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BMC Medical Imaging

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/27552827/multimodal-mri-for-early-diabetic-mild-cognitive-impairment-study-protocol-of-a-prospective-diagnostic-trial
#13
Ying Yu, Qian Sun, Lin-Feng Yan, Yu-Chuan Hu, Hai-Yan Nan, Yang Yang, Zhi-Cheng Liu, Wen Wang, Guang-Bin Cui
BACKGROUND: Type 2 diabetes mellitus (T2DM) is a risk factor for dementia. Mild cognitive impairment (MCI), an intermediary state between normal cognition and dementia, often occurs during the prodromal diabetic stage, making early diagnosis and intervention of MCI very important. Latest neuroimaging techniques revealed some underlying microstructure alterations for diabetic MCI, from certain aspects. But there still lacks an integrated multimodal MRI system to detect early neuroimaging changes in diabetic MCI patients...
August 24, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27501792/counter-clockwise-vortical-blood-flow-in-the-main-pulmonary-artery-in-a-patient-with-patent-ductus-arteriosus-with-pulmonary-arterial-hypertension-a-cardiac-magnetic-resonance-imaging-case-report
#14
Gert Reiter, Ursula Reiter, Gabor Kovacs, Gabriel Adelsmayr, Andreas Greiser, Aurelien F Stalder, Horst Olschewski, Michael Fuchsjäger
BACKGROUND: In patients with pulmonary hypertension (PH), duration of vortical blood flow along the main pulmonary artery enables estimation of the mean pulmonary arterial pressure (mPAP) non-invasively. It remains to date not known, if this method is applicable in patients with pulmonary arterial hypertension (PAH) and abnormal aortic-to-pulmonary shunting. CASE PRESENTATION: The present case analyzes the effect of a patent ductus arteriosus (PDA) on pulmonary artery flow patterns in PAH (mPAP from right heart catheterization, 75 mmHg)...
August 8, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27421763/evaluation-of-dynamic-infrared-thermography-as-an-alternative-to-ct-angiography-for-perforator-mapping-in-breast-reconstruction-a-clinical-study
#15
Sven Weum, James B Mercer, Louis de Weerd
BACKGROUND: The current gold standard for preoperative perforator mapping in breast reconstruction with a DIEP flap is CT angiography (CTA). Dynamic infrared thermography (DIRT) is an imaging method that does not require ionizing radiation or contrast injection. We evaluated if DIRT could be an alternative to CTA in perforator mapping. METHODS: Twenty-five patients scheduled for secondary breast reconstruction with a DIEP flap were included. Preoperatively, the lower abdomen was examined with hand-held Doppler, DIRT and CTA...
July 15, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27245048/a-statistical-shape-modelling-framework-to-extract-3d-shape-biomarkers-from-medical-imaging-data-assessing-arch-morphology-of-repaired-coarctation-of-the-aorta
#16
Jan L Bruse, Kristin McLeod, Giovanni Biglino, Hopewell N Ntsinjana, Claudio Capelli, Tain-Yen Hsia, Maxime Sermesant, Xavier Pennec, Andrew M Taylor, Silvia Schievano
BACKGROUND: Medical image analysis in clinical practice is commonly carried out on 2D image data, without fully exploiting the detailed 3D anatomical information that is provided by modern non-invasive medical imaging techniques. In this paper, a statistical shape analysis method is presented, which enables the extraction of 3D anatomical shape features from cardiovascular magnetic resonance (CMR) image data, with no need for manual landmarking. The method was applied to repaired aortic coarctation arches that present complex shapes, with the aim of capturing shape features as biomarkers of potential functional relevance...
May 31, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27129879/current-t%C3%A2-and-t%C3%A2-mapping-techniques-applied-with-simple-thresholds-cannot-discriminate-acute-from-chronic-myocadial-infarction-on-an-individual-patient-basis-a-pilot-study
#17
Florian von Knobelsdorff-Brenkenhoff, Marcel Prothmann, Matthias A Dieringer, Ralf Wassmuth, André Rudolph, Wolfgang Utz, Julius Traber, Andreas Greiser, Thoralf Niendorf, Jeanette Schulz-Menger
BACKGROUND: Studying T1- and T2-mapping for discrimination of acute from chronic myocardial infarction (AMI, CMI). METHODS: Eight patients with AMI underwent CMR at 3 T acutely and after >3 months. Imaging techniques included: T2-weighted imaging, late enhancement (LGE), T2-mapping, native and post-contrast T1-mapping. Myocardial T2- and T1-relaxation times were determined for every voxel. Abnormal voxels as defined by having T2- and T1-values beyond a predefined threshold (T2 > 50 ms, native T1 > 1250 ms and post-contrast T1 < 350 ms) were highlighted and compared with LGE as the reference...
April 29, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27053063/clinical-value-of-endoluminal-ultrasonography-in-the-diagnosis-of-rectovaginal-fistula
#18
Hao-Qiang Yin, Chen Wang, Xin Peng, Fang Xu, Ya-Juan Ren, Yong-Qing Chao, Jin-Gen Lu, Song Wang, Hu-Sheng Xiao
BACKGROUND: Rectovaginal fistula (RVF) refers to a pathological passage between the rectum and vagina, which is a public health challenge. This study was aimed to explore the clinical value of endoluminal biplane ultrasonography in the diagnosis of rectovaginal fistula (RVF). METHODS: Thirty inpatients and outpatients with suspected RVF from January 2006 to June 2013 were included in the study, among whom 28 underwent surgical repair. All 28 patients underwent preoperative endoluminal ultrasonography, and the obtained diagnostic results were compared with the corresponding surgical results...
April 6, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27044420/pelvic-retroperitoneal-pleomorphic-hyalinizing-angiectatic-tumor-phat-of-soft-tissue-a-case-report
#19
Zhi-gang Chu, Meng-qi Liu, Zhi-yu Zhu, Fa-jin Lv, Yu Ouyang
BACKGROUND: Pleomorphic hyalinizing angiectatic tumor (PHAT) is a rare soft tissue tumor of low malignant potential, which most often arises in the lower extremities. Lesions occurred in other anatomic locations have been rarely reported. Moreover, their imaging features have not been well discussed. Here we report a case of PHAT arising primarily in the pelvic retroperitoneum. To our knowledge, this is the first radiological description for retroperitoneum PHAT. CASE PRESENTATION: A 26-year-old female was referred to our hospital for evaluation of a pelvic mass incidentally noted in routine pre-pregnancy ultrasonography examination...
April 5, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27025987/the-correlation-between-radiographic-and-pathologic-grading-of-lumbar-facet-joint-degeneration
#20
COMPARATIVE STUDY
Xin Zhou, Yuan Liu, Song Zhou, Xiao-Xing Fu, Xiao-Long Yu, Chang-Lin Fu, Bin Zhang, Min Dai
BACKGROUND: Before performing spine non-fusion surgery that retains the facet joints, choosing an accurate radiographic method to evaluate the degree of facet joint degeneration is extremely important. Therefore, the objective of this study was to determine the accuracy and reliability of different radiographic classifications by analyzing the correlation between radiographic and pathologic grading of lumbar facet joint degeneration. Taking the pathologic examination as standard, the consistency of computed tomography (CT) and magnetic resonance imaging (MRI) assessment of lumbar facet joint degeneration was compared...
March 29, 2016: BMC Medical Imaging
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