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https://www.readbyqxmd.com/read/28550762/forensic-age-estimation-by-morphometric-analysis-of-the-manubrium-from-3d-mr-images
#1
Naira P Martínez Vera, Johannes Höller, Thomas Widek, Bernhard Neumayer, Thomas Ehammer, Martin Urschler
Forensic age estimation research based on skeletal structures focuses on patterns of growth and development using different bones. In this work, our aim was to study growth-related evolution of the manubrium in living adolescents and young adults using magnetic resonance imaging (MRI), which is an image acquisition modality that does not involve ionizing radiation. In a first step, individual manubrium and subject features were correlated with age, which confirmed a statistically significant change of manubrium volume (Mvol:p<0...
May 12, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28550740/multi-resolution-classification-of-exhaled-aerosol-images-to-detect-obstructive-lung-diseases-in-small-airways
#2
Jinxiang Xi, Weizhong Zhao, Jiayao Eddie Yuan, Biwei Cao, Linlin Zhao
Exhaled aerosol patterns have been used to detect obstructive respiratory diseases in the upper airways. Signals from small airway diseases are weak and may not manifest themselves in the exhaled aerosol patterns. Therefore, it will be more challenging to detect abnormalities in small airways. The objective of this study is to develop a simulation-based classification model that can accurately classify small airway diseases. The model performance was evaluated in five obstructed models that are located in lung bifurcations G7-9...
May 20, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28550650/single-breath-hold-3-d-cine-imaging-of-the-left-ventricle-using-cartesian-sampling
#3
Jens Wetzl, Michaela Schmidt, François Pontana, Benjamin Longère, Felix Lugauer, Andreas Maier, Joachim Hornegger, Christoph Forman
OBJECTIVES: Our objectives were to evaluate a single-breath-hold approach for Cartesian 3-D CINE imaging of the left ventricle with a nearly isotropic resolution of [Formula: see text] and a breath-hold duration of [Formula: see text]19 s against a standard stack of 2-D CINE slices acquired in multiple breath-holds. Validation is performed with data sets from ten healthy volunteers. MATERIALS AND METHODS: A Cartesian sampling pattern based on the spiral phyllotaxis and a compressed sensing reconstruction method are proposed to allow 3-D CINE imaging with high acceleration factors...
May 26, 2017: Magma
https://www.readbyqxmd.com/read/28550406/statistical-shape-modelling-to-aid-surgical-planning-associations-between-surgical-parameters-and-head-shapes-following-spring-assisted-cranioplasty
#4
Naiara Rodriguez-Florez, Jan L Bruse, Alessandro Borghi, Herman Vercruysse, Juling Ong, Greg James, Xavier Pennec, David J Dunaway, N U Owase Jeelani, Silvia Schievano
PURPOSE: Spring-assisted cranioplasty is performed to correct the long and narrow head shape of children with sagittal synostosis. Such corrective surgery involves osteotomies and the placement of spring-like distractors, which gradually expand to widen the skull until removal about 4 months later. Due to its dynamic nature, associations between surgical parameters and post-operative 3D head shape features are difficult to comprehend. The current study aimed at applying population-based statistical shape modelling to gain insight into how the choice of surgical parameters such as craniotomy size and spring positioning affects post-surgical head shape...
