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https://www.readbyqxmd.com/read/28922876/visual-deficit-from-laser-interstitial-thermal-therapy-for-temporal-lobe-epilepsy-anatomical-considerations
#1
Walter J Jermakowicz, Michael E Ivan, Iahn Cajigas, Ramses Ribot, Ignacio Jusue-Torres, Mehul B Desai, Armando Ruiz, Pierre-Francois D'Haese, Andres M Kanner, Jonathan R Jagid
BACKGROUND: Laser interstitial thermal therapy (LITT) is quickly emerging as an effective surgical therapy for temporal lobe epilepsy (TLE). One of the most frequent complications of the procedure is postoperative visual field cuts, but the physiopathology of these deficits is unknown. OBJECTIVE: To evaluate potential causes of visual deficits after LITT for TLE in an attempt to minimize this complication. METHODS: This retrospective chart review compares the case of a 24-year-old male who developed homonymous hemianopsia following LITT for TLE to 17 prior patients who underwent the procedure and suffered no visual deficit...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922736/reduced-white-matter-integrity-in-borderline-personality-disorder-a-diffusion-tensor-imaging-study
#2
Taiga Ninomiya, Harumi Oshita, Yoshihisa Kawano, Chiharu Goto, Mai Matsuhashi, Koji Masuda, Fuku Takita, Toshihiko Izumi, Ayako Inoue, Haruka Higuma, Masayuki Kanehisa, Jotaro Akiyoshi
BACKGROUND: Borderline personality disorder (BPD) has a pervasive pattern of instability in interpersonal relationships, self-image, and emotions. BPD may be linked to an abnormal brain anatomy, but little is known about possible impairments of the white matter microstructure in BPD or their relationship with impulsivity or risky behaviors. The aims of the present study were to explore the relationship between BPD and diffusion tensor imaging (DTI) parameters and psychological tests. METHODS: We evaluated 35 un-medicated BPD patients in a medication-free state and 50 healthy controls (HCs)...
September 12, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28922441/evaluation-of-2d-shear-wave-elastography-for-characterisation-of-focal-liver-lesions
#3
Ludmila Gerber, Daniel Fitting, Kajana Srikantharajah, Nina Weiler, Georgia Kyriakidou, Joerg Bojunga, Falko Schulze, Dimitra Bon, Stefan Zeuzem, Mireen Friedrich-Rust
BACKGROUND AND AIM: This is a prospective study for evaluation of 2D-shear wave elastography (2D-SWE) for characterisation and differentiation of benign und malignant focal liver lesions (FLLs). METHODS: The patients referred to our ultrasound unit were prospectively included. B-mode ultrasound and 2D-SWE (Aixplorer® France) were performed for one FLL in each patient. Liver histology and/or contrast-enhanced imaging were used as a reference method. RESULTS: 140 patients with FLL were included...
September 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28922335/the-role-of-68ga-psma-i-t-pet-ct-in-the-pretreatment-staging-of-primary-prostate-cancer
#4
Danielle P Meyrick, Marcus Asokendaran, Laura A Skelly, Nat P Lenzo, Andrew Henderson
OBJECTIVES: This retrospective study aimed to evaluate the role of Ga-PSMA-I&T PET/CT in the primary staging of newly diagnosed prostate cancer (PCa), with a focus on the detection of metastatic nodal disease. Correlation of the rate of detection of metastatic disease by Ga-PSMA-I&T PET/CT with the Gleason score (GS) and serum prostate-specific antigen (PSA) was performed to determine the GS and PSA criteria defining patients who would benefit from Ga-PSMA-I&T PET/CT imaging for staging, risk stratification and therapy optimization...
September 15, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28922332/evaluation-of-corneal-neovascularization-using-optical-coherence-tomography-angiography-in-patients-with-limbal-stem-cell-deficiency
#5
Yoshinori Oie, Kohji Nishida
PURPOSE: Detection of the exact area of corneal neovascularization using slit-lamp photography is often difficult. Thus, we evaluated corneal neovascularization in patients with limbal stem cell deficiency using optical coherence tomography angiography (OCTA). METHODS: Five patients with 5 eyes showing partial or total limbal stem cell deficiency were enrolled. Three eyes had severe corneal scarring. Five 6- × 6-mm images (frontal, upper, lower, nasal, and temporal) were obtained by OCTA...
