The purpose of this study was to evaluate the clinical feasibility of isotropic high-resolution 3D-T1W-MRC using iterative denoising in comparison with conventional 3D-T2W-MRC for evaluation of the biliary anatomy of living liver donors.
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High acceleration factors using standard CAIPIRINHA acceleration for cartesian trajectories, in combination with a modern iterative denoising (ID) reconstruction algorithm, can be applied to 3D SPACE, maintaining image sharpness with high SNR, for either reduced scan time or higher spatial resolution.
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MRF represents a paradigm shift for reliable, repeatable, and consistent signal acquisition and modeling. The recent availability of this technique in the clinical realm may have a significant impact on tumor detection, characterization, and effective treatment planning.
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Magnetic resonance spectroscopic imaging (MRSI) of the brain today can be achieved with whole-brain coverage and finds useful application in patients with brain tumors.
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MR-guided Focused Ultrasound (MRgFUS) is a novel, groundbreaking technology that allows incisionless surgery. In essential tremor, the target spot is the Ventralis Intermidius Thalamic (Vim) nucleus, located in the hemisphere contralateral to the affected body part.
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Compressed sensing VIBE is a highly valuable tool for the diagnostic workup of complex uterine and adnexal pathologies and may facilitate improved staging of tumors and a more accurate evaluation of benign diseases.
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Image degradation due to respiratory motion remains a challenge for cardiac MR/PET imaging. Although novel approaches for MR/PET motion compensation have been
recently introduced, most of these schemes usually only acquire motion information from MRI data during the PET acquisition, and diagnostic MR data afterwards.
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Image degradation due to respiratory motion remains a challenge for cardiac MR/PET imaging. Although novel approaches for MR/PET motion compensation have been
recently introduced, most of these schemes usually only acquire motion information from MRI data during the PET acquisition, and diagnostic MR data afterwards.
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Moyamoya disease requires follow-up for a long period of time, and ASL is very well suited for the evaluation of this disease. The multi-PLD PCASL is significant as a screening tool because it provides information on whole-brain perfusion distribution in a 3D rCBF map as well as information on pseudo hemodynamics.
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Moyamoya disease requires follow-up for a long period of time, and ASL is very well suited for the evaluation of this disease. The multi-PLD PCASL is significant as a screening tool because it provides information on whole-brain perfusion distribution in a 3D rCBF map as well as information on pseudo hemodynamics.
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Moyamoya disease requires follow-up for a long period of time, and ASL is very well suited for the evaluation of this disease. The multi-PLD PCASL is significant as a screening tool because it provides information on whole-brain perfusion distribution in a 3D rCBF map as well as information on pseudo hemodynamics.
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Advanced multi-modal MRI has the potential to simplify the patient’s presurgical workup, obviate the need for intracranial EEG monitoring and electrical stimulation, improve postoperative seizure outcome, and avoid or minimize postoperative neurological deficits.
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In the world of social media, the relationship between pediatrics and MRI would be: “It’s complicated.” Most important regardless is that MRI is a completely radiation-free technique, making it an excellent tool of first choice…
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3D Localization is an efficient and reliable way to localize cardiac views, especially in unfamiliar anatomical territory e.g. complex cardiomyopathies, post- surgical changes, or animal scans. For new trainees, the ability to visualize anatomy in 3D also promotes a better understanding and appreciation of the required angulations.
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3D Localization is an efficient and reliable way to localize cardiac views, especially in unfamiliar anatomical territory e.g. complex cardiomyopathies, post- surgical changes, or animal scans. For new trainees, the ability to visualize anatomy in 3D also promotes a better understanding and appreciation of the required angulations.
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3D Localization is an efficient and reliable way to localize cardiac views, especially in unfamiliar anatomical territory e.g. complex cardiomyopathies, post- surgical changes, or animal scans. For new trainees, the ability to visualize anatomy in 3D also promotes a better understanding and appreciation of the required angulations.
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Given that liver fibrosis is often spatially heterogeneous, the volume of liver sampled is considered one of the key advantages of MR Elastography compared with liver biopsy and ultrasound elastography. GRE type sequences appear to be the best choice in patients with normal iron concentrations in the liver, while SE-EPI appears to be superior for patients with iron overload.
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Arterial spin labeling (ASL) is an MR perfusion technique which uses magnetically labeled arterial blood as tracer for measuring local tissue perfusion [1–4].
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Arterial spin labeling (ASL) is an MR perfusion technique which uses magnetically labeled arterial blood as tracer for measuring local tissue perfusion [1–4].
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Current research at the Department of Nutrition and Movement Sciences at Maastricht University is focused on the long-term impact of specific dietary components and physical exercise on both CBF and cognitive performance. We primarily target overweight and slightly obese elderly while using ASL to quantify changes in (regional) CBF.
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3D PCASL can be used for non-invasive monitoring of metabolic and functional correlates of a stroke lesion, both in the acute and chronic phase, and to evaluate areas beyond the local tissue damage.
