keyword
MENU ▼
Read by QxMD icon Read
search

Medical image processing

keyword
https://www.readbyqxmd.com/read/29222573/incidence-and-causes-of-overdiagnosis-of-optic-neuritis
#1
Leanne Stunkel, Nathan H Kung, Bradley Wilson, Collin M McClelland, Gregory P Van Stavern
Importance: Diagnostic error is an important source of medical error. Overdiagnosis of optic neuritis may prompt unnecessary and costly diagnostic tests, procedures, and treatments. Objective: To assess the incidence of and characterize factors contributing to overdiagnosis of acute optic neuritis. Design, Setting, and Participants: In this retrospective clinic-based cross-sectional study of new patient encounters, 122 patients referred for acute optic neuritis at a university-based Midwestern neuro-ophthalmology clinic between January 2014 and October 2016 were studied...
December 7, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29221976/modeling-patient-specific-deformable-mitral-valves
#2
REVIEW
Olivia Ginty, John Moore, Terry Peters, Daniel Bainbridge
Medical imaging has advanced enormously over the last few decades, revolutionizing patient diagnostics and care. At the same time, additive manufacturing has emerged as a means of reproducing physical shapes and models previously not possible. In combination, they have given rise to 3-dimensional (3D) modeling, an entirely new technology for physicians. In an era in which 3D imaging has become a standard for aiding in the diagnosis and treatment of cardiac disease, this visualization now can be taken further by bringing the patient's anatomy into physical reality as a model...
September 7, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29218460/a-novel-adaptive-deformable-model-for-automated-optic-disc-and-cup-segmentation-to-aid-glaucoma-diagnosis
#3
Muhammad Salman Haleem, Liangxiu Han, Jano van Hemert, Baihua Li, Alan Fleming, Louis R Pasquale, Brian J Song
This paper proposes a novel Adaptive Region-based Edge Smoothing Model (ARESM) for automatic boundary detection of optic disc and cup to aid automatic glaucoma diagnosis. The novelty of our approach consists of two aspects: 1) automatic detection of initial optimum object boundary based on a Region Classification Model (RCM) in a pixel-level multidimensional feature space; 2) an Adaptive Edge Smoothing Update model (AESU) of contour points (e.g. misclassified or irregular points) based on iterative force field calculations with contours obtained from the RCM by minimising energy function (an approach that does not require predefined geometric templates to guide auto-segmentation)...
December 7, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29216407/an-open-label-positron-emission-tomography-pet-study-to-evaluate-serotonin-transporter-occupancy-following-escalating-dosing-regimens-of-r-o-desmethylvenlafaxine-and-racemic-o-desmethylvenlafaxine
#4
W Gordon Frankle, Brigitte Robertson, Gary Maier, Jennifer Paris, Deanna Asmonga, Maureen May, Michael L Himes, N Scott Mason, Chester A Mathis, Rajesh Narendran
INTRODUCTION: SEP-227162 [R(-)-O-desmethylvenlafaxine] is an enantiomer of the venlafaxine metabolite O-desmethylvenlafaxine (ODV, Pristiq™, Wyeth). This study compared the serotonin transporter occupancy achieved by SEP-227162 and ODV, at daily doses of 25mg, 50mg, 100mg and 150mg using [11 C]DASB positron emission tomography (PET). METHODS: Sixteen healthy male subjects participated in one of four dose groups (N = 4 per group) during which they were administered two doses of the study drug (SEP-227162 or ODV)...
