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Medical image processing

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https://www.readbyqxmd.com/read/27911354/a-spectral-interior-ct-by-a-framelet-based-reconstruction-algorithm
#1
Yingmei Wang, Ge Wang, Shuwei Mao, Wenxiang Cong, Zhilong Ji, Jian-Feng Cai, Yangbo Ye
Reducing radiation dose is an important goal in medical computed tomography (CT), for which interior tomography is an effective approach. There have been interior reconstruction algorithms for monochromatic CT, but in reality, X-ray sources are polychromatic. Using a polychromatic acquisition model and motivated by framelet-based image processing algorithms, in this paper, we propose an interior reconstruction algorithm to obtain an image with spectral information assuming only one scan with a current energy-integrating detector...
November 22, 2016: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/27910205/neurosurgical-robotic-arm-drilling-navigation-system
#2
Chung-Chih Lin, Hsin-Cheng Lin, Wen-Yo Lee, Shih-Tseng Lee, Chieh-Tsai Wu
BACKGROUND: The aim of this work was to develop a neurosurgical robotic arm drilling navigation system that provides assistance throughout the complete bone drilling process. METHODS: The system comprised neurosurgical robotic arm navigation combining robotic and surgical navigation, 3D medical imaging based surgical planning that could identify lesion location and plan the surgical path on 3D images, and automatic bone drilling control that would stop drilling when the bone was to be drilled-through...
December 2, 2016: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/27908536/the-sensitivity-and-negative-predictive-value-of-a-pediatric-cervical-spine-clearance-algorithm-that-minimizes-computerized-tomography
#3
Mary Arbuthnot, David P Mooney
BACKGROUND: It is crucial to identify cervical spine injuries while minimizing ionizing radiation. This study analyzes the sensitivity and negative predictive value of a pediatric cervical spine clearance algorithm. METHODS: We performed a retrospective review of all children <21years old who were admitted following blunt trauma and underwent cervical spine clearance utilizing our institution's cervical spine clearance algorithm over a 10-year period. Age, gender, International Classification of Diseases 9th Edition diagnosis codes, presence or absence of cervical collar on arrival, Injury Severity Score, and type of cervical spine imaging obtained were extracted from the trauma registry and electronic medical record...
October 27, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27906845/an-algorithmic-approach-using-ultrasonography-in-the-diagnosis-of-pediatric-nasal-bone-fracture
#4
Ikkei Tamada, Takaaki Mori, Nobuaki Inoue, Hirokazu Shido, Marie Aoki, Yukie Nakamura, Ruri Kamogawa
BACKGROUND: Ultrasonography (US) was recently reported as a reliable modality for diagnosing nasal bone fractures. However, whether US is reliable as a screening tool in the pediatric emergency department (ED) remains unknown. This prospective cohort study had a 2-fold aim: to assess the utility of US in the diagnosis of pediatric nasal bone fracture, and to evaluate the validity of our protocol for managing pediatric nasal bone fractures (Fuchu-Kids algorithm). PATIENTS AND METHODS: Among the patients who presented at the ED with facial trauma, those with a suspected nasal bone fracture were enrolled in the study...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906270/stochastic-model-for-quantum-noise-analysis-in-flat-panel-detectors-for-medical-imaging-applications
#5
Isao Yamada
A one-dimensional stochastic model is proposed to analyze the characteristics of quantum noise in flat-panel detectors (FPD) for medical imaging applications. The number of x-ray photons is modeled as a Poisson process, and explicit expressions for the autocorrelation function and noise power spectrum density (NPSD) are obtained in terms of the exposure dose, blur shape in the capture element, and pixel size. The results from the proposed model are validated with numerical simulations, and it is shown that this model can be used for the analysis of the noise properties of the FPD...
December 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27904975/rayplus-a-web-based-platform-for-medical-image-processing
#6
Rong Yuan, Ming Luo, Zhi Sun, Shuyue Shi, Peng Xiao, Qingguo Xie
Medical image can provide valuable information for preclinical research, clinical diagnosis, and treatment. As the widespread use of digital medical imaging, many researchers are currently developing medical image processing algorithms and systems in order to accommodate a better result to clinical community, including accurate clinical parameters or processed images from the original images. In this paper, we propose a web-based platform to present and process medical images. By using Internet and novel database technologies, authorized users can easily access to medical images and facilitate their workflows of processing with server-side powerful computing performance without any installation...
November 30, 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/27902956/usefulness-of-cervical-computed-tomography-and-magnetic-resonance-imaging-for-rapid-diagnosis-of-crowned-dens-syndrome-a-case-report-and-review-of-the-literature
#7
Akihiro Inoue, Kanehisa Kohno, Satoko Ninomiya, Hitomi Tomita, Shinji Iwata, Shiro Ohue, Kenji Kamogawa, Kensho Okamoto, Shinya Fukumoto, Haruhisa Ichikawa, Shinji Onoue, Saya Ozaki, Bungo Okuda
INTRODUCTION: Crowned dens syndrome is a rare disease entity which radiologically shows calcification of the cruciform ligament around the odontoid process. We report a patient with crowned dens syndrome who improved dramatically in 5days following treatment with oral nonsteroidal anti-inflammatory medication. PRESENTATION OF CASE: A 61-year-old man was admitted to our hospital with a severe occipital headache and sudden onset of neck stiffness. Neurological examination on admission revealed a high fever and cervical rigidity...