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Thoracic outlet syndrome is a condition in which nerves, arteries or veins are compressed. This can lead to pain, weakness, and occasionally loss of muscle at the base of the thumb. Occationally, these cases are referred to MRI and the article describes how such scans can be performed easily, efficiently, and accurately.
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This liver workflow makes better use of the time between the dynamic and liver-specific phases – by shifting the time consuming acquisition of high-res T2w images and DWI to after the contrast injection and – by shortening the delay between contrast dynamics and the acquisition of hepatobiliary phase images. The protocols allow to perform a complete Primovist liver exam in a 30-minute exam slot.
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Shortening average examination times by 50% – the first experiences with 1.5T MAGNETOM Sola with BioMatrix technology are presented in this article.
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To assess preoperative Short Course Radiotherapy (SCR) tumor response in locally advanced rectal cancer (LARC) by means of parameters derived from Standardized Index of Shape (SIS) dynamic contrast enhanced (DCE) MRI, Apparent Diffusion Coefficient (ADC), Intravoxel Incoherent Motion and Diffusion Kurtosis Imaging derived parameters by diffusion weighted (DW) MRI.
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Crude rates of symptomatic cardiac toxicity in esophageal carcinoma are reportedly 10.8% [1]. Cardiac manifestations including clinical findings such as pericardial effusion, arrhythmia, ischemia and cardiomyopathy, typically occur between 4 to 24 months following thoracic radiation [2, 3].
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To evaluate the diagnostic potential of perfusion parameters derived from dynamic contrast-enhanced MR imaging (DCE-MRI), diffusion kurtosis imaging (DKI), and parameters derived from the intravoxel incoherent motion model (IVIM)-based diffusion weighted imaging (DWI) in differentiating between pancreatic tumors and normal pancreatic parenchyma.
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This article introduces a web-based software designed specifically to integrate spectroscopic MRI with clinical imaging, enabling physicians to evaluate metabolic activity, review underlying spectra on a voxel-basis, and delineate target volumes for RT planning. By making whole-brain spectroscopic MRI more accessible for clinical decision-making and treatment decisions through an easy-to-use, collaborative web application, we can improve patient outcomes and drive the future of state-of-the-art glioblastoma care.
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Body composition measurements, such as adipose tissue compartments, muscle volumes, and muscle tissue composition are increasingly important in research and clinical context. This article introduces a protocol for robust neck-to-knee Dixon VIBE-based fat and water images at 3T.
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Body composition measurements, such as adipose tissue compartments, muscle volumes, and muscle tissue composition are increasingly important in research and clinical context. This article introduces a protocol for robust neck-to-knee Dixon VIBE-based fat and water images at 3T.
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MS follow-up leads to millions of brain MRI scans around the world. Depending on the number and size of inflammatory lesions, comparing successive exams to assess dissemination in time can be a challenging and lengthy process. Stéphane Cantin et al. (Grenoble, France) describes FLAIR image fusion with syngo.via, an easy to implement and cost-effective technique that allows faster and improved patient care compared to conventional frame-by-frame 3D FLAIR comparison.
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The article describes the experiences with REMyDI (Rapid Estimation of Myelin for Diagnostic Imaging), a method of myelin detection in the brain, using a scan time of approximately 6 minutes.
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The article describes the experiences with REMyDI (Rapid Estimation of Myelin for Diagnostic Imaging), a method of myelin detection in the brain, using a scan time of approximately 6 minutes.
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Fiducial markers need to fulfill many, sometimes competing, criteria when used for MRI based radiotherapy treatment planning. This article covers the development and optimization of markers.
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The MAGNETOM Lumina is a new 3T Open Bore system, incorporating artificial intelligence, matrix coils that automatically adjust to patient biovariability and parallel imaging/simultaneous multi-slice/compressed sensing technologies.
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New working methods are required that will enable hospitals to deal with the increasing workload and quality expectations despite having a smaller workforce at their disposal.
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Houda Bahig et al. describe their intensity modulated radiotherapy planning workflow with MRI for locally advanced head-and-neck cancer (HNC) and discuss the current role of MRI in HNC treatment planning.
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Transient motion developed in 40% of patients shortly after gadoxetic acid administration, and gated free-breathing T1WI using GRASP was able to consistently provide acceptable arterial phase imaging in patients who exhibited transient motion.
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Houda Bahig et al. describe their intensity modulated radiotherapy planning workflow with MRI for locally advanced head-and-neck cancer (HNC) and discuss the current role of MRI in HNC treatment planning.
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This review focuses on 8 critical questions regarding gadolinium deposition in the brain and body, with the answers and discussion therein important for future regulatory decisions and clinical practice.
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The DryCool magnet is a highly innovative development which incorporates many new technologies and concepts. The magnet delivers the first 80 cm patient bore in the industry and is a key enabler for the ground-breaking MAGNETOM Free.Max MRI scanner. The magnet minimizes product life-cycle costs and total cost of ownership and virtually eliminates the complex superconducting magnet servicing procedures.
