PURPOSE: The aim of this study was to evaluate spiral multidetector computed tomography (MDCT) angiography using 64-slice technique in the detection of functionally relevant coronary artery stenoses (CAS). METHODS: Thirty-eight patients (62+/-11 years, 28 men) with stable angina (26 with suspected and 12 with known coronary artery disease) were investigated ...

Digital subtraction angiography through the central artery of the ear was performed to show elastase-induced aneurysms in 34 rabbits. Twenty-eight (82%) aneurysms in which common origins of the bilateral common carotid artery (CCA) were found were well shown. All 6 other aneurysms not well shown had separate origins of the ...

PURPOSE: To prospectively evaluate the diagnostic performance of contrast material-enhanced magnetic resonance (MR) angiography in helping predict ovarian artery supply of uterine fibroids by using postembolization conventional aortography as the reference standard. MATERIALS AND METHODS: The protocol for the study was approved by the institutional review board, and each patient ...

PURPOSE: To perform a meta-analysis of the diagnostic value of multislice CT (MSCT) angiography in the detection of coronary artery disease (CAD) when compared to conventional coronary angiography. MATERIALS AND METHODS: A search of PubMed and MEDLINE databases for English literature was performed. Only studies with at least 10 patients ...

SUMMARY: Spinal cord arteries and veins are difficult to visualize and distinguish by MR angiographic techniques because of their small sizes, similar spatial course, and close vascular anatomy. Contrast-enhanced MR angiography was demonstrated to dynamically resolve the Adamkiewicz artery from the anterior radiculomedullary vein in the thoracolumbar spinal cord. The ...

In the thoracolumbar region, it is well known that the great anterior medullary artery (the artery of Adamkiewicz: AKA) is the dominant feeder of the spinal cord. During surgery for posterior mediastinal tumor adjacent to the lower thoracic aorta, perioperative distortion of the spinal cord blood supply could lead to ...

PURPOSE: To compare the measurements of internal carotid artery (ICA) stenosis obtained from multidetector computed tomographic angiography (CTA) and digital subtraction angiography (DSA) based on the NASCET and ECST grading methods. METHODS: In a retrospective cohort analysis from data at a tertiary care university clinic, the CTA and DSA images ...

OBJECTIVE: The goal of this study was to determine the role of gadolinium-enhanced 3D MR angiography (MRA) in patients with suspected pulmonary hypoplasia and aplasia in a retrospective analysis of MRA and digital subtraction angiography in 11 patients with clinical and/or radiologic suspicion of pulmonary hypoplasia and aplasia. CONCLUSION: Gadolinium-enhanced ...

OBJECT: The authors conducted a study to determine the utility of the clinical profile and magnetic resonance (MR) angiography in evaluating patients with isolated third cranial nerve palsies or posterior communicating artery (PCoA) aneurysms. METHODS: Three-dimensional time-of-flight MR angiography was performed in a consecutive series of patients with isolated acute ...

PURPOSE: To prospectively evaluate the technical feasibility and relative performance of pulmonary time-resolved MR angiography (MRA) and pulmonary artery (PA) flow quantification at 3.0T vs. 1.5T. MATERIALS AND METHODS: Time-resolved contrast-enhanced (CE) MRA of the pulmonary circulation, and flow quantification of the main PA (MPA) were performed in 14 consecutive ...

OBJECTIVE: The purpose of this study is to evaluate the accuracy of semiautomated analysis of contrast enhanced magnetic resonance angiography (MRA) in patients who have undergone standard angiographic evaluation for peripheral vascular disease (PVD). BACKGROUND: Magnetic resonance angiography is an important tool for evaluating PVD. Although this technique is both ...

PURPOSE: To prospectively evaluate the technical feasibility of both high-spatial-resolution and time-resolved contrast material-enhanced magnetic resonance (MR) angiography of the pulmonary circulation at 3.0 T. MATERIALS AND METHODS: All examinations were HIPAA compliant. After institutional review board approval and written informed consent, time-resolved and high-spatial-resolution three-dimensional contrast-enhanced MR angiography of ...

