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European Radiology

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https://www.readbyqxmd.com/read/29164384/comparison-of-gradient-recalled-echo-and-spin-echo-echo-planar-imaging-mr-elastography-in-staging-liver-fibrosis-a-meta-analysis
#1
Yong Seek Kim, Yu Na Jang, Ji Soo Song
OBJECTIVES: To compare the diagnostic performance of gradient-recalled echo-based magnetic resonance elastography (GRE-MRE) and spin-echo echo-planar imaging-based MRE (SE-EPI-MRE) in liver fibrosis staging. METHODS: A systematic literature search was performed to identify studies involving the performance of MRE for the diagnosis of liver fibrosis. Pooled sensitivity, specificity, positive and negative likelihood ratios, the diagnostic odds ratio, and a summary receiver operating characteristic (ROC) curve were estimated by using a bivariate random effects model...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29164383/image-quality-and-radiation-dose-of-coronary-ct-angiography-performed-with-whole-heart-coverage-ct-scanner-with-intra-cycle-motion-correction-algorithm-in-patients-with-atrial-fibrillation
#2
Daniele Andreini, Gianluca Pontone, Saima Mushtaq, Maria Elisabetta Mancini, Edoardo Conte, Marco Guglielmo, Valentina Volpato, Andrea Annoni, Andrea Baggiano, Alberto Formenti, Valentina Ditali, Marco Perchinunno, Cesare Fiorentini, Antonio L Bartorelli, Mauro Pepi
OBJECTIVES: To evaluate image quality, coronary evaluability and radiation exposure of coronary CT angiography (CCTA) performed with whole-heart coverage cardiac-CT in patients with atrial fibrillation (AF). MATERIALS AND METHODS: We prospectively enrolled 164 patients with AF who underwent a clinically indicated CCTA with a 16-cm z-axis coverage scanner. In all patients CCTA was performed using prospective ECG-triggering with targeted RR interval. We evaluated image quality, coronary evaluability and effective dose (ED)...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29164382/ct-texture-features-of-liver-parenchyma-for-predicting-development-of-metastatic-disease-and-overall-survival-in-patients-with-colorectal-cancer
#3
Scott J Lee, Ryan Zea, David H Kim, Meghan G Lubner, Dustin A Deming, Perry J Pickhardt
OBJECTIVES: To determine if identifiable hepatic textural features are present at abdominal CT in patients with colorectal cancer (CRC) prior to the development of CT-detectable hepatic metastases. METHODS: Four filtration-histogram texture features (standard deviation, skewness, entropy and kurtosis) were extracted from the liver parenchyma on portal venous phase CT images at staging and post-treatment surveillance. Surveillance scans corresponded to the last scan prior to the development of CT-detectable CRC liver metastases in 29 patients (median time interval, 6 months), and these were compared with interval-matched surveillance scans in 60 CRC patients who did not develop liver metastases...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29164381/assessment-of-micro-dose-biplanar-radiography-in-lower-limb-measurements-in-children
#4
Héloïse Lerisson, Élisa Amzallag-Bellenger, Aurélie Cebulski-Delebarre, Eric Nectoux, Geoffrey Desmulliez, Alain Duhamel, Elodie Drumez, Bernard Herbaux, Nathalie Boutry
OBJECTIVES: To evaluate in children microdose protocol compared with low dose for lower limb alignment (LLA) measurements on biplanar radiography. METHODS: Children 6 years or older were included. Height, weight and hip width were measured prior to imaging. Hip width allowed classifying children into morphotype M1 (width <25 cm), M2 (25-35 cm) or M3 (>35 cm) corresponding to predefined acquisition parameters (kV, mA, tube speed). Micro- and low-dose protocols were used alternately, with simultaneous acquisition of frontal and lateral radiographs...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29164380/correlation-between-the-availability-of-dopamine-transporter-and-olfactory-function-in-healthy-subjects
#5
Kyoungjune Pak, Keunyoung Kim, Myung Jun Lee, Jae Meen Lee, Bum Soo Kim, Seong-Jang Kim, In Joo Kim
OBJECTIVES: Olfactory dysfunction in Parkinson's disease is usually prodromal to other symptoms. In this study, we aimed to explore the association of olfactory function with the availabilities of striatal dopamine transporter (DAT) in healthy subjects. METHODS: Data used in the preparation of this article were obtained from Parkinson's Progression Markers Initiative database ( www.ppmi-info.org/data ). The study population consisted of healthy controls with screening (123)I-FP-CIT single photon emission tomography (SPECT)...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29147768/non-invasive-methods-for-estimating-mpap-in-copd-using-cardiovascular-magnetic-resonance-imaging
#6
C S Johns, S Rajaram, D A Capener, C Oram, C Elliot, R Condliffe, D G Kiely, J M Wild, A J Swift
PURPOSE: Pulmonary hypertension (PH) is associated with a poor outcome in chronic obstructive pulmonary disease (COPD) and is diagnosed invasively. We aimed to assess the diagnostic accuracy and prognostic value of non-invasive cardiovascular magnetic resonance (CMR) models. METHODS: Patients with COPD and suspected PH, who underwent CMR and right heart catheter (RHC) were identified. Three candidate models were assessed: 1, CMR-RV model, based on right ventricular (RV) mass and interventricular septal angle; 2, CMR PA/RV includes RV mass, septal angle and pulmonary artery (PA) measurements; 3, the Alpha index, based on RV ejection fraction and PA size...
