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https://www.readbyqxmd.com/read/28945054/intracranial-stereotactic-radiosurgery
#1
Andrew A Fanous, Dheerendra Prasad, David Mathieu, Andrew J Fabiano
Stereotactic radiosurgery (SRS) is the use of a single high dose of radiation, stereotactically directed to an intracranial region of interest, in order to create a lesion or obliterate a preexisting one. This technology has evolved over the years into the use of multiple radiation sources oriented at a variety of angles, thus permitting the creation of various treatment target shapes. This allows for non-open surgical treatment of intracranial pathologies, which significantly decreases the risk of morbidity...
September 22, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28944971/a-parallel-mr-imaging-method-using-multilayer-perceptron
#2
Kinam Kwon, Dongchan Kim, HyunWook Park
PURPOSE: To reconstruct MR images from subsampled data, we propose a fast reconstruction method using the multilayer perceptron (MLP) algorithm. METHODS AND MATERIALS: We applied MLP to reduce aliasing artifacts generated by subsampling in k-space. The MLP is learned from training data to map aliased input images into desired alias-free images. The input of the MLP is all voxels in the aliased lines of multi-channel real and imaginary images from the subsampled k-space data, and the desired output is all voxels in the corresponding alias-free line of the root-sum-of-squares of multi-channel images from fully-sampled k-space data...
September 25, 2017: Medical Physics
https://www.readbyqxmd.com/read/28944754/a-double-sided-microscope-to-realize-whole-ganglion-imaging-of-membrane-potential-in-the-medicinal-leech
#3
Yusuke Tomina, Daniel A Wagenaar
Studies of neuronal network emergence during sensory processing and motor control are greatly promoted by technologies that allow us to simultaneously record the membrane potential dynamics of a large population of neurons in single cell resolution. To achieve whole-brain recording with the ability to detect both small synaptic potentials and action potentials, we developed a voltage-sensitive dye (VSD) imaging technique based on a double-sided microscope that can image two sides of a nervous system simultaneously...
September 25, 2017: ELife
https://www.readbyqxmd.com/read/28944641/-unknown-title
#4
(no author information available yet)
Background : the establishment of a colostomy is a difficult time for the patient since it undergoes physical, psychological and social changes resulting in the modification of the body self-image. Purpose and Framework : this study aims to identify adaptation strategies for colostomates who have a disturbance of self-image after a month of surgery depending on the Roy Adaptation Model. Methods : a descriptive quantitative study was realized with a sample of 70 patients with colostomy in the department of surgery Farhat Hached and Sahloul Hospital in Sousse...
August 17, 2017: Recherche en Soins Infirmiers
https://www.readbyqxmd.com/read/28944574/a-novel-approach-for-intra-operative-shape-acquisition-of-the-tibio-femoral-joints-using-3d-laser-scanning-in-computer-assisted-orthopaedic-surgery
#5
Shailesh V Joshi, Philip J Rowe
BACKGROUND: Image registration (IR) is an important process of developing a spatial relationship between pre-operative data and the physical patient in the operation theatre. Current IR techniques for Computer Assisted Orthopaedic Surgery (CAOS) are time consuming and costly. There is a need to automate and accelerate this process. METHODS: Bespoke quick, cost effective, contactless and automated 3D laser scanning techniques based on the DAVID Laserscanner method were designed...
September 24, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28944527/psychophysiological-changes-during-pure-vs-guided-mirror-exposure-therapies-in-women-with-high-body-dissatisfaction-what-are-they-learning-about-their-bodies
#6
Sandra Díaz-Ferrer, Sonia Rodríguez-Ruiz, Blanca Ortega-Roldán, José Luis Mata-Martín, M Carmen Fernández-Santaella
This study aimed to examine the psychophysiological changes resulting from two mirror exposure treatments that are effective at reducing body dissatisfaction. Thirty-five university women with body dissatisfaction and subclinical eating disorders were randomly assigned to one of two groups: pure (n = 17) or guided exposure (n = 18). The participants received six sessions of treatment. Their thoughts, feelings and avoidance behaviours were assessed after each session. Their subjective discomfort, heart rate and skin conductance were assessed within the sessions...
September 24, 2017: European Eating Disorders Review: the Journal of the Eating Disorders Association
https://www.readbyqxmd.com/read/28944279/imaging-subcellular-dynamics-with-fast-and-light-efficient-volumetrically-parallelized-microscopy
#7
Kevin M Dean, Philippe Roudot, Erik S Welf, Theresa Pohlkamp, Gerard Garrelts, Joachim Herz, Reto Fiolka
In fluorescence microscopy, the serial acquisition of 2D images to form a 3D volume limits the maximum imaging speed. This is particularly evident when imaging adherent cells in a light-sheet fluorescence microscopy format, as their elongated morphologies require ~200 image planes per image volume. Here, by illuminating the specimen with three light-sheets, each independently detected, we present a light-efficient, crosstalk free, and volumetrically parallelized 3D microscopy technique that is optimized for high-speed (up to 14 Hz) subcellular (300 nm lateral, 600 nm axial resolution) imaging of adherent cells...
