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BMC Medical Imaging

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https://read.qxmd.com/read/30767773/computed-tomography-volumetry-of-esophageal-cancer-the-role-of-semiautomatic-assessment
#1
Yi-Hua Zhang, Michael A Fischer, Henrik Lehmann, Åse Johnsson, Ioannis Rouvelas, Gunnar Herlin, Lars Lundell, Torkel B Brismar
BACKGROUND: The clinical and research value of Computed Tomography (CT) volumetry of esophageal cancer tumor size remains controversial. Development in CT technique and image analysis has made CT volumetry less cumbersome and it has gained renewed attention. The aim of this study was to assess esophageal tumor volume by semi-automatic measurements as compared to manual. METHODS: A total of 23 esophageal cancer patients (median age 65, range 51-71), undergoing CT in the portal-venous phase for tumor staging, were retrospectively included between 2007 and 2012...
February 15, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30764784/clinical-and-imaging-manifestations-of-primary-cardiac-angiosarcoma
#2
Jin-Fen Yu, Hui Cui, Guo-Min Ji, Shu-Qi Li, Yong Huang, Ruo-Ning Wang, Wen-Feng Xiao
BACKGROUND: To investigate the CT manifestations of primary cardiac angiosarcoma. METHODS: The clinical and CT data for 9 patients with cardiac angiosarcoma were retrospectively analyzed. RESULTS: The lesions in all nine cases were located in the right atrium. In two cases, the involved lesion led downward to the tricuspid valve and right ventricle, and the dynamic cine showed that the lesion affected the opening and closing of the tricuspid valve...
February 14, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30744586/coreslicer-a-web-toolkit-for-analytic-morphomics
#3
Louis Mullie, Jonathan Afilalo
BACKGROUND: Analytic morphomics, or more simply, "morphomics," refers to the measurement of specific biomarkers of body composition from medical imaging, most commonly computed tomography (CT) images. An emerging body of literature supports the use of morphomic markers measured on single-slice CT images for risk prediction in a range of clinical populations. However, uptake by healthcare providers been limited due to the lack of clinician-friendly software to facilitate measurements...
February 11, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30736759/measuring-liver-fat-fraction-with-complex-based-chemical-shift-mri-the-effect-of-simplified-sampling-protocols-on-accuracy
#4
Alexander J Procter, Julia Y Sun, Paul N Malcolm, Andoni P Toms
BACKGROUND: The assessment of liver percentage fat fraction (%FF) using proton density fat fraction sequences is becoming increasingly accessible. Previous studies have tended to use multiple small ROIs that focus on Couinaud segments. In an effort to simplify day-to-day analysis, this study assesses the impact of using larger, elliptical ROIs focused on a single hepatic lobe. Additionally, we assess the impact of sampling fewer transhepatic slices when measuring %FF. METHODS: Retrospective analysis of prospectively obtained images from 34 volunteers using an IDEAL IQ sequence...
February 8, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30717680/development-of-ct-based-methods-for-longitudinal-analyses-of-paranasal-sinus-osteitis-in-granulomatosis-with-polyangiitis
#5
Sigrun Skaar Holme, Jon Magnus Moen, Karin Kilian, Hilde Haukeland, Øyvind Molberg, Heidi B Eggesbø
BACKGROUND: Even though progressive rhinosinusitis with osteitis is a major clinical problem in granulomatosis with polyangiitis (GPA), there are no studies on how GPA-related osteitis develops over time, and no quantitative methods for longitudinal assessment. Here, we aimed to identify simple and robust CT-based methods for capture and quantification of time-dependent changes in GPA-related paranasal sinus osteitis and compare performance of the methods under study in a largely unselected GPA cohort...
