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European Radiology

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https://www.readbyqxmd.com/read/28540482/linear-sign-in-cystic-brain-lesions-%C3%A2-5-mm-a-suggestive-feature-of-perivascular-space
#1
Jinkyeong Sung, Jinhee Jang, Hyun Seok Choi, So-Lyung Jung, Kook-Jin Ahn, Bum-Soo Kim
OBJECTIVE: To determine the prevalence of a linear sign within enlarged perivascular space (EPVS) and chronic lacunar infarction (CLI) ≥ 5 mm on T2-weighted imaging (T2WI) and time-of-flight (TOF) magnetic resonance angiography (MRA), and to evaluate the diagnostic value of the linear signs for EPVS over CLI. METHODS: This study included 101 patients with cystic lesions ≥ 5 mm on brain MRI including TOF MRA. After classification of cystic lesions into EPVS or CLI, two readers assessed linear signs on T2WI and TOF MRA...
May 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28540481/impact-of-perfusion-lesion-in-corticospinal-tract-on-response-to-reperfusion
#2
Ying Zhou, Ruiting Zhang, Sheng Zhang, Shenqiang Yan, Ze Wang, Bruce C V Campbell, David S Liebeskind, Min Lou
OBJECTIVES: We aimed to examine the impact of corticospinal tract (CST) involvement in acute ischaemic stroke (AIS) patients on functional outcome and the interaction with reperfusion. METHODS: We retrospectively examined data in consecutive anterior circulation AIS patients undergoing thrombolysis. MR perfusion (time to maximum of tissue residue function, Tmax) and apparent diffusion coefficient (ADC) images were transformed into standard space and the volumes of CST involvement by Tmax > 6 s (CST-Tmax) and ADC < 620 × 10(-6) mm(2)/s (CST-ADC) lesions were calculated...
May 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28540480/the-effect-of-four-phasic-versus-three-phasic-contrast-media-injection-protocols-on-extravasation-rate-in-coronary-ct-angiography-a-randomized-controlled-trial
#3
Júlia Karády, Alexisz Panajotu, Márton Kolossváry, Bálint Szilveszter, Ádám L Jermendy, Andrea Bartykowszki, Mihály Károlyi, Csilla Celeng, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVES: Contrast media (CM) extravasation is a well-known complication of CT angiography (CTA). Our prospective randomized control study aimed to assess whether a four-phasic CM administration protocol reduces the risk of extravasation compared to the routinely used three-phasic protocol in coronary CTA. METHODS: Patients referred to coronary CTA due to suspected coronary artery disease were included in the study. All patients received 400 mg/ml iomeprol CM injected with dual-syringe automated injector...
May 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28534164/an-evaluation-of-patient-experience-during-percutaneous-breast-biopsy
#4
Jean M Seely, Fraser Hill, Susan Peddle, Jackie Lau
OBJECTIVE: Percutaneous breast biopsy in a tertiary referral high volume breast centre: can we improve the patient experience? PURPOSE: The study was performed to evaluate patient experience during ultrasound-guided (UGB) and vacuum-assisted stereotactic breast biopsy (SBB) and determine what factors could improve the patient experience. METHODS: Consecutive patients who underwent image guided breast biopsy from 01- 05/30, 2015 were approached in a structured telephone interview to evaluate pain and bruising from the procedure...
May 22, 2017: European Radiology
https://www.readbyqxmd.com/read/28534163/differentiating-metastatic-from-nonmetastatic-lymph-nodes-in-cervical-cancer-patients-using-monoexponential-biexponential-and-stretched-exponential-diffusion-weighted-mr-imaging
#5
Qingxia Wu, Dandan Zheng, Ligang Shi, Mingbo Liu, Meiyun Wang, Dapeng Shi
OBJECTIVES: To determine the diagnostic value of monoexponential, biexponential and stretched exponential models for identifying lymph nodes (LNs) in patients with cervical cancer. MATERIALS AND METHODS: Fifty female patients with cervical cancer underwent preoperative magnetic resonance imaging. The diffusion parameters of the LNs were calculated by fitting the values to monoexponential, biexponential and stretched exponential models and were compared between the metastatic and non-metastatic LN groups...
