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https://www.readbyqxmd.com/read/27834658/single-channel-sparse-nonnegative-blind-source-separation-method-for-automatic-3d-delineation-of-lung-tumor-in-pet-images
#1
Ivica Kopriva, Wei Ju, Bin Zhang, Fei Shi, Dehui Xiang, Kai Yu, Ximing Wang, Ulas Bagci, Xinjian Chen
In this paper, we propose a novel method for single-channel blind separation of non-overlapped sources and, to the best of our knowledge, apply it for the first time to automatic segmentation of lung tumors in Positron Emission Tomography (PET) images. Our approach first converts 3D PET image into a pseudo multichannel image. Afterwards, regularization free sparseness constrained nonnegative matrix factorization is used to separate tumor from other tissues. By using complexity based criterion, we select tumor component as the one with minimal complexity...
November 3, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27587951/a-comparison-of-substantia-nigra-t1-hyperintensity-in-parkinson-s-disease-dementia-alzheimer-s-disease-and-age-matched-controls-volumetric-analysis-of-neuromelanin-imaging
#2
Won-Jin Moon, Ju-Yeon Park, Won-Sung Yun, Ji Yeong Jeon, Yeon Sil Moon, Heejin Kim, Ki-Chang Kwak, Jong-Min Lee, Seol-Heui Han
OBJECTIVE: Neuromelanin loss of substantia nigra (SN) can be visualized as a T1 signal reduction on T1-weighted high-resolution imaging. We investigated whether volumetric analysis of T1 hyperintensity for SN could be used to differentiate between Parkinson's disease dementia (PDD), Alzheimer's disease (AD) and age-matched controls. MATERIALS AND METHODS: This retrospective study enrolled 10 patients with PDD, 18 patients with AD, and 13 age-matched healthy elderly controls...
September 2016: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/27424475/analysis-of-hemorrhage-volumes-after-angiogram-negative-subarachnoid-hemorrhage
#3
David P Bray, Jason A Ellis, Sean D Lavine, Philip M Meyers, E Sander Connolly
BACKGROUND: Antiplatelet medication use is associated with worsened outcome after angiogram-negative subarachnoid hemorrhage (SAH). It has been hypothesized that these worsened outcomes may be the result of an association between antiplatelet medication use and increased hemorrhage volumes after angiogram-negative SAH. To test this hypothesis, we performed volumetric analysis of CT-defined hemorrhage after angiogram-negative SAH. METHODS: A retrospective analysis of patients presenting with non-traumatic, angiogram-negative SAH in the Columbia University Subarachnoid Hemorrhage Outcomes database from 2000 to 2013 was performed...
July 14, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27423658/dilated-perivascular-spaces-and-fatigue-is-there-a-link-magnetic-resonance-retrospective-3tesla-study
#4
Renata Conforti, Mario Cirillo, Angela Sardaro, Giuseppina Caiazzo, Alberto Negro, Antonella Paccone, Rosaria Sacco, Maddalena Sparaco, Antonio Gallo, Luigi Lavorgna, Gioacchino Tedeschi, Sossio Cirillo
INTRODUCTION: Fatigue (F) is a common, inexplicable, and disabling symptom in multiple sclerosis (MS) patients. The purpose of this study was to evaluate a possible correlation between fatigue and morpho-volumetric features and site of dilated perivascular spaces (dPS), visible on 3T magnetic resonance (MR) in fatigued multiple sclerosis patients (FMS). METHODS: We studied 82 relapsing remitting (RR) FMS patients and 43 HC, matched for age, sex, and education. F was assessed by the Fatigue Severity Scale (FSS)...
September 2016: Neuroradiology
https://www.readbyqxmd.com/read/27393350/the-effects-of-sequential-treatments-on-hippocampal-volumes-in-malignant-glioma-patients
#5
Shantell C Nolen, Brian Lee, Shruti Shantharam, Hon J Yu, Lydia Su, John Billimek, Daniela A Bota
Malignant gliomas (MG) are very aggressive tumors. In an effort to improve the outcome, the patients receive multi-modal therapies such as surgery, radiation and chemotherapy (temozolomide followed in many cases by bevacizumab). The survivors are affected by multiple learning and memory deficits. Greater deterioration over time in hippocampal specific cognitive tasks was shown in patients receiving bevacizumab in addition to radiation and temozolomide for a longer period of time (RTOG 0825). The rate of hippocampal atrophy in patients treated with radiation and temozolomide followed by bevacizumab is not yet determined, and is the goal of the present study...