February 4, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30683072/use-of-magnetic-resonance-imaging-combined-with-gene-analysis-for-the-diagnosis-of-fetal-congenital-heart-disease
#6
Lishun Wang, Hongyan Nie, Qichen Wang, Guoliang Zhang, Gang Li, Liwei Bai, Tianshu Hua, Shuzhang Wei
BACKGROUND: Fetal deformity is a disease caused by abnormal chromosome structure, which may be influenced by genetic factors as well as the maternal and external environment. Magnetic resonance imaging (MRI) may be used to effectively diagnose fetus deformities. However it has been reported that gene analysis is a more accurate diagnostic method. The aim of the present study was to investigate the effectiveness of MRI in combination with gene analysis for the diagnosis of fetal congenital heart disease, a form of fetus deformity...
January 25, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30678650/hypoglycemic-encephalopathy-mimicking-acute-ischemic-stroke-in-clinical-presentation-and-magnetic-resonance-imaging-a-case-report
#7
Kai-I Chuang, Kevin Li-Chun Hsieh, Cheng-Yu Chen
BACKGROUND: The imaging findings of hypoglycemic encephalopathy can be considerably similar to those of ischemic infarction or toxic leukoencephalopathy. We demonstrated unusual magnetic resonance (MR) imaging features of hypoglycemic encephalopathy which can be confused with other pathology both on imaging and acute clinical presentation. The diffusion-weighted imaging (DWI) and apparent diffusion coefficients (ADC) map findings in our case further supports the hypothesis of hypoglycemia-induced "excitotoxic injury" of glial cells and myelin sheath that might protect neuron axons from intracellular edema and irreversible damage...
January 24, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30674282/improving-the-prediction-of-the-trabecular-bone-microarchitectural-parameters-using-dental-cone-beam-computed-tomography
#8
Rong-Ting He, Ming-Gene Tu, Heng-Li Huang, Ming-Tzu Tsai, Jay Wu, Jui-Ting Hsu
BACKGROUND: In this study, we explored how various preprocessing approaches can be employed to enhance the capability of dental CBCT to accurately estimate trabecular bone microarchitectural parameters. METHODS: In total, 30 bovine vertebrae cancellous bone specimens were used for in study. Voxel resolution 18-μm micro-computed tomography (micro-CT) and 100-μm dental CBCT were used to scan each specimen. Micro-CT images were used to calculate trabecular bone microarchitectural parameters; the results were set as the gold standard...
January 23, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30665370/accuracy-of-a-non-invasive-ct-based-measuring-technique-for-cement-penetration-depth-in-human-tibial-uka
#9
Christian B Scheele, Peter E Müller, Christian Schröder, Thomas Grupp, Volkmar Jansson, Matthias F Pietschmann
BACKGROUND: Aseptic loosening of the tibial component remains a major cause of failure in unicompartmental knee arthroplasty (UKA) and may be related to micro-motion at the cement-bone interface due to insufficient cement penetration depth. Cement penetration is therefore taken as an indicator of solid fixation strength and primary stability. However, its non-invasive clinical assessment remains difficult in vivo as conventional x-ray is prone to distortion and CT-scans (computed tomography) are difficult to assess due to metal artifacts...
January 21, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30660203/an-automatic-restoration-framework-based-on-gpu-accelerated-collateral-filtering-in-brain-mr-images
#10
Herng-Hua Chang, Cheng-Yuan Li
BACKGROUND: Image restoration is one of the fundamental and essential tasks within image processing. In medical imaging, developing an effective algorithm that can automatically remove random noise in brain magnetic resonance (MR) images is challenging. The collateral filter has been shown a more powerful algorithm than many existing methods. However, the computation of the collateral filter is more time-consuming and the selection of the filter parameters is also laborious. This paper proposes an automatic noise removal system based on the accelerated collateral filter for brain MR images...
