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https://www.readbyqxmd.com/read/28214787/sparse-and-dense-hybrid-representation-via-subspace-modeling-for-dynamic-mri
#1
Qiegen Liu, Shanshan Wang, Dong Liang
Recent theoretical results on compressed sensing and low-rank matrix recovery have inspired significant interest in joint sparse and low rank modeling of dynamic magnetic resonance imaging (dMRI). Existing approaches usually describe these two respective prior information with different formulations. In this paper, we present a novel sparse and dense hybrid representation (SDR) model which describes the sparse plus low rank properties by a unified way. More specifically, under the learned dictionary consisting of temporal basis functions, SDR models the spatial coefficients in two subspaces with Laplacian and Gaussian prior distributions, respectively...
February 5, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28214680/exploring-the-role-of-testosterone-in-the-cerebellum-link-to-neuroticism-from-adolescence-to-early-adulthood
#2
Dennis J L G Schutter, Rosa Meuwese, Marieke G N Bos, Eveline A Crone, Jiska S Peper
Previous research has found an association between a smaller cerebellar volume and higher levels of neuroticism. The steroid hormone testosterone reduces stress responses and the susceptibility to negative mood. Together with in vitro studies showing a positive effect of testosterone on cerebellar gray matter volumes, we set out to explore the role of testosterone in the relation between cerebellar gray matter and neuroticism. Structural magnetic resonance imaging scans were acquired, and indices of neurotic personality traits were assessed by administering the depression and anxiety scale of the revised NEO personality inventory and Gray's behavioural avoidance in one hundred and forty-nine healthy volunteers between 12 and 27 years of age...
January 29, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28214652/unilateral-oculomotor-palsy-in-charcot-marie-tooth-disease-1a-cmt-1a
#3
A Posa, A Emmer, M E Kornhuber
BACKGROUND: Charcot-Marie-Tooth disease (CMT) type 1A is the most common form of CMT 1 and one of the autosomal dominant demyelinating hereditary motor and sensory neuropathies (HMSN). Cranial nerves may be frequently subclinically affected in CMT disease. However manifest clinical signs of cranial nerve involvement are rare. METHODS: This case comprise neurological, ophthalmological, internal medicine and ear-nose-throat investigation, motor and sensory nerve conduction velocity, auditory evoked potentials and orbicularis-oculi reflex measurements, lumbar puncture and blood examination, inclusive molecular genetic testing, as well as electrocardiogram and cranial imaging such as computer tomography and magnetic resonance imaging RESULTS: The present case shows a Charcot-Marie-Tooth (CMT) 1A patient with complete unilateral oculomotor palsy in combination with predominant ipsilateral subclinical trigeminal demyelination...
February 13, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28214642/short-term-results-of-carotid-endarterectomy-and-stenting-after-the-introduction-of-carotid-magnetic-resonance-imaging-a-single-institutional-retrospective-study
#4
Ryu Fukumitsu, Kazumichi Yoshida, Yoshitaka Kurosaki, Koichi Torihashi, Nobutake Sadamasa, Masaomi Koyanagi, Osamu Narumi, Tsukasa Sato, Masaki Chin, Akira Handa, Sen Yamagata, Susumu Miyamoto
OBJECTIVE: While carotid artery stenting (CAS) has been gaining popularity as an alternative to carotid endarterectomy (CEA), the perioperative stroke rate following contemporary CAS remains significantly higher than that in CEA. The purpose of this study was to assess perioperative (within 30-day) therapeutic results in patients with carotid stenosis (CS) after the introduction of preoperative carotid magnetic resonance plaque evaluation in a single center offering both CEA and CAS. METHODS: Based on prospectively collected data for patients with CS who were scheduled for carotid revascularization, retrospective analysis was conducted of 295 consecutive CS patients...
February 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28214597/classification-criteria-versus-physician-s-opinion-for-considering-a-patient-with-inflammatory-back-pain-as-suffering-from-spondyloarthritis
#5
Pierre Gazeau, Divi Cornec, Marie Agnes Timsit, Maxime Dougados, Alain Saraux
OBJECTIVE: To assess agreement among methods for classifying patients with inflammatory back pain [IBP] after a 2-year follow up. METHODS: Patients with IBP in the French nationwide, longitudinal, prospective cohort DESIR were classified after 2 years based on imaging findings, rheumatologist's confidence in a diagnosis of spondyloarthritis, three classification criteria sets [axial Assessment of Spondyloarthritis international Society (ASAS), European Spondylarthropathy Study Group (ESSG), and Amor] and treatment [TNFα antagonists]...
