Search Results
Results 301 - 350 of 1472
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Laswed T - - 2008
We evaluated 16-detector-row CT in the assessment of occlusive peripheral arterial disease (PAD) of the abdominal aorta and lower extremities using an adaptive method of acquisition to optimise arterial enhancement especially for the distal foot arteries. Thirty-four patients underwent transcatheter angiography (TCA) and CT angiography within 15 days. For each ...
Lubicz B - - 2007
BACKGROUND AND PURPOSE: The purpose of this work was to assess intertechnique and interobserver reproducibility of 64-row multisection CT angiography (CTA) used to detect and evaluate intracranial aneurysms. MATERIALS AND METHODS: From October 2005 to November 2006, 54 consecutive patients with nontraumatic subarachnoid hemorrhage (SAH) underwent both CTA and digital ...
Jou L-D - - 2007
3D digital subtraction angiography (DSA) allows clinicians to review intracranial aneurysms and other vascular lesions. We report 2 basilar aneurysms that were imaged by both 3D DSA and DynaCT. These 2 techniques produced very different aneurysm appearances. Anterior portions of the aneurysms were invisible on 3D DSA but were revealed ...
Heijenbrok-Kal Majanka H - - 2007
PURPOSE: To obtain the best available estimates of the diagnostic performance of multidetector computed tomographic (CT) angiography compared with that of digital subtraction angiography (DSA) in the assessment of symptomatic lower extremity arterial disease and to identify the most important sources of variation in diagnostic performance between studies. MATERIALS AND ...
Sun Zhonghua - - 2008
PURPOSE: To perform a systematic review of the diagnostic value of 64-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 ...
Sadikin Cindy - - 2007
BACKGROUND/PURPOSE: This study was performed to evaluate the role of non-contrast 3D time-of-flight (TOF) magnetic resonance angiography (MRA) to detect and quantify intracranial steno-occlusive disease. METHODS: Between April 2004 and January 2006, 45 patients with both 1.5T TOF MRA and digital subtraction angiography (DSA) performed within a 30-day interval were ...
Litmanovich Diana - - 2008
The purpose of this study was to evaluate chest CTA protocol using retrospective ECG-gating and triphasic IV contrast regimen for comprehensive evaluation of patients with acute non-specific chest pain. ECG-triggered dose modulation was used with a 64-MDCT scanner in 56 non-critically ill patients with acute nonspecific chest pain using triphasic ...
Albrecht Thomas - - 2007
OBJECTIVE: The objective of our study was to prospectively compare CT angiography (CTA) performed on a 16-MDCT scanner and digital subtraction angiography (DSA) in patients with peripheral arterial disease. SUBJECTS AND METHODS: CTA and DSA were compared in 50 patients. CTA was independently evaluated by two blinded observers. DSA was ...
Tosun Ozgur - - 2007
Magnetic resonance angiography and digital substraction angiography (DSA) findings in a case with a rare congenital thoracoabdominal aortic hypoplasia and common celiamesenteric trunk variation with occlusion of infrarenal abdominal aorta are described here. To our knowledge, this aortic anomaly has not been previously described in the English literature. DSA is ...
Holden Andrew - - 2008
This paper illustrates examples of popliteal artery pathologies imaged with contrast enhanced magnetic resonance angiography (CE-MRA) and magnetic resonance imaging (MRI) at a single tertiary referral centre. Popliteal artery pathologies were identified in 1710 patients referred over a 6-year period with symptoms suggesting lower limb arterial occlusive disease. Common pathologies ...
Taschner C-A - - 2007
OBJECTIVE: The aim of this study was to determine the accuracy of multi-detector row computed tomography angiography (CTA) for the triage of patients with acutely ruptured aneurysms, and to assess how therapeutic decisions based on this method compared with digital subtraction angiography (DSA). METHODS: Twenty-seven consecutive patients with acute subarachnoid ...
Yang Yan Mei - - 2008
In rat models to induce both focal cerebral ischemia and chronic cerebral hypoperfusion, it is highly desirable to verify the success of vessel occlusion and reopening with non-invasive method. The contrast-agent free 3D time-of-flight magnetic resonance angiography (TOF-MRA), diffusion-weighted imaging (DWI) and T2-weighted imaging by 3.0-T MR clinical scanner were ...
Lin Eugene C - - 2007
A conceptual framework to approach the application of contrast media in computed tomography angiography (CTA) is discussed. With an adequate conceptual framework, the physician or technologist should be able to modify or create CTA protocols to address specific clinical and patient circumstances. The focus of this review is coronary CTA, ...