September 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27127335/performance-management-of-high-performance-computing-for-medical-image-processing-in-amazon-web-services
#6
Shunxing Bao, Stephen M Damon, Bennett A Landman, Aniruddha Gokhale
Adopting high performance cloud computing for medical image processing is a popular trend given the pressing needs of large studies. Amazon Web Services (AWS) provide reliable, on-demand, and inexpensive cloud computing services. Our research objective is to implement an affordable, scalable and easy-to-use AWS framework for the Java Image Science Toolkit (JIST). JIST is a plugin for Medical-Image Processing, Analysis, and Visualization (MIPAV) that provides a graphical pipeline implementation allowing users to quickly test and develop pipelines...
February 27, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/26703130/quantification-of-cerebral-edema-after-subarachnoid-hemorrhage
#7
H Alex Choi, Suhas S Bajgur, Wesley H Jones, Jude P J Savarraj, Sang-Bae Ko, Nancy J Edwards, Tiffany R Chang, Georgene W Hergenroeder, Mark J Dannenbaum, P Roc Chen, Arthur L Day, Dong H Kim, Kiwon Lee, James C Grotta
BACKGROUND: Global cerebral edema (GCE) is a manifestation of early brain injury (EBI) after subarachnoid hemorrhage (SAH) and is an independent risk factor for poor outcome. The lack of a quantitative method to measure GCE limits the study of its pathophysiology. The goal of this study is to develop a quantitative surrogate marker that represents GCE after SAH. METHODS: Patients with spontaneous SAH were enrolled into a prospective observational database. Initial CT scans were graded for GCE using established qualitative criteria...
August 2016: Neurocritical Care
https://www.readbyqxmd.com/read/26633880/untwisting-the-caenorhabditis-elegans-embryo
#8
Ryan Patrick Christensen, Alexandra Bokinsky, Anthony Santella, Yicong Wu, Javier Marquina-Solis, Min Guo, Ismar Kovacevic, Abhishek Kumar, Peter W Winter, Nicole Tashakkori, Evan McCreedy, Huafeng Liu, Matthew McAuliffe, William Mohler, Daniel A Colón-Ramos, Zhirong Bao, Hari Shroff
The nematode Caenorhabditis elegans possesses a simple embryonic nervous system with few enough neurons that the growth of each cell could be followed to provide a systems-level view of development. However, studies of single cell development have largely been conducted in fixed or pre-twitching live embryos, because of technical difficulties associated with embryo movement in late embryogenesis. We present open-source untwisting and annotation software (http://mipav.cit.nih.gov/plugin_jws/mipav_worm_plugin...
December 3, 2015: ELife
https://www.readbyqxmd.com/read/26482912/a-survey-of-dicom-viewer-software-to-integrate-clinical-research-and-medical-imaging
#9
Daniel Haak, Charles-E Page, Thomas M Deserno
The digital imaging and communications in medicine (DICOM) protocol is the leading standard for image data management in healthcare. Imaging biomarkers and image-based surrogate endpoints in clinical trials and medical registries require DICOM viewer software with advanced functionality for visualization and interfaces for integration. In this paper, a comprehensive evaluation of 28 DICOM viewers is performed. The evaluation criteria are obtained from application scenarios in clinical research rather than patient care...
April 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/26438467/csf-volumetric-analysis-for-quantification-of-cerebral-edema-after-hemispheric-infarction
#10
Rajat Dhar, Kristy Yuan, Tobias Kulik, Yasheng Chen, Laura Heitsch, Hongyu An, Andria Ford, Jin-Moo Lee
BACKGROUND: Malignant cerebral edema (CED) complicates at least 20 % of large hemispheric infarcts (LHI) and may result in neurological deterioration or death. Midline shift (MLS) is a standard but crude measure of edema severity. We propose that volumetric analysis of shifts in cerebrospinal fluid (CSF) over time provides a reliable means of quantifying the spectrum of edema severity after LHI. METHODS: We identified 38 patients from 2008 to 2014 with NIHSS ≥8, baseline CT <6 h after stroke onset, at least 1 follow-up (FU) CT, and no parenchymal hematoma...