May 22, 2017: European Radiology
https://www.readbyqxmd.com/read/28534162/applying-protein-based-amide-proton-transfer-mr-imaging-to-distinguish-solitary-brain-metastases-from-glioblastoma
#6
Hao Yu, Huiling Lou, Tianyu Zou, Xianlong Wang, Shanshan Jiang, Zhongqing Huang, Yongxing Du, Chunxiu Jiang, Ling Ma, Jianbin Zhu, Wen He, Qihong Rui, Jianyuan Zhou, Zhibo Wen
OBJECTIVES: To determine the utility of amide proton transfer-weighted (APTw) MR imaging in distinguishing solitary brain metastases (SBMs) from glioblastomas (GBMs). METHODS: Forty-five patients with SBMs and 43 patients with GBMs underwent conventional and APT-weighted sequences before clinical intervention. The APTw parameters and relative APTw (rAPTw) parameters in the tumour core and the peritumoral brain zone (PBZ) were obtained and compared between SBMs and GBMs...
May 22, 2017: European Radiology
https://www.readbyqxmd.com/read/28526893/do-we-need-3d-tube-current-modulation-information-for-accurate-organ-dosimetry-in-chest-ct-protocols-dose-comparisons
#7
Xochitl Lopez-Rendon, Guozhi Zhang, Walter Coudyzer, Wim Develter, Hilde Bosmans, Federica Zanca
OBJECTIVES: To compare the lung and breast dose associated with three chest protocols: standard, organ-based tube current modulation (OBTCM) and fast-speed scanning; and to estimate the error associated with organ dose when modelling the longitudinal (z-) TCM versus the 3D-TCM in Monte Carlo simulations (MC) for these three protocols. METHOD: Five adult and three paediatric cadavers with different BMI were scanned. The CTDIvol of the OBTCM and the fast-speed protocols were matched to the patient-specific CTDIvol of the standard protocol...
May 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28526892/stereotactic-core-needle-breast-biopsy-marker-migration-an-analysis-of-factors-contributing-to-immediate-marker-migration
#8
Ashali Jain, Maria Khalid, Muhammad M Qureshi, Dianne Georgian-Smith, Jonah A Kaplan, Karen Buch, Mark W Grinstaff, Ariel E Hirsch, Neely L Hines, Stephan W Anderson, Katherine M Gallagher, David D B Bates, B Nicolas Bloch
OBJECTIVES: To evaluate breast biopsy marker migration in stereotactic core needle biopsy procedures and identify contributing factors. METHODS: This retrospective study analyzed 268 stereotactic biopsy markers placed in 263 consecutive patients undergoing stereotactic biopsies using 9G vacuum-assisted devices from August 2010-July 2013. Mammograms were reviewed and factors contributing to marker migration were evaluated. Basic descriptive statistics were calculated and comparisons were performed based on radiographically-confirmed marker migration...
May 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28523355/mri-findings-in-men-on-active-surveillance-for-prostate-cancer-does-dutasteride-make-mri-visible-lesions-less-conspicuous-results-from-a-placebo-controlled-randomised-clinical-trial
#9
Francesco Giganti, Caroline M Moore, Nicola L Robertson, Neil McCartan, Charles Jameson, Simon R J Bott, Mathias Winkler, Giulio Gambarota, Brandon Whitcher, Ramiro Castro, Mark Emberton, Clare Allen, Alex Kirkham
OBJECTIVES: To investigate changes in the Apparent Diffusion Coefficient (ADC) using diffusion-weighted imaging (DWI) in men on active surveillance for prostate cancer taking dutasteride 0.5 mg or placebo. METHODS: We analysed 37 men, randomised to 6 months of daily dutasteride (n = 18) or placebo (n = 19), undergoing 3T multi-parametric Magnetic Resonance Imaging (mpMRI) scans at baseline and 6 months. Images were reviewed blind to treatment allocation and clinical information...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523354/investigation-of-reference-levels-and-radiation-dose-associated-with-abdominal-evar-endovascular-aneurysm-repair-procedures-across-several-european-centres
#10
E Tuthill, L O'Hora, M O'Donohoe, S Panci, P Gilligan, D Campion, R Trenti, E Fox, D Catania, L Rainford
OBJECTIVES: Endovascular aneurysm repair (EVAR) is considered the treatment of choice for abdominal aortic aneurysms with suitable anatomy. In order to improve radiation safety, European Directive (2013/59) requires member states to implement diagnostic reference levels (DRLs) in radio-diagnostic and interventional procedures. This study aimed to determine local DRLs for EVAR across five European centres and identify an interim European DRL, which currently remains unestablished. METHODS: Retrospective data was collected for 180 standard EVARs performed between January 2014 and July 2015 from five specialist centres in Ireland (n=2) and Italy (n=3)...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523353/evaluation-of-renal-cell-carcinoma-histological-subtype-and-fuhrman-grade-using-18-f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography
#11
Reiko Nakajima, Sayumi Nozaki, Tsunenori Kondo, Yoji Nagashima, Koichiro Abe, Shuji Sakai