Iezzi Roberto - - 2007
AIM: The aim of this study was to evaluate the feasibility and effectiveness of multi-slice computed tomography (MSCT) angiography for the assessment of traumatic lesions involving the arteries of the lower limbs. MATERIALS AND METHODS: Forty-seven patients with suspected arterial post-traumatic lesions of lower limbs underwent MSCT angiography (4 x ...
Schlager Oliver - - 2007
PURPOSE: To evaluate the agreement of duplex ultrasound (DUS) versus digital subtraction angiography (DSA) for assessment of femoropopliteal arterial disease in a real-world clinical setting. METHODS: Consecutive patients with peripheral artery disease who were scheduled for a percutaneous intervention were included in this retrospective study. During an 18-month period, 491 ...
Hyodoh Hideki - - 2007
PURPOSE: To evaluate the efficacy of double-subtraction magnetic resonance angiography (MRA) (subtraction of the subtracted venous phase image from the subtracted arterial dominant phase image) for depicting the artery of Adamkiewicz and differentiating it from the drainage vein. MATERIALS AND METHODS: A total of 170 patients (123 men, 47 women; ...
Mull M - - 2007
BACKGROUND AND PURPOSE: The purpose of this work was to study the validity of MR angiography (MRA) for identification of spinal arteriovenous (AV) abnormalities. MATERIALS AND METHODS: Thirty-four consecutive patients with suspicion of spinal vascular abnormalities underwent digital subtraction angiography (DSA) after MRA. The level and side of the suspected ...
Wong John H - - 2007
OBJECT: Digital subtraction (DS) angiography is the current gold standard of assessing intracranial aneurysms after coil placement. Magnetic resonance (MR) angiography offers a noninvasive, low-risk alternative, but its accuracy in delineating coil-treated aneurysms remains uncertain. The objective of this study, therefore, is to compare a high-resolution MR angiography protocol relative ...
Papke Karsten - - 2007
PURPOSE: To evaluate the sensitivity of 16-detector row computed tomographic (CT) angiography in diagnosis of intracranial aneurysms and to determine whether multidetector CT angiography provides sufficient diagnostic information to guide endovascular treatment, with combined imaging and clinical data as the reference standard. MATERIALS AND METHODS: Institutional review board approval and ...
Allanore Y - - 2007
OBJECTIVE: Impairment of the microcirculation is a cardinal feature of systemic sclerosis (SSc). Magnetic resonance angiography (MRA) has improved the assessment of vascular lesions of the hand. The aim of this study was to evaluate vascular abnormalities in the hands of patients with SSc, using MRA. METHODS: Thirty-eight patients with ...
Planken Nils R - - 2008
A contrast-enhanced magnetic resonance angiography (CE-MRA) protocol for selective imaging of the entire upper extremity arterial and venous tree in a single exam has been developed. Twenty-five end-stage renal disease (ESRD) patients underwent CE-MRA and duplex ultrasonography (DUS) of the upper extremity prior to hemodialysis vascular access creation. Accuracy of ...
Huegli Rolf W - - 2008
PURPOSE: To evaluate the diagnostic value of contrast-enhanced intra-arterial 3D-MR-angiography (IA-MRA) of the infra-popliteal arteries in an open-bore magnet. Number, severity of arterial lesions, and artefacts were compared to routinely performed intra-arterial digital-subtraction angiography (IA-DSA) in patients suffering from symptomatic peripheral arterial occlusive disease (PAOD). MATERIAL AND METHODS: Fifteen patients ...
Bremerich Jens - - 2007
Contrast-enhanced magnetic resonance angiography (CE-MRA) with standard extracellular contrast material is well established for vascular imaging. Recently, the first blood pool contrast agent (BPA) has become clinically available. This paper reviews characteristics and classification of BPA as well as first clinical experience in various vascular territories. BPAs comprise gadolinium-based compounds, ...
Coffi S B - - 2008
OBJECTIVES: Cost-effectiveness analysis of three diagnostic imaging strategies for the assessment of aortoiliac and femoropopliteal arteries in patients with peripheral arterial occlusive disease. The strategies were: angiography as the reference strategy, duplex scanning (DS) plus supplementary angiography (S1) and DS plus confirmative angiography (S2). DESIGN, MATERIALS AND METHODS: A decision ...
Lubicz B - - 2007
BACKGROUND AND PURPOSE: To prospectively compare the effectiveness of time-of-flight (TOF) and contrast-enhanced (CE) MR angiography (MRA) with that of digital subtraction angiography (DSA) to assess immediate intracranial aneurysm occlusion after selective embolization. METHODS: From August 2006 to March 2007, 33 consecutive patients with 40 aneurysms were included. Thirty aneurysms ...
