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BMC Medical Imaging

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https://www.readbyqxmd.com/read/28103839/computed-tomography-and-magnetic-resonance-imaging-of-a-plexiform-angiomyxoid-myofibroblastic-tumor-a-case-report
#1
Hiroyuki Akai, Shigeru Kiryu, Masaru Shinozaki, Yasunori Ohta, Yoshiyasu Nakano, Koichiro Yasaka, Kuni Ohtomo
BACKGROUND: Plexiform angiomyxoid myofibroblastic tumor (PAMT) is a very rare mesenchymal tumor of the stomach. Here we report a case of pathologically confirmed PAMT with an unique cyst formation. CASE PRESENTATION: A 55-year-old male with a 10-year history of a gastric subepithelial tumor underwent computed tomography (CT) and magnetic resonance imaging (MRI). Two cysts were observed in the tumor, and the cyst wall showed moderately high intensity on T2-weighted images compared with the gastric wall...
January 19, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28095792/multi-contrast-brain-magnetic-resonance-image-super-resolution-using-the-local-weight-similarity
#2
Hong Zheng, Xiaobo Qu, Zhengjian Bai, Yunsong Liu, Di Guo, Jiyang Dong, Xi Peng, Zhong Chen
BACKGROUND: Low-resolution images may be acquired in magnetic resonance imaging (MRI) due to limited data acquisition time or other physical constraints, and their resolutions can be improved with super-resolution methods. Since MRI can offer images of an object with different contrasts, e.g., T1-weighted or T2-weighted, the shared information between inter-contrast images can be used to benefit super-resolution. METHODS: In this study, an MRI image super-resolution approach to enhance in-plane resolution is proposed by exploring the statistical information estimated from another contrast MRI image that shares similar anatomical structures...
January 17, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28068946/ct-characteristics-of-non-small-cell-lung-cancer-with-epidermal-growth-factor-receptor-mutation-a-systematic-review-and-meta-analysis
#3
Zenghui Cheng, Fei Shan, Yuesong Yang, Yuxin Shi, Zhiyong Zhang
BACKGROUND: To systematically investigate the relationship between CT morphological features and the presence of epidermal growth factor receptor (EGFR) mutations in non-small cell lung cancer (NSCLC). METHODS: All studies about the CT morphological features of NSCLC with EGFR mutations published between January 1, 2000 and March 15, 2015 were searched in the PubMed and EMBASE databases. Qualified studies were selected according to inclusion criteria. The frequency of EGFR mutations and CT features of ground-glass opacity (GGO) content, tumor size, cavitation, air-bronchogram, lobulation, and spiculation were extracted...
January 10, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28068928/newly-recognized-cerebral-infarctions-on-postmortem-imaging-a-report-of-three-cases-with-systemic-infectious-disease
#4
Sakon Noriki, Kazuyuki Kinoshita, Kunihiro Inai, Toyohiko Sakai, Hirohiko Kimura, Takahiro Yamauchi, Masayuki Iwano, Hironobu Naiki
BACKGROUND: Postmortem imaging (PMI) refers to the imaging of cadavers by computed tomography (CT) and/or magnetic resonance imaging (MRI). Three cases of cerebral infarctions that were not found during life but were newly recognized on PMI and were associated with severe systemic infections are presented. CASE PRESENTATIONS: An 81-year-old woman with a pacemaker and slightly impaired liver function presented with fever. Imaging suggested interstitial pneumonia and an iliopsoas abscess, and blood tests showed liver dysfunction and disseminated intravascular coagulation (DIC)...
January 10, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28061823/a-case-report-in-cardiovascular-magnetic-resonance-the-contrast-agent-matters-in-amyloid
#5
Marianna Fontana, Thomas A Treibel, Ana Martinez-Naharro, Stefania Rosmini, Raymond Y Kwong, Julian D Gillmore, Philip N Hawkins, James C Moon
BACKGROUND: Cardiac amyloidosis is a progressive but underdiagnosed and underappreciated cause of heart failure. In the last few years, cardiovascular magnetic resonance (CMR) has become the gold standard for non invasive diagnosis of cardiac amyloidosis with the characteristic subendocardial late gadolinium enhancement. CASE PRESENTATION: We describe a case of a patient who, in the process of aligning protocols for a trial between different centers, had a paired study with two different contrast agents, Dotarem® and MultiHance®...