September 14, 2017: Cornea
https://www.readbyqxmd.com/read/28922330/lamina-cribrosa-thickness-in-patients-with-keratoconus
#6
Serkan Akkaya, Bekir Küçük
PURPOSE: To evaluate the thickness and depth of lamina cribrosa (LC) in the optic nerve head region of the eyes in patients with nonglaucomatous keratoconus and to compare the thickness and depth with those of age-matched controls. METHODS: This was a cross-sectional, observational study comprising 45 patients with keratoconus and 56 healthy subjects. Analysis of LC imaging was performed using spectral domain optical coherence tomography. Data collected included spherical equivalent, central corneal thickness, axial length, intraocular pressure, and keratometry...
September 14, 2017: Cornea
https://www.readbyqxmd.com/read/28922322/-vectra-3d-imaging-for-quantitative-volumetric-analysis-of-the-upper-limb-a-feasibility-study-for-tracking-outcomes-of-lymphedema-treatment
#7
Mark J Landau, Jennifer S Kim, Daniel J Gould, Ketan M Patel
BACKGROUND: Secondary lymphedema of the upper limb is a common sequela following lymphadenectomy during oncologic surgery. The gold standard for evaluating treatment outcomes in upper limb lymphedema is limb volume measurement. However, current techniques lack sensitivity to localized changes. In this study, the Vectra 3D imaging system was utilized to accurately and precisely obtain volume measurements of the upper limb in patients with lymphedema. METHODS: A feasibility study was performed in 11 patients with lymphedema and 22 upper extremities; 24 arms were evaluated in total...
September 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28922275/indications-for-ct-angiography-of-the-vertebral-arteries-after-trauma
#8
Joseph P Drain, Douglas S Weinberg, James S Ramey, Timothy A Moore, Heather A Vallier
STUDY DESIGN: Retrospective. OBJECTIVE: The purpose of this project is to identify factors that predict vertebral artery injury (VAI) in an effort to assess risks and benefits of computed tomography angiography (CT-A) of the neck in the trauma setting. We seek to develop guidelines for practitioners to stratify patients at medium/high risk of VAI from those who are at low risk. SUMMARY OF BACKGROUND DATA: VAI and blunt carotid injury (BCI) together comprise blunt cerebrovascular injury (BCVI)...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28922191/acr-spr-str-practice-parameter-for-the-performance-of-cardiac-positron-emission-tomography-computed-tomography-pet-ct-imaging
#9
Rathan M Subramaniam, Warren R Janowitz, Geoffrey B Johnson, Martin A Lodge, Marguerite T Parisi, Mark R Ferguson, Jeffrey C Hellinger, Gregory W Gladish, Narainder K Gupta
This clinical practice parameter has been developed collaboratively by the American College of Radiology (ACR), the Society for Pediatric Radiology (SPR), and the Society of Thoracic Radiology (STR). This document is intended to act as a guide for physicians performing and interpreting positron emission tomography-computed tomography (PET/CT) of cardiac diseases in adults and children. The primary value of cardiac PET/CT imaging include evaluation of perfusion, function, viability, inflammation, anatomy, and risk stratification for cardiac-related events such as myocardial infarction and death...
September 15, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28922185/a-pilot-study-to-precisely-quantify-forces-applied-by-sonographers-while-scanning-a-step-toward-reducing-ergonomic-injury
#10
Manish Dhyani, Shawn C Roll, Matthew W Gilbertson, Melanie Orlowski, Arash Anvari, Qian Li, Brian Anthony, Anthony E Samir
BACKGROUND: There is a significantly high rate of work-related musculsokeletal injuries in sonography professionals. To date, assessment of risk factors for work- related injuries in sonographers has been based primarily on surveys, subjective reports, and observational methods. There is a need to develop quantitative techniques to better understand risk factors and develop preventive interventions. OBJECTIVE: We pilot tested a high-resolution force-measuring probe capable of precisely measuring forces applied through the transducer by sonographers and used this novel direct measurement technique to evaluate forces during abdominal imaging...
