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Combaz X - - 2011
BACKGROUND AND PURPOSE: The angioarchitecture of brain arteriovenous malformations (BAVM) still remains a complex subject of study despite advances in medical imaging techniques. For this reason, the present study aimed to assess whether or not 3D rotational angiography (3DXA) might improve the assessment of BAVM. PATIENTS AND METHODS: Included prospectively ...
Blackmon Kevin N - - 2011
PURPOSE: To evaluate the effect of a computer-aided detection (CAD) algorithm on the performance of novice readers for detection of pulmonary embolism (PE) at CT pulmonary angiography (CTPA). MATERIALS AND METHODS: We included CTPA examinations of 79 patients (50 female, 52 ± 18 years). Studies were evaluated by two independent inexperienced readers who ...
Choudhary Gaurav - - 2011
: To determine the interobserver reliability for grading coronary stenosis severity with coronary computed tomographic angiography (CCTA). : Five readers independently reviewed 40 CCTA studies, first the axial images alone, then in combination with multiplanar reconstructions. The stenosis severity in each segment was scored on a 5-point scale. Intraclass correlation ...
Chow C K - - 2011
The improved technology of multi-slice cardiac CT angiography (CTA) has enabled production of high quality images of the coronary arteries. The sensitivity and specificity of the test in identifying patients with obstructive coronary lesions in 64-slice and later generations of scanners is high. To enable effective use of CTA in ...
Qin Jing J Department of Mechanical Engineering, National University of - - 2011
Abdominal aortic aneurysm (AAA) rupture is believed to occur when the mechanical stress acting on the wall exceeds the strength of the wall tissue. In endovascular aneurysm repair, a stent-graft in a catheter is released at the aneurysm site to form a new blood vessel and protect the weakened AAA ...
Spasojevic M - - 2011
3-D relations between the ileocolic (ICA), right colic artery (RCA) with the superior mesenteric vein (SMV) have been described in cadavers. However, no data exists on preoperative evaluation of these relations. To define the length of crossing and 3-D position of the ICA and RCA to the SMV in patients ...
Marshalleck Francis - - 2010
The spectrum of pediatric vascular pathology differs from the adult population and it varies greatly to include congenital and acquired disorders. Although catheter-directed angiography remains the gold standard, most vascular conditions in the child can be adequately diagnosed with magnetic resonance angiography, computed tomographic angiography, or duplex/Doppler ultrasonography with only ...
Vicenzini Edoardo - - 2010
The aim of this review is to illustrate the sonographic features that can be detected in vertebral artery (VA) diseases. We conducted a review of sonographic findings in VA diseases. Various VA diseases are described, and sonographic techniques and features are discussed. Posterior circulation vascular imaging can be performed by ...
Hoette Susana - - 2010
Over the last five years, knowledge in the field of pulmonary hypertension has grown consistently and significantly. On the basis of various clinical studies showing the usefulness of new diagnostic tools, as well as the efficacy of new medications and drug combinations, new diagnostic and treatment algorithms have been developed. ...
Schiller N K - - 2010
Vascular anastomoses constitute a main factor in poor graft performance due to mismatches in distensibility between the host artery and the graft. This work aims at computational fluid-structure investigations of proximal and distal anastomoses of vein grafts and synthetic grafts. Finite element and finite volume models were developed and coupled ...
Fan Xiaobing X Department of Radiology, The University of Chicago, Chicago, Illinois 60637, - - 2010
Accurate measurement of the arterial input function is critical for quantitative evaluation of dynamic contrast enhanced magnetic resonance imaging data. Use of the reference tissue method to derive a local arterial input function avoided large errors associated with direct arterial measurements, but relied on literature values for K(trans) and v(e). ...
Hsu Chung-Chen CC Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung Medical College, Chang Gung University, Taipei, - - 2010
Replantation of the distal phalanx and pulp can be performed to improve finger function and finger aesthetics; however, establishing adequate venous drainage is a challenge. Slattery et al. reported microsurgical reattachment of a partial distal phalanx with the use of a bifurcated terminal digital artery. The bifurcation was divided into ...
Zhang Long Jiang - - 2011
The purpose of this study was to evaluate the feasibility of gadolinium-enhanced dual energy CT pulmonary angiography (CTPA) to detect pulmonary embolism (PE) in rabbits. Dual energy CT was performed on phantoms composed of different dilution of gadolinium and iodinated contrast agents, CT numbers of the phantoms were measured at ...
