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https://www.readbyqxmd.com/read/28110433/a-comprehensive-analysis-of-cardiac-valve-plane-displacement-in-healthy-adults-age-stratified-normal-values-by-cardiac-magnetic-resonance
#1
Marco M Ochs, Thomas Fritz, Florian André, Johannes Riffel, Derliz Mereles, Matthias Müller-Hennessen, Evangelos Giannitsis, Hugo A Katus, Matthias G Friedrich, Sebastian J Buss
Cardiac valve plane displacement (CVPD) reflects longitudinal LV function. The purpose of the present study was to determine regional heterogeneity of CVPD in healthy adults to provide normal values by cardiac magnetic resonance (CMR). We measured the anterior aortic plane systolic excursion (AAPSE); the anterior, anterolateral, inferolateral, inferior, and inferoseptal mitral annular plane systolic excursion (MAPSE); and the lateral tricuspid annulus plane systolic excursion (TAPSE). Systolic excursion was measured as the distance from peak end-diastolic to peak end-sysstolic annular position (peak-to-peak) in cine images acquired in 2-, 3- and 4-chamber views...
January 21, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28110369/neuroradiology-of-human-prion-diseases-diagnosis-and-differential-diagnosis
#2
REVIEW
Simona Gaudino, Emma Gangemi, Raffaella Colantonio, Annibale Botto, Emanuela Ruberto, Rosalinda Calandrelli, Matia Martucci, Maria Gabriella Vita, Carlo Masullo, Alfonso Cerase, Cesare Colosimo
Human transmissible spongiform encephalopathies (TSEs), or prion diseases, are invariably fatal conditions associated with a range of clinical presentations. TSEs are classified as sporadic [e.g. sporadic Creutzfeldt-Jakob disease (sCJD), which is the most frequent form], genetic (e.g. Gerstmann-Straussler-Scheinker disease, fatal familial insomnia, and inherited CJD), and acquired or infectious (e.g. Kuru, iatrogenic CJD, and variant CJD). In the past, brain imaging played a supporting role in the diagnosis of TSEs, whereas nowadays magnetic resonance imaging (MRI) plays such a prominent role that MRI findings have been included in the diagnostic criteria for sCJD...
January 21, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28110367/accurate-simultaneous-quantification-of-liver-steatosis-and-iron-overload-in-diffuse-liver-diseases-with-mri
#3
Manuela França, Ángel Alberich-Bayarri, Luis Martí-Bonmatí, Pedro Oliveira, Francisca Emanuel Costa, Graça Porto, José Ramón Vizcaíno, Javier Sanchez Gonzalez, Eduardo Ribeiro, João Oliveira, Helena Pessegueiro Miranda
PURPOSE: To evaluate the diagnostic performances of 3 Tesla multi-echo chemical shift-encoded gradient echo magnetic resonance (MECSE-MR) imaging to simultaneously quantify liver steatosis and iron overload in a wide spectrum of diffuse liver diseases having biopsy as reference standard. METHODS: MECSE-MR-acquired images were used to calculate fat fraction and iron content in a single breath-hold in 109 adult patients. Proton density fat fraction (PDFF) was prospectively estimated using complex-based data reconstruction with multipeak fat modeling...
January 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28110361/the-impact-of-routine-whole-spine-mri-screening-in-the-evaluation-of-spinal-degenerative-diseases
#4
Rishi Mugesh Kanna, Younis Kamal, Anupama Mahesh, Prakash Venugopal, Ajoy Prasad Shetty, S Rajasekaran
PURPOSE: Magnetic resonance imaging (MRI) of the spine is a sensitive investigation, which not only provides detailed images of the spinal column but also adjacent spinal regions and para-vertebral organ systems. Such incidental findings (IF) can be asymptomatic but significant. The efficacy of whole spine T2 sagittal screening in providing additional information has been demonstrated in several spinal diseases but its routine use in patients with spinal degenerative diseases has not been studied...
January 21, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28110313/framework-for-2d-3d-image-fusion-of-infrared-thermography-with-preoperative-mri
#5
Nico Hoffmann, Florian Weidner, Peter Urban, Tobias Meyer, Christian Schnabel, Yordan Radev, Gabriele Schackert, Uwe Petersohn, Edmund Koch, Stefan Gumhold, Gerald Steiner, Matthias Kirsch
Multimodal medical image fusion combines information of one or more images in order to improve the diagnostic value. While previous applications mainly focus on merging images from computed tomography, magnetic resonance imaging (MRI), ultrasonic and single-photon emission computed tomography, we propose a novel approach for the registration and fusion of preoperative 3D MRI with intraoperative 2D infrared thermography. Image-guided neurosurgeries are based on neuronavigation systems, which further allow us track the position and orientation of arbitrary cameras...
