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https://www.readbyqxmd.com/read/27922231/evaluation-of-central-nervous-system-in-patients-with-glycogen-storage-disease-type-1a
#1
Yusuf Aydemir, Figen Gürakan, İnci Nur Saltık Temizel, Hülya Demir, Kader Karlı Oğuz, Dilek Yalnızoğlu, Meral Topçu, Hasan Özen, Aysel Yüce
We aimed to evaluate structure and functions of central nervous system (CNS) in children with glycogen storage disease (GSD) type 1a. Neurological examination, psychometric tests, electroencephalography (EEG), magnetic resonance imaging (MRI), visual evoked potentials (VEP) and brainstem auditory evoked potentials (BAEP) were performed. The results were compared between patients with good and poor metabolic control and healthy children. Twenty-three patients with GSD type 1a were studied. Twelve patients were in poor metabolic control group and 11 patients in good metabolic control group...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27922124/convex-analysis-of-mixtures-for-separating-non-negative-well-grounded-sources
#2
Yitan Zhu, Niya Wang, David J Miller, Yue Wang
Blind Source Separation (BSS) is a powerful tool for analyzing composite data patterns in many areas, such as computational biology. We introduce a novel BSS method, Convex Analysis of Mixtures (CAM), for separating non-negative well-grounded sources, which learns the mixing matrix by identifying the lateral edges of the convex data scatter plot. We propose and prove a sufficient and necessary condition for identifying the mixing matrix through edge detection in the noise-free case, which enables CAM to identify the mixing matrix not only in the exact-determined and over-determined scenarios, but also in the under-determined scenario...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922106/in-situ-one-step-synthesis-of-carbon-encapsulated-naked-magnetic-metal-nanoparticles-conducted-without-additional-reductants-and-agents
#3
Jun Kang, Yeonwon Kim, Hye-Min Kim, Xiulan Hu, Nagahiro Saito, Jae-Hyuk Choi, Myeong-Hoon Lee
C-encapsulated highly pure Ni, Co, and Fe magnetic nanoparticles (MNPs/C) were synthesized by an innovative one-step in-situ plasma in liquid method (solution plasma processing, SPP) without any additional reductants, agents, or treatment. Successful encapsulation of MNPs was demonstrated by using inductively coupled plasma-atomic emission spectrometry and cyclic voltammetry techniques. The obtained X-ray diffraction patterns and transmission electron microscopy images corresponded to MNPs with average diameters of 5 nm and good crystalline structure...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921340/brain-activation-during-fear-extinction-predicts-exposure-success
#4
Tali Manber Ball, Sarah E Knapp, Martin P Paulus, Murray B Stein
BACKGROUND: Exposure therapy, a gold-standard treatment for anxiety disorders, is assumed to work via extinction learning, but this has never been tested. Anxious individuals demonstrate extinction learning deficits, likely related to less ventromedial prefrontal cortex (vmPFC) and more amygdala activation, but the relationship between these deficits and exposure outcome is unknown. We tested whether anxious individuals who demonstrate better extinction learning report greater anxiety reduction following brief exposure...
December 6, 2016: Depression and Anxiety
https://www.readbyqxmd.com/read/27921204/a-case-of-double-depressor-palsy-followed-by-pursuit-deficit-due-to-sequential-infarction-in-bilateral-thalamus-and-right-medial-superior-temporal-area
#5
Su Jin Kim, Myeong In Yeom, Seung Uk Lee
BACKGROUND: We present a unique case of a patient who suffered two rare events affecting the supranuclear control, first of the vertical and second of the horizontal eye movements. The first event involved bilateral thalamic infarcts that resulted in double depressor palsy. The second event occurred 1 year later and it involved supranuclear control of horizontal eye movements creating pursuit deficit. CASE PRESENTATION: A 47-year-old male presented with complaints of diplopia upon awakening...