Kantarci Mecit - - 2007
PURPOSE: In this study, our goal is to determine the use of multidetector computed tomography (MDCT) in detection of aorto-ostial lesions. MATERIALS AND METHODS: Thirty-three patients suspected to have aorto-ostial lesion by either catheter angiography (CA) or MDCT coronary angiography comprised our study population. In 19 patients (group 1), aorto-ostial ...
von Rahden Burkhard H A - - 2007
Management of upper gastrointestinal bleeding because of erosion of vessels by esophageal cancer may be challenging. We present herein the angiographic images of a 49-year-old patient who was admitted with massive bleeding from a tumor-eroded inferior thyroid artery. Attempts to control the bleeding by means of flexible endoscopy and insertion ...
Thines L - - 2007
AIM: To develop a semi-automatic protocol helping to present directly and quickly three-dimensional digital subtraction angiography (3D-DSA) data in an orientation that reproduces exactly the neurosurgeon's intraoperative view. METHOD: Post-processing of 3D-DSA data (volume-rendering) was performed on an Integris workstation (Philips, Best); surgical views were obtained by visualization of the ...
Reinacher Peter C - - 2007
PURPOSE: The decision-making process in the endovascular treatment of cranial dural AV fistulas and angiomas and their follow-up after treatment is usually based on conventional digital subtraction angiography (DSA). Likewise, acquiring the vascular and hemodynamic information needed for presurgical evaluation of meningiomas may necessitate DSA or different MR-based angiographic methods ...
Schuknecht Bernhard - - 2007
BACKGROUND: CT angiography (CTA) is a minimally invasive technique that enables precise delineation of extracranial and intracranial vascular anatomy and pathology based on high intravascular density. With a 64-slice MDCT scanner, improved first-pass vascular visualization can be obtained with HCCM (400 mg I/ml) using 25 ml for combined intra-and extracranial ...
Jaspers Karolien - - 2007
PURPOSE: To dynamically resolve the inlet arteries and outlet veins of the spinal cord, particularly the Adamkiewicz artery (AKA) and great anterior radiculomedullary vein (GARV), using MR angiography (MRA). MATERIALS AND METHODS: First, conventional two-phase angiography (acquisition time = 38-55 seconds) utilizing elliptic centric k-space ordering was applied to aortic-aneurysm ...
Herzog Christopher - - 2007
PURPOSE: To prospectively evaluate the accuracy of 64-section computed tomographic (CT) coronary angiography for assessing significant stenosis on a global and segmental level, by using conventional coronary artery angiography as the reference standard. MATERIALS AND METHODS: This study was HIPAA compliant and had local institutional review board approval. Patients gave ...
Timaran Carlos H - - 2007
Contrast-enhanced magnetic resonance angiography (CE-MRA) is a proven diagnostic tool for the evaluation of carotid stenosis; however, its utility in planning carotid artery stenting (CAS) has not been addressed. This study assessed the accuracy of three-dimensional CE-MRA as a noninvasive screening tool, compared with digital subtraction angiography (DSA), for evaluating ...
Otte Johannes A - - 2007
BACKGROUND: Chronic gastrointestinal ischemia is still a difficult diagnosis to establish. The diagnosis depends on a high degree of clinical suspicion as well as selective angiography. Duplex sonography may serve as a screening tool, providing information on splanchnic vessel patency and flow patterns. GET is a minimally invasive test that ...
Tang Phua-Hwee - - 2007
INTRODUCTION: The new 3 Tesla (T) magnetic resonance (MR) scanners yield improved signal-to-noise ratio and spatial resolution with superior background suppression compared to lower field strength systems. This is advantageous for MR angiograms. The purpose of our study was to compare unenhanced three-dimensional time-of-flight magnetic resonance angiography (3D TOF MRA) ...
Diehm Nicolas - - 2007
To prospectively determine the accuracy of 1.5 Tesla (T) and 3 T magnetic resonance angiography (MRA) versus digital subtraction angiography (DSA) in the depiction of infrageniculate arteries in patients with symptomatic peripheral arterial disease. A prospective 1.5 T, 3 T MRA, and DSA comparison was used to evaluate 360 vessel ...
Wallace R C - - 2007
MRA is emerging as an alternative to conventional catheter based angiography for the assessment of aneurysms after endovascular treatment. Short TE and contrast enhanced MRA techniques can be applied to optimize image quality. We review the available data regarding the application of MR for the assessment of cerebral aneurysms after ...