January 19, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30658569/the-role-of-ultrasound-in-the-diagnosis-of-the-coexistence-of-primary-hyperparathyroidism-and-non-medullary-thyroid-carcinoma
#11
Jian Shen, Qiong Wu, Yan Wang
BACKGROUND: The coexistence of primary hyperparathyroidism(PHPT) and papillary thyroid cancer(PTC) is a known entity; it is a rare and complicated setting for diagnostic imaging. METHODS: After reviewing clinical data of 112 patients who had been treated for PHPT in our facility between January 2015 and December 2017, we identified 7 non-medullary thyroid carcinoma (NMTC) (6.25%). All of them had taken an ultrasound scan and undergone operation. In addition, we have also reviewed relevant reports from other facilities addressing PHPT and NMTC (Mainly PTC)...
January 18, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30654748/temporally-constrained-ica-with-threshold-and-its-application-to-fmri-data
#12
Zhiying Long, Zhi Wang, Jing Zhang, Xiaojie Zhao, Li Yao
BACKGROUND: Although independent component analysis (ICA) has been widely applied to functional magnetic resonance imaging (fMRI) data to reveal spatially independent brain networks, the order indetermination of ICA leads to the problem of target component selection. The temporally constrained independent component analysis (TCICA) is capable of automatically extracting the desired spatially independent components by adding the temporal prior information of the task to the mixing matrix for fMRI data analysis...
January 17, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30642288/mr-imaging-features-of-spinal-pilocytic-astrocytoma
#13
De-Jun She, Yi-Ping Lu, Ji Xiong, Dao-Ying Geng, Bo Yin
BACKGROUND: The purpose of this retrospective review is to determine the MR imaging features of pilocytic astrocytoma (PA) in the spinal cord to help neuroradiologists preoperatively differentiate PA from other intramedullary tumors. METHODS: Neuro-oncology database review revealed 13 consecutive patients with a pathological spinal PA diagnosis and availability of preoperative MR imaging. Three patients had preoperative diffusion-weighted MR imaging. Demographics and conventional and diffusion MR imaging records were retrospectively evaluated...
January 14, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30635023/reduced-scan-range-abdominopelvic-ct-in-patients-with-suspected-acute-appendicitis-impact-on-diagnostic-accuracy-and-effective-radiation-dose
#14
Dominik Zinsser, Michael Maurer, Phuong-Linh Do, Jakob Weiß, Mike Notohamiprodjo, Fabian Bamberg, Ahmed E Othman
BACKGROUND: To evaluate a reduced range CT protocol in patients with suspected acute appendicitis as compared to standard abdominal CT regarding diagnostic performance, effective radiation dose and organ doses. METHODS: In this study, we retrospectively included 90 patients (43 female, mean age 56.7 ± 17 years) with suspected acute appendicitis who underwent CT of abdomen and pelvis. From those CTs, we reconstructed images with a reduced scan range from L1 to the the pubic symphysis...
January 11, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30612560/improved-visualization-of-peripherally-inserted-central-catheters-on-chest-radiographs-of-neonates-using-fractional-multiscale-image-processing
#15
Rebecca A Hammon, Hannes Seuss, Matthias Hammon, Christian Grillhösl, Rafael Heiss, Martin Zeilinger, Nadine Bayerl, Pieter Vuylsteke, Friedrich Wanninger, Michael Schroth, Michael Uder, Oliver Rompel
BACKGROUND: Peripherally inserted central catheters (PICCs) provide secure intravenous access for the delivery of life-sustaining medications and nutrition. They are commonly used in pediatrics. Confirmation of correct central catheter tip position is crucial. Verification is usually done by a radiograph. The aim of this study is to evaluate the ability of Fractional Multiscale image Processing (FMP) to detect PICC tips on the digital chest radiographs of neonates. METHODS: A total of 94 radiographs of 47 patients were included in the study...
