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Assessment and Classification of Peripheral Vascular Anomalies by Time-Resolved MRA using TWIST.

July 6, 2013 by
Vascular malformations (VM) are complex lesions present in various anatomical locations with a variety of clinical manifestations. Time-resolved MRA combined with parallel imaging and echo sharing schemes offer a reasonable alternative to more invasive diagnostic methods such as digital subtraction angiography (DSA) in evaluation of VMs. MRI is becoming the imaging modality of choice in assessing morphological issues regarding VMs. Time-resolved MRA can play an important role in characterizing these lesions and can influence therapeutic decision-making. [...]
Filed Under: Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, Vessels
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An Overview of Imaging Techniques for the Carotid Bifurcation

July 6, 2013 by
Because it has been proven that there is a link between the development of nephrogenic systemic fibrosis (NSF) and the application of high volumes of magnetic resonance (MR) contrast agents in patients with impaired renal function, interest in non-contrast-enhanced techniques for MR angiography has experienced a renaissance. This set of images presents 5 different techniques for imaging the carotid bifurcation, one of the most critical and commonly diseased vascular regions within the entire arterial system. Except one (D), for best comparability, all exams were acquired with the same spatial resolution of 0.9 x 0.9 x 0.9 mm3 at 3 T (Magnetom Verio, Siemens Medical Solutions). [...]
Filed Under: Anatomic Regions, carotid arteries, Cases, Clinical Imaging, Clinical Methods & Techniques, Meet The Experts, neck (soft tissues therein), Stefan Schönberg
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Assessment and Classification of Peripheral Vascular Anomalies by Time-Resolved MRA using TWIST

July 6, 2013 by
Vascular malformations are complex lesions with a variety of clinical manifestations. Time-resolved MRA combined with parallel imaging and echo sharing schemes represents a reasonable alternative to more invasive DSA for the evaluation of VMs. Therefore, time-resolved MRA can play an important role in categorizing these lesions and determining their extent in order to correctly guide treatment. [...]
Filed Under: Clinical Imaging, Clinical Methods & Techniques, soft tissues, Software & Hardware Updates
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syngo TWIST for Dynamic Time-Resolved MR Angiography

July 6, 2013 by MRI
3D dynamic imaging has been available since the late 90s. The speed of dynamic imaging was subsequently improved due to advances in gradient design, for example current 40 mT/m gradients. Since then, dynamic imaging has gone through several changes and improvements, including the implementation of parallel imaging, and more recently, the new k-space coverage now available with TWIST (a 4D MRA application). TWIST achieves significant improvements in temporal and spatial resolution and faster tracking of dynamic processes relative to the other versions of dynamic imaging introduced earlier. TWIST offers a practical, flexible, and elegant way to perform sub-second, time-sequential 3D measurements, both at 1.5 T and 3 T. This can be used in combination with contrast injection to provide dynamic clinical information, including the evaluation of abnormal vascular anatomy as well as vascular hemodynamics, and perfusion measurements. [...]
Filed Under: Clinical Imaging, neck (soft tissues therein), Software & Hardware Updates
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Let’s TWIST again: Temporal and Spatial High-Resolution 3D MR-Angiography of the Hand

July 6, 2013 by
Compared to conventional contrastenhanced MR angiography (MRA), which provides a spatial high-resolution threedimensional (3D) MRA data set of the vascular target region, MRA with TWIST (time-resolved angiography with stochastic trajectories) with its high temporal resolution offers an additional dynamic component. It presents a broad range of advantages for all vascular diagnostic questions where blood flow dynamics play a role. [...]
Filed Under: Clinical Imaging, Clinical Updates, hand, Software & Hardware Updates, the joints
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Case Report: syngo TimCT – MR Angiography in Clinical Routine

July 5, 2013 by
Studies at the University Medical Center in Mannheim, Germany show that the continuous moving table MRA approach is a major improvement in imaging the lower extremities in a clinical setting as it combines an easy, fast and robust workflow with good clinical results and is applicable to a broad range of patients. [...]
Filed Under: arteries in the abdomen/pelvis, arteries in the legs, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates
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