February 20, 2017: Optica
https://www.readbyqxmd.com/read/28944086/development-of-spinal-deformities-in-the-tight-skin-mouse
#8
Bing Li, Jill Pg Urban, Jing Yu
Tight-skin (TSK) mice are commonly used as an animal model to study the pathogenesis of Marfan syndrome (MFS), but little is known of their skeletal phenotype and in particular of the development of the spinal deformities, common in MFS. Here we examined growth of the axial skeletons of TSK and wild-type(B6) mice during their period of rapid growth. The whole bodies of mice, 4-12 weeks of age, were scanned after sacrifice, by micro-computed tomography (microCT). We reconstructed three-dimensional models of the spine and ribs, and measured vertebral body heights and rib lengths using the Mac-based image-processing software "OsiriX"...
2017: Bone Research
https://www.readbyqxmd.com/read/28943856/gender-differences-in-the-perception-of-personalized-half-nude-female-bodies
#9
Sarita Silveira, Katrin M Elvers, Kai Fehse, Marco Paolini
In the current study, we investigated how the perception of half-nude female body representations is altered by framing with information about the presented person. Images from tabloid newspapers were presented to male and female observers, and rated according to their aesthetic appeal while neurofunctional correlates were assessed using functional magnetic resonance imaging. While a generally stronger appetitive response might be expected in men, our results show a significant interaction between framing condition and gender of the observer...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28943696/automated-3d-coronary-sinus-catheter-detection-using-a-scanning-beam-digital-x-ray-system
#10
David A P Dunkerley, Jordan M Slagowski, Lindsay E Bodart, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3D tracking of catheter electrodes concurrent with fluoroscopic display. To facilitate respiratory motion-compensated 3D catheter tracking, an automated coronary sinus (CS) catheter detection algorithm for SBDX was developed. The technique uses the 3D localization capability of SBDX and prior knowledge of the catheter shape. Candidate groups of points representing the CS catheter are obtained from a 3D shape-constrained search...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943687/an-adult-face-bias-in-infants-that-is-modulated-by-face-race
#11
Michelle Heron-Delaney, Fabrice Damon, Paul C Quinn, David Méary, Naiqi G Xiao, Kang Lee, Olivier Pascalis
The visual preferences of infants for adult versus infant faces were investigated. Caucasian 3.5- and 6-month-olds were presented with Caucasian adult versus infant face pairs and Asian adult versus infant face pairs, in both upright and inverted orientations. Both age groups showed a visual preference for upright adult over infant faces when the faces were Caucasian, but not when they were Asian. The preference is unlikely to have arisen because of low-level perceptual features because: (1) no preference was observed for the inverted stimuli, (2) no differences were observed in adult similarity ratings of the upright infant-adult face pairs from the two races, and (3) no differences between the infant and adult faces were observed across races in an image-based analysis of salience...
September 2017: International Journal of Behavioral Development
https://www.readbyqxmd.com/read/28943412/magnetic-resonance-microdynamic-imaging-reveals-distinct-tissue-microenvironments
#12
Dan Benjamini, Peter J Basser
Magnetic resonance imaging (MRI) provides a powerful set of tools with which to investigate biological tissues noninvasively and in vivo. Tissues are heterogeneous in nature; an imaging voxel contains an ensemble of different cells and extracellular matrix components. A long-standing challenge has been to infer the content of and interactions among these microscopic tissue components within a macroscopic imaging voxel. Spatially resolved multidimensional relaxation-diffusion correlation (REDCO) spectroscopy holds the potential to deliver such microdynamic information...
September 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28943164/rare-stress-fracture-longitudinal-fracture-of-the-femur
#13
M Pérez González, P Velázquez Fragua, E López Miralles, M M Abad Moretón
42-year-old man with pain in the posterolateral region of the right knee that began while he was running. Initially, it was diagnosed by magnetic resonance (MR) as a possible aggressive process (osteosarcoma or Ewing's sarcoma) but with computed tomography it was noted a cortical hypodense linear longitudinal image with a continuous, homogeneous and solid periosteal reaction without clear soft tissue mass that in this patient suggest a longitudinal distal femoral fatigue stress fracture. This type of fracture at this location is very rare...
September 21, 2017: Radiología
https://www.readbyqxmd.com/read/28943017/comparison-of-subjective-grading-of-lid-wiper-epitheliopathy-with-a-semi-objective-method
#14
Carolina M E Kunnen, James S Wolffsohn, Eric R Ritchey
PURPOSE: To validate a semi-objective method of grading lid wiper epitheliopathy (LWE) compared to subjective assessment. METHODS: Twenty upper and 20 lower eyelid margins of patients with LWE were photographed after instillation of fluorescein and lissamine green. The images were graded by two observers using a 0-3 grading scale for height (%) and width (mm) of the lid staining. The images were also processed using custom designed software in MATLAB. After manual delineation of the staining area, width and perpendicular height were automatically measured throughout the selected area...