June 2016: Neurocritical Care
https://www.readbyqxmd.com/read/25901839/transient-vision-loss-after-ocriplasmin-injection
#11
Benjamin Reiss, Lindsay Smithen, Sam Mansour
PURPOSE: Transient vision loss is a poorly understood complication of ocriplasmin injection. METHODS: The authors performed a retrospective medical records review of consecutive patients who received ocriplasmin for the treatment of vitreomacular adhesion at The George Washington University Department of Ophthalmology and the Virginia Retinal Center from January 1, 2013, to March 1, 2014, and who had at least 28 days of follow-up. Ellipsoid zone loss on optical coherence tomography was analyzed using the National Institutes of Health's Medical Imaging, Processing, Analysis, and Visualization (MIPAV) software...
June 2015: Retina
https://www.readbyqxmd.com/read/24318825/segmentation-and-quantitative-analysis-of-individual-cells-in-developmental-tissues
#12
Kaustav Nandy, Jusub Kim, Dean P McCullough, Matthew McAuliffe, Karen J Meaburn, Terry P Yamaguchi, Prabhakar R Gudla, Stephen J Lockett
Image analysis is vital for extracting quantitative information from biological images and is used extensively, including investigations in developmental biology. The technique commences with the segmentation (delineation) of objects of interest from 2D images or 3D image stacks and is usually followed by the measurement and classification of the segmented objects. This chapter focuses on the segmentation task and here we explain the use of ImageJ, MIPAV (Medical Image Processing, Analysis, and Visualization), and VisSeg, three freely available software packages for this purpose...
2014: Methods in Molecular Biology
https://www.readbyqxmd.com/read/24297592/dilated-virchow-robin-spaces-and-multiple-sclerosis-3-t-magnetic-resonance-study
#13
Renata Conforti, Mario Cirillo, Pietro Paolo Saturnino, Antonio Gallo, Rosaria Sacco, Alberto Negro, Antonella Paccone, Giuseppina Caiazzo, Alvino Bisecco, Simona Bonavita, Sossio Cirillo
PURPOSE: The aim of this study was to assess differences in the presence, size, number and site of dilated cerebral Virchow-Robin spaces (VRSd) between patients with multiple sclerosis (MS) in the inactive phase and healthy controls, and between MS patients with disabling (MSd) or nondisabling (MSnd) disease. MATERIALS AND METHODS: The study was performed by retrospectively analysing the 3 T magnetic resonance studies of 40 MS patients and 30 healthy subjects (matched for age, education and gender)...
June 2014: La Radiologia Medica
https://www.readbyqxmd.com/read/23233387/reliability-of-hematoma-volume-measurement-at-local-sites-in-a-multicenter-acute-intracerebral-hemorrhage-clinical-trial
#14
MULTICENTER STUDY
Haitham M Hussein, Nauman A Tariq, Yuko Y Palesch, Adnan I Qureshi
BACKGROUND AND PURPOSE: The reliability of hematoma volume (HV) measurement using the ABC/2 method in multicenter clinical trials is unknown. We determined the accuracy of ABC/2 method as an on-site test in comparison with the gold standard central HV-assessment and semiautomatic HV-assessment. Method- We analyzed data from an acute intracerebral hemorrhage multicenter clinical trial. HV was measured by site investigators to determine enrollment eligibility (<60 cm(3)) using the ABC/2 method (on-site HV), and independently by the core-imaging laboratory using computer-based analysis (Medical Image Processing, Analysis, and Visualization [MIPAV] HV)...
January 2013: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/23210046/the-relationship-between-subarachnoid-hemorrhage-volume-and-development-of-cerebral-vasospasm
#15
Sang-Won Jung, Chang-Young Lee, Man-Bin Yim
OBJECTIVE: The objective of this study is to verify the relationship between subarachnoid hemorrhage (SAH) volume (not Fisher grade) and development of cerebral vasospasm prospectively. METHODS: Patients who visited our hospital with a diffuse or localized thick subarachnoid blood clot seen on computed tomography (CT), taken within 48 hours after SAH and the aneurysm was confirmed by CT Angiogram (CTA) from March 2010 to July 2011 were enrolled in this study. CTA was checked at least twice after admission...
