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BMC Medical Imaging

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https://www.readbyqxmd.com/read/28302073/image-quality-improvement-using-model-based-iterative-reconstruction-in-low-dose-chest-ct-for-children-with-necrotizing-pneumonia
#1
Jihang Sun, Tong Yu, Jinrong Liu, Xiaomin Duan, Di Hu, Yong Liu, Yun Peng
BACKGROUND: Model-based iterative reconstruction (MBIR) is a promising reconstruction method which could improve CT image quality with low radiation dose. The purpose of this study was to demonstrate the advantage of using MBIR for noise reduction and image quality improvement in low dose chest CT for children with necrotizing pneumonia, over the adaptive statistical iterative reconstruction (ASIR) and conventional filtered back-projection (FBP) technique. METHODS: Twenty-six children with necrotizing pneumonia (aged 2 months to 11 years) who underwent standard of care low dose CT scans were included...
March 16, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28274212/analysis-of-the-three-dimensional-anatomical-variance-of-the-distal-radius-using-3d-shape-models
#2
Sebastian F Baumbach, Jakob Binder, Alexander Synek, Fabian G Mück, Yan Chevalier, Ekkehard Euler, Georg Langs, Lukas Fischer
BACKGROUND: Various medical fields rely on detailed anatomical knowledge of the distal radius. Current studies are limited to two-dimensional analysis and biased by varying measurement locations. The aims were to 1) generate 3D shape models of the distal radius and investigate variations in the 3D shape, 2) generate and assess morphometrics in standardized cut planes, and 3) test the model's classification accuracy. METHODS: The local radiographic database was screened for CT-scans of intact radii...
March 9, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28259149/focused-cardiac-ultrasound-by-unselected-residents-the-challenges
#3
Vidar Ruddox, Ingvild Billehaug Norum, Thomas Muri Stokke, Thor Edvardsen, Jan Erik Otterstad
BACKGROUND: Focus Cardiac Ultrasound (FoCUS) performed by internal medicine residents on call with 2 h of training can provide a means for ruling out cardiac disease, but with poor sensitivity. The purpose of the present study was to evaluate diagnostic usefulness as well as diagnostic accuracy of FoCUS following 4 h of training. METHODS: All residents on call were given a 4-h training course with an additional one-hour training course after 6 months. They were asked to provide a pre- and post-FoCUS diagnosis, with the final diagnosis at discharge as reference...
March 4, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28259145/ultrasonographic-prevalence-and-characteristics-of-non-palpable-thyroid-incidentalomas-in-a-hospital-based-population-in-a-sub-saharan-country
#4
Boniface Moifo, Jean Roger Moulion Tapouh, Sylviane Dongmo Fomekong, François Djomou, Emmanuella Manka'a Wankie
BACKGROUND: Thyroid incidentalomas (TI) are highly prevalent asymptomatic thyroid nodules with ultrasound as the best imaging modality for their detection and characterization. Although they are mostly benign, potential for malignancy is up to 10-15%. In sub-Saharan Africa little data exists on the prevalence and risk categorization of TI. The aim of this study was to determine the prevalence and ultrasound characteristics of non-palpable thyroid incidentalomas among adults in sub-Saharan setting...
March 4, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28249571/evaluating-segmental-liver-function-using-t1-mapping-on-gd-eob-dtpa-enhanced-mri-with-a-3-0-tesla
#5
Zhi-Peng Zhou, Li-Ling Long, Wei-Jia Qiu, Ge Cheng, Li-Juan Huang, Teng-Fei Yang, Zhong-Kui Huang
BACKGROUND: Assessing the liver function provides valuable information to evaluate surgical risk and plan accordingly. Current studies focus on whole liver function evaluation. However, assessment of segmental liver function is equally important in the clinical practice. The purpose of this study was to investigate whether Gd-EOB-DTPA-enhanced MRI can evaluate the liver function of each segment by using T1 mapping at 3 Tesla MRI. METHODS: One hundred three patients were classified into one of 4 groups: a normal liver function (NLF) group (n = 38), a liver cirrhosis with Child-Pugh A (LCA) group (n = 33), a liver cirrhosis with Child-Pugh B (LCB) group (n = 21), and a liver cirrhosis with Child-Pugh C (LCC) group (n = 11)...
March 1, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28241751/time-resolved-tracking-of-the-atrioventricular-plane-displacement-in-cardiovascular-magnetic-resonance-cmr-images
#6
Felicia Seemann, Ulrika Pahlm, Katarina Steding-Ehrenborg, Ellen Ostenfeld, David Erlinge, Jean-Luc Dubois-Rande, Svend Eggert Jensen, Dan Atar, Håkan Arheden, Marcus Carlsson, Einar Heiberg
BACKGROUND: Atrioventricular plane displacement (AVPD) is an indicator for systolic and diastolic function and accounts for 60% of the left ventricular, and 80% of the right ventricular stroke volume. AVPD is commonly measured clinically in echocardiography as mitral and tricuspid annular plane systolic excursion (MAPSE and TAPSE), but has not been applied widely in cardiovascular magnetic resonance (CMR). To date, there is no robust automatic algorithm available that allows the AVPD to be measured clinically in CMR with input in a single timeframe...
