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BMC Medical Imaging

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https://www.readbyqxmd.com/read/29284450/cardiovascular-magnetic-resonance-in-the-evaluation-of-heart-valve-disease
#1
REVIEW
G S Gulsin, A Singh, G P McCann
BACKGROUND: Over the last 25 years, cardiovascular magnetic resonance imaging (CMR) has emerged as an alternative to echocardiography for assessment of valvular heart disease (VHD). Although echo remains the first-line imaging modality for the assessment of patients with VHD, CMR can now provide a comprehensive assessment in many instances. Using a combination of techniques, CMR provides information on valve anatomy and enables quantitative analysis of the severity of the valve lesion...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29284426/the-morphology-of-maxillary-first-and-second-molars-analyzed-by-cone-beam-computed-tomography-in-a-polish-population
#2
Katarzyna Olczak, Halina Pawlicka
BACKGROUND: The success of endodontic treatment is greatly affected by the location of the root canals. The purpose of this study was to evaluate the root and canal morphology of permanent maxillary first and second molars in a Polish population using cone-beam computed tomography scanning. METHODS: Cone-beam computed tomography (CBCT) scans of maxillary first and second molars the maxilla were examined. The number of roots and root canals, and the frequency of additional canals (MB2) in the mesiobuccal root canals were determined...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29284425/mri-texture-analysis-in-differentiating-luminal-a-and-luminal-b-breast-cancer-molecular-subtypes-a-feasibility-study
#3
Kirsi Holli-Helenius, Annukka Salminen, Irina Rinta-Kiikka, Ilkka Koskivuo, Nina Brück, Pia Boström, Riitta Parkkola
BACKGROUND: The aim of this study was to use texture analysis (TA) of breast magnetic resonance (MR) images to assist in differentiating estrogen receptor (ER) positive breast cancer molecular subtypes. METHODS: Twenty-seven patients with histopathologically proven invasive ductal breast cancer were selected in preliminary study. Tumors were classified into molecular subtypes: luminal A (ER-positive and/or progesterone receptor (PR)-positive, human epidermal growth factor receptor type 2 (HER2) -negative, proliferation marker Ki-67 < 20 and low grade (I)) and luminal B (ER-positive and/or PR-positive, HER2-positive or HER2-negative with high Ki-67 ≥ 20 and higher grade (II or III))...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29281996/the-diagnostic-performance-of-18f-famt-pet-and-18f-fdg-pet-for-malignancy-detection-a-meta-analysis
#4
Arifudin Achmad, Anu Bhattarai, Ryan Yudistiro, Yusri Dwi Heryanto, Tetsuya Higuchi, Yoshito Tsushima
No abstract text is available yet for this article.
December 28, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29281991/superb-microvascular-imaging-smi-compared-with-conventional-ultrasound-for-evaluating-thyroid-nodules
#5
Ruigang Lu, Yuxin Meng, Yan Zhang, Wei Zhao, Xun Wang, Mulan Jin, Ruijun Guo
BACKGROUND: Superb microvascular imaging (SMI) for depiction of microvascular flow in thyroid nodules was compared with color/power Doppler imaging (CDI/PDI) and contrast-enhanced ultrasonography (CEUS). In addition, the diagnostic performance of conventional ultrasound combined with SMI for differentiating benign and malignant thyroid nodules was evaluated. METHODS: Preoperative conventional ultrasound consisting of gray-scale ultrasonography and CDI/PDI, followed by SMI and CEUS, was used to record 52 thyroid nodules...
December 28, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29268710/follow-up-of-iatrogenic-aorto-coronary-dunning-dissections-by-cardiac-computed-tomography-imaging
#6
Stefan Baumann, Michael Behnes, Benjamin Sartorius, Tobias Becher, Ibrahim El-Battrawy, Christian Fastner, Uzair Ansari, Dirk Loßnitzer, Kambis Mashayekhi, Thomas Henzler, Stefan O Schoenberg, Martin Borggrefe, Ibrahim Akin
BACKGROUND: Iatrogenic aorto-coronary dissections following percutaneous coronary interventions (PCI) represent a rare but potentially life threatening complication. This restrospective and observational study aims to describe our in-house experience for timely diagnostics and therapy including cardiovascular imaging to follow-up securely high-risk patients with Dunning dissections. METHODS: Dunning dissections (DD) occurred during clinical routine PCIs, which were indicated according to current ESC guidelines...
