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European Radiology

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https://www.readbyqxmd.com/read/30413966/radiomics-model-of-contrast-enhanced-computed-tomography-for-predicting-the-recurrence-of-acute-pancreatitis
#1
Yong Chen, Tian-Wu Chen, Chang-Qiang Wu, Qiao Lin, Ran Hu, Chao-Lian Xie, Hou-Dong Zuo, Jia-Long Wu, Qi-Wen Mu, Quan-Shui Fu, Guo-Qing Yang, Xiao Ming Zhang
OBJECTIVES: To predict the recurrence of acute pancreatitis (AP) by constructing a radiomics model of contrast-enhanced computed tomography (CECT) at AP first attack. METHODS: We retrospectively enrolled 389 first-attack AP patients (271 in the primary cohort and 118 in the validation cohort) from three tertiary referral centers; 126 and 55 patients endured recurrent attacks in each cohort. Four hundred twelve radiomics features were extracted from arterial and venous phase CECT images, and clinical characteristics were gathered to develop a clinical model...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413965/non-measurable-infiltrative-hcc-is-post-contrast-attenuation-on-ct-a-sign-of-tumor-response
#2
Hasmik Koulakian, Wassim Allaham, Valérie Vilgrain, Maxime Ronot
OBJECTIVES: To evaluate the value of CT attenuation to assess the response to sorafenib in infiltrative/endovascular non-measurable advanced hepatocellular carcinoma (HCC). METHODS: From 2007 to 2014, patients with infiltrative HCC ± tumor-in-vein (TIV) were retrospectively included. Attenuation of tumors and TIV were measured at baseline and follow-up on arterial and portal venous phase CT by two independent radiologists. Attenuation changes (overall and as per Choi criteria) and Child-Pugh score were correlated to overall survival...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413964/the-efficacy-of-fluoroscopy-guided-epidural-blood-patch-in-the-treatment-of-spontaneous-and-iatrogenic-cerebrospinal-fluid-leakage
#3
Can Özütemiz, Yasemin Kocabaş Köksel, Haitao Huang, Nathan Rubin, Jeffrey B Rykken
OBJECTIVE: To evaluate patient outcomes following fluoroscopy-guided epidural blood patch (FGEBP), factors affecting the outcome, and to identify the rate of fluoroscopy-guided lumbar punctures (FGLP) requiring FGEBP. METHODS: All FGLPs and FGEBPs between January 2014 and May 2017 were retrospectively evaluated. Information regarding patient characteristics, details of previous dural puncture (DP), details of the FGEBP, and FGEBP outcome were recorded. The outcome was classified into three categories as "complete response", "partial response", and "no response"...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413963/cavographic-vs-cross-sectional-measurement-of-the-inferior-vena-cava-diameter-before-filter-placement-are-we-routinely-oversizing
#4
Yu-Dong Xiao, Zi-Shu Zhang, Cong Ma
OBJECTIVE: A megacava (vena cava with a diameter of 28 mm or greater) requires a particular filter to avoid migration. However, caval morphologies are variable. As the inferior vena cava (IVC) usually adopts a circular geometry after a filter is inserted, this study aims (a) to classify caval geometry and orientation; (b) to compare discrepancy between anterioposterior projective diameter (PD) and circumference-based calculated diameter (CD) measurements on cross-sectional computed tomography (CT) images; (c) if a discrepancy exists, determine how often it can affect IVC filter selection...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413962/psoas-proximal-insertion-as-a-simple-and-reliable-landmark-for-numbering-lumbar-vertebrae-on-mri-of-the-lumbar-spine
#5
François Ropars, J Mesrar, J Ognard, S Querellou, J Rousset, M Garetier
OBJECTIVE: To evaluate the value of psoas muscle proximal insertion for correct numbering of the lumbar vertebrae in MRI, in particular in case of lumbosacral transitional vertebra (LSTV). METHODS: Two radiologists assessed 477 MRI scans of the lumbar spine with a sagittal localizer sequence on the whole spine for numbering vertebrae caudally from C2. Proximal insertion of the psoas was determined as the most proximal vertebra with psoas over half of its body on coronal T2 STIR sequence...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413961/obituary-for-professor-ian-isherwood
#6
EDITORIAL
Alan Jackson
No abstract text is available yet for this article.