January 23, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28110259/ipsilateral-plaques-display-higher-t1-signals-than-contralateral-plaques-in-recently-symptomatic-patients-with-bilateral-carotid-intraplaque-hemorrhage
#6
Xianling Wang, Jie Sun, Xihai Zhao, Daniel S Hippe, Thomas S Hatsukami, Jin Liu, Rui Li, Gador Canton, Yan Song, Chun Yuan
BACKGROUND AND AIMS: Prospective studies have shown a strong association between carotid intraplaque hemorrhage (IPH), detected by magnetic resonance imaging (MRI), and cerebrovascular ischemic events. However, IPH is also observed in a substantial number of asymptomatic patients. We hypothesized that there are differences in the characteristics of IPH+ plaques associated with recent symptoms, compared to IPH+ plaques not associated with recent symptoms. METHODS: Patients with recent (≤2 weeks) anterior circulation ischemic events were scanned using a standardized multisequence protocol...
January 12, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28110235/relationship-between-expression-of-vascular-endothelial-growth-factor-and-the-proliferation-of-prolactinomas
#7
Nan Li Ya, ZhiQuan Jiang
OBJECTIVE: Prolactinomas are the most common functional hormone-producing pituitary lesions, accounting for 30-40% of all pituitary tumors, while in autopsy series their incidence reaches 50%. However, patients with prolactinoma had a higher recurrence percentage and rate than patients with acromegaly or Cushing's disease. Furthermore, prolactinomas have the highest rate of recurrence post-surgery as compared with other pituitary adenomas. At present, this behavior of prolactinoma is largely unexplained, but may be related to definition of cure, or to more frequent microscopic tumor infiltration into normal pituitary tissue, which is not removed at surgery...
December 14, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28110089/causal-evidence-of-the-involvement-of-the-right-occipital-face-area-in-face-identity-acquisition
#8
Géza Gergely Ambrus, Fabienne Windel, A Mike Burton, Gyula Kovács
There is growing evidence that the occipital face area (OFA), originally thought to be involved in the construction of a low-level representation of the physical features of a face, is also taking part in higher-level face processing. To test whether the OFA is causally involved in the learning of novel face identities, we have used transcranial magnetic stimulation (TMS) together with a sequential sorting - face matching paradigm (Andrews et al. 2015). First, participants sorted images of two unknown persons during the initial learning phase while either their right OFA or the Vertex was stimulated using TMS...
January 18, 2017: NeuroImage
https://www.readbyqxmd.com/read/28109932/accuracy-of-noncontrast-quiescent-interval-single-shot-lower-extremity-mr-angiography-versus-ct%C3%A2-angiography-for-diagnosis-of-peripheral-artery-disease-comparison-with-digital-subtraction-angiography
#9
Akos Varga-Szemes, Julian L Wichmann, U Joseph Schoepf, Pal Suranyi, Carlo N De Cecco, Giuseppe Muscogiuri, Damiano Caruso, Ricardo T Yamada, Sheldon E Litwin, Christian Tesche, Taylor M Duguay, Shivraman Giri, Rozemarijn Vliegenthart, Thomas M Todoran
OBJECTIVES: This study sought to evaluate the image quality and diagnostic accuracy of noncontrast quiescent-interval single-shot (QISS) magnetic resonance angiography (MRA) versus iodine-contrast computed tomography angiography (CTA) in patients with peripheral artery disease (PAD), with invasive digital subtraction angiography (DSA) as the reference standard. BACKGROUND: QISS is a recently introduced noncontrast MRA technique. Although the diagnostic accuracy of QISS is reportedly similar to that of contrast-enhanced MRA, its performance compared with contrast-enhanced CTA, the most frequently used noninvasive modality for evaluation of PAD, is unknown...