January 7, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30611240/probing-the-intravascular-and-interstitial-compartments-of-remodeled-myocardium-in-heart-failure-patients-with-preserved-and-reduced-ejection-fraction-a-cmr-study
#16
Pier Giorgio Masci, Anna Giulia Pavon, Gregoire Berchier, Juerg Schwitter
BACKGROUND: Recent autopsy studies found microvascular rarefaction in remodeled myocardium of patients who died of heart failure with preserved ejection-fraction (HFpEF). This condition has not been investigated so far by non-invasive methods in patients with HFpEF. The aim was to quantify the intravascular volume (IVV) compartment by CMR in HFpEF patients. METHODS: In two separate CMR examinations, HFpEF patients (n = 6; 12 examinations) and post-myocardial infarction patients (post-MI; n = 6; 12 examinations) were studied with T1 -mapping (MOLLI-sequence) before and after IV bolus of 0...
January 5, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30611228/screening-mammography-for-second-breast-cancers-in-women-with-history-of-early-stage-breast-cancer-factors-and-causes-associated-with-non-detection
#17
Yoo Kyung Yeom, Eun Young Chae, Hak Hee Kim, Joo Hee Cha, Hee Jung Shin, Woo Jung Choi
BACKGROUND: The aim of our study was to identify the factors and causes associated with non-detection for second breast cancers on screening mammography in women with a personal history of early-stage breast cancer. METHODS: Between January 2000 and December 2008, 7976 women with early-stage breast cancer underwent breast surgery in our institution. The inclusion criteria of our study were patients who had: (a) subsequent in-breast recurrence, (b) surveillance mammography within 1 year before recurrence...
January 5, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30587152/evaluation-of-quantitative-parameters-of-dynamic-contrast-enhanced-magnetic-resonance-imaging-in-qualitative-diagnosis-of-hepatic-masses
#18
Jingjing Chen, Youjiao Si, Kaikai Zhao, Xianglong Shi, Weiqun Bi, Shi-En Liu, Hui Hua
BACKGROUND: To explore the value of parameters of multiphase dynamic contrast-enhanced magnetic resonance imaging (MDCE-MRI) in the qualitative diagnosis of hepatic masses. METHODS: Eighty patients with hepatic masses were retrospectively analyzed. All the patients underwent MDCE-MRI at 3.0 T MR before treatment. Mean enhancement time (MET), positive enhancement integral (PEI), a maximum slope of increase (MSI), and a maximum slope of decrease (MSD) were measured...
December 27, 2018: BMC Medical Imaging
https://read.qxmd.com/read/30577768/mri-assessment-of-aortic-flow-in-patients-with-pulmonary-arterial-hypertension-in-response-to-exercise
#19
Jacob A Macdonald, Christopher J Franҫois, Omid Forouzan, Naomi C Chesler, Oliver Wieben
BACKGROUND: While primarily a right heart disease, pulmonary arterial hypertension (PAH) can impact left heart function and aortic flow through a shifted interventricular septum from right ventricular pressure overload and reduced left ventricular preload, among other mechanisms. In this study, we used phase contrast (PC) MRI and a modest exercise challenge to examine the effects of PAH on systemic circulation. While exercise challenges are typically performed with ultrasound in the clinic, MRI exercise studies allow for more reproducible image alignment, more accurate flow quantification, and improved tissue contrast...
December 22, 2018: BMC Medical Imaging
https://read.qxmd.com/read/30567503/atypical-localization-of-intraosseous-angioleiomyoma-in-the-rib-of-a-pediatric-patient-a-case-report
#20
Goran Djuričić, Zorica Milošević, Tijana Radović, Nataša Milčanović, Predrag Djukić, Marko Radulovic, Jelena Sopta
BACKGROUND: This is the first reported case of a primary intraosseous angioleiomyoma and the second case of a primary leiomyoma of the rib, irrespective of age. Angioleiomyomas mostly occur in patients of advanced age, in any part of the body, particularly the lower extremities and present as painful, slow-growing nodules in the dermis, subcutaneous fat or deep fascia. Other localizations, especially bone, are considered extremely rare, as well as their occurrence in paediatric patients...
December 19, 2018: BMC Medical Imaging
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