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413960/detection-of-intralabyrinthine-abnormalities-using-post-contrast-delayed-3d-flair-mri-sequences-in-patients-with-acute-vestibular-syndrome
#7
Michael Eliezer, Charles Maquet, Julien Horion, André Gillibert, Michel Toupet, Benoit Bolognini, Nicolas Magne, Laureline Kahn, Charlotte Hautefort, Arnaud Attyé
PURPOSE: 3D-FLAIR sequences with delayed acquisition after contrast medium injection have demonstrated new insights into blood-labyrinthine barrier (BLB) abnormalities in various diseases. The aim of this study was to assess the BLB in patients referred with unilateral acute vestibular syndrome (UAVS). MATERIALS AND METHODS: In this retrospective multicenter imaging study, we performed 3D-FLAIR and steady-state free precession (SSFP) sequences 4 h after contrast medium administration in 26 healthy volunteers and in 30 patients with UAVS...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413959/preoperative-radiomic-signature-based-on-multiparametric-magnetic-resonance-imaging-for-noninvasive-evaluation-of-biological-characteristics-in-rectal-cancer
#8
Xiaochun Meng, Wei Xia, Peiyi Xie, Rui Zhang, Wenru Li, Mengmeng Wang, Fei Xiong, Yangchuan Liu, Xinjuan Fan, Yao Xie, Xiangbo Wan, Kangshun Zhu, Hong Shan, Lei Wang, Xin Gao
OBJECTIVES: To develop and validate radiomic models in evaluating biological characteristics of rectal cancer based on multiparametric magnetic resonance imaging (MP-MRI). METHODS: This study consisted of 345 patients with rectal cancer who underwent MP-MRI. We focused on evaluating five postoperative confirmed characteristics: lymph node (LN) metastasis, tumor differentiation, fraction of Ki-67-positive tumor cells, human epidermal growth factor receptor 2 (HER-2), and KRAS-2 gene mutation status...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413958/soft-tissue-sarcoma-adding-diffusion-weighted-imaging-improves-mr-imaging-evaluation-of-tumor-margin-infiltration
#9
Ji Hyun Hong, Won-Hee Jee, Chan-Kwon Jung, Joon-Yong Jung, Seung Han Shin, Yang-Guk Chung
PURPOSE: To determine the added value of diffusion-weighted imaging (DWI) to conventional magnetic resonance (MR) imaging in assessment of tumor margin infiltration in soft tissue sarcoma (STS) at 3T. MATERIALS AND METHODS: The institutional review board approved this retrospective study. Forty-five patients who underwent 3T MR imaging including DWI and were pathologically confirmed were included in this study. Two readers retrospectively scored conventional MR imaging alone...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413957/whole-body-mri-to-assess-bone-involvement-in-prostate-cancer-and-multiple-myeloma-comparison-of-the-diagnostic-accuracies-of-the-t1-short-tau-inversion-recovery-stir-and-high-b-values-diffusion-weighted-imaging-dwi-sequences
#10
Ahmed Larbi, Patrick Omoumi, Vassiliki Pasoglou, Nicolas Michoux, Perrine Triqueneaux, Bertrand Tombal, Catherine Cyteval, Frédéric E Lecouvet
PURPOSE: To compare the diagnostic accuracy of whole-body T1, short tau inversion recovery (STIR), high b-value diffusion-weighted imaging (DWI), and sequence combinations to detect bone involvement in prostate cancer (PCa) and multiple myeloma (MM) patients. MATERIALS AND METHODS: We included 50 consecutive patients with PCa at high risk for metastasis and 47 consecutive patients with a histologically confirmed diagnosis of MM who received whole-body MRI at two institutions from January to December 2015...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413956/image-quality-and-diagnostic-accuracy-of-coronary-ct-angiography-derived-from-low-dose-dynamic-ct-myocardial-perfusion-a-feasibility-study-with-comparison-to-invasive-coronary-angiography
#11
Xu Dai, Mengmeng Yu, Jingwei Pan, Zhigang Lu, Chengxing Shen, Yining Wang, Bin Lu, Jiayin Zhang