September 14, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28922157/longer-term-investigation-of-the-value-of-18f-fdg-pet-and-magnetic-resonance-imaging-for-predicting-the-conversion-of-mild-cognitive-impairment-to-alzheimer-s-disease-a-multicenter-study
#11
Yoshitaka Inui, Kengo Ito, Takashi Kato
BACKGROUND: The value of fluorine-18-fluorodeoxyglucose positron emission tomography (18F-FDG-PET) and magnetic resonance imaging (MRI) for predicting conversion of mild cognitive impairment (MCI) to Alzheimer's disease (AD) in longer-term is unclear. OBJECTIVE: To evaluate longer-term prediction of MCI to AD conversion using 18F-FDG-PET and MRI in a multicenter study. METHODS: One-hundred and fourteen patients with MCI were followed for 5 years...
September 11, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28922150/synthesis-radiosynthesis-and-preliminary-in-vitro-and-in-vivo-evaluation-of-the-fluorinated-ceramide-trafficking-inhibitor-hpa-12-for-brain-applications
#12
Simone M Crivelli, Andreas Paulus, Jozef Markus, Matthias Bauwens, Dusan Berkes, Helga E De Vries, Monique T Mulder, Jochen Walter, Felix M Mottaghy, Mario Losen, Pilar Martinez-Martinez
Ceramide levels are increased in blood and brain tissue of Alzheimer's disease (AD) patients. Since the ceramide transporter protein (CERT) is the only known protein able to mediate non-vesicular transfer of ceramide between organelle membranes, the modulation of CERT function may impact on ceramide accumulation. The competitive CERT inhibitor N-(3-hydroxy-1-hydroxymethyl-3-phenylpropyl) dodecanamide (HPA-12) interferes with ceramide trafficking. To understand the role of ceramide/CERT in AD, HPA-12 can be a useful tool to modulate ceramide trafficking...
September 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28922146/preliminary-clinical-evaluation-of-automated-analysis-of-the-sublingual-microcirculation-in-the-assessment-of-patients-with-septic-shock-comparison-of-automated-versus-semi-automated-software
#13
Nivin Sharawy, Ahmed Mukhtar, Sufia Islam, Reham Mahrous, Hassan Mohamed, Mohamed Ali, Amr Abd El Hakeem, Osama Hossny, Amera Refaa, Ahmed Saka, Vladimir Cerny, Sara Whynot, Ron George, Christian Lehmann
INTRODUCTION: The outcome of patients in septic shock has been shown to be related to changes within the microcirculation. Modern imaging technologies are available to generate high resolution video recordings of the microcirculation in humans. However, evaluation of the microcirculation is not yet implemented in the routine clinical monitoring of critically ill patients. This is mainly due to large amount of time and user interaction required by the current video analysis software. The aim of this study was to validate a newly developed automated method (CCTools®) for microcirculatory analysis of sublingual capillary perfusion in septic patients in comparison to standard semi-automated software (AVA3®)...
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28922130/haze-removal-using-radial-basis-function-networks-for-visibility-restoration-applications
#14
Bo-Hao Chen, Shih-Chia Huang, Chian-Ying Li, Sy-Yen Kuo
Restoration of visibility in hazy images is the first relevant step of information analysis in many outdoor computer vision applications. To this aim, the restored image must feature clear visibility with sufficient brightness and visible edges, while avoiding the production of noticeable artifacts. In this paper, we propose a haze removal approach based on the radial basis function (RBF) through artificial neural networks dedicated to effectively removing haze formation while retaining not only the visible edges but also the brightness of restored images...
September 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28922120/motion-estimation-in-echocardiography-using-sparse-representation-and-dictionary-learning
#15
Nora Ouzir, Adrian Basarab, Herve Liebgott, Brahim Harbaoui, Jean-Yves Tourneret
This paper introduces a new method for cardiac motion estimation in 2D ultrasound images. The motion estimation problem is formulated as an energy minimization, whose data fidelity term is built using the assumption that the images are corrupted by multiplicative Rayleigh noise. In addition to a classical spatial smoothness constraint, the proposed method exploits the sparse properties of the cardiac motion to regularize the solution via an appropriate dictionary learning step. The proposed method is evaluated on one dataset with available ground-truth, including four sequences of highly realistic simulations...