OBJECTIVES: We evaluated (18)F-fluorodeoxyglucose (FDG) uptake by renal cell carcinomas (RCCs) to determine whether different histological subtypes and Fuhrman grades can be distinguished. METHODS: We retrospectively reviewed the records and maximum standardised uptake value (SUVmax) of 147 patients with 154 RCCs who underwent FDG-positron emission tomography (PET)/computed tomography (CT) prior to tumour resection. RESULTS: The SUVmax was significantly lower in chromophobe RCC (chRCC) tumours than in clear cell RCC (ccRCC; p = 0...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523352/interim-heterogeneity-changes-measured-using-entropy-texture-features-on-t2-weighted-mri-at-3-0%C3%A2-t-are-associated-with-pathological-response-to-neoadjuvant-chemotherapy-in-primary-breast-cancer
#12
Shelley Henderson, Colin Purdie, Caroline Michie, Andrew Evans, Richard Lerski, Marilyn Johnston, Sarah Vinnicombe, Alastair M Thompson
OBJECTIVES: To investigate whether interim changes in hetereogeneity (measured using entropy features) on MRI were associated with pathological residual cancer burden (RCB) at final surgery in patients receiving neoadjuvant chemotherapy (NAC) for primary breast cancer. METHODS: This was a retrospective study of 88 consenting women (age: 30-79 years). Scanning was performed on a 3.0 T MRI scanner prior to NAC (baseline) and after 2-3 cycles of treatment (interim)...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523351/severity-specific-alterations-in-cbf-oef-and-cmro2-in-cirrhotic-patients-with-hepatic-encephalopathy
#13
Gang Zheng, Hanzhang Lu, Wenkui Yu, Song Luo, Ya Liu, Wei Liu, Hui Liu, Long Wu, Lijuan Zheng, Xiang Kong, Long Jiang Zhang, Guang Ming Lu
OBJECTIVES: To assess how the severity of hepatic encephalopathy (HE) affects perfusion and metabolic changes in cirrhotic patients and the association between severity and liver disease and anemia. METHODS: The study groups comprised 31 healthy subjects and 33 cirrhotic patients who underwent MR examinations, and blood and neuropsychological tests. Of the cirrhotic patients, 14 were unaffected, and 11 had covert HE (CHE) and 8 overt HE (OHE). Global cerebral blood flow (CBF), oxygen extraction fraction (OEF), and metabolic rate of oxygen (CMRO2) were noninvasively measured by phase-contrast and T2-relaxation-under-spin-tagging MRI...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523350/comparison-of-a-radiomic-biomarker-with-volumetric-analysis-for-decoding-tumour-phenotypes-of-lung-adenocarcinoma-with-different-disease-specific-survival
#14
Mei Yuan, Yu-Dong Zhang, Xue-Hui Pu, Yan Zhong, Hai Li, Jiang-Fen Wu, Tong-Fu Yu
OBJECTIVES: To compare a multi-feature-based radiomic biomarker with volumetric analysis in discriminating lung adenocarcinomas with different disease-specific survival on computed tomography (CT) scans. METHODS: This retrospective study obtained institutional review board approval and was Health Insurance Portability and Accountability Act (HIPAA) compliant. Pathologically confirmed lung adenocarcinoma (n = 431) manifested as subsolid nodules on CT were identified...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28523349/diagnosis-of-bronchiectasis-and-airway-wall-thickening-in-children-with-cystic-fibrosis-objective-airway-artery-quantification
#15
Wieying Kuo, Marleen de Bruijne, Jens Petersen, Kazem Nasserinejad, Hadiye Ozturk, Yong Chen, Adria Perez-Rovira, Harm A W M Tiddens
OBJECTIVES: To quantify airway and artery (AA)-dimensions in cystic fibrosis (CF) and control patients for objective CT diagnosis of bronchiectasis and airway wall thickness (AWT). METHODS: Spirometer-guided inspiratory and expiratory CTs of 11 CF and 12 control patients were collected retrospectively. Airway pathways were annotated semi-automatically to reconstruct three-dimensional bronchial trees. All visible AA-pairs were measured perpendicular to the airway axis...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28500370/long-term-prognostic-performance-of-low-dose-coronary-computed-tomography-angiography-with-prospective-electrocardiogram-triggering
#16
Olivier F Clerc, Basil P Kaufmann, Mathias Possner, Riccardo Liga, Jan Vontobel, Fran Mikulicic, Christoph Gräni, Dominik C Benz, Tobias A Fuchs, Julia Stehli, Aju P Pazhenkottil, Oliver Gaemperli, Philipp A Kaufmann, Ronny R Buechel
OBJECTIVES: To assess long-term prognosis after low-dose 64-slice coronary computed tomography angiography (CCTA) using prospective electrocardiogram-triggering. METHODS: We included 434 consecutive patients with suspected or known coronary artery disease referred for low-dose CCTA. Patients were classified as normal, with non-obstructive or obstructive lesions, or previously revascularized. Coronary artery calcium score (CACS) was assessed in 223 patients. Follow-up was obtained regarding major adverse cardiac events (MACE): cardiac death, myocardial infarction and elective revascularization...