February 15, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28214544/can-functional-magnetic-resonance-imaging-studies-help-with-the-optimization-of-health-messaging-for-lifestyle-behavior-change-a-systematic-review
#6
REVIEW
Maxine E Whelan, Paul S Morgan, Lauren B Sherar, Mark W Orme, Dale W Esliger
Unhealthy behaviors, including smoking, poor nutrition, excessive alcohol consumption, physical inactivity and sedentary lifestyles, are global risk factors for non-communicable diseases and premature death. Functional magnetic resonance imaging (fMRI) offers a unique approach to optimize health messages by examining how the brain responds to information relating to health. Our aim was to systematically review fMRI studies that have investigated variations in brain activation in response to health messages relating to (i) smoking; (ii) alcohol consumption; (iii) physical activity; (iv) diet; and (v) sedentary behavior...
February 15, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28214496/new-diagnostic-modalities-in-the-evaluation-of-lymphedema
#7
REVIEW
Thomas F O'Donnell, John C Rasmussen, Eva M Sevick-Muraca
OBJECTIVE: Currently, lymphedema (LED) is typically diagnosed clinically on the basis of a patient's history and characteristic physical findings. Whereas the diagnosis of LED is sometimes confirmed by lymphoscintigraphy (LSG), the technique is limited in both its ability to identify disease and to guide therapy. Recent advancements provide opportunities for new imaging techniques not only to assist in the diagnosis of LED, based on anatomic changes, but also to assess contractile function and to guide therapeutic intervention...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28214478/accuracy-of-64-section-mdct-in-the-diagnosis-of-cruciate-ligament-tears
#8
E J Heffernan, D E Moran, J F Gerstenmaier, C J McCarthy, C Hegarty, C J McMahon
AIM: To evaluate the accuracy of non-arthrographic 64-section multidetector computed tomography (CT) in the assessment of cruciate ligament tears. A secondary goal was to determine its accuracy in the diagnosis of additional soft-tissue injuries around the knee. MATERIALS AND METHODS: Forty consecutive outpatients underwent same-day magnetic resonance imaging (MRI) and 64-slice multidetector CT (MDCT) of the knee in this prospective study. MDCT images were independently evaluated for integrity of the anterior (ACL) and posterior cruciate ligaments (PCL), medial and lateral menisci, and medial and lateral collateral ligaments...
February 15, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28214470/myopericytoma-in-urinary-bladder-a-case-report
#9
Takahiro Nagai, Toshio Kamimura, Kaoru Itou, Masato Fujii, Hiromasa Tsukino, Shoichiro Mukai, Yutaka Akiyama, Hiroaki Kataoka, Toshiyuki Kamoto
BACKGROUND: Myopericytoma is reported to occur mainly in the skin and superficial soft tissue of the extremities. In contrast, occurrence in the urinary bladder is extremely rare. CASE PRESENTATION: We describe a 75-year-old Japanese man who developed a submucosal tumor at the right trigone of his bladder that led to interference with the discharge of right ureteral calculus. No invasive growth was observed by magnetic resonance imaging. Transurethral resection was successfully performed; histopathological analysis revealed perivascular proliferation of spindle-shaped to oval-shaped, cytologically bland tumor cells with eosinophilic cytoplasm...
February 19, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28214465/acute-and-chronic-lateral-ankle-instability-diagnosis-management-and-new-concepts
#10
Rachel Shakked, Steven Sheskier
Lateral ankle instability is a common entity that can result in degenerative arthritis if left untreated. Acute ligament injuries should primarily be treated nonoperatively with a course of physical therapy and functional bracing. Chronic ankle instability is defined as mechanical or functional and can be diagnosed using a combination of history, physical examination, stress radiographs, and magnetic resonance imaging. After failure of nonoperative treatment, surgical treatment with anatomic ligament repair and inferior extensor retinaculum augmentation has the best clinical outcomes...