December 7, 2017: Synapse
https://www.readbyqxmd.com/read/29216188/monitoring-wound-healing-in-a-3d-wound-model-by-hyperspectral-imaging-and-efficient-clustering
#5
Mirwaes Wahabzada, Manuela Besser, Milad Khosravani, Matheus Thomas Kuska, Kristian Kersting, Anne-Katrin Mahlein, Ewa Stürmer
Wound healing is a complex and dynamic process with different distinct and overlapping phases from homeostasis, inflammation and proliferation to remodelling. Monitoring the healing response of injured tissue is of high importance for basic research and clinical practice. In traditional application, biological markers characterize normal and abnormal wound healing. Understanding functional relationships of these biological processes is essential for developing new treatment strategies. However, most of the present techniques (in vitro or in vivo) include invasive microscopic or analytical tissue sampling...
2017: PloS One
https://www.readbyqxmd.com/read/29214153/alzheimer-s-disease-diagnosis-discrepancy-between-clinical-neuroimaging-and-cerebrospinal-fluid-biomarkers-criteria-in-an-italian-cohort-of-geriatric-outpatients-a-retrospective-cross-sectional-study
#6
Giulia A M Dolci, Sarah Damanti, Valeria Scortichini, Alessandro Galli, Paolo D Rossi, Carlo Abbate, Beatrice Arosio, Daniela Mari, Andrea Arighi, Giorgio G Fumagalli, Elio Scarpini, Silvia Inglese, Maura Marcucci
Background: The role of cerebrospinal fluid (CSF) biomarkers, and neuroimaging in the diagnostic process of Alzheimer's disease (AD) is not clear, in particular in the older patients. Objective: The aim of this study was to compare the clinical diagnosis of AD with CSF biomarkers and with cerebrovascular damage at neuroimaging in a cohort of geriatric patients. Methods: Retrospective analysis of medical records of ≥65-year-old patients with cognitive impairment referred to an Italian geriatric outpatient clinic, for whom the CSF concentration of amyloid-β (Aβ), total Tau (Tau), and phosphorylated Tau (p-Tau) was available...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29207568/recent-advances-in-fluorescence-lifetime-analytical-microsystems-contact-optics-and-cmos-time-resolved-electronics
#7
REVIEW
Liping Wei, Wenrong Yan, Derek Ho
Fluorescence spectroscopy has become a prominent research tool with wide applications in medical diagnostics and bio-imaging. However, the realization of combined high-performance, portable, and low-cost spectroscopic sensors still remains a challenge, which has limited the technique to the laboratories. A fluorescence lifetime measurement seeks to obtain the characteristic lifetime from the fluorescence decay profile. Time-correlated single photon counting (TCSPC) and time-gated techniques are two key variations of time-resolved measurements...
December 4, 2017: Sensors
https://www.readbyqxmd.com/read/29201332/an-improved-random-walker-with-bayes-model-for-volumetric-medical-image-segmentation
#8
Chunhua Dong, Xiangyan Zeng, Lanfen Lin, Hongjie Hu, Xianhua Han, Masoud Naghedolfeizi, Dawit Aberra, Yen-Wei Chen
Random walk (RW) method has been widely used to segment the organ in the volumetric medical image. However, it leads to a very large-scale graph due to a number of nodes equal to a voxel number and inaccurate segmentation because of the unavailability of appropriate initial seed point setting. In addition, the classical RW algorithm was designed for a user to mark a few pixels with an arbitrary number of labels, regardless of the intensity and shape information of the organ. Hence, we propose a prior knowledge-based Bayes random walk framework to segment the volumetric medical image in a slice-by-slice manner...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29200686/an-investigation-of-bayes-algorithm-and-neural-networks-for-identifying-the-breast-cancer
#9
E Udayakumar, S Santhi, P Vetrivelan
Context: Breast cancer is a biggest threat to women. X-ray mammography is the most effective method for early detection and screening of breast cancer. It is a tough challenge for the radiologist in reading mammography since it does not provide consistent result every time. Aim: To improve the primary sign of this disease, computer-aided diagnosis schemes have been developed. Using monitor, digital images of mammography are displayed and they can be lightened or darkened before they are printed on the film...