January 7, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28056889/dimensionality-reduction-based-fusion-approaches-for-imaging-and-non-imaging-biomedical-data-concepts-workflow-and-use-cases
#6
Satish E Viswanath, Pallavi Tiwari, George Lee, Anant Madabhushi
BACKGROUND: With a wide array of multi-modal, multi-protocol, and multi-scale biomedical data being routinely acquired for disease characterization, there is a pressing need for quantitative tools to combine these varied channels of information. The goal of these integrated predictors is to combine these varied sources of information, while improving on the predictive ability of any individual modality. A number of application-specific data fusion methods have been previously proposed in the literature which have attempted to reconcile the differences in dimensionalities and length scales across different modalities...
January 5, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28056868/fdg-pet-using-suvmax-for-preoperative-t-staging-of-esophageal-squamous-cell-carcinoma-with-and-without-neoadjuvant-chemoradiotherapy
#7
Yung-Cheng Huang, Hung-I Lu, Shun-Chen Huang, Chien-Chin Hsu, Nan-Tsing Chiu, Yu-Ming Wang, Yi-Chun Chiu, Shau-Hsuan Li
BACKGROUND: Accurate T-staging is pivotal for predicting prognosis and selecting appropriate therapies for esophageal squamous cell carcinoma (ESCC). The diagnostic performance of fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) for its T-staging is uncertain. We investigated use of FDG PET/CT for preoperative T-staging of patients with ESCC. METHODS: Patients with ESCC given preoperative FDG PET/CT scans, either with (CRT([+]) group) or without (CRT([-]) group) neoadjuvant chemoradiotherapy, were retrospectively reviewed...
January 5, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/27998291/skeleton-based-cerebrovascular-quantitative-analysis
#8
Xingce Wang, Enhui Liu, Zhongke Wu, Feifei Zhai, Yi-Cheng Zhu, Wuyang Shui, Mingquan Zhou
BACKGROUND: Cerebrovascular disease is the most common cause of death worldwide, with millions of deaths annually. Interest is increasing toward understanding the geometric factors that influence cerebrovascular diseases, such as stroke. Cerebrovascular shape analyses are essential for the diagnosis and pathological identification of these conditions. The current study aimed to provide a stable and consistent methodology for quantitative Circle of Willis (CoW) analysis and to identify geometric changes in this structure...
December 20, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27923351/intra-and-inter-observer-reliability-of-a-new-standardized-diagnostic-method-using-spect-ct-in-patients-with-osteochondral-lesions-of-the-ankle-joint
#9
Geneviève Hassink, Enrique A Testa, André Leumann, Thomas Hügle, Helmut Rasch, Michael T Hirschmann
BACKGROUND: Single Photon Emission Computed Tomography-Computed Tomography (SPECT/CT) gains an important part of diagnostics in patients with osteochondral lesions (OCL). SPECT/CT is a hybrid imaging modality, which combines a 3D scintigraphy (SPECT) and computerized tomography (CT) into one single procedure and combines metabolic data, structural and mechanical information. The purpose of the study was to develop and evaluate a standardized method to anatomically localize and quantitatively analyze the bone SPECT tracer activity of the ankle joint using SPECT/CT...
December 7, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27908285/prevalence-and-location-of-the-secondary-mesiobuccal-canal-in-1-100-maxillary-molars-using-cone-beam-computed-tomography
#10
Pablo Betancourt, Pablo Navarro, Gonzalo Muñoz, Ramón Fuentes
BACKGROUND: Several articles have used cone beam computed tomography (CBCT) to study the morphology of the maxillary molars and to ascertain its ability to visualize the second mesiobuccal canal (MB2); however, its geometric location has not been examined in depth. The aim of this study was to describe in vivo the prevalence and location of the MB2 in the mesiobuccal root of the first maxillary molar (1MM) and the second maxillary molar (2MM) through CBCT imaging. METHODS: Five hundred fifty CBCT images of the 1MM and 550 of the 2MM were analyzed...
