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European Journal of Radiology

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https://www.readbyqxmd.com/read/30392950/virtual-non-enhanced-dual-energy-ct-reconstruction-may-replace-true-non-enhanced-ct-scans-in-the-setting-of-suspected-active-hemorrhage
#1
Sven S Walter, Sven Schneeweiß, Michael Maurer, Mareen S Kraus, Julian L Wichmann, Malte N Bongers, Mario Lescan, Fabian Bamberg, Ahmed E Othman
OBJECTIVE: To assess virtual non-enhanced dual energy computed tomography (DECT) reconstruction as a potential alternative to true non-enhanced thoracic and abdominal CT scans in patients with suspected active hemorrhage. METHODS AND MATERIALS: Ninety-seven consecutive patients with suspected active bleeding, who underwent routine triphasic CT with intravenous contrast, were included. All patients underwent single energy non-enhanced (TNE) and arterial phase CT as well as venous DECT...
October 28, 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396678/radiation-dose-for-pediatric-scoliosis-patients-undergoing-whole-spine-radiography-effect-of-the-radiographic-length-in-an-auto-stitching-digital-radiography-system
#2
Yi-Shuan Hwang, Po-Liang Lai, Hui-Yu Tsai, Yung-Chuan Kung, Yu-Ying Lin, Ren-Jhan He, Chen-Te Wu
OBJECTIVE: This study investigated the influence of spatial overlap and radiographic length (RL) on the effective dose (ED) and organ dose for pediatric patients undergoing whole spine radiography using an auto-stitching digital radiography (DR) system. METHODS: First, the system parameters were tested on a 10-year-old pediatric anthropomorphic phantom with a Shimadzu DR system, and the effects of the spatial overlap and RL on radiation doses were validated. The ED and organ dose were calculated on the basis of a Monte Carlo simulation program...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396677/dynamic-contrast-enhanced-mri-perfusion-of-normal-muscle-in-adult-hips-variation-of-permeability-and-semi-quantitative-parameters
#3
Mazen El Rafei, Pedro Teixeira, Laurène Norberciak, Sammy Badr, Anne Cotten, Jean-François Budzik
The purpose of this prospective study was to ascertain the degree of variation of semi-quantitative and permeability parameters on DCE-MRI of normally appearing striated muscles. Dynamic contrast-enhanced MRI of the right hip was performed in 20 women and 24 men. Mean age was 39.1 ± 12.4 years. Two regions of interest (ROI) were drawn in twelve muscles of anterior, medial and gluteal compartments: a free-form ROI covering the largest muscle section and a smaller elliptical ROI. Semi-quantitative and permeability parameters were calculated using the extended Tofts model...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396676/construction-and-validation-of-a-low-cost-paediatric-pelvis-phantom
#4
Ali Mohammed Ali, Peter Hogg, Safora Johansen, Andrew England
PURPOSE: Imaging phantoms can be cost prohibitive, therefore a need exists to produce low cost alternatives which are fit for purpose. This paper describes the development and validation of a low cost paediatric pelvis phantom based on the anatomy of a 5-year-old child. METHODS: Tissue equivalent materials representing paediatric bone (Plaster of Paris; PoP) and soft tissue (Poly methyl methacrylate; PMMA) were used. PMMA was machined to match the bony anatomy identified from a CT scan of a 5-year-old child and cavities were created for infusing the PoP...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396675/comparison-of-breast-cancer-detection-and-depiction-between-planar-and-rotating-synthetic-mammography-generated-from-breast-tomosynthesis
#5
Alejandro Rodriguez-Ruiz, Susanne Lardenoije, Alex J T Wanders, Ioannis Sechopoulos, Ritse M Mann
PURPOSE: To compare breast cancer detection and depiction between planar synthetic mammography (SM) and rotating synthetic mammography (RM) generated from digital breast tomosynthesis (DBT). MATERIALS AND METHODS: In a fully-crossed multi-reader multi-case (MRMC) study, three radiologists retrospectively reviewed 190 cases (27 malignant, 31 benign, 132 normal), once with SM alone and once with RM alone, the DBT stack of slices was not reviewed. Lesions were scored using BI-RADS® and level of suspiciousness (1-10)...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396674/dual-energy-computed-tomography-colonography-using-dual-layer-spectral-detector-computed-tomography-utility-of-virtual-monochromatic-imaging-for-electronic-cleansing