Kainuma Satoshi - - 2011
Visceral ischemia is a serious factor in the postoperative morbidity and mortality of suprarenal aortic reconstruction. We report a case of a patient who underwent surgical repair for a paravisceral aortic aneurysm complicated with aortoiliac occlusion, using a novel visceral reconstruction. Prior to proximal anastomosis of the aorta, we reconstructed ...
Collins Joseph M - - 2010
This is the third in a series of medical graphics articles featuring the arterial anatomy of the pancreas as depicted on segmented computed tomography-angiography. These segmented computed tomography-angiography displays serve as a road map of the routes of tumor spread by ductal adenocarcinoma of the pancreas because perineural tumor invasion ...
van Velzen Joëlla E - - 2011
The positive predictive value of multidetector computed tomography angiography (CTA) for detecting significant stenosis remains limited. Possibly CTA may be more accurate in the evaluation of atherosclerosis rather than in the evaluation of stenosis severity. However, a comprehensive assessment of the diagnostic performance of CTA in comparison with both conventional ...
Radlbauer Rudolf - - 2011
The purpose of this study was to determine the optimal systolic and diastolic time delays for electrocardiographic triggering of a non-contrast media enhanced MR angiography using a 3-dimensional fast spin echo sequence in patients suffering from peripheral arterial disease. 12 patients with suspected peripheral arterial disease were examined on a ...
Palazzo Paola - - 2012
A 54-year-old woman started to loose vision 2 days prior to admission and also experienced left-sided headache, nausea, emesis, and disorientation. Magnetic resonance imaging (MRI) revealed bilateral posterior cerebral artery and cerebellar infarctions. Transcranial power motion Doppler (PMD-TCD) showed blunted flow signal in the proximal basilar artery (BA) suggestive for ...
Kerl J Matthias - - 2011
Lung perfusion analysis at dual energy CT (DECT) is sensitive to beam hardening artifacts from dense contrast material (CM). We compared two scan and four CM injection protocols in terms of severity of artifacts and attenuation levels in the thoracic vessels. Data of 120 patients who had undergone dual source ...
Sabri A - - 2011
Imaging studies are indispensable in order to determine the source, location and pattern of intra and extra-axial brain haemorrhages. In our study of 277 patients carried out over an 18 month period, the most common reason of referral was subarachnoid haemorrhage followed by trauma. Aneurysms were the most common diagnosis ...
Uchida Yasumi - - 2010
Pulmonary embolism (PE) is often fatal and its incidence is increasing worldwide. Detection of thromboemboli (TEi) is essential for a definitive diagnosis of PE. The detection of TEi using most imaging methods is low in patients clinically suspected of having PE. This study was carried out to detect TEi in ...
Dai Weiying W Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA. - - 2010
Imaging the contribution of different arterial vessels to the blood supply of the brain can potentially guide the treatment of vascular disease and other disorders. Previously available only with catheter angiography, vessel-selective labeling of arteries has now been demonstrated with pulsed and continuous arterial spin labeling methods. Pulsed continuous labeling, ...
Konstandin Simon - - 2011
Generic arterial spin labeling (ASL) techniques label all brain feeding arteries. In this work, we used two different selective ASL (SASL) methods to show the perfusion of one single artery. A slice selective inversion of an area including the desired vessel was compared to a multidimensional RF pulse with Gaussian ...
Lee Dong Ho - - 2010
To evaluate the diagnostic accuracy of multidetector computed tomography (MDCT) angiography for prediction of availability of the right gastroepiploic artery (RGEA) for coronary artery bypass grafting surgery (CABG). This study included 149 patients who underwent both preoperative MDCT angiography and exploratory laparotomy to harvest the RGEA for CABG. The prediction ...
Matsumoto Shoji - - 2010
Dissections involving intracranial arteries are sometimes difficult to assess using conventional digital subtraction angiography (DSA). We evaluated the value of three-dimensional rotational angiography (3D-RA) for the assessment of intracranial arterial dissections (ICADs). The subjects were 39 patients (26 males, 13 females; average age 50+/-15years) who were diagnosed as having ICADs ...
Wasinrat Jitladda - - 2011
To compare multidetector row computed tomographic (MDCT) angiography with conventional digital subtraction angiography (DSA) in the evaluation of vascular access stenoses in hemodialysis patients. Twenty-one consecutive patients were imaged with MDCT angiography and subsequent DSA. The superficial vein of leg was used as the route for intravenous administration. The vascular ...