OBJECTIVES: To investigate the diagnostic performance of coronary CT angiography derived from dynamic CT myocardial perfusion imaging (CCTACT-MPI ) by third-generation dual-source CT with reference to invasive coronary angiography (ICA). MATERIALS AND METHODS: Patients with acute myocardial infarction and those who received successful reperfusion treatment were prospectively enrolled. Emergent ICA findings were used as the reference standard to assess the diagnostic performance of CCTACT-MPI for detection of significant coronary stenosis (diameter stenosis ≥ 50%)...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413955/mri-radiomics-analysis-for-predicting-preoperative-synchronous-distant-metastasis-in-patients-with-rectal-cancer
#12
Huanhuan Liu, Caiyuan Zhang, Lijun Wang, Ran Luo, Jinning Li, Hui Zheng, Qiufeng Yin, Zhongyang Zhang, Shaofeng Duan, Xin Li, Dengbin Wang
OBJECTIVES: To investigate the value of MRI radiomics based on T2-weighted (T2W) images in predicting preoperative synchronous distant metastasis (SDM) in patients with rectal cancer. METHODS: This retrospective study enrolled 177 patients with histopathology-confirmed rectal adenocarcinoma (123 patients in the training cohort and 54 in the validation cohort). A total of 385 radiomics features were extracted from pretreatment T2W images. Five steps, including univariate statistical tests and a random forest algorithm, were performed to select the best preforming features for predicting SDM...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413954/reply-to-letter-to-the-editor-use-of-artificial-neural-networks-to-predict-anterior-communicating-artery-aneurysm-rupture-possible-methodological-issues
#13
LETTER
Jinjin Liu, Yunjun Yang, Bing Zhao
No abstract text is available yet for this article.
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413953/assessment-of-renal-function-before-contrast-media-injection-right-decisions-based-on-inaccurate-estimates
#14
Václav Ptáčník, David Zogala, Daniela Skibová, Hana Jiskrová, Jiří Trnka, Vladimír Tesař, Romana Ryšavá, Martin Šámal
OBJECTIVES: Information on renal function required before specified radiological examinations with contrast agents is usually obtained through prediction equations using serum creatinine and anthropometric data. The aim of our study was to demonstrate discrepancy between poor prediction and good diagnostic accuracy of glomerular filtration rate (GFR) estimated by prediction equations. METHODS: In 50 patients, reference GFR was measured as plasma clearance of 51-chromium labeled ethylene-diamine-tetraacetic-acid (51 Cr-EDTA) and compared with GFR assayed by creatinine clearance (CC) and estimated by Cockcroft-Gault prediction equation (CG)...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413952/use-of-artificial-neural-networks-to-predict-anterior-communicating-artery-aneurysm-rupture-possible-methodological-considerations
#15
LETTER
Guido Adriaan de Jong, René Aquarius
Use of algorithms to generate synthetic cases might result in a misrepresentation of the entire population. Training an artificial neural network with a mix of real and synthetic data might lead to non-realistic prediction precision.
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30413951/standardized-assessment-of-the-signal-intensity-increase-on-unenhanced-t1-weighted-images-in-the-brain-the-european-gadolinium-retention-evaluation-consortium-grec-task-force-position-statement
#16
Carlo C Quattrocchi, Joana Ramalho, Aart J van der Molen, Àlex Rovira, Alexander Radbruch
After the initial report in 2014 on T1-weighted (T1w) hyperintensity of deep brain nuclei following serial injections of linear gadolinium-based contrast agents (GBCAs), a multitude of studies on the potential of the marketed GBCAs to cause T1w hyperintensity in the brain have been published. The vast majority of these studies found a signal intensity (SI) increase for linear GBCAs in the brain-first and foremost in the dentate nucleus-while no SI increase was found for macrocyclic GBCAs. However, the scientific debate about this finding is kept alive by the fact that SI differences do not unequivocally represent the amount of gadolinium retained...