PURPOSE: The aim of this study was to prospectively determine interobserver agreement between on-call radiology residents and specialists in the interpretation of computed tomographic pulmonary angiography (CTPA). METHODS: CTPA examinations obtained between January 2002 and March 2003 were interpreted by a radiology resident on call and by two radiology specialists. ...

OBJECTIVE: The objective of our study was to evaluate an isotropic high-spatial-resolution 3D contrast-enhanced MR angiography (CE-MRA) protocol with high acceleration parallel acquisition at 3.0 T for the display of the abdominal vasculature. SUBJECTS AND METHODS: Thirty-two consecutive patients (13 men, 19 women; age range, 28-88 years) with suspected abdominal ...

Though invasive coronary angiography is the gold standard for the diagnosis of coronary artery aneurysms, computed tomography angiography may be just as useful in providing details of their morphology, size, location and associated stenosis or ectasia. Besides, it has the advantage of being a non-invasive modality.We present a case in ...

Persistent sciatic artery is a rare but potentially significant vascular anomaly that is associated with a high incidence of aneurysm formation and limb-threatening ischemic complications. The diagnosis of persistent sciatic artery has usually been made by conventional angiography. We report a case of occluded and patent persistent sciatic arteries in ...

INTRODUCTION: Cervical artery dissection is an important cause of ischemic stroke, particularly in young patients. The diagnosis can be made with invasive catheter angiography or non-invasive imaging, either with MRI in conjunction with MR angiography (MRA) or CT angiography (CTA). Both modalities have been shown to have a high specificity ...

AIMS: Our purpose was to assess the value of magnetic resonance angiography as a non-invasive alternative to catheterization in the evaluation of patients with tetralogy of Fallot, including those with pulmonary atresia. METHODS AND RESULTS: We evaluated prospectively, using magnetic resonance angiography, 30 patients, aged from 1 to 18 years, ...

The place of angiography in late presentation of headache associated with sexual activity has not been defined, unlike the situation with acute presentations. In a cohort of patients fulfilling diagnostic criteria for primary headache associated with sexual activity and presenting late (at least three weeks after headache onset), those undergoing ...

BACKGROUND AND PURPOSE: 3D computed tomographic angiography (3DCTA) has been used recently for the evaluation of intracerebral aneurysms, but it is difficult to use this technique to visualize aneurysms near the base of the skull because of the presence of bone. Subtracted 3DCTA could replace digital subtraction angiography (DSA) for ...

An aberrant internal carotid artery (ICA) is a rare vascular anomaly and causes to objective pulsatile tinnitus and retrotympanic mass. In the past, it was often diagnosed during ear surgery or biopsy, which may lead to massive bleeding. We present a case of 37-year-old woman complaining of pulsatile tinnitus. The ...

Although the incidence of coronary artery aneurysms has diminished in patients with Kawasaki disease, coronary artery involvement is still regarded as a major complication of the disease, significantly affecting morbidity and mortality. Recent technical advances in coronary CT angiography (CTA) and MR angiography (MRA) have led to the possibility of ...

BACKGROUND: This study was undertaken to assess the reliability of duplex scanning, as compared with digital subtraction angiography, in diagnosing peripheral arterial disease of the lower limbs. PATIENTS AND METHODS: 60 legs were studied. Each leg was divided in 5 arterial segments, from aortoiliac to popliteal. Duplex scanning and digital ...

BACKGROUND: Multislice computed tomography (MSCT) is a promising noninvasive method of detecting coronary artery disease (CAD). However, most data have been obtained in selected series of patients. The purpose of the present study was to investigate the accuracy of 64-slice MSCT (64 MSCT) in daily practice, without any patient selection. ...

OBJECTIVE: We investigated the agreement of multislice computed tomography angiography (CTA) and magnetic resonance angiography (MRA) in the quantitative measurement of carotid artery stenosis. The dependency of the agreement of the chosen postprocessing procedures was also investigated. METHODS: Fifty consecutive symptomatic patients were included in this study. In all patients, ...

We have been using magnetic resonance angiography (MRA) preoperatively to identify patients at increased risk of stroke in coronary artery bypass grafting (CABG). Based upon the intracranial MRA findings, either the off-pump or the on-pump procedure was selected. We report the results of our MRA-based strategy of CABG in 140 ...

