MAGNETOM Aera – Combining Throughput and Highest Quality MR Angiography in an Optimized Clinical Workflow

This paper shows how the simultaneous use of multipurpose loop coils in MRI allows high-resolution musculoskeletal studies with increased contrast and specificity for assessing muscles, tendons, ligaments, joints, and cartilage. Dr. Ferrer presents a number of different daily patient routine examinations, including specifically evaluation of the carpal bones, the thumb metacarpals, the metacarpals, the distal inter-phalangeal joints, the elbow and ankle. [...]

Carotid artery pseudoaneurysm

Trauma [...]

Multiple Arterial Stenoses

This 63-year-old man presented with a longstanding history of peripheral arterial occlusive disease, hypertension, diabetes, coronary artery disease, prior myocardial infarction, crossover bypass, and renal artery stenosis with increasing leg pain. [...]

Metastatic Melanoma

This 36-year-old patient presented in December 2006 with a suspicious mole on the right lower leg which was surgically removed. Histopathology demonstrated a malignant melanoma. 2.5 years later the patient presented with an inguinal lymph node metastasis on the right side detected on lymph node dissection. MRI was ordered to further evaluate the right leg on which additional cutaneous lesions were noted. [...]

Contrast Enhanced MRA of Dissection of the Carotid Artery

This 69-year-old man presented to the angiography department with a single episode of amaurosis fugax 6 months ago. Since that time he has been treated with thrombocyte aggregation inhibitors. Clinical symptomatology includes headaches and vertigo. [...]

An Overview of Imaging Techniques for the Carotid Bifurcation

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). [...]

Contrast Enhanced MRA of the Renal Arteries, with Renal Artery Stenosis

This 64-year-old man presented with an increased serum creatinine level (2.77 mg/dL) and significant asymmetry of renal size (reduced on the right) on ultrasound. The past medical history was pertinent for prior stenting of the right renal artery. [...]

MRA – False Aneurysm of the Renal Artery

This 71-year-old man presented to the emergency room with a fever up to 39°C and a general decline in his state of health. Two weeks previously, he underwent a partial resection of the right kidney due to suspected renal cell carcinoma, that turned out to be an hemorrhagic cyst. [...]

Contrast Enhanced MRA of a Pelvic Arteriovenous Malformation

This 43-year-old woman presented to the angiography department three years ago with pain in the lower abdomen. She underwent resection of an intrauterine fibroma in 1997 and a C-section in 2002. In September 2005, the question was raised regarding a possible malformation of iliac vessels on the left side. [...]

Continuous table movement MRA for diagnosis of generalized atherosclerotic disease

This 48 year old woman presented to the department of vascular surgery due to recurrent pain in both legs. She suffers from hypertension, hyperlipidemia and coronary artery disease. She has previously been diagnosed with a high-grade stenosis of the right internal carotid artery and occlusion of the left internal carotid artery, andis as well status post dilatation and stenting of the circumflex coronary artery. Additional relevant vascular disease and surgery include occlusion of the right subclavian artery, aortobifemoral bypass grafting due to high-grade stenosis, and occlusion of the common, external and internal iliac arteries on both sides. [...]

Juvenile Nasopharyngeal Angiofibroma

16 year-old male presenting with difficulty breathing through his nose, nightly snoring, stridor and recurrent infections of the upper airway. Inspection shows a red, tumor-like lesion along the posterior wall of the nasopharynx. [...]

Improved Workflow and Performance for Contrast-Enhanced MR Angiography Sequences

Recent improvements in TWIST (dynamic contrast enhanced MRA) and more conventional non-dynamic contrast enhanced MRA are discussed. [...]

syngo TWIST for Dynamic Time-Resolved MR Angiography

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. [...]

Let’s TWIST again: Temporal and Spatial High-Resolution 3D MR-Angiography of the Hand

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. [...]

Large FOV Imaging at 3T with a 32-Channel Body Array Coil

This article shows the benefits of a 32-channel body coil for large field-of-view imaging in the abdomen and pelvis, including MR Angiography. The evolution of parallel imaging techniques has been very rapid, with realization of their full potential requiring development and utilization of MR systems with up to 32 receiver channels. [...]

Case Report: syngo TimCT – MR Angiography in Clinical Routine

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. [...]

Contrast Agents: Optimization of Contrast-enhanced MRA

Ulrike I Attenberger, MD Department of Clinical Radiology and Nuclear Medicine University Medical Center Mannheim Mannheim, Germany  View Presentation [...]

Continuous Table Movement in MR Angiography – syngo Tim CT

Harald Kramer, MD Department of Clinical Radiology University Hospitals Munich – Grosshadern Munich, Germany [...]