February 28, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28241752/distal-radius-plate-of-cfr-peek-has-minimal-effect-compared-to-titanium-plates-on-bone-parameters-in-high-resolution-peripheral-quantitative-computed-tomography-a-pilot-study
#7
Joost J A de Jong, Arno Lataster, Bert van Rietbergen, Jacobus J Arts, Piet P Geusens, Joop P W van den Bergh, Paul C Willems
BACKGROUND: Carbon-fiber-reinforced poly-ether-ether-ketone (CFR-PEEK) has superior radiolucency compared to other orthopedic implant materials, e.g. titanium or stainless steel, thus allowing metal-artifact-free postoperative monitoring by computed tomography (CT). Recently, high-resolution peripheral quantitative CT (HRpQCT) proved to be a promising technique to monitor the recovery of volumetric bone mineral density (vBMD), micro-architecture and biomechanical parameters in stable conservatively treated distal radius fractures...
February 27, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28219332/the-assessment-of-accessory-mental-foramen-in-a-selected-polish-population-a-cbct-study
#8
Ewa Zmysłowska-Polakowska, Mateusz Radwański, Michał Łęski, Sławomir Ledzion, Monika Łukomska-Szymańska, Michał Polguj
BACKGROUND: Accessory mental foramen (AMF) is a rare anatomical variation. When accessory mental foramen is present, the nerves and vessels that go through the mental foramen (MF) must follow alternative courses and special care must be taken during dental treatment planning. The purpose of this study was to evaluate the occurrence and the location of AMF in a selected Polish population using cone-beam computed tomography (CBCT). METHODS: Two hundred CBCT (105 males and 95 females) examinations were evaluated for the presence of AMFs...
February 20, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28196476/automatic-mri-segmentation-of-para-pharyngeal-fat-pads-using-interactive-visual-feature-space-analysis-for-classification
#9
Muhammad Laiq Ur Rahman Shahid, Teodora Chitiboi, Tetyana Ivanovska, Vladimir Molchanov, Henry Völzke, Lars Linsen
BACKGROUND: Obstructive sleep apnea (OSA) is a public health problem. Detailed analysis of the para-pharyngeal fat pads can help us to understand the pathogenesis of OSA and may mediate the intervention of this sleeping disorder. A reliable and automatic para-pharyngeal fat pads segmentation technique plays a vital role in investigating larger data bases to identify the anatomic risk factors for the OSA. METHODS: Our research aims to develop a context-based automatic segmentation algorithm to delineate the fat pads from magnetic resonance images in a population-based study...
February 14, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28196474/biodegradable-magnesium-herbert-screw-image-quality-and-artifacts-with-radiography-ct-and-mri
#10
Lena Sonnow, Sören Könneker, Peter M Vogt, Frank Wacker, Christian von Falck
BACKGROUND: Magnesium alloys have recently been rediscovered as biodegradable implants in musculoskeletal surgery. This study is an ex-vivo trial to evaluate the imaging characteristics of magnesium implants in different imaging modalities as compared to conventional metallic implants. METHODS: A CE-approved magnesium Herbert screw (MAGNEZIX®) and a titanium screw of the same dimensions (3.2x20 mm) were imaged using different modalities: digital radiography (DX), multidetector computed tomography (MDCT), high resolution flat panel CT (FPCT) and magnetic resonance imaging (MRI)...
February 14, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28193267/abdominal-ultrasound-scanning-versus-non-contrast-computed-tomography-as-screening-method-for-abdominal-aortic-aneurysm-a-validation-study-from-the-randomized-dancavas-study
#11
Mads Liisberg, Axel C Diederichsen, Jes S Lindholt
BACKGROUND: Validating non-contrast-enhanced computed tomography (nCT) compared to ultrasound sonography (US) as screening method for abdominal aortic aneurysm (AAA) screening. METHODS: Consecutively attending men (n = 566) from the pilot study of the randomized Danish CardioVascular Screening trial (DANCAVAS trial), underwent nCT and US examination. Diameters were measured in outer-to-outer fashion. Sensitivity and specificity were done testing each modality against each other as reference standard...
February 14, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28193201/an-artificial-neural-networks-approach-for-assessment-treatment-response-in-oncological-patients-using-pet-ct-images
#12
Mariana A Nogueira, Pedro H Abreu, Pedro Martins, Penousal Machado, Hugo Duarte, João Santos
BACKGROUND: Positron Emission Tomography - Computed Tomography (PET/CT) imaging is the basis for the evaluation of response-to-treatment of several oncological diseases. In practice, such evaluation is manually performed by specialists, which is rather complex and time-consuming. Evaluation measures have been proposed, but with questionable reliability. The usage of before and after-treatment image descriptors of the lesions for treatment response evaluation is still a territory to be explored...