September 18, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28922117/magnetic-resonance-mediated-radiofrequency-ablation
#16
Yik-Kiong Hue, Alexander R Guimaraes, Ouri Cohen, Erez Nevo, Abraham Roth, Jerome L Ackerman, Jerome L Ackerman
OBJECTIVE: To introduce magnetic resonance mediated radiofrequency ablation (MR-RFA), in which the MRI scanner uniquely serves both diagnostic and therapeutic roles. In MR-RFA scanner-induced RF heating is channeled to the ablation site via a Larmor frequency RF pickup device and needle system, and controlled via the pulse sequence. METHODS: MR-RFA was evaluated with simulation of electric and magnetic fields to predict the increase in local specific-absorption-rate (SAR)...
September 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28922110/an-automated-system-for-the-detection-and-classification-of-retinal-changes-due-to-red-lesions-in-longitudinal-fundus-images
#17
Kedir M Adal, Peter G van Etten, Jose P Martinez, Kenneth W Rouwen, Koenraad A Vermeer, Lucas J van Vliet
People with diabetes mellitus need annual screening to check for the development of diabetic retinopathy. Tracking small retinal changes due to early diabetic retinopathy lesions in longitudinal fundus image sets is challenging due to intra- and inter-visit variability in illumination and image quality, the required high registration accuracy, and the subtle appearance of retinal lesions compared to other retinal features. This paper presents a robust and flexible approach for automated detection of longitudinal retinal changes due to small red lesions by exploiting normalized fundus images that significantly reduce illumination variations and improve the contrast of small retinal features...
September 15, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28922031/optic-nerve-head-characteristics-in-chronic-angle-closure-glaucoma-detected-by-swept-source-oct
#18
Dejiao Li, Taibo Li, Eleftherios I Paschalis, Haobing Wang, Elise V Taniguchi, Zi-Ning Choo, Marissa K Shoji, Scott H Greenstein, Stacey C Brauner, Angela V Turalba, Louis R Pasquale, Lucy Q Shen
PURPOSE: To compare structural features in prelaminar and laminar tissues of the optic nerve head (ONH) in chronic angle closure glaucoma (CACG), primary open angle glaucoma (POAG), and control subjects. MATERIALS AND METHODS: ONH imaging was performed using swept-source optical coherence tomography (SS-OCT) for measurements of minimum rim width at Bruch's membrane opening (BMO-MRW), horizontal, and vertical lamina cribrosa depth (LCD). Prelaminar defects, categorized as hole and wedge, and lamina cribrosa (LC) defects were identified...
September 18, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28921931/technical-note-a-simple-algorithm-to-convert-epid-grey-values-into-absorbed-dose-to-water-without-prior-knowledge
#19
Christine Boutry, Aurélie Sors, Jimmy Fontaine, Nolwenn Delaby, Gregory Delpon
PURPOSE: Full integration of EPID-based dosimetry in a global quality control workflow is still complicated. All the actual solutions are based on a relation between image grey-level signal and total linac delivered dose. In this study, we propose a simple algorithm relying pixel grey-level of EPID image with average linac delivered dose per acquisition frame. METHODS: Calibration models are constructed for Varian and Elekta linacs including scattering conditions and EPID-arm backscatter specific corrections...
September 16, 2017: Medical Physics
https://www.readbyqxmd.com/read/28921910/100-days-with-scans-of-the-same-catphan-phantom-on-the-same-ct-scanner
#20
Ellen Husby, Elisabeth D Svendsen, Hilde K Andersen, Anne Catrine T Martinsen
Quality control (QC) of CT scanners is important to evaluate image quality and radiation dose. Different QC phantoms for testing image quality parameters on CT are commercially available, and Catphan phantoms are widely used for this purpose. More data from measured image quality parameters on CT are necessary to assess test methods, tolerance levels, and test frequencies. The aim of this study was to evaluate the stability of essential image quality parameters for axial and helical scans on one CT scanner over time...
September 18, 2017: Journal of Applied Clinical Medical Physics
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