November 16, 2017: European Radiology
https://www.readbyqxmd.com/read/29143940/histogram-analysis-of-diffusion-kurtosis-imaging-derived-maps-may-distinguish-between-low-and-high-grade-gliomas-before-surgery
#7
Xi-Xun Qi, Da-Fa Shi, Si-Xie Ren, Su-Ya Zhang, Long Li, Qing-Chang Li, Li-Ming Guan
OBJECTIVE: To investigate the value of histogram analysis of diffusion kurtosis imaging (DKI) maps in the evaluation of glioma grading. METHODS: A total of 39 glioma patients who underwent preoperative magnetic resonance imaging (MRI) were classified into low-grade (13 cases) and high-grade (26 cases) glioma groups. Parametric DKI maps were derived, and histogram metrics between low- and high-grade gliomas were analysed. The optimum diagnostic thresholds of the parameters, area under the receiver operating characteristic curve (AUC), sensitivity, and specificity were achieved using a receiver operating characteristic (ROC)...
November 16, 2017: European Radiology
https://www.readbyqxmd.com/read/29143939/in-memoriam-prof-erik-boijsen
#8
EDITORIAL
Olle Ekberg, Peter Aspelin, Stanley Baum
No abstract text is available yet for this article.
November 16, 2017: European Radiology
https://www.readbyqxmd.com/read/29143106/nonsuppressing-normal-thymus-on-chemical-shift-mr-imaging-and-anterior-mediastinal-lymphoma-differentiation-with-diffusion-weighted-mr-imaging-by-using-the-apparent-diffusion-coefficient
#9
Adriano Massimiliano Priola, Sandro Massimo Priola, Dario Gned, Maria Teresa Giraudo, Andrea Veltri
OBJECTIVES: To prospectively evaluate usefulness of the apparent diffusion coefficient (ADC) in differentiating anterior mediastinal lymphoma from nonsuppressing normal thymus on chemical-shift MR, and to look at the relationship between patient age and ADC. METHODS: Seventy-three young subjects (25 men, 48 women; age range, 9-29 years), who underwent chemical-shift MR and diffusion-weighted MR were divided into a normal thymus group (group A, 40 subjects), and a lymphoma group (group B, 33 patients)...
November 15, 2017: European Radiology
https://www.readbyqxmd.com/read/29143105/application-of-dwibs-in-malignant-lymphoma-correlation-between-adc-values-and-ki-67-index
#10
Mengtian Sun, Jingliang Cheng, Yong Zhang, Jie Bai, Feifei Wang, Yun Meng, Zhenqian Li
OBJECTIVES: We investigated the correlation between the apparent diffusion coefficient (ADC) and Ki-67 index using diffusion-weighted whole-body imaging with background body signal suppression (DWIBS), and their utility in evaluating malignant lymphoma cell proliferation. MATERIALS AND METHODS: Seventy-four patients with malignant lymphoma underwent DWIBS within 1 week before pathological confirmation. The ADC value was measured at the site of the pathological examination, and specimens were also stained with Ki-67...