May 26, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28550313/quantification-of-hepatocellular-carcinoma-heterogeneity-with-multiparametric-magnetic-resonance-imaging
#5
Stefanie J Hectors, Mathilde Wagner, Octavia Bane, Cecilia Besa, Sara Lewis, Romain Remark, Nelson Chen, M Isabel Fiel, Hongfa Zhu, Sacha Gnjatic, Miriam Merad, Yujin Hoshida, Bachir Taouli
Tumour heterogeneity poses a significant challenge for treatment stratification. The goals of this study were to quantify heterogeneity in hepatocellular carcinoma (HCC) using multiparametric magnetic resonance imaging (mpMRI), and to report preliminary data correlating quantitative MRI parameters with advanced histopathology and gene expression in a patient subset. Thirty-two HCC patients with 39 HCC lesions underwent mpMRI including diffusion-weighted imaging (DWI), blood-oxygenation-level-dependent (BOLD), tissue-oxygenation-level-dependent (TOLD) and dynamic contrast-enhanced (DCE)-MRI...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550282/differences-in-selectivity-to-natural-images-in-early-visual-areas-v1-v3
#6
David D Coggan, Luke A Allen, Oliver R H Farrar, Andre D Gouws, Antony B Morland, Daniel H Baker, Timothy J Andrews
High-level regions of the ventral visual pathway respond more to intact objects compared to scrambled objects. The aim of this study was to determine if this selectivity for objects emerges at an earlier stage of processing. Visual areas (V1-V3) were defined for each participant using retinotopic mapping. Participants then viewed intact and scrambled images from different object categories (bottle, chair, face, house, shoe) while neural responses were measured using fMRI. Our rationale for using scrambled images is that they contain the same low-level properties as the intact objects, but lack the higher-order combinations of features that are characteristic of natural images...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550275/detection-of-small-bowel-tumor-in-wireless-capsule-endoscopy-images-using-an-adaptive-neuro-fuzzy-inference-system
#7
Alizadeh Mahdi, Haji Maghsoudi Omid, Sharzehi Kaveh, Reza Hemati Hamid, Kamali Asl Alireza, Talebpour Alireza
Automatic diagnosis tool helps physicians to evaluate capsule endoscopic examinations faster and more accurate. The purpose of this study was to evaluate the validity and reliability of an automatic post-processing method for identifying and classifying wireless capsule endoscopic images, and investigate statistical measures to differentiate normal and abnormal images. The proposed technique consists of two main stages, namely, feature extraction and classification. Primarily, 32 features incorporating four statistical measures (contrast, correlation, homogeneity and energy) calculated from co-occurrence metrics were computed...
May 26, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28550247/two-novel-mutations-in-the-first-transmembrane-domain-of-presenilin1-cause-young-onset-alzheimer-s-disease
#8
Collin Y Liu, Yu Ohki, Taisuke Tomita, Satoko Osawa, Bruce R Reed, William Jagust, Victoria Van Berlo, Lee-Way Jin, Helena C Chui, Giovanni Coppola, John M Ringman
BACKGROUND: The presenilin-1 protein (PS1) is the catalytic unit of γ-secretase implicated in the production of abnormally long forms of amyloid-β (Aβ), including Aβ42, proteins thought critical in the pathogenesis of Alzheimer's disease (AD). In AD of autosomal dominant inheritance, the majority of pathogenic mutations have been found in the PSEN1 gene within which the location of the mutation can provide clues as to the mechanism of pathogenesis. OBJECTIVE: To describe clinical features of two novel mutations in the transmembrane portion 1 (TMD-1) of PSEN1 as well as biochemical features in one and neuropathological findings in the other...
May 25, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28549884/glomus-tumors-of-the-upper-limb-single-center-retrospective-study-of-clinical-and-functional-outcomes
#9
K Hufschmidt, R Foissac, O Camuzard, N Cardot-Leccia, B Chignon-Sicard, T Balaguer
Glomus tumors are rare and benign hamartomas, arising from neuro-myo-arterial proliferation and deriving from mesenchymal origin. As they have a long-term impact on the individual's quality of life, the primary complaint is unbearable pain. The aim of this study was to assess the clinical and functional outcomes of their surgical treatment, and to review their clinical, radiological and therapeutic features. We performed a retrospective study over a 16-year period including 31 patients with an upper limb glomus tumor...
