Track topics on Twitter Track topics that are important to you
Carotid artery stenting (CAS) requires adequate follow-up imaging to assess complications such as in-stent stenosis or occlusion. Options include digital subtraction angiography, CT angiography, ultrasound, and MR angiography (MRA), which may offer a non-invasive option for CAS follow-up imaging. The aim of this study was to assess contrast-enhanced MRA (CE-MRA) and three-dimensional time-of-flight MRA (3D-TOF) for visualization of the in-stent lumen in different carotid stents.
In this study, we compared CE-MRA and 3D-TOF of five different carotid stents (Guidant Acculink(R), Cordis Precise(R), Boston Wallstent(R), Abbot Vascular Xact(R), Cook Zilver(R)) in three diameters (4, 6, and 8 mm) using a vascular flow model at 3.0 T with the help of a recently developed carotid surface coil. Stent-related artifacts were objectively assessed by calculating artificial lumen narrowing (ALN) and relative in-stent signal (RIS).
RIS and ALN depended heavily on stent type, stent diameter, and the employed MR sequence. ALN and RIS were relatively favorable for Acculink(R), Precise(R), and Zilver(R) stents with both CE-MRA and 3D-TOF. CE-MRA provided better results for the Wallstent, while the Xact stent was difficult to visualize with both MRA protocols.
Both CE-MRA and 3D-TOF are viable options for depicting the in-stent lumen in carotid stents. For specific stents, 3D-TOF provided image quality comparable to CE-MRA and may thus be suitable for in vivo assessment. Development of stent-specific pathways for follow-up imaging seems advisable to address stent-related differences in image quality.
Department of Neuroradiology, University of Göttingen Medical School, Robert-Koch-Str. 40, 37075, Göttingen, Germany, firstname.lastname@example.org.
This article was published in the following journal.
Extracranial carotid pseudoaneurysms are uncommon vascular lesions. Even with conservative management complications can arise, such as delayed cerebral embolization or symptoms due to flow-limitation....
In this case series, we selected four patients with asymptomatic severe carotid stenosis due to unstable plaques, which were identified with contrast-enhanced ultrasound (CEUS). These patients underwe...
The optical coherence tomography angiography (OCTA) microvascular features of branch and central retinal artery occlusion are described and correlated with fluorescein angiographic and clinical findin...
This report presents the 30-day results of the Safety and Efficacy Study for Reverse Flow Used During Carotid Artery Stenting Procedure (ROADSTER) multicenter trial and evaluates the safety and effica...
Abnormal choroidal blood flow is considered important in the pathogenesis of chronic central serous chorioretinopathy (CSC). Optical coherence tomography (OCT) angiography can image ocular blood cell ...
PURPOSE: The purpose of this clinical trial is to study the cost-effectiveness ratios of diagnostic strategies for the imaging assessment of symptomatic carotid stenosis. MATERIALS AND ME...
To compare the 30-day safety and efficacy of the GORE Flow Reversal System when used with approved carotid stents to an Objective Performance Criterion derived from distal embolic protecti...
The study will evaluate the efficacy and safety of Dotarem enhanced MRA in patients suffering from carotid or vertebral arterial disease.
The purpose of this study is to evaluate the potential benefit of systematic preoperative coronary angiography followed by selective coronary artery revascularization on the incidence of m...
The goal of the proposed study is to contrast the relative efficacy of closed-cell stents versus open-cell stents in preventing periprocedural cerebral embolization in high-risk patients w...
Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.
Stents that are covered with materials that are embedded with chemicals that are gradually released into the surrounding milieu.
Damages to the CAROTID ARTERIES caused either by blunt force or penetrating trauma, such as CRANIOCEREBRAL TRAUMA; THORACIC INJURIES; and NECK INJURIES. Damaged carotid arteries can lead to CAROTID ARTERY THROMBOSIS; CAROTID-CAVERNOUS SINUS FISTULA; pseudoaneurysm formation; and INTERNAL CAROTID ARTERY DISSECTION. (From Am J Forensic Med Pathol 1997, 18:251; J Trauma 1994, 37:473)
Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.
The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells. In vertebrates, it is composed of blo...
A stent is a small mesh tube that's used to treat narrow or weak arteries. Arteries are blood vessels that carry blood away from your heart to other parts of your body. A stent is placed in an artery as part of a procedure called angioplasty. &...