBJECTIVE To review the published experience with gadolinium-enhanced magnetic resonance angiography (MRA) for the detection of acute pulmonary embolism (PE) in order to test the hypothesis that gadolinium-enhanced MRA may be potentially sensitive and specific enough to include it among diagnostic alternatives in the evaluation of patients with suspected PE. METHODS Studies were identif...

OBJECTIVE In patients with hereditary hemorrhagic telangiectasia (HHT), pulmonary arteriovenous malformations (PAVMs) can cause serious neurological complications. Our aim was to evaluate the potential of contrast-enhanced Doppler ultrasound (CE-US) of the common carotid artery as a screening test for detection of PAVMs. METHODS A total of 124 consecutive patients with HHT or a positive famil...

Coronary multislice computed tomography (MSCT) angiography and magnetic resonance angiography (MRA) have emerged as new diagnostic techniques that allow direct visualization of the coronary artery. These new modalities have both advantages and disadvantages concerning radiation exposure, the use of contrast medium, ability of visualizing heavily calcified artery lumens, and spatial and temporal...

BACKGROUND Renal artery stenosis is one of the important causes of hypertension and end stage renal failure. Magnetic resonance angiography (MRA) and Doppler ultrasonography are non-invasive and safe diagnostic techniques that have also high sensitivity and specificity. Since the accuracy and reliability of these techniques depend upon technicians and softwares, we decided to evaluate and compa...

BACKGROUND The breathhold contrast-enhanced three-dimensional magnetic resonance angiography (MRA) using T1-weighted gradient-echo imaging sequence is the standard technique for MRA of the thorax. However, this technique is not desirable for certain patients with respiratory insufficiency, serious renal impairment, or allergy to contrast agents. The objective of this study was to optimize and e...