July 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29198733/virtual-medicine-utilization-of-the-advanced-cardiac-imaging-patient-avatar-for-procedural-planning-and-facilitation
#10
REVIEW
Jerold S Shinbane, Leslie A Saxon
Advances in imaging technology have led to a paradigm shift from planning of cardiovascular procedures and surgeries requiring the actual patient in a "brick and mortar" hospital to utilization of the digitalized patient in the virtual hospital. Cardiovascular computed tomographic angiography (CCTA) and cardiovascular magnetic resonance (CMR) digitalized 3-D patient representation of individual patient anatomy and physiology serves as an avatar allowing for virtual delineation of the most optimal approaches to cardiovascular procedures and surgeries prior to actual hospitalization...
November 16, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29197487/no-352-technical-update-the-role-of-early-comprehensive-fetal-anatomy-ultrasound-examination
#11
Ori Nevo, Richard Brown, Phyllis Glanc, Ken Lim
OBJECTIVE: This guideline presents an evidence-based technical update and recommendations for the performance of early comprehensive fetal anatomic scanning (ECFAS) at 11 to 16 weeks' gestation. OPTIONS: Patients at high risk for fetal anomalies and in whom traditional mid-second trimester transabdominal imaging may be challenging or who may benefit from earlier identification of fetal anomalies may be suitable for early fetal anatomy scanning. OUTCOMES: This practice may result in earlier identification of fetal anomalies and provide earlier intervention options in high-risk populations and/or in populations where mid-second trimester transabdominal scanning is challenging...
December 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/29194051/blood-tissue-and-imaging-biomarkers-in-calcific-aortic-valve-stenosis-past-present-and-future
#12
Mylène Shen, Lionel Tastet, Jutta Bergler-Klein, Philippe Pibarot, Marie-Annick Clavel
PURPOSE OF REVIEW: Calcific aortic valve stenosis is the most prevalent valvular heart disease in the high-income countries. To this date, no medical therapy has been proven to prevent or to stop the progression of aortic valve stenosis. The physiopathology of aortic valve stenosis is highly complex and involves several signalling pathways, as well as genetic related factors, which delay the elaboration of effective pharmacotherapies. Moreover, it is difficult to predict accurately the progression of the valve stenosis and finding the optimal timing for aortic valve replacement remains challenging...
November 30, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29194009/bias-in-radiology-the-how-and-why-of-misses-and-misinterpretations
#13
Lindsay P Busby, Jesse L Courtier, Christine M Glastonbury
Medical errors are a leading cause of morbidity and mortality in the medical field and are substantial contributors to medical costs. Radiologists play an integral role in the diagnosis and care of patients and, given that those in this field interpret millions of examinations annually, may therefore contribute to diagnostic errors. Errors can be categorized as a "miss" when a primary or critical finding is not observed or as a "misinterpretation" when errors in interpretation lead to an incorrect diagnosis...
December 1, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29190576/the-semiotics-of-medical-image-segmentation
#14
John S H Baxter, Eli Gibson, Roy Eagleson, Terry M Peters
As the interaction between clinicians and computational processes increases in complexity, more nuanced mechanisms are required to describe how their communication is mediated. Medical image segmentation in particular affords a large number of distinct loci for interaction which can act on a deep, knowledge-driven level which complicates the naive interpretation of the computer as a symbol processing machine. Using the perspective of the computer as dialogue partner, we can motivate the semiotic understanding of medical image segmentation...
November 21, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/29188312/physical-therapists-as-first-line-diagnosticians-for-traumatic-acute-rotator-cuff-tears-a-prospective-study
#15
Knut E Aagaard, Jonas Hänninen, Fikri M Abu-Zidan, Karl Lunsjö
BACKGROUND: Early diagnosis of traumatic acute full-thickness rotator cuff tears (FTRCT) is important to offer early surgical repair. Late repairs following fatty infiltration of the rotator cuff muscles have less favorable results. We think that physical therapists are valuable diagnosticians in a screening process. The objective of this study was to evaluate the usefulness of physical therapists as first-line diagnosticians in detecting acute traumatic FTRCT. METHODS: Between November 2010 and January 2014, 394 consecutive patients having an age between 18 and 75 years who sought medical care because of acute shoulder trauma with acute onset of pain, limited abduction and negative plain radiographs were included in the study...