December 1, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27884115/chemical-shift-mr-imaging-in-the-lumbar-vertebra-the-effect-of-field-strength-scanner-vendors-and-flip-angles-in-repeatability-of-signal-intensity-index-measurement
#11
Zebin Xiao, Jian Li, Chengqi Li, Yuyang Zhang, Dejun She, Dairong Cao
BACKGROUND: To evaluate the reproducibility of signal intensity index (SII) measurements with MRI systems from different vendors and with different field strengths, and to test the effectiveness of flip angle. METHODS: Thirty-two healthy volunteers (mean age 35.3 ± 9.3 years) were enrolled in this ethics committee-approved study. Chemical shift MR imaging was performed on 1.5- and 3.0-T MR systems from three vendors. Two independent observers measured SII values in five lumbar segments...
November 25, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27871242/comparison-of-coronary-arterial-lumen-dimensions-on-angiography-and-plaque-characteristics-on-optical-coherence-tomography-images-and-their-changes-induced-by-statin
#12
Nana Dong, Zulong Xie, Wei Wang, Jiannan Dai, Meng Sun, Zhongyue Pu, Jinwei Tian, Bo Yu
BACKGROUND: Coronary angiography (CAG) is widely used to assess lumen dimensions, and optical coherence tomography (OCT) is used to evaluate the characteristics of atherosclerotic plaque. This study was aimed to compare coronary lumen dimensions using CAG and plaque characteristics using OCT and their changes during statin therapy. METHODS: We identified 97 lipid-rich plaques from 69 statin-naïve patients, who received statin therapy in the following 12 months...
November 22, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27835984/qualitative-analysis-of-small-%C3%A2-2%C3%A2-cm-regenerative-nodules-dysplastic-nodules-and-well-differentiated-hccs-with-gadoxetic-acid-mri
#13
Michele Di Martino, Michele Anzidei, Fulvio Zaccagna, Luca Saba, Sandro Bosco, Massimo Rossi, Stefano Ginanni Corradini, Carlo Catalano
BACKGROUND: The characterization of small lesions in cirrhotic patients is extremely difficult due to the overlap of imaging features among different entities in the step-way of the hepatocarcinogenesis. The aim of our study was to evaluate the role of gadoxetic-acid MRI in the differentiation of small (≤2 cm) well-differentiated hepatocellular carcinomas from regenerative and dysplastic nodules. METHODS: Seventy-three cirrhotic patients, with 118 focal liver lesions (≤2 cm) were prospectively recruited...
November 11, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27809859/variation-in-type-and-frequency-of-diagnostic-imaging-during-trauma-care-across-multiple-time-points-by-patient-insurance-type
#14
Nathaniel Bell, Laura Repáraz, William R Fry, R Stephen Smith, Alejandro Luis
BACKGROUND: Research has shown that uninsured patients receive fewer radiographic studies during trauma care, but less is known as to whether differences in care are present among other insurance groups or across different time points during hospitalization. Our objective was to examine the number of radiographic studies administered to a cohort of trauma patients over the entire hospital stay as well as during the first 24-hours of care. METHODS: Patient data were obtained from an American College of Surgeons (ACS) verified Level I Trauma Center between January 1, 2011 and December 31, 2012...
November 3, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27784288/kinematic-analysis-of-diastolic-function-using-the-freely-available-software-echo-e-waves-feasibility-and-reproducibility
#15
Martin G Sundqvist, Katrin Salman, Per Tornvall, Martin Ugander
BACKGROUND: Early diastolic left ventricular (LV) filling can be accurately described using the same methods used in classical mechanics to describe the motion of a loaded spring as it recoils, a validated method also referred to as the Parameterized Diastolic Filling (PDF) formalism. With this method, each E-wave recorded by pulsed wave (PW) Doppler can be mathematically described in terms of three constants: LV stiffness (k), viscoelasticity (c), and load (x 0). Also, additional parameters of physiological and diagnostic interest can be derived...