Menke Jan - - 2010
Contrast-enhanced magnetic resonance angiography (MRA) is a noninvasive, radiation-free imaging method for studying peripheral arterial disease (PAD) of the lower extremities. To summarize evidence of prospective studies about how well MRA identifies or excludes arterial steno-occlusions (50% to 100% lumen reduction) in adults with PAD symptoms. PubMed and 3 other ...
Pomposelli Frank - - 2010
Precise comprehensive imaging of arterial circulation is the cornerstone of successful revascularization of the ischemic extremity in patients with diabetes mellitus. Arterial imaging is challenging in these patients because the disease is often multisegmental, with a predilection for the distal tibial and peroneal arteries. Occlusive lesions and the arterial wall ...
Atalay Michael K - - 2010
OBJECTIVE: To compare aortic, pulmonary artery (PA), and coronary artery (CA) density and examination quality using 3 different injection protocols for electrocardiogram-gated 64-detector row computed tomographic angiography. METHODS: We reviewed 30 consecutive computed tomographic angiography studies for each of 3 different contrast protocols (A, B, and C)-90 studies total-performed in ...
Brockmann Carolin - - 2010
The objective of this study is to compare a graph-matching-based software and a conventional tool for postprocessing of computed tomography angiography (CTA) in correlation with the gold standard digital subtraction angiography. Sensitivity, specificity, accuracy, and interobserver agreement increased from 80.3% to 92.9%, from 69.1% to 92.4%, from 73.5% to 92.8%, ...
Pomposelli Frank - - 2010
Precise, comprehensive imaging of the arterial circulation is the cornerstone of successful revascularization of the ischemic extremity in patients with diabetes mellitus. Arterial imaging is challenging in these patients because the disease is often multisegmental with a predilection for the distal tibial and peroneal arteries. Occlusive lesions and the arterial ...
Okell Thomas W TW Centre for Functional Magnetic Resonance Imaging of the Brain, Department of Clinical Neurology, University of Oxford, Oxford, - - 2010
A new noninvasive MRI method for vessel selective angiography is presented. The technique combines vessel-encoded pseudocontinuous arterial spin labeling with a two-dimensional dynamic angiographic readout and was used to image the cerebral arteries in healthy volunteers. Time-of-flight angiograms were also acquired prior to vessel-selective dynamic angiography acquisitions in axial, coronal, ...
Donmez Halil - - 2011
The aim of this study is to compare the diagnostic performance of 16-row computed tomographic angiography (MDCTA) with digital subtraction angiography (DSA) for the detection and characterization of intracranial aneurysms in patients with nontraumatic subarachnoid hemorrhages (SAH). One-hundred and twelve consecutive patients with suspected intracranial aneurysm underwent both 16-row MDCTA ...
Nonent M - - 2011
To evaluate the agreement and diagnostic accuracy of Contrast enhanced magnetic resonance angiography (CE-MRA), Doppler ultrasound (DUS) and Digital subtraction angiography (DSA) in the assessment of carotid stenosis. DUS, CE-MRA and DSA were performed in 56 patients included in the Carotide-angiographie par résonance magnétique-échographie-doppler-angioscanner (CARMEDAS) multicenter study with a carotid ...
Lu Hanbing - - 2010
In quantitative perfusion imaging using arterial spin labeling, variable blood transit times and postlabeling delays are two confounding factors that may compromise the accuracy of perfusion quantifications. In this study, theoretical analyses and experimental data at 9.4 T demonstrate that increasing labeling duration not only enhances the contrast of the ...
Okell Thomas W - - 2010
A new noninvasive MRI method for vessel-selective angiography is presented. The technique combines vessel-encoded pseudocontinuous arterial spin labeling with a two-dimensional dynamic angiographic readout and was used to image the cerebral arteries in healthy volunteers. Time-of-flight angiograms were also acquired prior to vessel-selective dynamic angiography acquisitions in axial, coronal, and/or ...
Wachter D - - 2010
After clipping of intracranial aneurysms, digital subtraction angiography (DSA) is recommended for the proof of complete aneurysm occlusion or identification of aneurysm remnants, especially in cases with a more complex angioarchitecture or a difficult operative course. The aim of this study was to evaluate if postoperative intravenous angiographic computed tomography ...