November 23, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27893671/scoliosis-secondary-to-lumbar-osteoid-osteoma-a-case-report-of-delayed-diagnosis-and-literature-review
#8
Haiping Zhang, Xingbang Niu, Biao Wang, Simin He, Dingjun Hao
RATIONALE: Lumbar osteoid osteoma has a low incidence, which could easily lead to scoliosis. PATIENT CONCERNS: Scoliosis secondary to lumbar osteoid osteoma could be easily misdiagnosed when patients do not complain of obvious symptoms. DIAGNOSES: We reported a case of a 9-year-old boy with back deformity that was firstly diagnosed with scoliosis at the local hospital. After prescribed with orthosis, the patient experienced aggravating pain that could not be relieved with painkillers...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27889399/a-natural-language-processing-based-model-to-automate-mri-brain-protocol-selection-and-prioritization
#9
Andrew D Brown, Thomas R Marotta
RATIONALE AND OBJECTIVES: Incorrect imaging protocol selection can contribute to increased healthcare cost and waste. To help healthcare providers improve the quality and safety of medical imaging services, we developed and evaluated three natural language processing (NLP) models to determine whether NLP techniques could be employed to aid in clinical decision support for protocoling and prioritization of magnetic resonance imaging (MRI) brain examinations. MATERIALS AND METHODS: To test the feasibility of using an NLP model to support clinical decision making for MRI brain examinations, we designed three different medical imaging prediction tasks, each with a unique outcome: selecting an examination protocol, evaluating the need for contrast administration, and determining priority...
November 23, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27886161/cardiac-ct-in-the-emergency-department-in-the-era-of-highly-sensitive-troponins-is-there-still-a-role
#10
Admir Dedic, Koen Nieman, Udo Hoffmann, Maros Ferencik
INTRODUCTION: Physicians practicing cardiovascular medicine are every day confronted with patients presenting with symptoms suggestive of an acute coronary syndrome (ACS). Over the years, there have been substantial technical advances, such as the introduction of new non-invasive imaging techniques and the introduction of new highly sensitive cardiac biomarkers. EVIDENCE ACQUISITION AND SYNTHESIS: Physicians have adopted these new assets and have become more experienced with them thus improving medical care...
November 25, 2016: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/27885353/a-comparison-of-the-effects-of-alpha-and-medical-grade-honey-ointments-on-cutaneous-wound-healing-in-rats
#11
Shahram Paydar, Majid Akrami, Amirreza Dehghanian, Roshanak Alavi Moghadam, Mohsen Heidarpour, Amir Bahari Khoob, Behnam Dalfardi
Introduction. This study compared the healing efficacy and possible adverse effects of topical Alpha and medical-grade honey ointments on cutaneous wounds in rats. Methods. To conduct the study, 22 male Sprague-Dawley rats were randomly allocated into two equal groups: (1) rats with Alpha ointment applied to the wound surface area and (2) rats with medical-grade honey ointment applied to their wounds. The ointments were applied daily during the 21-day study period. Wound contraction was examined photographically with images taken on days 0, 7, and 21 after wounding...
2016: Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27884129/in-vivo-optical-coherence-tomography-visualization-of-intraplaque-neovascularization-at-the-site-of-coronary-vasospasm-a-case-report
#12
Kenichi Tsujita, Koichi Kaikita, Satoshi Araki, Toshihiro Yamada, Suguru Nagamatsu, Kenshi Yamanaga, Kenji Sakamoto, Sunao Kojima, Seiji Hokimoto, Hisao Ogawa
BACKGROUND: Coronary plaques in patients with coronary vasospastic angina have been characterized by diffuse intima-media thickening with homogeneous fibrous tissue, without confluent necrotic tissue. However, coronary vasospasm can trigger coronary thrombosis, and may play an important role in the pathogenesis of acute coronary syndromes, though the precise morphological mechanisms underlying this process remain unclear. CASE PRESENTATION: A 43-year-old man with a history of multivessel coronary vasospastic angina had been treated with long-acting diltiazem and fluvastatin since 2004...
November 25, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27876601/bioapplications-of-graphene-constructed-functional-nanomaterials
#13
REVIEW
Arif Gulzar, Piaoping Yang, Fei He, Jiating Xu, Dan Yang, Liangge Xu, Mohammad Omar Jan
Graphene has distinctive mechanical, electronic, and optical properties, which researchers have applied to develop innovative electronic materials including transparent conductors and ultrafast transistors. Lately, the understanding of various chemical properties of graphene has expedited its application in high-performance devices that generate and store energy. Graphene is now increasing its terrain outside electronic and chemical applications toward biomedical areas such as precise bio sensing through graphene-quenched fluorescence, graphene-enhanced cell differentiation and growth, and graphene-assisted laser desorption/ionization for mass spectrometry...