February 13, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28183279/three-dimensional-comparison-of-intramuscular-fat-content-between-young-and-old-adults
#13
Akito Yoshiko, Maya Hioki, Nana Kanehira, Kiyoshi Shimaoka, Teruhiko Koike, Hisataka Sakakibara, Yoshiharu Oshida, Hiroshi Akima
BACKGROUND: Fat infiltration within skeletal muscle is known as intramuscular fat (IMF), which increases with aging. Studies have assessed IMF content, using the mid-thigh as a representative location. However, three-dimensional IMF distribution is not well understood. The aim of this study was to compare the IMF content in young and old adults by assessing its distribution along the length of the thigh. METHODS: Consecutive transaxial images of the right thighs in 15 young (age, 21...
February 10, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28143434/combination-of-ivim-dwi-and-3d-asl-for-differentiating-true-progression-from-pseudoprogression-of-glioblastoma-multiforme-after-concurrent-chemoradiotherapy-study-protocol-of-a-prospective-diagnostic-trial
#14
Zhi-Cheng Liu, Lin-Feng Yan, Yu-Chuan Hu, Ying-Zhi Sun, Qiang Tian, Hai-Yan Nan, Ying Yu, Qian Sun, Wen Wang, Guang-Bin Cui
BACKGROUND: Standard therapy for Glioblastoma multiforme (GBM) involves maximal safe tumor resection followed with radiotherapy and concurrent adjuvant temozolomide. About 20 to 30% patients undergoing their first post-radiation MRI show increased contrast enhancement which eventually recovers without any new treatment. This phenomenon is referred to as pseudoprogression. Differentiating tumor progression from pseudoprogression is critical for determining tumor treatment, yet this capacity remains a challenge for conventional magnetic resonance imaging (MRI)...
February 1, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28143433/developing-a-nomogram-based-on-multiparametric-magnetic-resonance-imaging-for-forecasting-high-grade-prostate-cancer-to-reduce-unnecessary-biopsies-within-the-prostate-specific-antigen-gray-zone
#15
Xiang-Ke Niu, Jun Li, Susant Kumar Das, Yan Xiong, Chao-Bing Yang, Tao Peng
BACKGROUND: Since 1980s the application of Prostate specific antigen (PSA) brought the revolution in prostate cancer diagnosis. However, it is important to underline that PSA is not the ideal screening tool due to its low specificity, which leads to the possible biopsy for the patient without High-grade prostate cancer (HGPCa). Therefore, the aim of this study was to establish a predictive nomogram for HGPCa in patients with PSA 4-10 ng/ml based on Prostate Imaging Reporting and Data System version 2 (PI-RADS v2), MRI-based prostate volume (PV), MRI-based PV-adjusted Prostate Specific Antigen Density (adjusted-PSAD) and other traditional classical parameters...
February 1, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28143419/t2-relaxation-time-for-intervertebral-disc-degeneration-in-patients-with-upper-back-pain-initial-results-on-the-clinical-use-of-3-0-tesla-mri
#16
Raoying Xie, Linhui Ruan, Lei Chen, Kai Zhou, Jiandong Yuan, Wei Ji, Guangjian Jing, Xiaojing Huang, Qinglei Shi, Chun Chen
BACKGROUND: Magnetic resonance imaging (MRI) is a useful non-invasive tool for evaluating abnormalities of intervertebral discs. However, there are few studies which applied functional MRI techniques to investigate degenerative changes in cervical and cervicothoracic junction (CTJ) spine among adults. The aim of this study was to compare T2 relaxation time measurement evaluation with morphological grading for assessing cervical and CTJ intervertebral discs (IVD) in the patients suffering neck, shoulder, and upper back pain...
January 31, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28109248/characteristics-of-incidentally-found-thyroid-nodules-in-computed-tomography-comparison-with-thyroid-scintigraphy
#17
Shahin Zandieh, Dina Muin, Reinhard Bernt, Karl Hittmair, Joerg Haller, Klaus Hergan
BACKGROUND: In our daily experience, the differentiation between a cold and hot nodule is a very important factor for further clinical management of the patient. In this study, we compared the characteristics of incidentally found thyroid nodules detected on computed tomography (CT) to thyroid scintigraphy (TS). METHODS: Diagnostic reports from chest CT with intravenous contrast and TS examinations performed from January 2013 to January 2016 were analyzed retrospectively...
January 21, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28103839/computed-tomography-and-magnetic-resonance-imaging-of-a-plexiform-angiomyxoid-myofibroblastic-tumor-a-case-report
#18
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
#19
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
#20
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
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