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European Radiology

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https://www.readbyqxmd.com/read/29789914/correlation-based-perfusion-mapping-using-time-resolved-mr-angiography-a-feasibility-study-for-patients-with-suspicions-of-steno-occlusive-craniocervical-arteries
#1
Yoonho Nam, Jinhee Jang, Sonya Youngju Park, Hyun Seok Choi, So-Lyung Jung, Kook-Jin Ahn, Bum-Soo Kim
PURPOSE: To explore the feasibility of using correlation-based time-delay (CTD) maps produced from time-resolved MR angiography (TRMRA) to diagnose perfusion abnormalities in patients suspected to have steno-occlusive lesions in the craniocervical arteries. MATERIALS AND METHODS: Twenty-seven patients who were suspected to have steno-occlusive lesions in the craniocervical arteries underwent both TRMRA and brain single-photon emission computed tomography (SPECT)...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789913/ethylene-vinyl-alcohol-copolymer-for-occlusion-of-specific-portal-branches-during-preoperative-portal-vein-embolisation-with-n-butyl-cyanoacrylate
#2
Romain Breguet, Sana Boudabbous, Lawrence F Pupulim, Christoph D Becker, Laura Rubbia-Brandt, Christian Toso, Maxime Ronot, Sylvain Terraz
OBJECTIVES: To evaluate the safety and efficacy of ethylene vinyl alcohol copolymer (EVOH) injection for selective occlusion of portal branches considered at risk for non-target embolisation during preoperative portal vein embolisation (PVE). METHODS: Twenty-nine patients (mean age, 57 ± 17 years) submitted to PVE with n-butyl-cyanoacrylate (NBCA) and additional EVOH for selected portal branches were retrospectively analysed. Indications for the use of EVOH and the selected portal branches were evaluated...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789912/meniscal-pathologies-on-mri-correlate-with-increased-bone-tracer-uptake-in-spect-ct
#3
Jan Rechsteiner, Michael T Hirschmann, Milos Dordevic, Anna L Falkowski, Enrique A Testa, Felix Amsler, Anna Hirschmann
OBJECTIVES: To assess the relationship of subchondral bone tracer uptake (BTU) on SPECT/CT and meniscal pathologies on MRI in patients with painful knees. METHODS: Twenty-five patients who had MRI and SPECT/CT within 3 months without knee surgery or grade ≥3 cartilage lesions were prospectively included. Maximum values of each subchondral femorotibial area were quantified and a ratio was calculated in relation to a femoral shaft reference region, which represented the BTU background activity...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789911/the-role-of-core-needle-biopsy-in-the-diagnosis-of-initially-detected-thyroid-nodules-a-systematic-review-and-meta-analysis
#4
Sae Rom Chung, Chong Hyun Suh, Jung Hwan Baek, Young Jun Choi, Jeong Hyun Lee
OBJECTIVES: To systematically review the published literature and evaluate the efficacy and safety of core needle biopsy (CNB) for initially detected thyroid nodules. METHODS: The Ovid-MEDLINE and Embase databases were searched for studies evaluating CNB for the diagnosis of initially detected thyroid nodules. A meta-analysis was performed to evaluate non-diagnostic results, inconclusive results and diagnostic accuracy for a diagnosis of malignancy with CNB. To overcome heterogeneity, multiple subgroup analyses were performed...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789910/a-radiopaque-3d-printed-anthropomorphic-phantom-for-simulation-of-ct-guided-procedures
#5
Paul Jahnke, Felix Benjamin Schwarz, Marco Ziegert, Tobias Almasi, Owais Abdelhadi, Maximilian Nunninger, Bernd Hamm, Michael Scheel
OBJECTIVES: To develop an anthropomorphic phantom closely mimicking patient anatomy and to evaluate the phantom for the simulation of computed tomography (CT)-guided procedures. METHODS: Patient CT images were printed with aqueous potassium iodide solution (1 g/mL) on paper. The printed paper sheets were stacked in alternation with 1-mm thick polyethylene foam layers, cut to the patient shape and glued together to create an anthropomorphic abdomen phantom. Ten interventional radiologists performed periradicular infiltration on the phantom and rated the phantom procedure regarding different aspects of suitability for simulating CT-guided procedures...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789909/fast-3-t-mr-guided-transrectal-prostate-biopsy-using-an-in-room-tablet-device-for-needle-guide-alignment-a-feasibility-study
