نتایج جستجو برای: dsa angiography

تعداد نتایج: 46947  

1999
Birgitta K. Velthuis Theodoor D. Witkamp Maarten S. van Leeuwen

Background and Purpose—It is important to recognize a perimesencephalic pattern of hemorrhage in patients with subarachnoid hemorrhage (SAH), because in 95% of these patients the cause is nonaneurysmal and the prognosis is excellent. The purpose of this study was to investigate whether CT angiography can accurately exclude vertebrobasilar aneurysms in patients with perimesencephalic patterns of...

Journal: :AJNR. American journal of neuroradiology 1997
M Ida Y Kurisu M Yamashita

PURPOSE To determine the efficacy of high-resolution MR angiography for the prospective diagnosis of ruptured aneurysms in acute subarachnoid hemorrhage. METHODS We used 3-D time-of-flight MR angiography with a large image matrix (193 x 512 frequency-encoding steps), magnetization transfer saturation, and a variable flip-angle excitation (tilted optimized nonsaturating excitation [TONE]) to s...

Journal: :AJNR. American journal of neuroradiology 1996
J Link J Brossmann M Grabener S Mueller-Huelsbeck J C Steffens G Brinkmann M Heller

PURPOSE To determine whether spiral CT angiography allows accurate, quantitative evaluation of anatomic abnormalities, including detection of additional lesions, delineation of plaque morphology, and estimation of degree of internal carotid artery stenosis. METHODS Spiral CT angiography with a maximum intensity projection technique was compared with selective digital subtraction angiography (...

2012
George K.C. Wong Simon C.H. Yu Wai Sang Poon

After aneurysmal subarachnoid hemorrhage, most center practices treatment modality selection based on size and geometry in computed tomographic angiography. However, the validity as compared to digital subtraction angiography (DSA) is not well studied. Twenty patients with ruptured internal carotid artery aneurysm were identified in a two-year period. Mean difference in measurements from 3D com...

Journal: :AJNR. American journal of neuroradiology 1996
R K Tu W A Cohen K R Maravilla W H Bush N H Patel J Eskridge H R Winn

PURPOSE To optimize parameters of rotational angiography for examination of the internal carotid circulation; to compare rotational angiography with standard digital subtraction angiography (DSA) in the evaluation of aneurysms of the intracranial internal carotid circulation; and to determine tolerance and safety limits of prolonged internal carotid injection angiography. METHODS Rotational a...

Journal: :AJNR. American journal of neuroradiology 2004
Hyun-Seung Kang Moon Hee Han Bae Ju Kwon Sung Il Jung Chang-Wan Oh Dae Hee Han Kee-Hyun Chang

BACKGROUND AND PURPOSE Postsurgical evaluation of patients with intracranial aneurysms is important because there is a risk of regrowth and subarachnoid hemorrhage from residual aneurysms. We assessed the role and value of 3D angiography in this evaluation. METHODS Images from both 3D angiography and digital subtraction angiography (DSA) were preoperatively obtained in 71 consecutive patients...

Journal: :Radiology 2005
Clemence L Froger Lucien E M Duijm Ylian S Liem Alexander V Tielbeek Astrid B Donkers-van Rossum Petra Douwes-Draaijer Philippe W M Cuypers Jaap Buth Harrie C M van den Bosch

PURPOSE To prospectively assess three-dimensional contrast material-enhanced magnetic resonance (MR) angiography for stenosis depiction in malfunctioning hemodialysis arteriovenous fistulas (AVFs) and grafts (AVGs), as compared with digital subtraction angiography (DSA). MATERIALS AND METHODS Ethical review board approval and written informed consent were obtained. MR angiography and DSA were...

Journal: :Bali Medical Journal 2022

Spine vascular lesions like brain include spinal cord stroke, malformation such as venous or angioma, cavernous malformation, arteriovenous fistula. Embryogenesis of is the basic principle to understand spine. This study aims report serial cases with review lesions. MR angiography techniques contrast injection may reflect direction flow epidural veins describe site arterial feeders. Serpiginous...

Journal: :Radiology 2009
Rotem S Lanzman Adina Voiculescu Clemens Walther Adrian Ringelstein Xiaoming Bi Peter Schmitt Sonja-Marie Freitag Sora Won Axel Scherer Dirk Blondin

PURPOSE To evaluate noncontrast material-enhanced steady-state free precession (SSFP) magnetic resonance (MR) angiography in the assessment of transplant renal arteries (RAs) by using digital subtraction angiography (DSA) as the reference standard. MATERIALS AND METHODS This prospective study was approved by the institutional review board; written informed consent was obtained from all partic...

Journal: :AJNR. American journal of neuroradiology 1999
V J Kähärä S K Seppänen P S Ryymin P Mattila T Kuurne E M Laasonen

BACKGROUND AND PURPOSE Intra-arterial contrast angiographies are generally used to confirm treatment results of endovascular neurointerventions such as aneurysm obliteration. We compared MR angiography with digital subtraction angiography (DSA) as a follow-up technique for the detection of aneurysmal remnant cavities and arterial patency in patients treated for intracranial aneurysms with Gugli...

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