December 21, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29262792/ultra-high-b-value-diffusion-weighted-imaging-features-of-the-prostatic-leiomyoma-case-report
#7
Yanguang Shen, Yan Zhong, Haiyi Wang, Lu Ma, Yingwei Wang, Jinjin Pan, Zhonghua Sun, Huiyi Ye
BACKGROUND: Leiomyoma of the prostate is a rare benign tumor arising from smooth muscle fibers. Most cases are incidental findings observed during pathological examinations after resection of the prostate. To the best of our knowledge, only few studies have reported the conventional magnetic resonance imaging (MRI) findings of such tumors; however, no reports have described the ultra-high b-value diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) findings of prostatic leiomyomas...
December 20, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29258458/improving-the-evaluation-of-cardiac-function-in-rats-at-7t-with-denoising-filters-a-comparison-study
#8
Benoit Tricot, Maxime Descoteaux, Matthieu Dumont, Frederic Chagnon, Luc Tremblay, André Carpentier, Olivier Lesur, Martin Lepage, Alain Lalande
BACKGROUND: We investigate the use of different denoising filters on low signal-to-noise ratio cardiac images of the rat heart acquired with a birdcage volume coil at 7T. Accuracy and variability of cardiac function parameters were measured from manual segmentation of rat heart images with and without filtering. METHODS: Ten rats were studied using a 7T Varian system. End-diastolic and end-systolic volumes, ejection fraction and left ventricle mass (LVM) were calculated from manual segmentation by two experts on cine-FLASH short-axis slices covering the left ventricle...
December 19, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29237404/computed-tomography-scan-based-prediction-of-the-vulnerable-carotid-plaque
#9
Hadi Mahmoud Haider Diab, Lars Melholt Rasmussen, Stevo Duvnjak, Axel Diederichsen, Pia Søndergaard Jensen, Jes Sanddal Lindholt
BACKGROUND: Primary to validate a commercial semi-automated computed tomography angiography (CTA) -software for vulnerable plaque detection compared to histology of carotid endarterectomy (CEA) specimens and secondary validating calcifications scores by in vivo CTA with ex vivo non-contrast enhanced computed tomography (NCCT). METHODS: From January 2014 to October 2016 53 patients were included retrospectively, using a cross-sectional design. All patients underwent both CTA and CEA...
December 13, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29233127/lesion-based-diagnostic-performance-of-dual-phase-99mtc-mibi-spect-ct-imaging-and-ultrasonography-in-patients-with-secondary-hyperparathyroidism
#10
Panli Li, Qiufang Liu, Daoqiang Tang, Yinyan Zhu, Lian Xu, Xiaoguang Sun, Shaoli Song
BACKGROUND: We aimed to evaluate the diagnostic performance of 99mTc-MIBI SPECT/CT and ultrasonography in patients with secondary hyperparathyroidism (SHPT), and explored the factors that affect the diagnostic performance. METHODS: 99mTc-MIBI SPECT/CT and ultrasonography were performed in 50 patients with SHPT within 1 month before they underwent surgery. Imaging results were confirmed by the pathology. Pearson correlation analysis was used to determine the correlation of PTH level with clinical data...