November 19, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27876102/structural-functional-brain-changes-in-depressed-patients-during-and-after-electroconvulsive-therapy
#14
Antoine Yrondi, Patrice Péran, Anne Sauvaget, Laurent Schmitt, Christophe Arbus
OBJECTIVES: Electroconvulsive therapy (ECT) is a non-pharmacological treatment that is effective in treating severe and treatment-resistant depression. Although the efficacy of ECT has been demonstrated to treat major depressive disorder (MDD), the brain mechanisms underlying this process remain unclear. Structural-functional changes occur with the use of ECT as a treatment for depression based on magnetic resonance imaging (MRI). For this reason, we have tried to identify the changes that were identified by MRI to try to clarify some operating mechanisms of ECT...
November 23, 2016: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/27875219/automatic-tracking-and-motility-analysis-of-human-sperm-in-time-lapse-images
#15
Leonardo Urbano, Puneet Masson, Matthew VerMilyea, Moshe Kam
We present a fully automated multi-sperm tracking algorithm. It has the demonstrated capability to detect and track simultaneously hundreds of sperm cells in recorded videos while accurately measuring motility parameters over time and with minimal operator intervention. Algorithms of this kind may help in associating dynamic swimming parameters of human sperm cells with fertility and fertilization rates. Specifically, we offer an image processing method, based on radar tracking algorithms, that detects and tracks automatically the swimming paths of human sperm cells in timelapse microscopy image sequences of the kind that is analyzed by fertility clinics...
November 18, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27875147/gazedx-interactive-visual-analytics-framework-for-comparative-gaze-analysis-with-volumetric-medical-images
#16
Hyunjoo Song, Jeongjin Lee, Tae Jung Kim, Kyoung Ho Lee, Bohyoung Kim, Jinwook Seo
We present an interactive visual analytics framework, GazeDx (abbr. of GazeDiagnosis), for the comparative analysis of gaze data from multiple readers examining volumetric images while integrating important contextual information with the gaze data. Gaze pattern comparison is essential to understanding how radiologists examine medical images, and to identifying factors influencing the examination. Most prior work depended upon comparisons with manually juxtaposed static images of gaze tracking results. Comparative gaze analysis with volumetric images is more challenging due to the additional cognitive load on 3D perception...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27873382/use-of-a-novel-board-game-in-a-clinical-rotation-for-learning-thoracic-differential-diagnoses-in-veterinary-medical-imaging
#17
Christopher P Ober
When confronted with various findings on thoracic radiographs, fourth-year veterinary students often have difficulty generating appropriate lists of differential diagnoses. The purpose of this one-group, pretest, posttest experimental study was to determine if a game could be used as an adjunct teaching method to improve students' understanding of connections between imaging findings and differential diagnoses. A novel board game focusing on differential diagnoses in thoracic radiography was developed. One hundred fourth-year veterinary students took a brief pretest, played the board game, and took a brief posttest as a part of their respective clinical radiology rotations...
November 21, 2016: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27872126/multiple-ligament-reconstruction-femoral-tunnels-intertunnel-relationships-and-guidelines-to-avoid-convergence
#18
Gilbert Moatshe, Alex W Brady, Erik L Slette, Jorge Chahla, Travis Lee Turnbull, Lars Engebretsen, Robert F LaPrade
BACKGROUND: Knee dislocations often require multiple concurrent ligament reconstructions, which involve creating several tunnels in the distal femur. Therefore, the risk of tunnel convergence is increased because of the limited bone volume within the distal aspect of the femur. PURPOSE: To assess the risk of tunnel convergence and determine the optimal reconstruction tunnel orientations for multiple ligament reconstructions in the femur. STUDY DESIGN: Descriptive laboratory study...
November 21, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27872003/primary-and-secondary-provoked-vestibulodynia-a-review-of-overlapping-and-distinct-factors
#19
REVIEW
Caroline F Pukall
INTRODUCTION: A common subtype of vulvodynia is provoked vestibulodynia (PVD), characterized by severe pain upon contact to the vaginal entrance. Some researchers have further delineated the PVD group based on pain onset (primary vs secondary PVD, referred to as PVD1 and PVD2, respectively). AIM: This study aims to review available evidence regarding sociodemographic variables, pain characteristics, medical history and examination findings, quantitative sensory testing, genetic markers, psychosocial/sexual/relationship function, treatment outcome, and brain imaging in women with PVD1 and PVD2...
January 2016: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/27870505/distinguishing-medication-free-subjects-with-unipolar-disorder-from-subjects-with-bipolar-disorder-state-matters
#20
Maria M Rive, Ronny Redlich, Lianne Schmaal, André F Marquand, Udo Dannlowski, Dominik Grotegerd, Dick J Veltman, Aart H Schene, Henricus G Ruhé
OBJECTIVES: Recent studies have indicated that pattern recognition techniques of functional magnetic resonance imaging (fMRI) data for individual classification may be valuable for distinguishing between major depressive disorder (MDD) and bipolar disorder (BD). Importantly, medication may have affected previous classification results as subjects with MDD and BD use different classes of medication. Furthermore, almost all studies have investigated only depressed subjects. Therefore, we focused on medication-free subjects...
November 2016: Bipolar Disorders
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