November 15, 2017: European Radiology
https://www.readbyqxmd.com/read/29138880/morphological-classification-of-intraductal-papillary-neoplasm-of-the-bile-duct
#11
Shihong Ying, Mingliang Ying, Wenjie Liang, Zhaoming Wang, Qidong Wang, Feng Chen, Wenbo Xiao
OBJECTIVES: To investigate the morphological classification of intraductal papillary neoplasm of the bile duct (IPNB), as well as morphological differences between IPNB without mucin secretion (IPNB-NM) and IPNB with mucin secretion (IPMN-B). METHODS: Eighty-one patients with IPNB were retrospectively analysed. Imaging examinations included computed tomography (CT), magnetic resonance imaging (MRI), gadolinium-ethoxybenzyl-diethylenetriaminepentaacetic acid (Gd-EOB-DTPA)-enhanced MRI and positron emission tomography-computed tomography (PET-CT)...
November 14, 2017: European Radiology
https://www.readbyqxmd.com/read/29134357/apparent-diffusion-coefficient-of-vertebral-haemangiomas-allows-differentiation-from-malignant-focal-deposits-in-whole-body-diffusion-weighted-mri
#12
Jessica M Winfield, Gabriele Poillucci, Matthew D Blackledge, David J Collins, Vallari Shah, Nina Tunariu, Martin F Kaiser, Christina Messiou
OBJECTIVES: The aim of this study was to identify apparent diffusion coefficient (ADC) values for typical haemangiomas in the spine and to compare them with active malignant focal deposits. METHODS: This was a retrospective single-institution study. Whole-body magnetic resonance imaging (MRI) scans of 106 successive patients with active multiple myeloma, metastatic prostate or breast cancer were analysed. ADC values of typical vertebral haemangiomas and malignant focal deposits were recorded...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134356/secretin-stimulated-ultrasound-estimation-of-pancreatic-secretion-in-cystic-fibrosis-validated-by-magnetic-resonance-imaging
#13
Trond Engjom, Erling Tjora, Gaute Wathle, Friedemann Erchinger, Birger N Lærum, Odd H Gilja, Ingfrid Salvesen Haldorsen, Georg Dimcevski
OBJECTIVES: Secretin-stimulated magnetic resonance imaging (s-MRI) is the best validated radiological modality assessing pancreatic secretion. The purpose of this study was to compare volume output measures from secretin-stimulated transabdominal ultrasonography (s-US) to s-MRI for the diagnosis of exocrine pancreatic failure in cystic fibrosis (CF). METHODS: We performed transabdominal ultrasonography and MRI before and at timed intervals during 15 minutes after secretin stimulation in 21 CF patients and 13 healthy controls...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134355/extracellular-contrast-agent-enhanced-mri-15-min-delayed-phase-may-improve-the-diagnostic-performance-for-hepatocellular-carcinoma-in-patients-with-chronic-liver-disease
#14
Si Eun Lee, Chansik An, Shin Hye Hwang, Jin-Young Choi, Kyunghwa Han, Myeong-Jin Kim
OBJECTIVES: To determine the value of a 15-min delayed phase in extracellular contrast agent (ECA)-enhanced magnetic resonance imaging (MRI) for evaluation of hepatocellular carcinoma (HCC) in patients with chronic liver disease. METHODS: Between 2014 and 2015, 103 patients with chronic liver disease underwent ECA-enhanced MRI; 133 lesions consisting of 107 HCCs, 23 benign lesions and three non-HCC malignancies were identified with pathological or clinical diagnosis...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134354/conventional-and-synthetic-mri-in-multiple-sclerosis-a-comparative-study
#15
Wolfgang Krauss, Martin Gunnarsson, Margareta Nilsson, Per Thunberg
OBJECTIVES: To compare the assessment of patients with multiple sclerosis (MS) using synthetic and conventional MRI. MATERIALS AND METHODS: Synthetic and conventional axial images were prospectively acquired for 52 patients with diagnosed MS. Quantitative MRI (qMRI) was used for measuring proton density and relaxation times (T1, T2) and then, based on these parameters, synthetic T1W, T2W and FLAIR images were calculated. Image stacks were reviewed blindly, independently and in random order by two radiologists...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134353/scan-time-reduction-in-diffusion-weighted-imaging-of-the-pancreas-using-a-simultaneous-multislice-technique-with-different-acceleration-factors-how-fast-can-we-go