November 29, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/29184917/surgical-approach-to-anorectal-melanoma-with-pet-ct-staging-a-case-report
#16
Nilufer Bulut, Sevinc Dagıstanlı, Burcak Yılmaz, O Faruk Atay
Rectal hemorrhage should be evaluated within a wide spectrum ranging from benign diseases to a malignant process. Especially, the melanomas of rectum are detected at an advanced stage when diagnosed since the present symptoms of rectal melanomas are similar. The question of what will be the surgical approach with MR, CT, and PET-CT imaging methods performed after histopathological diagnosis still conserves its topicality. PET-CT is a good imaging method for determination of distant metastasis and lymphatic involvement...
October 2017: Surgery Journal
https://www.readbyqxmd.com/read/29182849/ion-trapping-of-amines-in-protozoa-a-novel-removal-mechanism-for-micropollutants-in-activated-sludge
#17
Rebekka Gulde, Sabine Anliker, Hans-Peter Kohler, Kathrin Fenner
To optimize removal of polar organic micropollutants from the water cycle, understanding the processes during activated sludge treatment is essential. In this study, we hypothesize that aliphatic amines, which are highly abundant amongst organic micropollutants, are removed from the water phase in activated sludge through ion trapping in protozoa. In ion trapping, which has been extensively investigated in medical research, the neutral species of amine-containing compounds diffuse through the cell membrane and further into acidic vesicles present in eukaryotic cells such as protozoa...
November 28, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29181430/automatic-selection-of-landmarks-in-t1-weighted-head-mri-with-regression-forests-for-image-registration-initialization
#18
Jianing Wang, Yuan Liu, Jack H Noble, Benoit M Dawant
Medical image registration establishes a correspondence between images of biological structures, and it is at the core of many applications. Commonly used deformable image registration methods depend on a good preregistration initialization. We develop a learning-based method to automatically find a set of robust landmarks in three-dimensional MR image volumes of the head. These landmarks are then used to compute a thin plate spline-based initialization transformation. The process involves two steps: (1) identifying a set of landmarks that can be reliably localized in the images and (2) selecting among them the subset that leads to a good initial transformation...
October 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29181341/odontoideum-bone-revealed-by-c1-c2-dislocation-of-the-cervical-spine-during-a-diving-accident
#19
Lassaad Hassini, Mohamed Ali Khalifa, Zeineb Alaya, Mohamed Laaziz Ben Ayeche, Walid Osman, Mourad Mtaoumi
Introduction: Odontoideum bone or the mobile odontoid process is one of the rarest malformations of the cervico-occipital hinge. It exposes to the atlo-axial instability and to the risk of bulbo-medullary compression threatening then the vital and functional prognosis. We report the case of a 16-year-old patient who was the victim of a raod accident resulting in acervical spine injury. Radiological investigation found an odontoideum bone malformation associated with C1C2 dislocation. Case Report: A 16-year-old patient with no medical history had a road accident...
July 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29177790/computational-intelligence-for-medical-imaging-simulations
#20
Victor Chang
This paper describes how to simulate medical imaging by computational intelligence to explore areas that cannot be easily achieved by traditional ways, including genes and proteins simulations related to cancer development and immunity. This paper has presented simulations and virtual inspections of BIRC3, BIRC6, CCL4, KLKB1 and CYP2A6 with their outputs and explanations, as well as brain segment intensity due to dancing. Our proposed MapReduce framework with the fusion algorithm can simulate medical imaging...
November 25, 2017: Journal of Medical Systems
keyword
keyword
104068
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"