May 23, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28549629/testicular-tumors-of-adrenogenital-syndrome-from-physiopathology-to-therapy
#10
Sahbi Naouar, Salem Braiek, Rafik El Kamel
Testicular tumor of adrenogenital syndrome is a rare and benign anomaly usually presenting as bilateral testicular masses. It is the most important cause of infertility in adult male congenital adrenal hyperplasia. Distinction between testicular tumors of adrenogenital syndrome and Leydig cell tumors can be problematic; it is based on clinical, histopathologic, immunohistochemical and endocrine features. Biopsy is advised in cases of longstanding tumors in infertile patients and when surgery is indicated. Fertility preservation is a key management goal in testicular tumor of adrenogenital syndrome...
May 23, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28549619/a-mechanical-model-for-diversified-insect-wing-margin-shapes
#11
Yukitaka Ishimoto, Kaoru Sugimura
The wings in different insect species are morphologically distinct with regards to their size, outer contour (margin) shape, venation, and pigmentation. The basis of the diversity of wing margin shapes remains unknown, despite the fact that gene networks governing the Drosophila wing development have been well characterised. Among the different types of wing margin shapes, smoothly curved contour is the most frequently found and implies the existence of a highly organised, multicellular mechanical structure...
May 23, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28549449/fatal-familial-insomnia-with-abnormal-signals-on-routine-mri-a-case-report-and-literature-review
#12
Tingting Lu, Yuhang Pan, Lisheng Peng, Feng Qin, Xiaobo Sun, Zhengqi Lu, Wei Qiu
BACKGROUND: Fatal familial insomnia (FFI) is a rare autosomal dominant disease caused by the PRNP D178N/129 M mutation. Routine brain CT and MRI usually reveal non-specific features. We report a patient with FFI presenting with diffuse abnormal signals on MRI, later confirmed as combined with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). CASE PRESENTATION: The patient was a 58-year-old female, whose main clinical manifestations were insomnia, movement disorders, autonomic hyperactivity and mental deterioration...
May 26, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28549411/fluorender-joint-freehand-segmentation-and-visualization-for-many-channel-fluorescence-data-analysis
#13
Yong Wan, Hideo Otsuna, Holly A Holman, Brig Bagley, Masayoshi Ito, A Kelsey Lewis, Mary Colasanto, Gabrielle Kardon, Kei Ito, Charles Hansen
BACKGROUND: Image segmentation and registration techniques have enabled biologists to place large amounts of volume data from fluorescence microscopy, morphed three-dimensionally, onto a common spatial frame. Existing tools built on volume visualization pipelines for single channel or red-green-blue (RGB) channels have become inadequate for the new challenges of fluorescence microscopy. For a three-dimensional atlas of the insect nervous system, hundreds of volume channels are rendered simultaneously, whereas fluorescence intensity values from each channel need to be preserved for versatile adjustment and analysis...
May 26, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28549410/large-scale-tissue-histopathology-image-classification-segmentation-and-visualization-via-deep-convolutional-activation-features
#14
Yan Xu, Zhipeng Jia, Liang-Bo Wang, Yuqing Ai, Fang Zhang, Maode Lai, Eric I-Chao Chang
BACKGROUND: Histopathology image analysis is a gold standard for cancer recognition and diagnosis. Automatic analysis of histopathology images can help pathologists diagnose tumor and cancer subtypes, alleviating the workload of pathologists. There are two basic types of tasks in digital histopathology image analysis: image classification and image segmentation. Typical problems with histopathology images that hamper automatic analysis include complex clinical representations, limited quantities of training images in a dataset, and the extremely large size of singular images (usually up to gigapixels)...
May 26, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28549320/light-emission-miracle-in-the-sea-and-preeminent-applications-of-bioluminescence-in-recent-new-biotechnology
#15
Sana Sharifian, Ahmad Homaei, Roohullah Hemmati, Khosro Khajeh
Bioluminescence is referred to the light emission by a living organism due to a specific biochemical reaction. This interesting feature of the organisms could highly influences behavioral and ecosystem dynamics. Luminescence, mostly observed in marine species, is generally higher in deep-living genera than in benthic or shallow organisms. However, among creatures living in land, fireflies, beetles, springtails and fungi have shown some bioluminescent activities. Classically, the emission of light is catalyzed by luciferase from a substrate...
