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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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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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 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 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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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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Dr. Valentin Tissot (CHRU, Brest, France) presents cases throughout the whole body that demonstrate that Simultaneous Multi-Slice (SMS) helps to accelerate diffusion-weighted imaging in almost all clinical cases where DWI is commonly applied. Robust results and good image quality can be achieved with an SMS factor of 2, which allows one to achieve near 2-fold acceleration. He also shows that ADC values are highly reproducible between the conventional and the accelerated technique.
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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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Clinical History: This 5-year old boy presented with an acute headache and vomiting for 12 hours. The patient had a clinical history of cholesteatoma surgery in the recent past, involving the right mastoid. Diagnosis: Brain abscess MR Technique: Contrast-enhanced brain MR imaging was performed on a 3T system following an unenhanced CT scan […]
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A 3 year-old girl, product of in vitro fertilization (with a normal twin), delivered by c-section at 30 weeks. She is mildly developmentally delayed, with spastic diplegic/triplegic cerebral palsy.
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Standardized Quality and Process Efficiency with High-Throughput MR Exams. MR 2015 Garmisch (Germany), 16th International MRI Symposium. January 30, 2015.
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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.
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Pathologic perfusion is sometimes the reason and often the consequence of brain pathologies. Evaluation of perfusion with dynamic susceptibility-weighted imaging is a well understood and established method to evaluate these changes. In this article, Binesh et al. (Cedars Sinai Medical Center, Los Angeles) show step-by-step how they apply this method and present four case reports illustrating the usefulness of perfusion imaging in clinical practice.
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Neurology is the largest field of application for MRI. In their article the authors give a comprehensive introduction to advanced techniques in neuroimaging. Learn more about fMRI, DTI, DWI, ASL, SWI and many other techniques that go beyond standard imaging.
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Susceptibility weighted imaging well demonstrates microhemorrhages within the brain. In CAA, these involve the cortex and subcortical white matter within the frontal and parietal lobes. This is in distinction to hypertensive microangiopathy, where microhemorrhages occur in deep white matter as well as infratentorially.
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This is a pictorial review of susceptibility- weighted imaging (syngo SWI) using a MAGNETOM Trio system with software version syngo MR B15 and a 32-channel head coil at The Geelong Hospital, Victoria, Australia. syngo SWI is a 3D FLASH sequence that is flow compensated in slice, read and phase directions.
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This is a 21-year-old male with recent headaches. The headaches are described as intermittent throbbing and result in numbness, tingling, and blurred vision.
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22 year old man with left sided sensory seizures. The seizures are of focal onset, typically affecting the left arm and shoulder, with radiation to the entire left side within 2-3 seconds. He describes the seizures as an electric burning feeling that “is not pain”.
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27 yr old woman presented with sudden onset of hearing loss in the right ear, severe headache, dizziness, double vision six years ago. MRI of the brain at that time revealed an incidental finding of capillary telangiectasia in the right pons. During recent visit to the hospital follow up MRI was performed.
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This 43-year-old female presented to clinic with a severe headache and neck neck pain for the last two weeks. This was associated with intermittent mental status changes.
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This 62-year-old woman presented with a six month history of nausea and vomiting. Recently, the woman complains of dysosmia, experiencing the smell of ammonia. These dysosmiac episodes last for several minutes but have recently increased in frequency.
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This 54 year old female patient presented with subtle, progressive, partial loss of sight involving the left eye. Clinical exam showed papilledema and atrophy of the optic nerve on the left.
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This 24-year-old woman presented clinically with ongoing intermittent headaches most severe in the frontal region. On physical exam, she was found to have bilateral optic atrophy and a right homonymous hemianopia. The patient was noted to have a mass on subsequent CT and MRI examinations. She underwent a frontal temporal biospy of the mass which pathologically confirmed the presence of a germinoma.
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This 53-year-old woman presented to oncology clinic complaining of new-onset headaches over the last week. In particular, these occurred intermittently, involving the region of her right eye. She also reported new-onset diplopia. The patient had a history of cervical cancer with metastatic lesions to her lungs, which were found 6 months previous. The patient’s MR examination is given, and endoscopic transnasal tumor resection was subsequently performed.
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This 64-year-old man presented clinically with a complaint of vision loss over the last year. Ophthalmologic exam revealed a bitemporal hemianopsia and the patient was referred for MRI. A prolactin level was normal. The lesion was subsequently resected via an intranasal approach.
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This 23-year-old male presented to the emergency room complaining of new-onset seizures. A subsequent MR examination revealed intra-axial large brain mass. This was found to be a low-grade glioma. This mass was biopsied and found to represent a low-grade oligo-astrocytoma.
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This 31-year-old man presented to the neurology department with progressive dizziness for two months along with new-onset seizures, vomiting, and weakness. He reported no history of fever or traumatic head injury. An MRI was performed for further assessment.
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This 35-year-old woman presented to neurology clinic with a one week history of increasing confusion and new-onset seizures. Following MRI illustrated here, the patient underwent surgical treatment for the lesion illustrated herein.
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This 35-year-old man presented to the emergency department complaining of intermittent headaches, paresthesias, and weakness of his left thumb for nine days. The patient reported a history of fever along with these symptoms. After the MRI examination illustrated herein, the patient underwent successful surgical treatment.
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