May 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28500369/feature-tracking-myocardial-strain-analysis-in-acute-myocarditis-diagnostic-value-and-association-with-myocardial-oedema
#17
Julian A Luetkens, Ulrike Schlesinger-Irsch, Daniel L Kuetting, Darius Dabir, Rami Homsi, Jonas Doerner, Frederic C Schmeel, Rolf Fimmers, Alois M Sprinkart, Claas P Naehle, Hans H Schild, Daniel Thomas
OBJECTIVES: To investigate the diagnostic value of cardiac magnetic resonance (CMR) feature-tracking (FT) myocardial strain analysis in patients with suspected acute myocarditis and its association with myocardial oedema. METHODS: Forty-eight patients with suspected acute myocarditis and 35 control subjects underwent CMR. FT CMR analysis of systolic longitudinal (LS), circumferential (CS) and radial strain (RS) was performed. Additionally, the protocol allowed for the assessment of T1 and T2 relaxation times...
May 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28500368/advanced-myocardial-tissue-characterisation-by-a-multi-component-cmr-protocol-in-patients-with-rheumatoid-arthritis
#18
Simon Greulich, Agnes Mayr, Daniel Kitterer, Joerg Latus, Joerg Henes, Francesco Vecchio, Philipp Kaesemann, Alexandru Patrascu, Andreas Greiser, Stefan Groeninger, Francesco Romeo, Niko Braun, M Dominik Alscher, Udo Sechtem, Heiko Mahrholdt
OBJECTIVES: Rheumatoid arthritis (RA) patients are at increased risk of suffering from adverse cardiovascular events. Cardiovascular magnetic resonance (CMR) mapping techniques might be appropriate tools to complement late gadolinium enhancement (LGE) for the assessment of myocardial involvement. This study aimed to perform advanced myocardial tissue characterisation in RA patients by a multicomponent CMR protocol. METHODS: 22 RA patients were prospectively enrolled and underwent CMR, including LGE and T1/T2 mapping sequences; 20 volunteers served as controls...
May 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28500367/evolution-of-posterior-fossa-and-brain-morphology-after-in-utero-repair-of-open-neural-tube-defects-assessed-by-mri
#19
Christin Rethmann, Ianina Scheer, Martin Meuli, Luca Mazzone, Ueli Moehrlen, Christian Johannes Kellenberger
OBJECTIVES: To describe characteristics of foetuses undergoing in utero repair of open neural tube defects (ONTD) and assess postoperative evolution of posterior fossa and brain morphology. METHODS: Analysis of pre- and postoperative foetal as well as neonatal MRI of 27 foetuses who underwent in utero repair of ONTD. Type and level of ONTD, hindbrain configuration, posterior fossa and liquor space dimensions, and detection of associated findings were compared between MRI studies and to age-matched controls...
May 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28500366/comparison-of-3d-magnetic-resonance-imaging-and-digital-subtraction-angiography-for-intracranial-artery-stenosis
#20
Ji Eun Park, Seung Chai Jung, Sang Hun Lee, Ji Young Jeon, Ji Ye Lee, Ho Sung Kim, Choong-Gon Choi, Sang Joon Kim, Deok Hee Lee, Seon-Ok Kim, Sun U Kwon, Dong-Wha Kang, Jong S Kim
OBJECTIVES: To compare three-dimensional high-resolution magnetic resonance imaging (3D HR-MRI) and digital subtraction angiography (DSA) for diagnosing and evaluating stenosis in the entire circle of Willis. METHODS: The study included 516 intracranial arteries from 43 patients with intracranial artery stenosis (ICAS) who underwent both 3D HR-MRI and DSA within 1 month. Two readers independently diagnosed atherosclerosis, dissection, moyamoya disease and vasculitis, rated their diagnostic confidence for each vessel and measured the luminal diameters...
May 12, 2017: European Radiology
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