#6
Narumi Taguchi, Seitaro Oda, Masanori Imuta, Sadahiro Yamamura, Yasuhiro Yokota, Takeshi Nakaura, Yasunori Nagayama, Masafumi Kidoh, Daisuke Utsunomiya, Yoshinori Funama, Hideo Baba, Yasuyuki Yamashita
OBJECTIVE: To assess the utility of virtual monochromatic imaging (VMI) using a dual-layer spectral detector CT for electronic cleansing in fecal-tagging CT colonography (CTC). METHODS: This study included 35 patients who underwent fecal-tagging CTC with a dual-layer detector spectral CT scanner. Conventional images at 120 kVp and VMI at 40, 50, and 60 keV were reconstructed. Quantitative image quality parameters, i.e., tagging density and image noise, were compared and the visual image quality was scored on a four-point scale...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396673/diagnostic-performance-of-ct-densities-in-selected-gray-and-white-matter-regions-for-the-clinical-diagnosis-of-brain-death-a-retrospective-study-in-a-tertiary-level-general-hospital
#7
Lyda Marcela Archila-Rincon, Ma Del Carmen Garcia-Blanco, Ernesto Roldan-Valadez
INTRODUCTION: We aimed to determine the diagnostic performance of Hounsfield Units (HUs) in selected brain region using computed tomography for the clinical diagnosis of brain death (BD). METHODS: A retrospective, case-control study design. A total of 66 subjects (22 cases, 44 controls) underwent brain tomography between January 2011 and December 2016. Inclusion criteria for cases considered patients with a CT performed within the 24 first hours of a clinical diagnosis of brain death...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396672/quantitative-evaluation-of-t2-relaxation-times-for-the-differentiation-of-acute-benign-and-malignant-vertebral-body-fractures
#8
Frederic Carsten Schmeel, Julian Alexander Luetkens, Andreas Feißt, Simon Jonas Enkirch, Christoph Hans-Jürgen Endler, Peter Johannes Wagenhäuser, Leonard Christopher Schmeel, Frank Träber, Hans Heinz Schild, Guido Matthias Kukuk
OBJECTIVES: The aim of this prospective study was to evaluate the diagnostic performance of T2*-weighted magnetic resonance imaging (MRI) to differentiate between acute benign and neoplastic vertebral compression fractures (VCFs). MATERIALS AND METHODS: Thirty-seven consecutive patients with a total of 52 VCFs were prospectively enrolled in this IRB approved study. All VCFs were categorized as either benign or malignant according to direct bone biopsy and histopathologic confirmation...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396671/mri-characteristics-of-adductor-longus-lesions-in-professional-football-players-and-prognostic-factors-for-return-to-play
#9
G Pezzotta, A Pecorelli, G Querques, S Biancardi, C Morzenti, S Sironi
PURPOSE: To correctly define through Magnetic Resonance Imaging (MRI), diagnosis, staging and prognosis of the adductor longus (AL) acute lesions and to identify a correlation between Return to Play (RTP) and sport-related injury predisposing conditions and complications. MATERIALS AND METHODS: Twenty professional football players with acute groin pain and clinical suspicion of AL injury subsequent to sport's activity were evaluated. MRI examinations were performed by one and reviewed by other two radiologists with more than 10 years of experience...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396670/quantitative-mri-in-post-operative-paediatric-cerebellar-mutism-syndrome
#10
REVIEW
Sebastian M Toescu, Patrick W Hales, Kristian Aquilina, Chris A Clark
Post-operative paediatric cerebellar mutism syndrome (pCMS) occurs in around 25% of children undergoing surgery for cerebellar and fourth ventricular tumours. Reversible mutism is the hallmark of a syndrome which comprises severe motor, cognitive and linguistic deficits. Recent evidence from advanced neuroimaging studies has led to the current theoretical understanding of the condition as a form of diaschisis contingent on damage to efferent cerebellar circuitry. Tractography data derived from diffusion MRI studies have shown disruption of the dentato-rubro-thalamo-cortical tract in patients with pCMS, and perfusion studies have indicated widespread supratentorial regions which may give rise to the florid signs and symptoms of pCMS...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396669/pars-interarticularis-injury-in-elite-athletes-the-role-of-imaging-in-diagnosis-and-management