September 2012: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/22884010/the-relationship-between-the-anterior-corpus-callosum-size-and-prefrontal-cortex-volume-in-drug-free-depressed-patients
#16
Ozgun Ozalay, Cem Calli, Omer Kitis, M Cagdas Eker, Ozlem Donat Eker, Erol Ozan, Kerry Coburn, Ali Saffet Gonul
INTRODUCTION: An evolving literature suggests a volume reduction and a loss of functional integrity of prefrontal cortex in depressed patients. Interhemispheric prefrontal functional integrity is mediated via the anterior portion of the corpus callosum. Until recently interhemispheric fibers connecting prefrontal cortex have not been well defined. In this study, we compared the corpus callosum area of depressed patients with controls using a novel schema proposed by Hofer and Frahm (2006) which defined a specific anterior callosal area for prefrontal interhemispheric fibers...
April 5, 2013: Journal of Affective Disorders
https://www.readbyqxmd.com/read/22674456/bmp-induced-inflammation-a-comparison-of-rhbmp-7-and-rhbmp-2
#17
COMPARATIVE STUDY
Kwang-Bok Lee, Cyrus E Taghavi, Samuel S Murray, Kyung-Jin Song, Gun Keorochana, Jeffrey C Wang
Concern has been raised because of reports of inflammatory swelling following the use of recombinant human bone morphogenetic protein-2 (rhBMP-2) and recombinant human bone morphogenetic protein-7 (rhBMP-7). The purpose of this study is to compare the inflammatory action of rhBMP-7 with those of rhBMP-2. ELISA assays (IL-6, TNF-α) were used to measure the cytokine response to different concentrations of rhBMP-7 and -2. Recombinant human BMP-7 was absorbed into absorbable collagen sponges and different amounts were implanted either subcutaneously (SC) or intramuscularly (IM) into the backs of rats...
December 2012: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/22516042/corpus-callosum-morphology-in-children-who-stutter
#18
Ai Leen Choo, Soo-Eun Chang, Hatun Zengin-Bolatkale, Nicoline G Ambrose, Torrey M Loucks
UNLABELLED: Multiple studies have reported both functional and neuroanatomical differences between adults who stutter and their normally fluent peers. However, the reasons for these differences remain unclear although some developmental data suggest that structural brain differences may be present in school-age children who stutter. In the present study, the corpus callosum of children with persistent stuttering, children who recovered from stuttering and typically developing children between 9 and 12 years of age was compared to test if the presence of aberrant callosal morphology is implicated in this disorder...
July 2012: Journal of Communication Disorders
https://www.readbyqxmd.com/read/21556373/fractal-analysis-reveals-reduced-complexity-of-retinal-vessels-in-cadasil
#19
Michele Cavallari, Teresa Falco, Marina Frontali, Silvia Romano, Francesca Bagnato, Francesco Orzi
The Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL) affects mainly small cerebral arteries and leads to disability and dementia. The relationship between clinical expression of the disease and progression of the microvessel pathology is, however, uncertain as we lack tools for imaging brain vessels in vivo. Ophthalmoscopy is regarded as a window into the cerebral microcirculation. In this study we carried out an ophthalmoscopic examination in subjects with CADASIL...
2011: PloS One
https://www.readbyqxmd.com/read/21242879/inflammatory-characteristics-of-rhbmp-2-in-vitro-and-in-an-in-vivo-rodent-model
#20
COMPARATIVE STUDY
Kwang-Bok Lee, Cyrus E Taghavi, Kyung-Jin Song, Chananit Sintuu, Jeong Hyun Yoo, Gun Keorochana, Shia-Tzu Tzeng, Zhiqiang Fei, Jen-Chung Liao, Jeffrey C Wang
STUDY DESIGN: In vivo and in vitro model. OBJECTIVE: Investigate soft-tissue inflammation caused by rhBMP-2. SUMMARY OF BACKGROUND DATA: Although rhBMP-2 produces excellent rates of fusion in the spine, dysphagia and respiratory compromise have occurred when used in the neck. The mechanism of the swelling and inflammatory response has yet to be fully elucidated. METHODS: ELISA kits (IL-6, IL-10, TNF-α) were used to measure cytokine levels at different concentrations of rhBMP-2...
February 1, 2011: Spine
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