January 2017: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/28214332/comparison-of-several-white-matter-tracts-in-feline-and-canine-brain-by-using-magnetic-resonance-diffusion-tensor-imaging
#11
Olivier Jacqmot, Bert Van Thielen, Alex Michotte, Inneke Willekens, Filip Verhelle, Peter Goossens, Filip De Ridder, Jan Pieter Clarys, Anne Vanbinst, Cindy Peleman, Johan de Mey
Recently, we published a first anatomical Diffusion Tensor Imaging (DTI) atlas regarding white matter tracts in the canine brain. The purpose of this study was to show the significance of DTI in the revelation of the white matter fibres in the feline brain (i.e. to obtain an anatomical DTI atlas of images) and to descriptively compare these to previously obtained white matter fibre images of the canine brain. DTI MR Images of 4 cats euthanised for reasons other than neurological disorders were obtained with a 3 T system...
February 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28214172/does-successful-rotator-cuff-repair-improve-muscle-atrophy-and-fatty-infiltration-of-the-rotator-cuff-a-retrospective-magnetic-resonance-imaging-study-performed-shortly-after-surgery-as-a-reference
#12
Noritaka Hamano, Atsushi Yamamoto, Hitoshi Shitara, Tsuyoshi Ichinose, Daisuke Shimoyama, Tsuyoshi Sasaki, Tsutomu Kobayashi, Yohei Kakuta, Toshihisa Osawa, Kenji Takagishi
BACKGROUND: Muscle atrophy and fatty infiltration in the rotator cuff muscles are often observed in patients with chronic rotator cuff tears. The recovery from these conditions has not been clarified. METHODS: Ninety-four patients were included in this study. The improvement in muscle atrophy and fatty infiltration in successfully repaired rotator cuff tears was evaluated by magnetic resonance imaging at 1 year and 2 years after surgery and was compared with muscle atrophy and fatty infiltration observed on magnetic resonance imaging at 2 weeks after surgery to discount any changes due to the medial retraction of the torn tendon...
February 15, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28214165/agenesis-of-the-corpus-callosum-and-aicardi-syndrome-a%C3%A2-neuroimaging-and-clinical-comparison
#13
T Govil-Dalela, A Kumar, R Agarwal, H T Chugani
BACKGROUND: Agenesis of the corpus callosum can occur in individuals with epilepsy, either in isolation or as part of various neurological conditions, such as Aicardi syndrome. In this study, we evaluated the clinical and neuroradiological differences between children with nonsyndromic agenesis of the corpus callosum and those with Aicardi syndrome. METHODS: We evaluated 31 children with epilepsy and agenesis of the corpus callosum (11 males, 20 females), 14 of whom had Aicardi syndrome (all females)...
January 4, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28214153/arrhythmogenic-right-ventricular-dysplasia-atypical-clinical-presentation
#14
José Marçalo, Luiz Menezes Falcão
A 67-year-old man was admitted to our hospital after episodes of syncope preceded by malaise and diffuse neck and chest discomfort. No family history of cardiac disease was reported. Laboratory workup was within normal limits, including D-dimers, serum troponin I and arterial blood gases. The electrocardiogram showed sinus rhythm with T-wave inversion in leads V1 to V3. Computed tomography angiography to investigate pulmonary embolism showed no abnormal findings. Transthoracic echocardiography (TTE) displayed massive enlargement of the right ventricle with intact interatrial septum and no pulmonary hypertension...
February 14, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28214127/functionalized-superparamagnetic-iron-oxide-nanoparticles-provide-highly-efficient-iron-labeling-in-macrophages-for-magnetic-resonance-based-detection-in-vivo
#15
Jack Sharkey, Philip J Starkey Lewis, Michael Barrow, Salamah M Alwahsh, June Noble, Eilidh Livingstone, Ross J Lennen, Maurits A Jansen, Jaime Garcia Carrion, Neill Liptrott, Shareen Forbes, Dave J Adams, Amy E Chadwick, Stuart J Forbes, Patricia Murray, Matthew J Rosseinsky, Christopher E Goldring, B Kevin Park
BACKGROUND AIMS: Tracking cells during regenerative cytotherapy is crucial for monitoring their safety and efficacy. Macrophages are an emerging cell-based regenerative therapy for liver disease and can be readily labeled for medical imaging. A reliable, clinically applicable cell-tracking agent would be a powerful tool to study cell biodistribution. METHODS: Using a recently described chemical design, we set out to functionalize, optimize and characterize a new set of superparamagnetic iron oxide nanoparticles (SPIONs) to efficiently label macrophages for magnetic resonance imaging-based cell tracking in vivo...