September 21, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28942896/visuo-spatial-orienting-during-active-exploratory-behavior-processing-of-task-related-and-stimulus-related-signals
#15
Emiliano Macaluso, Akitoshi Ogawa
Functional imaging studies have associated dorsal and ventral fronto-parietal regions with the control of visuo-spatial attention. Previous studies demonstrated that the activity of both the dorsal and the ventral attention systems can be modulated by many different factors, related both to the stimuli and the task. However, the vast majority of this work utilized stereotyped paradigms with simple and repeated stimuli. This is at odd with any real life situation that instead involve complex combinations of different types of co-occurring signals, thus raising the question of the ecological significance of the previous findings...
September 5, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28942485/crowdsourcing-and-automated-retinal-image-analysis-for-diabetic-retinopathy
#16
REVIEW
Lucy I Mudie, Xueyang Wang, David S Friedman, Christopher J Brady
PURPOSE OF REVIEW: As the number of people with diabetic retinopathy (DR) in the USA is expected to increase threefold by 2050, the need to reduce health care costs associated with screening for this treatable disease is ever present. Crowdsourcing and automated retinal image analysis (ARIA) are two areas where new technology has been applied to reduce costs in screening for DR. This paper reviews the current literature surrounding these new technologies. RECENT FINDINGS: Crowdsourcing has high sensitivity for normal vs abnormal images; however, when multiple categories for severity of DR are added, specificity is reduced...
September 23, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28942369/slanted-support-window-based-stereo-matching-for-surface-reconstruction-of-microscopic-samples
#17
Ahmadreza Baghaie, Chi Zhang, Ali Bakhshinejad, Heather A Owen, Hongyang Chao, Roshan M D'Souza, Zeyun Yu
This work is to address the limitations of 2D Scanning Electron Microscopy (SEM) micrographs in providing 3D topographical information necessary for various types of analysis in biological and biomedical sciences as well as mechanical and material engineering by investigating modern stereo vision methodologies for 3D surface reconstruction of microscopic samples. To achieve this, micrograph pairs of the microscopic samples are acquired by utilizing an SEM equipped with motor controlled specimen stage capable of precise translational, rotational movements and tilting of the specimen stage...
September 8, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28942290/changing-of-biochemical-parameters-and-cell-wall-polysaccharides-distribution-during-physiological-development-of-tomato-fruit
#18
Monika Chylińska, Monika Szymańska-Chargot, Kamil Deryło, Dorota Tchórzewska, Artur Zdunek
This study was aimed at discovering an impact of biochemical parameters (like content of cell wall polysaccharides, phenolic compounds, ascorbic acid or activity of pectinolytic enzymes) on cell wall microstructure during physiological fruit development. Cell wall microstructure as well as changes in the polysaccharides distribution were examined by confocal Raman microscopy. Also there was a need to simultaneous usage of reference method which is immunolabeling. A tomato fruit (Solanum lycopersicum cv Cerise) has been selected to observe the changes taking place in the fruit cell wall as it recently has been recognized as a model species for exploring fruit development processes such as fruit formation and ripening...
September 14, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28942262/engineering-novel-molecular-beacon-constructs-to-study-intracellular-rna-dynamics-and-localization
#19
REVIEW
Zhao Ma, Xiaotian Wu, Christopher J Krueger, Antony K Chen
With numerous advancements in novel biochemical techniques, our knowledge of the role of RNAs in the regulation of cellular physiology and pathology has grown significantly over the past several decades. Nevertheless, detailed information regarding RNA processing, trafficking, and localization in living cells has been lacking due to technical limitations in imaging single RNA transcripts in living cells with high spatial and temporal resolution. In this review, we discuss techniques that have shown great promise for single RNA imaging, followed by highlights in our recent work in the development of molecular beacons (MBs), a class of nanoscale oligonucleotide-probes, for detecting individual RNA transcripts in living cells...
September 20, 2017: Genomics, Proteomics & Bioinformatics
https://www.readbyqxmd.com/read/28942001/-percutaneous-renal-ablation-pre-per-post-interventional-evaluation-modalities-and-adapted-management
#20
J Garnon, T Tricard, R L Cazzato, X Cathelineau, A Gangi, H Lang
OBJECTIVES: Ablative treatment (AT) rise is foreseen, validation of steps to insure good proceedings is needed. By looking over the process of the patient, this study evaluates the requirements and choices needed in every step of the management. METHODS: We searched MEDLINE(®), Embase(®), using (MeSH) words and we looked for all the studies. Investigators graded the strength of evidence in terms of methodology, language and relevance. RESULTS: Explanations of AT proposal rather than partial nephrectomy or surveillance have to be discussed in a consultation shared by urologist and interventional radiologist...
September 20, 2017: Progrès en Urologie
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