BACKGROUND AND PURPOSE: The aim of this study was to determine the feasibility and usefulness of contrast-enhanced MR angiography (CE-MRA) for the follow-up of intracranial aneurysms treated with detachable coils, by comparing CE-MRA with digital subtraction angiography (DSA) and 3D time-of- flight (TOF) MRA. METHODS: Thirty-two patients with 42 treated ...

Elliptical centric contrast-enhanced MR angiography of the cervical vasculature is a well-established technique that in many practices has replaced conventional angiography for several clinical indications, including atherosclerotic disease and dissections. Occasionally blurring or loss of signal intensity occurs in the vertebral arteries, especially in young patients with rapid circulation times. ...

The aim of this study was to evaluate intra-arterial magnetic resonance angiography (MRA) of the iliac arteries. Therefore, 25 consecutive patients (17 male, 8 female) suffering from symptomatic occlusive disease of the lower limbs were investigated prospectively. Catheter angiography was performed before MRA and served as the standard of reference. ...

Raynaud's disease is associated with disorders in blood circulation of the hands. The gold standard to visualise pathology of digital arteries is catheter angiography. Contrast-enhanced MR angiography (CE MRA) has developed even more as an alternative non-invasive method to digital subtraction angiography, mostly for pelvic or lower limb vessels. We ...

BACKGROUND: Two-dimensional axial and manually-oriented reformatted images are traditionally used to analyze coronary data provided by multidetector-row computed tomography angiography (MDCTA). While apparently more accurate in evaluating calcified vessels, 2D methods are time-consuming compared with automated 3D approaches. The purpose of this study was to evaluate the performance of a ...

BACKGROUND AND PURPOSE: To compare the utility of contrast-enhanced MR Angiography (CE-MRA) with digital subtraction angiography (DSA) after endovascular treatment of intracranial aneurysms with Guglielmi detachable coils. METHODS: From April 1999 to August 2002, 106 patients with 107 aneurysms treated by endovascular coiling using Guglielmi detachable coils underwent simultaneous DSA ...

Twenty-nine patients with suspected pulmonary lesions, and three normal volunteers, underwent gadolinium-enhanced three-dimensional (3D) pulmonary MR angiography (MRA). The MRA were obtained during intravenous administration of gadolinium-based contrast material, in a single breath-hold. Conspicuity of the normal pulmonary segmental arteries, expect for A4, 5, 6, 8, and9 of the left ...

Transcranial color-coded duplex sonography (TCDS) is a noninvasive, quick and inexpensive diagnostic tool used routinely to assess vascular abnormalities in cerebral ischemia. The value of TCDS for diagnosis and follow-up of acute basilar artery (BA) ischemia in comparison/combination with spiral CT angiography (CTA) and/or digital subtraction angiography (DSA) has not ...

OBJECT: In this study the accuracy of multislice computerized tomography (MSCT) angiography in the postoperative examination of clip-occluded intracranial aneurysms was compared with that of intraarterial digital subtraction (DS) angiography METHODS: Forty-nine consecutive patients with 60 clipped aneurysms (41 of which had ruptured) were studied with the aid of postoperative ...

BACKGROUND: Intraoperative angiography for neurovascular disease has gained wide acceptance as a useful tool. There are few published cases of intraoperative angiography performed in the prone or three-quarter prone position, and the transradial approach has not previously been described for this situation. METHODS: We retrospectively reviewed our last 177 consecutive ...

PURPOSE: To prospectively evaluate gadolinium dose safety and effectiveness for 16-detector pulmonary computed tomographic (CT) angiography. MATERIALS AND METHODS: Ethics committee approval and informed consent were obtained. Sixty patients with contraindications to iodine underwent CT of the pulmonary circulation with 0.5 mmol/L gadolinium chelate given at either 0.3 (n = ...

OBJECTIVE: In this pictorial essay, we show the usefulness of MDCT angiography for visualization of the bronchial and nonbronchial systemic feeder vessels responsible for hemoptysis. CONCLUSION: By providing thin-section transaxial, multiplanar reconstruction, and 3D images, CT angiography using MDCT allows comparable or better images than conventional angiography with respect to ...