#11
King Kenneth Cheung, Ranju T Dhawan, Lester F Wilson, Nicholas S Peirce, Gajan Rajeswaran
Injuries of the lumbar neural arch, in particular the pars interarticularis, are widely considered to be due to abnormal bone stress secondary to repetitive loading/shearing, and are a common pathology and a main cause of lower back pain in elite athletes across a range of sports. Medical imaging plays a pivotal role in the diagnosis, monitoring and prognostication of neural arch injury. Early detection is highly desirable in the young elite athlete, as early injuries have been shown to require shorter recovery time and have a higher potential of full healing, whilst accurate grading of injury allows appropriate rehabilitation planning...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396668/quantitative-assessment-of-pulmonary-vascular-alterations-in-chronic-obstructive-lung-disease-associations-with-pulmonary-function-test-and-survival-in-the-kold-cohort
#12
Young Hoon Cho, Sang Min Lee, Joon Beom Seo, Namkug Kim, Jang Pyo Bae, Jae Seung Lee, Yeon-Mok Oh, Sang Do-Lee
PURPOSE: Despite the high prevalence of pulmonary vascular alterations and their substantial impact on chronic obstructive pulmonary disease (COPD), tools for the direct in vivo assessment of pulmonary vascular alterations remain limited. Thus, the purpose of this study was to automatically extract pulmonary vessels from volumetric chest CT and evaluate the associations between the derived quantitative pulmonary vessel features and clinical parameters, including survival, in COPD patients...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396667/histogram-based-comparison-between-dynamic-and-static-lung-perfused-blood-volume-images-using-dual-energy-ct
#13
Munemasa Okada, Takafumi Nomura, Yoshiteru Nakashima, Shoji Kido, Katsuyoshi Ito
OBJECTIVE: The purpose of this study was to compare the results of a histogram-based analysis of static and dynamic lung perfused blood volume (LPBV) images. METHODS: Sixty-five patients (mean age: 61.3 years, 36 male) underwent dynamic and static LPBV for evaluation of pulmonary vascular diseases (n = 11), lung carcinoma (n = 27) or pulmonary thromboembolism (PTE: n = 27). Seven sets of dynamic sequential scans were performed at the pulmonary trunk using dual-energy technique before the static LPBV scan...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396666/comparison-of-mammography-digital-breast-tomosynthesis-automated-breast-ultrasound-magnetic-resonance-imaging-in-evaluation-of-residual-tumor-after-neoadjuvant-chemotherapy
#14
Jiyoon Park, Eun Young Chae, Joo Hee Cha, Hee Jung Shin, Woo Jung Choi, Young-Wook Choi, Hak Hee Kim
BACKGROUND: To compare the accuracy of mammography (MG), digital breast tomosynthesis (DBT), automated breast ultrasound (ABUS) and magnetic resonance imaging (MRI) for the assessment of residual tumor extent in breast cancer after neoadjuvant chemotherapy (NAC). METHODS: Fifty-one stage II-III breast cancer undergoing NAC were enrolled from March 2015 to December 2016. The longest diameter of residual tumor measured with MG, DBT, ABUS and MRI was compared with the pathologic tumor size...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396665/correlation-between-quantitative-liver-and-spleen-volumes-and-disease-severity-in-primary-sclerosing-cholangitis-as-determined-by-mayo-risk-score
#15
Pegah Khoshpouri, Sanaz Ameli, Mounes Aliyari Ghasabeh, Ankur Pandey, Manijeh Zarghampour, Farnaz Najmi Varzaneh, Angela Jacob, Pallavi Pandey, Yan Luo, Ihab R Kamel
OBJECTIVES: To correlate total and lobar liver and spleen volume with disease severity in primary sclerosing cholangitis (PSC) as determined by Mayo risk score. METHODS: This HIPAA-compliant single center retrospective study included 147 PSC patients with available imaging studies (MRCP/CT) and laboratory data between January 2003 and January 2018. Total and lobar (right, left and caudate) liver volume and spleen volume were measured. ANOVA test was performed to assess the differences in volumes between low, intermediate and high-risk groups (Mayo risk score <0, >0 and <2, >2, respectively)...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396664/apparent-diffusion-coefficient-reproducibility-in-brain-tumors-measured-on-1-5-and-3-t-clinical-scanners-a-pilot-study