December 12, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29228921/testing-of-the-assisting-software-for-radiologists-analysing-head-ct-images-lessons-learned
#11
Petr Martynov, Nikolai Mitropolskii, Katri Kukkola, Monika Gretsch, Vesa-Matti Koivisto, Ilkka Lindgren, Jani Saunavaara, Jarmo Reponen, Anssi Mäkynen
BACKGROUND: Assessing a plan for user testing and evaluation of the assisting software developed for radiologists. METHODS: Test plan was assessed in experimental testing, where users performed reporting on head computed tomography studies with the aid of the software developed. The user testing included usability tests, questionnaires, and interviews. In addition, search relevance was assessed on the basis of user opinions. RESULTS: The testing demonstrated weaknesses in the initial plan and enabled improvements...
December 11, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29197346/radiographic-features-of-ollier-s-disease-two-case-reports
#12
Jamshid Sadiqi, Najibullah Rasouly, Hidayatullah Hamidi, Salahuddin Siraj
BACKGROUND: Ollier's disease is a non-hereditary, benign bone tumor which is usually characterized by presence of multiple radiolucent lesions (enchondromas) in the metaphysis of long bones with unilateral predominance. The disease is a rare clinical entity with 1/100000 occurrence in early childhood. Patients mostly present with multiple hard swellings and deformity of the tubular bones specially hands and feet with leg discrepancy and pathologic fractures. CASE PRESENTATION: We present two cases of Ollier's disease in a 13 years old female and 8 years old boy which had no specific symptoms...
December 2, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29179695/nonlocal-total-variation-based-on-symmetric-kullback-leibler-divergence-for-the-ultrasound-image-despeckling
#13
Shujun Liang, Feng Yang, Tiexiang Wen, Zhewei Yao, Qinghua Huang, Chengke Ye
BACKGROUND: Ultrasound imaging is safer than other imaging modalities, because it is noninvasive and nonradiative. Speckle noise degrades the quality of ultrasound images and has negative effects on visual perception and diagnostic operations. METHODS: In this paper, a nonlocal total variation (NLTV) method for ultrasonic speckle reduction is proposed. A spatiogram similarity measurement is introduced for the similarity calculation between image patches. It is based on symmetric Kullback-Leibler (KL) divergence and signal-dependent speckle model for log-compressed ultrasound images...
November 28, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29166871/contribution-of-diffusion-weighted-imaging-to-conventional-mri-for-detection-of-haemorrhagic-infarction-in-ovary-torsion
#14
Oğuzhan Özdemir, Yavuz Metin, Nurgül Orhan Metin, Ali Küpeli
BACKGROUND: To assess the role of DWI in differentiation haemorrhagic ovary infarction from non-haemorrhagic one. METHODS: For this prospectively designed study, of 117 female patients who presented with acute lower quadrant pain and underwent MRI for suspicion of ovary torsion, results of only 29 patients (mean age, 24.7; SD, ±5.7; age range, 18-37), with surgical and pathological confirmation of adnexal torsion, were included to the study. All patients underwent DWI after conventional MRI...
November 22, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28927390/computer-aided-evaluation-of-inflammatory-changes-over-time-on-mri-of-the-spine-in-patients-with-suspected-axial-spondyloarthritis-a-feasibility-study
#15
Evgeni Aizenberg, Rosaline van den Berg, Zineb Ez-Zaitouni, Désirée van der Heijde, Monique Reijnierse, Oleh Dzyubachyk, Boudewijn P F Lelieveldt
BACKGROUND: Evaluating inflammatory changes over time on MR images of the spine in patients with suspected axial Spondyloarthritis (axSpA) can be a labor-intensive task, requiring readers to manually search for and perceptually align a set of vertebrae between two scans. The purpose of this study was to assess the feasibility of computer-aided (CA) evaluation of such inflammatory changes in a framework where scans from two time points are fused into a single color-encoded image integrated into an interactive scoring tool...
September 19, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28899347/case-report-of-hyperglycemic-nonketotic-chorea-with-rapid-radiological-resolution
#16
H M M T B Herath, S P Pahalagamage, Sunethra Senanayake
BACKGROUND: Hemichorea is a rare manifestation of nonketotic hyperglycemia that usually affects elderly Asian women with poor glycemic control. Non-contrast computerized Tomography and T1- weighted Magnetic Resonance Imaging shows characteristic hyperintense basal ganglia lesions. CASE PRESENTATION: A Fifty-seven year old Sri Lankan female presented with a two-day history of right upper limb chorea. She had been diagnosed with diabetes mellitus one year ago, but was not on any treatment and did not have any micro vascular or macro vascular complications...