Aim: To study the angiographic pattern of intracranial diseases encountered in Enugu following conventional carotid angiography (CCA) over an 11 year period. <BR>Method/Materials: The case notes, indications, request forms, films and radiological reports of all patients who had CCA were compiled and analysed. <BR>Results: Fifty nine patients consisting of 38 ...

Gadolinium (Gd)-enhanced three-dimensional breath-hold magnetic resonance cardiac-synchronized angiography was performed in 13 patients suspected or known to have thoracic aortic disease. High-quality angiograms of the ascending/descending thoracic aorta and coronary arteries were obtained with this method. MR angiograms were compared with Gd-enhanced angiograms obtained without cardiac synchronization. Synchronized imaging showed ...

OBJECTIVE AND IMPORTANCE: Although three-dimensional (3D) rotational angiography enables the visualization of intracranial vascular anatomy with high spatial resolution, its ability to resolve calcified features is limited. We present a case in which a 3D calcium density rendering was fused with rotational cerebral angiography to guide the treatment strategy of ...

PURPOSE: To test the hypothesis that the technical success rates, complication rates, and procedural times for magnetic resonance (MR) imaging-guided percutaneous transluminal angioplasty (PTA) and conventional (x-ray) fluoroscopy-guided PTA for treatment of renal artery stenosis are similar. MATERIALS AND METHODS: The study was animal care and use committee approved. After ...

Idiopathic infantile arterial calcification (IIAC) is a rare condition characterized by extensive calcification and stenosis of large and medium-size arteries. The etiology of the disease is unknown. However, the inheritance pattern has been shown to be autosomal recessive. The clinical presentation is variable, including cardiac failure (most common clinical finding), ...

Summary: A follow-up of the embolized cerebral aneurysm with Guglielmi Detachable Coils (GDC) were performed mainly using craniograms and digital subtraction angiograms (DSA) so far.Recently, several authors have reported about efficacy of the time of flight (TOF) magnetic resonance angiogram (MRA) as a follow-up for the embolized cerebral aneurysms. In ...

Coronary artery disease (CAD) is still an important cause of morbidity and mortality in the Western world. The gold standard for assessing significant coronary artery stenosis is invasive coronary angiography. Several disadvantages of the technique in combination with the fact that a substantial number of patients referred for conventional angiography ...

Arterial Spin Labeling (ASL) is a non-invasive method to quantitatively measure perfusion without the need of contrast material. Measurement of perfusion is derived from the subtraction of two consecutively acquired scans, with or without radio frequency labeling of the magnetization in the feeding arteries. So far, almost all ASL methods ...

PURPOSE: To evaluate 3D-Gd-magnetic resonance angiography (MRA) in detecting hemodynamically significant renal artery stenosis (RAS). MATERIAL AND METHODS: Thirty patients evaluated for atherosclerotic RAS by MRA and digital subtraction angiography (DSA) were retrospectively included. Standard of reference for hemodynamically significant RAS was a transstenotic gradient of 15 mmHg. DSA visualized ...

OBJECT: The aim of this study was to determine whether computerized tomography (CT) angiography could be used to identify and characterize aneurysms of the posterior circulation and guide optimal treatment selection, and how data obtained using this method compared with intraoperative findings. METHODS: Patients suspected of harboring brain aneurysms underwent ...

Magnetic resonance angiography (MRA) is increasingly used as a non-invasive method to assess carotid arteries. Contrast-enhanced MRA (CE-MRA) has benefited from rapid technological developments, including specific hardware and pulse sequence design. In the evaluation of stenoses of the extracranial internal carotid artery (ICA), CE-MRA using "first generation" CE-MRA gadolinium (Gd)-based ...

The basis of the development of optimal injection protocols for multiple detector-row CT-angiography is knowledge of the physiological and pharmacokinetic principles of arterial enhancement. This article reviews the key rules of early arterial contrast medium dynamics: (1) Arterial enhancement is directly proportional to the iodine administration rate (iodine flux), and ...