December 5, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27921171/computed-tomography-and-magnetic-resonance-fusion-imaging-in-cholesteatoma-preoperative-assessment
#6
Agustín Campos, Federico Mata, Rosa Reboll, María Luisa Peris, Jorge Basterra
The purpose of this study is to describe a method for developing fusion imaging for the preoperative evaluation of cholesteatoma. In 33 patients diagnosed with cholesteatoma, a high-resolution temporal bone computed tomography (CT) scan without intravenous contrast and propeller diffusion-weighted magnetic resonance imaging (MRI) were performed. Both studies were then sent to the BrainLAB work station, where the images were fused to obtain a morphological and color map. Intraoperative findings coincided with fusion CT-MRI imaging in all but two patients...
December 5, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27921160/european-society-of-urogenital-radiology-esur-guidelines-mr-imaging-of-pelvic-endometriosis
#7
M Bazot, N Bharwani, C Huchon, K Kinkel, T M Cunha, A Guerra, L Manganaro, L Buñesch, A Kido, K Togashi, I Thomassin-Naggara, A G Rockall
: Endometriosis is a common gynaecological condition of unknown aetiology that primarily affects women of reproductive age. The accepted first-line imaging modality is pelvic ultrasound. However, magnetic resonance imaging (MRI) is increasingly performed as an additional investigation in complex cases and for surgical planning. There is currently no international consensus regarding patient preparation, MRI protocols or reporting criteria. Our aim was to develop clinical guidelines for MRI evaluation of pelvic endometriosis based on literature evidence and consensus expert opinion...
December 5, 2016: European Radiology
https://www.readbyqxmd.com/read/27921159/differentiation-of-uterine-leiomyosarcoma-from-atypical-leiomyoma-diagnostic-accuracy-of-qualitative-mr-imaging-features-and-feasibility-of-texture-analysis
#8
Yulia Lakhman, Harini Veeraraghavan, Joshua Chaim, Diana Feier, Debra A Goldman, Chaya S Moskowitz, Stephanie Nougaret, Ramon E Sosa, Hebert Alberto Vargas, Robert A Soslow, Nadeem R Abu-Rustum, Hedvig Hricak, Evis Sala
PURPOSE: To investigate whether qualitative magnetic resonance (MR) features can distinguish leiomyosarcoma (LMS) from atypical leiomyoma (ALM) and assess the feasibility of texture analysis (TA). METHODS: This retrospective study included 41 women (ALM = 22, LMS = 19) imaged with MRI prior to surgery. Two readers (R1, R2) evaluated each lesion for qualitative MR features. Associations between MR features and LMS were evaluated with Fisher's exact test. Accuracy measures were calculated for the four most significant features...
December 5, 2016: European Radiology
https://www.readbyqxmd.com/read/27921157/assessment-of-pisotriquetral-misalignment-with-magnetic-resonance-imaging-is-it-associated-with-trauma
#9
Hee-Dong Chae, Hye Jin Yoo, Sung Hwan Hong, Ja-Young Choi, Heung Sik Kang
OBJECTIVE: Our objective was to determine whether there is an association between pisotriquetral (PT) malalignment and acute distal radius fracture by using magnetic resonance imaging (MRI). METHODS: We evaluated 138 patients who underwent 3-T MRI of the wrists. Group A comprised 85 patients with acute distal radius fracture, and group B comprised 53 patients without trauma. PT interval and angle and pisiform excursion were measured on oblique axial and sagittal multiplanar reformats...
December 5, 2016: European Radiology
https://www.readbyqxmd.com/read/27921114/-postoperative-imaging-of-the-internal-auditory-canal-visualization-of-active-auditory-implants-german-version
#10
I Todt, G Rademacher, P Mittmann, S Mutze, A Ernst
BACKGROUND: Assessment of the internal auditory canal (IAC) and the cochlea is of central importance in neurotology. The artefacts and visibility of the different types of active auditory implants in MRI vary, due to their specific ferromagnetic components. Knowledge of the size of MRI artefacts and the options for handling these is important for the auditory rehabilitation of specific diseases (e. g., vestibular schwannoma). METHODS: The current paper is a literature review RESULTS: MRI assessment of the IAC and cochlea after surgical placement of an active auditory implant is feasible only with a percutaneous bone-anchored hearing aid (BAHA, Ponto)...