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This paper reviews four recently published studies where RESOLVE was shown to be clinically effective in the diffusion-weighted imaging of sinonasal and optic pathologies. It also demonstrates the clinical value that RESOLVE brings to the detection and characterization of the diseases in these regions.
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This review focuses on 8 critical questions regarding gadolinium deposition in the brain and body, with the answers and discussion therein important for future regulatory decisions and clinical practice.
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This paper reviews four recently published studies where RESOLVE was shown to be clinically effective in the diffusion-weighted imaging of sinonasal and optic pathologies. It also demonstrates the clinical value that RESOLVE brings to the detection and characterization of the diseases in these regions.
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This article describes the feature ‘ADC & computed b-value’ available on Siemens’ syngo.via VB10. This new tool provides an increased degree of freedom in the choice of the b-value for disease detection and characterization.
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The article shows that targeted biopsies of the prostate under direct MRI-guidance are a reasonable complement to ultrasound biopsy techniques. The presented cases show that exact targeting of the most suspicious portion of a tumor is crucial for correct classification and consequently best therapy decisions. Especially in case of relatively small lesions, direct MR-guidance has clear advantages over fusion techniques.
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The article features the clinical and imaging signs and differential diagnosis of Retinoblastoma, persistent fetal vasculature and Coats’ disease. View/Download
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The established class of intravenous contrast media for magnetic resonance
imaging is the gadolinium chelates, more generally referred to as the
gadolinium-based contrast agents (GBCAs).
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These case reports show that current advances in T1 and T2 mapping and ECV quantification might have the potential to improve the diagnosis of cardiovascular disease, refine myocardial risk stratification and guide patient personalized therapeutic strategies. View/Download
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The article introduces a novel teaching approach allowing time-effective teaching as well as an ongoing quality control. The aim is to enable CMR in all settings – hospitals of different sizes as well as in outpatient departments.
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Erlangen, Germany, May 31, 2015 — Siemens announced at the Toronto ISMRM (International Society for Magnetic Resonance in Medicine) meeting the launch of the world’s first 7 T MR platform intended for clinical use. Important advances include a new, light, actively shielded magnet with zero helium boil-off and dual operating modes, enabling rapid switching between research […]
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The development ofmulti coil receiver hardware as well as dedicated parallel acquisition techniques (PAT) and respective reconstruction methods allowed for a significant decrease of acquisition times in almost all clinical applications. This article provides a brief overview of 2D- and MS-CAIPIRINHA.
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Simultaneous multi-slice acquisition with CAIPIRINHA reduces the scan time in diffusion-weighted MRI. In this article, early experience with this technique for accelerated DTI of skeletal muscle is shown.
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The presented case studies illustrate that SMS can increase the statistical confidence of fMRI and diffusion tractography results. These gains may be used to increase spatial image resolution and coverage, to improve spatial coregistration to high-resolution anatomical scans for intra-operative neuro-navigation, and / or to shorten acquisition times.
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Case presentation of non-contrast QISS MRA providing high diagnostic accuracy for the detection of hemodynamically significant arterial stenosis of the lower extremities at both 1.5 and 3T.
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The article introduces point-of-care MRI, an extremely focused and goal-directed examinations strategy, that could reduce examination time and patient comfort.
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In single shot EPI, the entirety of k-space is traversed after one shot (excitation). Readout-segmentation acquires k-space in multiple shots for reduced TE and encoding time. Real-time reacquisition of unusable shots is also supported.
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The high SNR available at 3T provides the ability to perform high-resolution MR neurography-guided perineural injections for highly accurate visualization of small nerve as well as needle targeting and perineural injection. This case report demonstrates how this techniques facilitates accurate targeting of the PFCN. Download/View PDF
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The article describes a new MRI myelin detection model to measure the presence of myelin by its effect on the surrounding cellular water, and discusses clinical applications of this technique. Download/View PDF
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The fit-upgrade for 1.5 and 3T systems remains an economically attractive approach for an aged MR system. By improving system performance and workflow, the number of examinations can be increased, together with improved image quality, with little effort. Download/View PDF
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Whole-body MRI is beneficial in many clinical scenarios including bone marrow, infectious and rheumatic diseases. The Whole-Body Dot Engine provides fast and robust image quality across all patients, with fewer errors or need for repeated examinations. It ensures that all stations of a multi-station examination are performed with a consistent FOV and spatial resolution while […]
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This educational exhibit was presented at the ASNR 2015 meeting, with imaging performed on a 3 T Siemens Skyra MR system. The full reference for the exhibit is given below. Runge V, Smoker W, Valavanis A. Pearls and Pitfalls in Neuroradiology of Cerebrovascular Disease – The Essentials with MR and CT. ASNR 53rd Annual Meeting, […]
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