January 12, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28109921/coronary-artery-pet-mr-imaging-feasibility-limitations-and-solutions
#10
Philip M Robson, Marc R Dweck, Maria Giovanna Trivieri, Ronan Abgral, Nicolas A Karakatsanis, Johanna Contreras, Umesh Gidwani, Jagat P Narula, Valentin Fuster, Jason C Kovacic, Zahi A Fayad
OBJECTIVES: The aims of this study were to describe the authors' initial experience with combined coronary artery positron emission tomographic (PET) and magnetic resonance (MR) imaging using (18)F-fluorodeoxyglucose ((18)F-FDG) and (18)F-sodium fluoride ((18)F-NaF) radiotracers, describe common problems and their solutions, and demonstrate the feasibility of coronary PET/MR imaging in appropriate patients. BACKGROUND: Recently, PET imaging has been applied to the aortic valve and regions of atherosclerosis...
January 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28109888/improving-structural-brain-images-acquired-with-the-3d-flash-sequence
#11
Jinghua Wang, Lili He, Hairong Zheng, Zhong-Lin Lu
The three-dimension Fast Low Angle SHot Magnetic Resonance Imaging (3D FLASH) sequence has been widely adopted in medical diagnostic imaging because of its availability, simplicity, and high spatial resolution. To improve the quality of structural brain images acquired with the 3D FLASH sequence, we developed a parameter optimization scheme and image inhomogeneity correction methods. The optimal imaging parameters were determined by maximizing gray-matter and white-matter CNR efficiency. Compared to protocols based on published parameters, applying the proposed optimal imaging parameters increased CNR efficiency by >10%...
January 18, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28109858/radiological-dilemma-in-an-extra-axial-petroclival-lesion-low-vs-high-grade
#12
Madhivanan Karthigeyan, Chirag Kamal Ahuja, Debjyoti Chatterjee, Pravin Salunke
BACKGROUND: Radiological differentiation between a low and high grade lesion is crucial on deciding the extent of resection and prognostication. Occasionally the imaging features can be confusing between the two. We report such a case which was a radiological dilemma. The lesion appeared apparently benign and extra-axial on routine magnetic resonance (MR) sequences. However, there were subtle clinical and imaging clues towards high grade lesion. CASE DESCRIPTION: A 27-year-old lady presented with multiple cranial nerve palsies, gait ataxia and features of raised intracranial pressure...
January 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28109624/metatarsalgia
#13
REVIEW
J-L Besse
The causes of metatarsalgia are classified as primary, secondary, and iatrogenic. Anatomical and biomechanical considerations separate "static" from "propulsive" forms of metatarsalgia. The physical examination should be combined with an assessment of weight-bearing radiographs and, if needed, of ultrasound or magnetic resonance imaging scans. The first-line treatment is conservative (stretching exercises, footwear modification, insoles, and lesion debridement). Soft-tissue surgical procedures (gastrocnemius muscle recession, tendon transfer, and plantar plate repair) should also be considered...
January 18, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28109612/topographic-mapping-of-left-ventricular-regional-contractile-injury-in-ischemic-mitral-regurgitation
#14
Timothy S Lancaster, Julia Kar, Brian P Cupps, Matthew C Henn, Kevin Kulshrestha, Danielle J Koerner, Michael K Pasque
OBJECTIVE: Restrictive leaflet tethering resulting from regional left ventricular (LV) contractile injury causes ischemic mitral regurgitation (MR). We hypothesized that 3-dimensional LV topographic mapping by MRI-based multiparametric strain analysis could characterize the regional contractile injury patterns that differentiate ischemic coronary artery disease patients who have ischemic MR from those who do not. METHODS: Magnetic resonance imaging-based multiparametric strain data were calculated for 15,300 LV grid points in 100 normal volunteers...
December 19, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28109537/clinical-factors-associated-with-cerebral-metabolism-in-term-neonates-with-congenital-heart-disease
#15
Anna Lonyai Harbison, Jodie K Votava-Smith, Sylvia Del Castillo, S Ram Kumar, Vince Lee, Vincent Schmithorst, Hollie A Lai, Sharon O'Neil, Stefan Bluml, Lisa Paquette, Ashok Panigrahy
OBJECTIVE: To determine associations between patient and clinical factors with postnatal brain metabolism in term neonates with congenital heart disease (CHD) via the use of quantitative magnetic resonance spectroscopy. STUDY DESIGN: Neonates with CHD were enrolled prospectively to undergo pre- and postoperative 3T brain magnetic resonance imaging. Short-echo single-voxel magnetic resonance spectroscopy of parietal white matter was used to quantify metabolites related to brain maturation (n-acetyl aspartate, choline, myo- inositol), neurotransmitters (glutamate and gamma-aminobutyric acid), energy metabolism (glutamine, citrate, glucose, and phosphocreatine), and injury/apoptosis (lactate and lipids)...