November 9, 2018: European Radiology
https://www.readbyqxmd.com/read/30406313/predicting-the-grade-of-hepatocellular-carcinoma-based-on-non-contrast-enhanced-mri-radiomics-signature
#17
Minghui Wu, Hongna Tan, Fei Gao, Jinjin Hai, Peigang Ning, Jian Chen, Shaocheng Zhu, Meiyun Wang, Shewei Dou, Dapeng Shi
PURPOSE: This study was conducted in order to investigate the value of magnetic resonance imaging (MRI)-based radiomics signatures for the preoperative prediction of hepatocellular carcinoma (HCC) grade. METHODS: Data from 170 patients confirmed to have HCC by surgical pathology were divided into a training group (n = 125) and a test group (n = 45). The radiomics features of tumours based on both T1-weighted imaging (WI) and T2WI were extracted by using Matrix Laboratory (MATLAB), and radiomics signatures were generated using the least absolute shrinkage and selection operator (LASSO) logistic regression model...
November 7, 2018: European Radiology
https://www.readbyqxmd.com/read/30406312/dual-energy-ct-for-liver-iron-quantification-in-patients-with-haematological-disorders
#18
Sebastian Werner, Bernhard Krauss, Ulrike Haberland, Malte Bongers, Uwe Starke, Tamam Bakchoul, Sigrid Enkel, Konstantin Nikolaou, Marius Horger
OBJECTIVES: To retrospectively quantify liver iron content in haematological patients suspected of transfusional haemosiderosis using dual-energy CT (DECT) and correlate with serum ferritin levels and estimated quantity of transfused iron. METHODS: One hundred forty-seven consecutive dual-source dual-energy non-contrast chest-CTs in 110 haematologic patients intended primarily for exclusion of pulmonary infection between September 2016 and June 2017 were retrospectively evaluated...
November 7, 2018: European Radiology
https://www.readbyqxmd.com/read/30406311/predictive-value-of-sarcopenia-and-visceral-obesity-for-postoperative-pancreatic-fistula-after-pancreaticoduodenectomy-analyzed-on-clinically-acquired-ct-and-mri
#19
Minji Jang, Hyung Woo Park, Jimi Huh, Jong Hwa Lee, Yoong Ki Jeong, Yang Won Nah, Jisuk Park, Kyung Won Kim
OBJECTIVE: To evaluate predictive values of sarcopenia and visceral obesity measured from preoperative CT/MRIs for postoperative pancreatic fistula (POPF) after pancreaticoduodenectomy in patients with periampullary malignancies. METHODS: From the prospectively constructed surgical registry, we included adult patients treated with pancreaticoduodenectomy. Based on CT/MRIs, body morphometric analysis was performed to evaluate the visceral obesity and sarcopenia, based on the areas of visceral fat and skeletal muscle measured at the L3 vertebrae level...
November 7, 2018: European Radiology
https://www.readbyqxmd.com/read/30406310/prognostic-value-of-a-new-semiquantitative-score-system-for-adenosine-stress-myocardial-perfusion-by-cmr
#20
Sonia Gómez-Revelles, Xavier Rossello, José Díaz-Villanueva, Ignacio López-Lima, Esteban Sciarresi, Mariano Estofán, Francesc Carreras, Sandra Pujadas, Guillem Pons-Lladó
OBJECTIVES: Cardiovascular magnetic resonance (CMR) provides information on myocardial ischemia through stress perfusion studies. In clinical practice, the grading of induced perfusion defects is performed by visual estimation of their extension. The aim of our study is to devise a score of the degree of ischemia and to test its prognostic value. METHODS: Between 2009 and 2011, patients with diagnosed or suspected coronary artery disease underwent stress perfusion CMR...
November 7, 2018: European Radiology
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