Napoli A - - 2007
AIM: Recently whole-body 3D MR angiography (MRA) with blood-pool contrast agent has become available. The purpose of this study was to introduce and evaluate this technique to demonstrate arterial steno-occlusive involvement in systemic atherosclerosis and to compare blood-pool enhanced MRA results with those of CT angiography (CTA) as reference modality. ...
Hausleiter Jörg - - 2007
BACKGROUND: Non-invasive coronary angiography by multislice spiral computed tomography (MSCT) is a promising method for the diagnosis of coronary artery disease (CAD). However, the clinical role of this method has not been established for specific patient cohorts. Therefore, the objective of the current prospective, blinded study was to investigate the ...
Grierson C - - 2007
Recent advances in multidetector computed tomography (MDCT) technology have enabled the production of high-resolution diagnostic images of the visceral vessels. The potential of MDCT in relation to splanchnic artery pathology is still being realized, but it already provides a credible quick, non-invasive, low-dose alternative to digital subtraction angiography. A variety ...
Ishimaru H - - 2007
BACKGROUND AND PURPOSE: 3D time-of-flight (TOF) MR angiography (MRA) is insensitive to slow flow; however, the use of MR imaging contrast agents helps to visualize slow-flow vessels and avoids overestimation of vascular occlusion. The purpose of this study was to correlate pre- and postcontrast 3D TOF MRA with the results ...
Tarasów Eugeniusz - - 2007
BACKGROUND: The middle cerebral artery (MCA) has an individually varied anatomical type and course. Age and sex variability of MCA have not been completely defined. The aim was to define the range of normal values of widths and lengths of particular MCA segments, define age and sex variability, and compare ...
Poncyljusz Wojciech - - 2007
BACKGROUND: The aim was to compare digital subtraction angiography (DSA) with magnetic resonance angiography (MRA) in evaluating intracranial aneurysms embolized with Guglielmi Detachable Coils (GDCs) and to assess 3D TOF MRA source data, maximum intensity projection (MIP), and 3D iso-surface reconstruction in the follow-up of patients with cerebral aneurysms treated ...
Favaretto Elisabetta - - 2007
BACKGROUND: Angiography is the gold standard for therapeutic decision-making in lower limb artery disease. However, both the potentiality and safety of Duplex ultrasound scanning suggest that it may become the main diagnostic tool. The present study aimed to investigate the agreement between Duplex scanning and angiography in the diagnosis of ...
Arbel Yaron - - 2007
This study compared the recently introduced cheaper and more accessible wide-range C-reactive protein (wr-CRP) with the commonly used high-sensitivity C-reactive protein (hs-CRP) in patients undergoing coronary angiography. One hundred fifty-two consecutive patients who were admitted to a tertiary medical center and underwent angiography were included in the study. Arterial blood ...
Pozzi-Mucelli Fabio - - 2007
PURPOSE: To compare the contribution of 64 channel multidetector row computed tomography angiography (64MDCT-angiography) with digital subtraction angiography (DSA) in the detection of intracranial aneurysms. METHODS AND MATERIALS: Twenty-nine patients (10 males and 19 females, age: 40-84 years; average: 61.9 years) with clinical and imaging findings strongly suggesting the presence ...
Deutschmann H A - - 2007
BACKGROUND AND PURPOSE: 3D time-of-flight MR angiography (3D TOF MRA) may be used as noninvasive alternative to digital subtraction angiography (DSA) for the follow-up of patients with intracranial aneurysms treated with Guglielmi detachable coils (GDCs). We aimed to determine the influence of aneurysm size and location on diagnostic accuracy of ...
Goo Hyun Woo - - 2007
PURPOSE: To evaluate the usefulness of time-resolved three-dimensional (3D) magnetic resonance angiography (MRA) using diluted contrast agent (CA) in patients who had undergone a Fontan operation or bidirectional cavopulmonary connection (BCPC). MATERIALS AND METHODS: Time-resolved 3D MRA (10 dynamic data sets, two seconds per dynamic data set) using parallel imaging ...
Layton Kennith F - - 2007
OBJECTIVE: We believe that many studies in the literature show a falsely elevated specificity for carotid MR angiography (MRA) in the detection of high-grade stenosis. The purpose of this study was to test the hypothesis that inclusion of a substantial proportion of normal carotid arteries in a study population will ...
Nael Kambiz - - 2007
During the past decade, technical improvements and numerous advances in scanner hardware and software have significantly improved image quality, speed, and reliability of 3-dimensional (3-D) contrast-enhanced magnetic resonance angiography (CE-MRA). The accuracy of CE-MRA is now comparable with that of computed tomography angiography or even conventional catheter angiography. Peripheral vascular ...
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