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BMC Medical Imaging

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https://www.readbyqxmd.com/read/28219332/the-assessment-of-accessory-mental-foramen-in-a-selected-polish-population-a-cbct-study
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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