Shin Suyoung - - 2010
PURPOSE: To classify peripheral pulmonary arterial pseudoaneurysms (PAPs) associated with infectious lung diseases according to angiographic findings and to determine treatment options for PAPs on the basis of angiographic classifications. MATERIALS AND METHODS: The institutional review board approved this study. A total of 24 patients with massive hemoptysis had PAPs ...
Hunsaker Andetta R - - 2010
OBJECTIVE: The purpose of our study was to evaluate whether a reduced volume of iodinated contrast material for pulmonary CT angiography (CTA) using a low peak kilovoltage (kVp) technique yields equivalent opacification in all vessels. MATERIALS AND METHODS: Four hundred fifty-two consecutive pulmonary CTA patients (265 women and 187 men; ...
Tamura Yoshitaka - - 2010
OBJECTIVE: Our aim was to investigate the image quality of MDCT angiography of the brain at a low-volume of contrast material. SUBJECTS AND METHODS: One hundred patients were randomly assigned to one of two groups, which differed with regard to contrast material volume and subsequent saline bolus: group A was ...
Katoh Marcus - - 2011
To investigate the value of rotational digital subtraction angiography (rDSA) for evaluation of peripheral and visceral artery stenoses compared to conventional digital subtraction angiography (cDSA). A phantom study was performed comparing the radiation dose of cDSA with two projections and rDSA by means of the 2D Dynavision technique (Siemens Medical ...
O'Neill S - - 2011
Evaluate whether common femoral artery (CFA) Doppler waveform assessment predicted the presence of significant iliac artery stenosis as visualised on magnetic resonance angiography (MRA). Three-year retrospective study of patients investigated using CFA Doppler waveforms and MRA. The patients were identified from vascular/radiology databases. Waveforms were reported real time as monophasic, ...
Groth M - - 2011
To evaluate the agreement of pulmonary artery diameters assessed with 3D contrast-enhanced MR angiography (CE-MRA) and a 2D balanced steady-state-free precession sequence (bSSFP) in non-stenotic and stenotic pulmonary arteries (PA). 44 right and left PAs (30 non-stenotic and 14 stenotic) were examined in 23 consecutive patients by performing CE-MRA as ...
Knobel Zita - - 2011
We sought to establish normal values for the diameters of the main (MPA), right (RPA), and left (LPA) pulmonary arteries and for the angles describing the geometry of the pulmonary artery bifurcation in children by using contrast-enhanced magnetic resonance angiography (CE-MRA). CE-MRA was performed in 69 children without cardiovascular disease. ...
Anders Katharina - - 2011
To evaluate, whether semi-automated vessel extraction and curved planar reformations ("automated vessel extraction") increases diagnostic accuracy in the detection of relevant coronary artery lesions compared to manual, interactive multiplanar interpretation ("manual approach"). 50 coronary CT angiography datasets were evaluated by four independent readers (two experienced, two novice) for the presence ...
Eiberg J P - - 2010
To assess the reliability and applicability of duplex ultrasound scanning (DUS) of lower limb arteries, compared with digital subtraction angiography (DSA), in patients with peripheral arterial disease (PAD). A prospective, blinded, comparative study. A total of 169 patients were examined by DUS and DSA. Intermittent claudication (IC) was present in ...
Hasegawa Tomomi - - 2010
We successfully performed transection of the innominate artery in a patient with a neuromuscular disorder through minimally invasive access after confirming the anatomical relationships of the vessel using 3-dimensional multidetector-row computed tomographic angiography. A 16-year-old girl with spinal muscular atrophy type 1 had been on long-term mechanical ventilation with a ...
Schaafsma Joanna D - - 2010
BACKGROUND AND PURPOSE: To follow up patients with coiled intracranial aneurysms, magnetic resonance angiography (MRA) is a promising noninvasive alternative to current standard intra-arterial digital subtraction angiography (IA-DSA). MRA test results do not always concord with those of IA-DSA, and the impact of discrepancies on health benefits and costs is ...
Sommer Wieland H - - 2010
The aim of this study was to test the feasibility of time-resolved computed tomography angiography (TR-CTA) for use in the lower leg. Fifty-nine patients with suspected peripheral arterial occlusive disease were examined with a standard CTA (S-CTA) of the lower run-off and with an additional TR-CTA of the calves (12 ...
Hölzle Frank - - 2011
The peroneal artery is the dominant supply of the osteomyocutaneous fibular flap. It has been shown that there can be anatomical variants that could jeopardise the blood supply to the lower limb during harvest of the flap. To avoid postoperative ischaemia of the lower leg, preoperative evaluation of adequate collateral ...
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