January 19, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28109524/torsades-de-pointes-with-high-dose-loperamide
#16
Patrick M Kozak, Amanda K Harris, John A McPherson, Dan M Roden
CASE: A 41year-old male presented with torsades de pointes. The patient was taking over 100mg of loperamide per day to self-medicate for chronic pain. Coronary angiography, cardiac magnetic resonance imaging, and genetic testing were negative for pre-disposing ischemia, cardiomyopathy, or genetic variant respectively. CONCLUSIONS: Patients without predisposing genetic or cardiac abnormalities are at risk of life-threatening QTc prolongation and torsades with use of high-dose loperamide...
January 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28109477/clinical-outcomes-following-cochlear-implantation-in-children-with-inner-ear-anomalies
#17
Amal Isaiah, Daniel Lee, Felicity Lenes-Voit, Melissa Sweeney, Walter Kutz, Brandon Isaacson, Peter Roland, Kenneth H Lee
OBJECTIVE: A significant proportion of children with congenital hearing loss who are candidates for cochlear implants (CIs) may have inner ear malformations (IEMs). Surgical and speech outcomes following CI in these children have not been widely reported. METHODS: The charts of children who were evaluated for a CI between 1/1/1986 and 12/31/2014 at a university-based tertiary level pediatric cochlear implant center were reviewed. Principal inclusion criteria included (i) age 1-18 years, (ii) history of bilateral severe to profound sensorineural hearing loss, and (iii) limited benefit from binaural amplification...
February 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28109316/adenosine-induced-ventricular-fibrillation-in-a-structurally-normal-heart-a-case-report
#18
Christopher A Rajkumar, Norman Qureshi, Fu Siong Ng, Vasileios F Panoulas, Phang Boon Lim
BACKGROUND: Adenosine is the first-line pharmacotherapy for termination of supraventricular tachycardia through its action on the atrioventricular node. However, pro-arrhythmic effects of adenosine are also recognised, most notably in the presence of pre-excited atrial fibrillation. In this case report, we describe the induction of ventricular fibrillation in a patient with no demonstrable accessory pathway, nor any other structural heart disease. This rare, idiosyncratic reaction has never previously been reported and is of relevance given the widespread and routine use of adenosine in clinical practice...
January 22, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28109309/role-of-magnetic-resonance-imaging-versus-ultrasound-for-detection-of-plantar-plate-tear
#19
REVIEW
Xin Duan, Lang Li, Dai-Qing Wei, Ming Liu, Xi Yu, Zhao Xu, Ye Long, Zhou Xiang
BACKGROUND: Plantar plate tears could be the reason of forefoot pain, affecting foot function. Magnetic resonance imaging (MRI) and ultrasound (US) were commonly used for the diagnosis of plantar plate tears. The decision of whether to use MRI or US carried some controversy. Our study aimed to find out the diagnostic accuracy of MRI versus US for plantar plate tears. METHODS: The database of the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, EMBASE, and relative orthopedic meetings until May 2016 were searched...
January 21, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28109298/neuroregenerative-potential-of-intravenous-g-csf-and-autologous-peripheral-blood-stem-cells-in-children-with-cerebral-palsy-a-randomized-double-blind-cross-over-study
#20
Wee-Jin Rah, Young-Ho Lee, Jin-Hwa Moon, Hyun-Ju Jun, Hye-Ryeong Kang, Hani Koh, Hye Jung Eom, Ji Young Lee, Young Jun Lee, Ji Young Kim, Yun-Young Choi, Kyeongil Park, Mi Jung Kim, Seung-Hyun Kim
OBJECTIVE: We performed a randomized, double-blind, cross-over study to assess the neuroregenerative potential of intravenous granulocyte colony-stimulating factor (G-CSF) followed by infusion of mobilized peripheral blood mononuclear cells (mPBMCs) in children with cerebral palsy (CP). METHODS: Children with non-severe CP were enrolled in this study. G-CSF was administered for 5 days, then mPBMCs were collected by apheresis and cryopreserved. One month later (M1), recipients were randomized to receive either mPBMCs or a placebo infusion, and these treatment groups were switched at 7 months (M7) and observed for another 6 months (M13)...
January 21, 2017: Journal of Translational Medicine
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