Dynamic MR venography: An intrinsic benefit of time-resolved MR angiography

2006 ◽  
Vol 24 (4) ◽  
pp. 922-927 ◽  
Author(s):  
Jiang Du ◽  
Frank J. Thornton ◽  
Charles A. Mistretta ◽  
Thomas M. Grist
Keyword(s):  
Mr Angiography ◽  
Mr Venography ◽  
Time Resolved ◽  
Dynamic Mr

Time-resolved MR angiography of the intracranial venous system: an alternative MR venography technique

2011 ◽  
Vol 22 (5) ◽  
pp. 980-989 ◽  
Author(s):  
Hasan Yiğit ◽  
Aynur Turan ◽  
Elif Ergün ◽  
Pınar Koşar ◽  
Uğur Koşar
Keyword(s):  
Mr Angiography ◽  
Venous System ◽  
Mr Venography ◽  
Time Resolved

Time-resolved, contrast-enhanced 3D MR angiography in the subclavian steal effect

VASA ◽  
2010 ◽  
Vol 39 (1) ◽  
pp. 85-93 ◽  
Author(s):  
Schubert
Keyword(s):  
Mr Angiography ◽  
Time Resolved ◽  
Time To Peak ◽  
Vertebral Arteries ◽  
Subclavian Steal ◽  
Cerebrovascular Events ◽  
Graphic Analysis ◽  
Contrast Enhanced ◽  
Hemodynamic Information ◽  
Supraaortic Vessels

The subclavian steal effect indicates atherosclerotic disease of the supraaortic vessels but rarely causes cerebrovascular events in itself. Noninvasive imaging providing detailed anatomic as well as hemodynamic information would therefore be desirable. From a group of 25 consecutive patients referred for MR angiography, four with absent or highly attenuated signal in one of the vertebral arteries on 3D multislab time-of-flight MR angiography were selected to undergo 3D time-resolved contrast-enhanced MR angiography. The time-resolved 3D contrast series (source images and MIPs) were evaluated visually and by graphic analysis of time-intensity curves derived from the respective V1 and V3 segments of both vertebral arteries on the source images. In two cases with high-grade proximal left subclavian stenosis, time-resolved 3D ce-MRA was able to visualise retrograde contrast filling of the left VA. There was a marked delay in time-to-peak between the left and right V1 segments in one case and a shallower slope of enhancement in another. In the other two cases, there was complete or collateralised segmental occlusion of the VAs.

scholarly journals Contrast-Enhanced Magnetic Resonance Angiography Using a Novel Elastin-Specific Molecular Probe in an Experimental Animal Model

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Carolin Reimann ◽  
Julia Brangsch ◽  
Jan Ole Kaufmann ◽  
Lisa C. Adams ◽  
David C. Onthank ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Image Quality ◽  
Magnetic Resonance Angiography ◽  
Contrast Agent ◽  
Mr Angiography ◽  
Molecular Probe ◽  
Time Resolved ◽  
Clinical Dose ◽  
Contrast Enhanced ◽  
First Pass

Objectives. The aim of this study was to test the potential of a new elastin-specific molecular agent for the performance of contrast-enhanced first-pass and 3D magnetic resonance angiography (MRA), compared to a clinically used extravascular contrast agent (gadobutrol) and based on clinical MR sequences. Materials and Methods. Eight C57BL/6J mice (BL6, male, aged 10 weeks) underwent a contrast-enhanced first-pass and 3D MR angiography (MRA) of the aorta and its main branches. All examinations were on a clinical 3 Tesla MR system (Siemens Healthcare, Erlangen, Germany). The clinical dose of 0.1 mmol/kg was administered in both probes. First, a time-resolved MRA (TWIST) was acquired during the first-pass to assess the arrival and washout of the contrast agent bolus. Subsequently, a high-resolution 3D MRA sequence (3D T1 FLASH) was acquired. Signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were calculated for all sequences. Results. The elastin-specific MR probe and the extravascular imaging agent (gadobutrol) enable high-quality MR angiograms in all animals. During the first-pass, the probes demonstrated a comparable peak enhancement (300.6 ± 32.9 vs. 288.5 ± 33.1, p>0.05). Following the bolus phase, both agents showed a comparable intravascular enhancement (SNR: 106.7 ± 11 vs. 102.3 ± 5.3; CNR 64.5 ± 7.4 vs. 61.1 ± 7.2, p>0.05). Both agents resulted in a high image quality with no statistical difference (p>0.05). Conclusion. The novel elastin-specific molecular probe enables the performance of first-pass and late 3D MR angiography with an intravascular contrast enhancement and image quality comparable to a clinically used extravascular contrast agent.

scholarly journals Time-resolved, high-resolution contrast-enhanced MR angiography of dialysis shunts using the CENTRA keyhole technique with parallel imaging

2007 ◽  
Vol 25 (4) ◽  
pp. 832-840 ◽  
Author(s):  
Katja A. Mende ◽  
Johannes M. Froehlich ◽  
Constantin von Weymarn ◽  
Romhild Hoogeveen ◽  
Thomas Kistler ◽  
...  
Keyword(s):  
High Resolution ◽  
Mr Angiography ◽  
Parallel Imaging ◽  
Time Resolved ◽  
Contrast Enhanced

scholarly journals Pulmonary arteriovenous malformation: Characterization with time-resolved ultrafast 3D MR angiography

2001 ◽  
Vol 13 (3) ◽  
pp. 458-460 ◽  
Author(s):  
Mathias Goyen ◽  
Stefan G. Ruehm ◽  
Andreas Jagenburg ◽  
Jörg Barkhausen ◽  
Knut Kröger ◽  
...  
Keyword(s):  
Arteriovenous Malformation ◽  
Mr Angiography ◽  
Pulmonary Arteriovenous Malformation ◽  
Time Resolved

State of the venous system in patients with Pseudotumor cerebri

2021 ◽  
Vol 26 (2) ◽  
pp. 37-42
Author(s):  
N. V. Shuleshova ◽  
N. I. Panchenko ◽  
I. V. Kupriyanova
Keyword(s):  
Mr Angiography ◽  
Vascular System ◽  
Pseudotumor Cerebri ◽  
Mr Venography ◽  
Venous Outflow ◽  
Brain Vessels ◽  
Pseudotumor Cerebri Syndrome ◽  
Visual Disorders ◽  
The Brain

The article describes two clinical cases of idiopathic intracranial hypertension, the first manifestation of which was the development of retroorbital headache and the visual disorders. Leading in the clinical picture of the disease in both cases was the detection of stagnant optic nerve discs on the fundus. In both patients, the vascular system of the brain was examined using duplex scanning of the neck and brain vessels, MR angiography and MR venography, and in one case — SCT angiography, a lumbar puncture was performed with the study of cerebrospinal fluid (CSF). An increase in CSF pressure was found, accompanied by changes in the large venous vessels of the skull and brain. This suggests a significant role of venous outflow disorders in the development of Pseudotumor cerebri syndrome.

scholarly journals Combining Time-resolved and Single-phase 3D Techniques in Contrast-enhanced Carotid MR Angiography

2002 ◽  
Vol 1 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Makoto SASAKI ◽  
Hirobumi OIKAWA ◽  
Kunihiro YOSHIOKA ◽  
Yoshiharu TAMAKAWA ◽  
Hiromu KONNO ◽  
...  
Keyword(s):  
Mr Angiography ◽  
Single Phase ◽  
Time Resolved ◽  
Contrast Enhanced
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