December 5, 2016: HNO
https://www.readbyqxmd.com/read/27921053/metastatic-esophageal-cancer-presenting-as-an-orbital-mass
#11
Sunil Pokharel, Ghassan Kabbach, Seth J Richter, Laura Chiu
We report a case of adenocarcinoma of the esophagus presenting as an orbital metastasis prior to the primary diagnosis. A 66-year-old white male presented to his ophthalmologist with right orbital swelling for several months. Magnetic resonance imaging revealed a supraorbital infiltrative mass. Pathology from the mass revealed findings consistent with adenocarcinoma of gastrointestinal origin. Upper endoscopy revealed distal esophageal stricture and irregularities. Pathology from the esophagus showed the same malignancy found in the orbit...
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27920976/resting-state-theta-band-connectivity-and-graph-analysis-in-generalized-social-anxiety-disorder
#12
Mengqi Xing, Reza Tadayonnejad, Annmarie MacNamara, Olusola Ajilore, Julia DiGangi, K Luan Phan, Alex Leow, Heide Klumpp
BACKGROUND: Functional magnetic resonance imaging (fMRI) resting-state studies show generalized social anxiety disorder (gSAD) is associated with disturbances in networks involved in emotion regulation, emotion processing, and perceptual functions, suggesting a network framework is integral to elucidating the pathophysiology of gSAD. However, fMRI does not measure the fast dynamic interconnections of functional networks. Therefore, we examined whole-brain functional connectomics with electroencephalogram (EEG) during resting-state...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27920936/steroid-resistant-tolosa-hunt-syndrome-with-a-de-novo-intracavernous-aneurysm-a-case-report
#13
Hiroshi Takasuna, Rie Sasaki, Makoto Shiraishi, Masatomo Doi, Daisuke Wakui, Hidemichi Ito, Kotaro Oshio, Yuichiro Tanaka
BACKGROUND: We report a case of steroid-resistant Tolosa-Hunt syndrome (THS) with recurrent bilateral painful ophthalmoplegia, accompanied with sphenoid sinusitis, pituitary abscess, and an aneurysm arising from the cavernous portion of the internal carotid artery. CASE DESCRIPTION: A 53-year-old woman suffered severe left painful ophthalmoplegia. A magnetic resonance image (MRI) revealed thickness of the left cavernous sinus (CS). Steroid was administrated under the diagnosis of THS, and the symptom transiently diminished...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27920897/impact-of-biopolymer-matrices-on-relaxometric-properties-of-contrast-agents
#14
Alfonso Maria Ponsiglione, Maria Russo, Paolo Antonio Netti, Enza Torino
Properties of water molecules at the interface between contrast agents (CAs) for magnetic resonance imaging and macromolecules could have a valuable impact on the effectiveness of metal chelates. Recent studies, indeed, demonstrated that polymer architectures could influence CAs' relaxivity by modifying the correlation times of the metal chelate. However, an understanding of the physico-chemical properties of polymer/CA systems is necessary to improve the efficiency of clinically used CAs, still exhibiting low relaxivity...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920873/migratory-stroke-like-lesions-in-a-case-of-adult-onset-mitochondrial-encephalomyopathy-lactic-acidosis-and-stroke-like-episodes-melas-syndrome-and-a-review-of-imaging-findings
#15
Stephen S Cai, Rainer von Coelln, Theresa J Kouo
Imaging findings of adult-onset mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome is poorly documented. The authors present a 48-year-old woman with subacute onset of word-finding difficulties and right arm stiffness. Magnetic resonance imaging performed 2 weeks prior revealed left temporal lobe diffusion and fluid-attenuated inversion recovery hyperintensity predominantly involving the cortex. The apparent diffusion coefficient map showed preserved signal in the temporal cortex...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920869/imaging-findings-of-arthroereisis-in-planovalgus-feet