#16
Jana Taron, Petros Martirosian, Thomas Kuestner, Nina F Schwenzer, Ahmed Othman, Jakob Weiß, Mike Notohamiprodjo, Konstantin Nikolaou, Christina Schraml
OBJECTIVES: To investigate the feasibility of simultaneous multislice-accelerated diffusion-weighted imaging (sms-DWI) of the pancreas with different acceleration factors and its influence on image quality, acquisition time and apparent diffusion coefficients (ADCs) in comparison to conventional sequences. METHODS: DWI of the pancreas was performed at 1.5T in ten healthy volunteers and 20 patients with sms-accelerated echo-planar DWI using two different sms-acceleration factors of 2 and 3 (sms2/3-DWI)...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134352/accuracy-of-apparent-diffusion-coefficient-in-differentiating-pancreatic-neuroendocrine-tumour-from-intrapancreatic-accessory-spleen
#17
Ankur Pandey, Pallavi Pandey, Mounes Aliyari Ghasabeh, Farnaz Najmi Varzaneh, Pegah Khoshpouri, Nannan Shao, Manijeh Zargham Pour, Daniel Fadaei Fouladi, Ralph H Hruban, Anne Marie O'Broin-Lennon, Ihab R Kamel
OBJECTIVES: To evaluate and compare the accuracy of absolute apparent diffusion coefficient (ADC) and normalised ADC (lesion-to-spleen ADC ratio) in differentiating pancreatic neuroendocrine tumour (NET) from intrapancreatic accessory spleen (IPAS). METHODS: Study included 62 patients with the diagnosis of pancreatic NET (n=51) or IPAS (n=11). Two independent reviewers measured ADC on all lesions and spleen. Receiver operating characteristics (ROC) analysis to differentiate NET from IPAS was performed and compared for absolute and normalised ADC...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134351/3d-t2-weighted-imaging-to-shorten-multiparametric-prostate-mri-protocols
#18
Stephan H Polanec, Mathias Lazar, Georg J Wengert, Hubert Bickel, Claudio Spick, Martin Susani, Shahrokh Shariat, Paola Clauser, Pascal A T Baltzer
OBJECTIVES: To determine whether 3D acquisitions provide equivalent image quality, lesion delineation quality and PI-RADS v2 performance compared to 2D acquisitions in T2-weighted imaging of the prostate at 3 T. METHODS: This IRB-approved, prospective study included 150 consecutive patients (mean age 63.7 years, 35-84 years; mean PSA 7.2 ng/ml, 0.4-31.1 ng/ml). Two uroradiologists (R1, R2) independently rated image quality and lesion delineation quality using a five-point ordinal scale and assigned a PI-RADS score for 2D and 3D T2-weighted image data sets...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134350/subtraction-multiphase-ct-angiography-a-new-technique-for-faster-detection-of-intracranial-arterial-occlusions
#19
Danielle Byrne, John P Walsh, Gavin Sugrue, Emma Stanley, Michael Marnane, Cathal D Walsh, Peter Kelly, Sean Murphy, Eoin C Kavanagh, Peter J MacMahon
OBJECTIVE: To describe and evaluate a novel technical development to improve detection of intracranial vessel occlusions using multiphase CT angiography (MPCTA). MATERIALS AND METHODS: The institutional ethics committee approved the study. Fifty patients (30 consecutive distal (M2 or smaller) anterior circulation occlusions, ten M1 occlusions, ten cases without occlusion) presenting with suspected AIS who underwent MPCTA were included. Post-processing of MPCTA studies created "subtraction" and "delayed enhancement" (DE) datasets...
November 13, 2017: European Radiology
https://www.readbyqxmd.com/read/29134349/the-impact-of-mri-sequence-on-tumour-staging-and-gross-tumour-volume-delineation-in-squamous-cell-carcinoma-of-the-anal-canal
#20
Davide Prezzi, Ramin Mandegaran, Sofia Gourtsoyianni, Katarzyna Owczarczyk, Andrew Gaya, Robert Glynne-Jones, Vicky Goh
OBJECTIVES: To compare maximum tumour diameter (MTD) and gross tumour volume (GTV) measurements between T2-weighted (T2-w) and diffusion-weighted (DWI) MRI in squamous cell carcinoma of the anal canal (SCCA) and assess sequence impact on tumour (T) staging. Second, to evaluate interobserver agreement and reader delineation confidence. METHODS: The staging MRI scans of 45 SCCA patients (25 females) were assessed retrospectively by two independent radiologists (0 and 5 years' experience of anal cancer MRI)...
November 13, 2017: European Radiology
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