October 27, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27784268/characterization-of-ten-white-matter-tracts-in-a-representative-sample-of-cuban-population
#16
D Góngora, M Domínguez, M A Bobes
BACKGROUND: The diffusion tensor imaging technique (DTI) combined with tractography methods, has achieved the tridimensional reconstruction of white matter tracts in the brain. It allows their characterization in vivo in a non-invasive way. However, one of the largest sources of variability originates from the location of regions of interest, is therefore necessary schemes which make it possible to establish a protocol to be insensitive to variations in drawing thereof. The purpose of this paper is to stablish a reliable protocol to reconstruct ten prominent tracts of white matter and characterize them according to volume, fractional anisotropy and mean diffusivity...
October 26, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27756255/-18-f-fdg-uptake-in-the-stomach-on-screening-pet-ct-value-for-predicting-helicobacter-pylori-infection-and-chronic-atrophic-gastritis
#17
Shigeki Kobayashi, Mayumi Ogura, Naohisa Suzawa, Noriyuki Horiki, Masaki Katsurahara, Toru Ogura, Hajime Sakuma
BACKGROUND: The aim of this study was to determine the value of (18)F-FDG uptake on screening PET/CT images for the prediction of Helicobacter pylori (H. pylori) infection and chronic atrophic gastritis. METHODS: Among subjects who underwent (18)F-FDG PET/CT for cancer screening from April 2005 to November 2015, PET/CT images were analyzed in 88 subjects who had gastrointestinal fiberscopy within 6 months. The volumes of interest (VOIs) were placed in the fornix, corpus and antrum of the stomach to determine maximal standardized uptake value (SUVmax) and mean SUV (SUVmean)...
October 18, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27724884/mapping-breast-tissue-types-by-miniature-radio-frequency-near-field-spectroscopy-sensor-in-ex-vivo-freshly-excised-specimens
#18
Zvi Kaufman, Haim Paran, Ilana Haas, Patricia Malinger, Tania Zehavi, Tamar Karni, Izhak Pappo, Judith Sandbank, Judith Diment, Tanir Allweis
BACKGROUND: Receiving real-time information on tissue properties while performing biopsy procedures has the potential of improving biopsy accuracy. The study goal was to test the ability of a miniature flexible Radio-Frequency (RF) sensor (Dune Medical Devices), designed to be mounted on the surface of surgical tools, in measuring and mapping the various breast tissue types and abnormalities in terms of electrical properties. METHODS: Between January and October 2012, 102 patients undergoing lumpectomy, open-biopsy or mastectomy, in 3 medical centers, were enrolled in this study...
October 10, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27716096/the-effect-of-intramuscular-interferon-beta-1a-on-spinal-cord-volume-in-relapsing-remitting-multiple-sclerosis
#19
Sheena L Dupuy, Fariha Khalid, Brian C Healy, Sonya Bakshi, Mohit Neema, Shahamat Tauhid, Rohit Bakshi
BACKGROUND: Spinal cord atrophy occurs early in multiple sclerosis (MS) and impacts disability. The therapeutic effect of interferon beta-1a (IFNβ-1a) on spinal cord atrophy in patients with relapsing-remitting (RR) MS has not been explored. METHODS: We retrospectively identified 16 consecutive patients receiving weekly intramuscular IFNβ-1a for 2 years [baseline age (mean ± SD) 47.7 ± 7.5 years, Expanded Disability Status Scale score median (range) 1...
October 5, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27716092/a-deformable-template-method-for-describing-and-averaging-the-anatomical-variation-of-the-human-nasal-cavity
#20
Alireza Nejati, Natalia Kabaliuk, Mark C Jermy, John E Cater
BACKGROUND: Understanding airflow through human airways is of importance in drug delivery and development of assisted breathing methods. In this work, we focus on development of a new method to obtain an averaged upper airway geometry from computed tomography (CT) scans of many individuals. This geometry can be used for air flow simulation. We examine the geometry resulting from a data set consisting of 26 airway scans. The methods used to achieve this include nasal cavity segmentation and a deformable template matching procedure...
October 1, 2016: BMC Medical Imaging
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