#16
Mika T Nevalainen, Johannes B Roedl, Adam C Zoga, William B Morrison
Arthroereisis is a rare and disputed procedure, where an implant screw is inserted into the sinus tarsi to treat flatfoot deformity. Weight-bearing radiographs are the most essential examinations to assess the correct localization and related measurements. Hardware loosening is the most common complication seen as localized lucency and as dislocation of the implant. Computed tomography yields superior resolution with reconstruction capabilities. On magnetic resonance imaging, the implant appears as a dark signal focus on T1 and T2-weighted images with a hyperintense T2-signal rim...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920866/tophaceous-gout-with-rare-involvement-of-the-patella
#17
Spencer Clark, James Markham Evans, Nicholas Armstrong, William Schnitz
Gout arthritis is an inflammatory arthritis caused by hyperuricemia from various etiologies. It is typically a polyarticular arthritis with the most common joint involved being the first metatarsophalangeal joint. We present a case of gout of the knee with characteristic magnetic resonance imaging findings and rare involvement of the patella. Radiographic findings of gout are diagnostic; however, they manifest many years after the onset of the disease process. Control of symptoms and progression of the disease is possible with correct treatment made possible by early diagnosis...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920855/aggressive-angiomyxoma-case-report-and-review-of-the-literature
#18
John C Benson, Scott Gilles, Tina Sanghvi, James Boyum, Eric Niendorf
A 47-year-old female presented to clinic with a 5-year history of a left buttock mass. The patient's hemoglobin was low (9.7 g/dL); laboratory analysis was otherwise unremarkable. Ultrasound of the left gluteal region demonstrated a heterogeneous vascular solid lesion. Magnetic resonance and computed tomography imaging showed an enhancing mass extending from the left ischioanal fossa through the levator ani muscle into the pelvis. Biopsy revealed bland-appearing spindle-shaped cells positive for estrogen and progesterone receptors, consistent with an aggressive angiomyxoma...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920853/magnetic-resonance-imaging-of-adenoma-malignum-of-the-uterine-cervix-with-pathologic-correlation-a-case-report
#19
Alba Castán Senar, Blanca Paño, Adela Saco, Carlos Nicolau
Adenoma malignum (AM) is considered a rare subtype of cervical adenocarcinoma. Although previous reports have described magnetic resonance findings, none of these reports evaluated the utility of diffusion-weighted imaging in the differential diagnosis of AM and other multicystic cervical lesions. We present a case report of an AM that did not show restriction on the apparent diffusion coefficient map, which can be explained by the low cellularity of the tumor. This is consistent with the proper correlation between the diffusion imaging and histopathology of the tumor...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920851/zinner-syndrome-a-rare-developmental-anomaly-of-the-mesonephric-duct-diagnosed-on-magnetic-resonance-imaging
#20
Shibani Mehra, Rajeev Ranjan, Umesh Chandra Garga
Developmental anomalies of the urogenital tract are rare but often encountered. Zinner's syndrome is a rare congenital abnormality of mesonephric (Wolffian) duct consisting of unilateral renal agenesis, ipsilateral seminal vesicle cyst, and ipsilateral ejaculatory duct obstruction due to developmental arrest in early embryogenesis affecting the caudal end of Mullerian duct and only approximately a 100 cases have been reported so far. Radiologic modalities such as intravenous pyelography, ultrasonography, vasovesiculography, contrast enhanced computed tomography, and magnetic resonance imaging are all helpful in diagnosis of this unusual entity...
December 2016: Radiology case reports
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