February 15, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28213908/a-randomized-controlled-trial-of-lacosamide-versus-sodium-valproate-in-status-epilepticus
#16
Usha K Misra, Deepanshu Dubey, Jayantee Kalita
OBJECTIVE: To compare the efficacy and safety of lacosamide (LCM) and sodium valproate (SVA) in lorazepam (LOR)-resistant status epilepticus (SE). METHODS: Patients with LOR-resistant SE were randomized to intravenous LCM 400 mg at a rate of 60 mg/kg/min or SVA 30 mg/kg at a rate of 100 mg/min. The SE severity score (STESS), duration of SE and its etiology, and magnetic resonance imaging (MRI) findings were noted. Primary outcome was seizure cessation for 1 h, and secondary outcomes were 24 h seizure remission, in hospital death and severe adverse events (SAEs)...
February 18, 2017: Epilepsia
https://www.readbyqxmd.com/read/28213852/-imaging-of-the-lumbosacral-plexus-diagnostics-and-treatment-planning-with-high-resolution-procedures
#17
S Jengojan, C Schellen, G Bodner, G Kasprian
BACKGROUND: Technical advances in magnetic resonance (MR) and ultrasound-based neurography nowadays facilitate the radiological assessment of the lumbosacral plexus. OBJECTIVE: Anatomy and imaging of the lumbosacral plexus and diagnostics of the most common pathologies. MATERIAL AND METHODS: Description of the clinically feasible combination of magnetic resonance imaging (MRI) and ultrasound diagnostics, case-based illustration of imaging techniques and individual advantages of MRI and ultrasound-based diagnostics for various pathologies of the lumbosacral plexus and its peripheral nerves...
February 17, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28213833/molecular-imaging-in-synthetic-biology-and-synthetic-biology-in-molecular-imaging
#18
REVIEW
Assaf A Gilad, Mikhail G Shapiro
Biomedical synthetic biology is an emerging field in which cells are engineered at the genetic level to carry out novel functions with relevance to biomedical and industrial applications. This approach promises new treatments, imaging tools, and diagnostics for diseases ranging from gastrointestinal inflammatory syndromes to cancer, diabetes, and neurodegeneration. As these cellular technologies undergo pre-clinical and clinical development, it is becoming essential to monitor their location and function in vivo, necessitating appropriate molecular imaging strategies, and therefore, we have created an interest group within the World Molecular Imaging Society focusing on synthetic biology and reporter gene technologies...
February 17, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28213703/proximal-tibial-bony-and-meniscal-slopes-are-higher-in-acl-injured-subjects-than-controls-a-comparative-mri-study
#19
Ashraf Elmansori, Timothy Lording, Raphaël Dumas, Khalifa Elmajri, Philippe Neyret, Sébastien Lustig
PURPOSE: Increased tibial slope is reported as a risk factor of non-contact anterior cruciate ligament (ACL) injury, but the effect of the soft tissues on slope remains unclear. The primary aims of this study were to compare the tibial bony and soft tissue slopes between patients with and without ACL injury, and to investigate the relationship between the meniscal slopes (MS) and the tibial bony slope. Our hypothesis was that the menisci would correct the inclination of the bony tibial slope towards the horizontal...
February 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28213448/detection-and-monitoring-of-acute-myocarditis-applying-quantitative-cardiovascular-magnetic-resonance
#20
Florian von Knobelsdorff-Brenkenhoff, Johannes Schüler, Serkan Dogangüzel, Matthias A Dieringer, Andre Rudolph, Andreas Greiser, Peter Kellman, Jeanette Schulz-Menger
BACKGROUND: Cardiovascular magnetic resonance based on the Lake Louise Criteria is used to make the diagnosis of acute myocarditis. Novel quantitative parametric mapping techniques promise to overcome some of its limitations. We aimed to evaluate quantitative cardiovascular magnetic resonance to detect and monitor acute myocarditis. METHODS AND RESULTS: Eighteen patients with clinical diagnosis of acute myocarditis (25 years [23-38 years]; 78% males) were prospectively enrolled and repeatedly underwent cardiovascular magnetic resonance at 1...
February 2017: Circulation. Cardiovascular Imaging
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