#16
Zulejha Merhemic, Bilal Imsirovic, Nurija Bilalovic, Dragan Stojanov, Jasmina Boban, Majda M Thurnher
BACKGROUND: Gradient and coil systems, pulse sequence design, and imaging parameters, as well as different scanners, can influence apparent diffusion coefficient (ADC) values. The aim of this study was to evaluate the effect of two different field strengths on the reproducibility of mean absolute ADC measurements in various primary and secondary brain tumors. METHODS: Fifty patients with histologically proven brain tumors were prospectively examined on two MR scanners from the same vendor, with different field strengths-1...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396663/impact-of-computed-tomography-ct-derived-fractional-flow-reserve-on-reader-confidence-for-interpretation-of-coronary-ct-angiography
#17
Christoph Artzner, Melissa Daubert, Wendy Ehieli, David Kong, Joseph Mammarappallil, Konstantin Nikolaou, Daniel T Boll, Lynne Koweek
PURPOSE: To assess the impact of computed tomography-derived fractional flow reserve (FFRCT ) on reader confidence and reader time for interpretation of coronary computed tomography angiography (CCTA). MATERIAL AND METHODS: This IRB-approved, HIPAA-compliant, consent waivered, quality-improvement study included 50 patients (23 women, age 67 ± 12years, body mass index 28.7 ± 5.3 kg/m2 ). CCTA was acquired on 2nd and 3rd generation dual-source MDCT with use of beta-blockers and nitroglycerin, and FFRCT was calculated (HeartFlow,Redwood City,CA)...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396662/optimal-threshold-for-the-diagnosis-of-anemia-severity-on-unenhanced-thoracic-ct-a-preliminary-study
#18
Qing-Qing Zhou, Yu-Sheng Yu, Yu-Chen Chen, Bi-Biao Ding, Si-Yue Fang, Xianfeng Yang, Bing Zhang, Hong Zhang
OBJECTIVE: To investigate and evaluate the value as accuracy of diagnosis different degrees of anemia through the unenhanced thoracic computed tomography (CT) scan. MATERIALS AND METHODS: The CT attenuation of right ventricle (RV) cavity, left ventricular (LV) cavity, interventricular septum and difference between the interventricular septum and left ventricle cavity (IVS-LV) were retrospectively analyzed and measured in 317 patients with different degrees of anemia and the normal patients...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396661/primary-and-metastatic-malignancies-of-the-lung-retrospective-analysis-of-the-ct-guided-high-dose-rate-brachytherapy-ct-hdrbt-ablation-in-tumours-4-cm-and-%C3%A2-4-cm
#19
Martin Jonczyk, Federico Collettini, Dirk Schnapauff, Dominik Geisel, Georg Böning, Felix Feldhaus, Gero Wieners, Bernd Hamm, Bernhard Gebauer
BACKGROUND: Minimal invasive local therapies are alternative treatment options in patients with primary and metastatic lung malignancies being not eligible for resection. However, thermal ablations are often limited by large tumour volumes. PURPOSE: To evaluate the efficacy and safety of CT-HDRBT in pulmonary tumours ≥4 cm compared to smaller tumours. MATERIAL AND METHODS: In this retrospective study, 74 consecutive patients (mean age: 63 ± 12; m: 39, w: 35) with a total of 175 tumours treated in 132 interventions were enrolled between October 2003 and September 2016...
November 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30396660/investigating-the-correlation-of-arterial-spin-labeling-and-dynamic-contrast-enhanced-perfusion-in-primary-tumor-of-nasopharyngeal-carcinoma
#20
Meng Lin, Xiaoduo Yu, Dehong Luo, Han Ouyang, Lizhi Xie, Bing Wu, Chunwu Zhou
PURPOSE: This prospective study aimed to investigate the correlation between two perfusion methods: arterial spin labeling (ASL) and dynamic contrast enhanced (DCE) technique in patients with nasopharyngeal carcinoma (NPC) and to optimize ASL protocol. MATERIALS AND METHODS: Forty-five newly diagnosed NPC patients underwent MR examinations with both 3D pseudo-continuous ASL (pCASL) and DCE-MRI sequences. Tumor blood flow (TBF) derived in pCASL with three post-labeling delay (PLD) times (i...
November 2018: European Journal of Radiology
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