September 12, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28870147/electronic-cleansing-in-computed-tomography-colonography-using-at-layer-identification-with-integration-of-gradient-directional-second-derivative-and-material-fraction-model
#17
Krisorn Chunhapongpipat, Ratinan Boonklurb, Bundit Chaopathomkul, Sirod Sirisup, Rajalida Lipikorn
BACKGROUND: In computed tomography colonography images, electronic cleansing (EC) is applied to remove opacified residual materials, called fecal-tagging materials (FTM), using positive-contrast tagging agents and laxative to facilitate polyp detection. METHODS: The proposed EC, EC prop , integrates the gradient directional second derivative into material fraction model to preserve submerged soft tissue (ST) under FTM. Three-material fraction model is used to remove FTM and artifacts at air-tagging (AT) layers and T-junctions where air, ST, and FTM material meet simultaneously...
September 4, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28859628/assessment-of-thoracic-ultrasound-in-complementary-diagnosis-and-in-follow-up-of-community-acquired-pneumonia-cap
#18
Maria D'Amato, Gaetano Rea, Vincenzo Carnevale, Maria Arcangela Grimaldi, Anna Rita Saponara, Eric Rosenthal, Michele Maria Maggi, Lucia Dimitri, Marco Sperandeo
BACKGROUND: Chest X-ray (CXR) is the primary diagnostic tool for community-acquired pneumonia (CAP). Some authors recently proposed that thoracic ultrasound (TUS) could valuably flank or even reliably substitute CXR in the diagnosis and follow-up of CAP. We investigated the clinical utility of TUS in a large sample of patients with CAP, to challenge the hypothesis that it may be a substitute for CXR. METHODS: Out of 645 consecutive patients with a CXR-confirmed CAP diagnosed in the emergency room of our hospital over a three-years period, 510 were subsequently admitted to our department of Internal Medicine...
August 31, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28835220/cardiovascular-magnetic-resonance-feature-tracking-in-small-animals-a-preliminary-study-on-reproducibility-and-sample-size-calculation
#19
Tomas Lapinskas, Jana Grune, Seyedeh Mahsa Zamani, Sarah Jeuthe, Daniel Messroghli, Rolf Gebker, Heike Meyborg, Ulrich Kintscher, Remigijus Zaliunas, Burkert Pieske, Philipp Stawowy, Sebastian Kelle
BACKGROUND: Cardiovascular magnetic resonance feature tracking (CMR-FT) is a novel tissue tracking technique developed for noninvasive assessment of myocardial motion and deformation. This preliminary study aimed to evaluate the observer's reproducibility of CMR-FT in a small animal (mouse) model and define sample size calculation for future trials. METHODS: Six C57BL/6 J mice were selected from the ongoing experimental mouse model onsite and underwent CMR with a 3 Tesla small animal MRI scanner...
August 23, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28830463/diffusion-tensor-mr-imaging-characteristics-of-cerebral-white-matter-development-in-fetal-pigs
#20
Wenxu Qi, Song Gao, Caixia Liu, Gongyu Lan, Xue Yang, Qiyong Guo
BACKGROUND: The purpose of this study was to investigate the anisotropic features of fetal pig cerebral white matter (WM) development by magnetic resonance diffusion tensor imaging, and to evaluate the developmental status of cerebral WM in different anatomical sites at different times. METHODS: Fetal pigs were divided into three groups according to gestational age: E69 (n = 8), E85 (n = 11), and E114 (n = 6). All pigs were subjected to conventional magnetic resonance imaging (MRI) and diffusion tensor imaging using a GE Signa 3...
August 22, 2017: BMC Medical Imaging
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