May 17, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28549318/brain-neurodevelopmental-markers-related-to-the-deficit-subtype-of-schizophrenia
#16
Tsutomu Takahashi, Yoichiro Takayanagi, Yumiko Nishikawa, Mihoko Nakamura, Yuko Komori, Atsushi Furuichi, Mikio Kido, Daiki Sasabayashi, Kyo Noguchi, Michio Suzuki
Deficit schizophrenia is a homogeneous subtype characterized by a trait-like feature of primary and prominent negative symptoms, but the etiologic factors related to this specific subtype remain largely unknown. This magnetic resonance imaging study aimed to examine gross brain morphology that probably reflects early neurodevelopment in 38 patients with deficit schizophrenia, 37 patients with non-deficit schizophrenia, and 59 healthy controls. Potential brain neurodevelopmental markers investigated in this study were the adhesio interthalamica (AI), cavum septi pellucidi (CSP), and surface morphology (i...
May 20, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28549292/globally-supported-radial-basis-function-based-collocation-method-for-evolution-of-level-set-in-mass-segmentation-using-mammograms
#17
Kanchan Lata Kashyap, Manish Kumar Bajpai, Pritee Khanna
Computer-aided detection systems play an important role for the detection of breast abnormalities using mammograms. Global segmentation of mass in mammograms is a complex process due to low contrast mammogram images, irregular shape of mass, speculated margins, and the presence of intensity variations of pixels. This work presents a new approach for mass detection in mammograms, which is based on the variational level set function. Mesh-free based radial basis function (RBF) collocation approach is employed for the evolution of level set function for segmentation of breast as well as suspicious mass region...
May 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28549077/clinical-criteria-for-subtyping-parkinson-s-disease-biomarkers-and-longitudinal-progression
#18
Seyed-Mohammad Fereshtehnejad, Yashar Zeighami, Alain Dagher, Ronald B Postuma
Parkinson's disease varies widely in clinical manifestations, course of progression and biomarker profiles from person to person. Identification of distinct Parkinson's disease subtypes is of great priority to illuminate underlying pathophysiology, predict progression and develop more efficient personalized care approaches. There is currently no clear way to define and divide subtypes in Parkinson's disease. Using data from the Parkinson's Progression Markers Initiative, we aimed to identify distinct subgroups via cluster analysis of a comprehensive dataset at baseline (i...
May 25, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28549017/diagnosis-of-enlarged-extraocular-muscles-when-and-how-to-biopsy
#19
Ilse Mombaerts, Geoffrey E Rose, David H Verity
PURPOSE OF REVIEW: To review current knowledge regarding diagnosis of nonthyroid orbital disorders with extraocular muscle enlargement. RECENT FINDINGS: Recent publications have focused on immunoglobulin G4-related disease as a possible cause of enlarged extraocular muscles, on patterns of strabismus that raise a clinical suspicion of intramuscular lymphoma, and on surgical techniques to access the muscles for tissue biopsy. SUMMARY: With enlarged extraocular muscles, features to distinguish between competing diagnostic possibilities are based on imaging in the context of history and clinical signs...
April 25, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28549004/efficiency-of-b-mode-ultrasound-and-strain-elastography-in-differentiating-between-benign-and-malignant-cervical-lymph-nodes
#20
Eser Tugut, Cetin Celenk, Asli Tanrivermis Sayit, Tümay Bekci, Hediye Pinar Gunbey, Kerim Arslan
PURPOSE: The purpose of this study was to evaluate the diagnostic accuracy and efficiency of ultrasonography (US), especially when combined with strain elastography (SE), in differentiating between benign and malignant cervical lymph nodes (LNs). METHODS: Forty-one LNs were examined by B-mode US, power Doppler US, and SE. The following imaging features were analyzed: shape, echogenicity, echogenic hilum, calcification, intranodal vascular pattern, elasticity scores (5 categories), and strain ratio...
May 25, 2017: Ultrasound Quarterly
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