#6
Christiaan G Overduin, Jan Heidkamp, Eva Rothgang, Jelle O Barentsz, Frank de Lange, Jurgen J Fütterer
OBJECTIVES: To assess the feasibility of adding a tablet device inside the scanner room to assist needle-guide alignment during magnetic resonance (MR)-guided transrectal prostate biopsy. METHODS: Twenty patients with one cancer-suspicious region (CSR) with PI-RADS score ≥ 4 on diagnostic multiparametric MRI were prospectively enrolled. Two orthogonal scan planes of an MR fluoroscopy sequence (~3 images/s) were aligned to the CSR and needle-guide pivoting point...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789908/triple-rule-out-ct-angiography-using-two-axial-scans-with-16-cm-wide-detector-for-radiation-dose-reduction
#7
Yuhuan Chen, Qi Wang, Jianying Li, Yongjun Jia, Qi Yang, Taiping He
OBJECTIVE: To explore the use of two consecutive axial scans in triple-rule-out (TRO) examination on a 16 cm wide-detector CT for radiation dose reduction. MATERIALS AND METHODS: Sixty TRO patients were assigned to either study group (Group A, n = 30) or control group (Group B, n = 30). Group A used a two-phasic contrast injection: 25mgI/kg/s for 12 s in 1st and at 3.0 ml/s injection rate for 7 s in 2nd phase. The pulmonary artery, coronary artery and aorta were scanned in succession with two axial scans using smart-coverage technique...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789907/can-quantitative-iodine-parameters-on-dect-replace-perfusion-ct-parameters-in-colorectal-cancers
#8
Hyo-Jin Kang, Se Hyung Kim, Jae Seok Bae, Sun Kyung Jeon, Joon Koo Han
OBJECTIVES: To determine the correlation between iodine concentrations derived from dual-energy CT (DECT) and perfusion CT (PCT) parameters in patients with pathologically proven colorectal cancers (CRC) and to evaluate their reproducibility and respective radiation exposures. METHODS: Institutional review board approval and written informed consents were obtained for this study. Forty-one patients with CRCs who underwent same-day DECT and PCT were prospectively enrolled...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789906/percutaneous-intentional-intra-luminal-assisted-recanalization-pilar-technique-of-challenging-chronic-total-occlusions-using-a-high-frequency-vibration-device
#9
Stephanie Volpi, Amine Chouiter, Francois Saucy, Steven Hajdu, Anne-Marie Jouannic, Salah D Qanadli
OBJECTIVES: Recanalization of peripheral chronic total occlusions (CTO) is technically challenging especially in cases of in-stent and/or pre-stent and heavily calcified lesions. A high-frequency vibrational device (HFVD) was first used as a secondary-intention device in CTO recanalizations when they were refractory to a guidewire. The aim of this study was to assess the safety and efficacy of the HFVD as a first-line treatment for challenging CTOs and thus to define the percutaneous intentional intraluminal-assisted recanalization (PILAR) technique...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29789905/pre-operative-mri-staging-of-endometrial-cancer-in-a-multicentre-cancer-network-can-we-match-single-centre-study-results
#10
N D Soneji, N Bharwani, A Ferri, V Stewart, A Rockall
OBJECTIVES: To evaluate the staging accuracy of magnetic resonance imaging (MRI) for endometrial cancer in daily practice over a 3-year period at a tertiary referral centre receiving scans from a large number of hospitals with varying protocols. To compare these daily practice results to published data from single-centre studies. METHODS: After ethical approval, MRI staging records for 270 studies from nine network and three centre hospitals were retrospectively collected and compared with final operative histopathology...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29770848/imaging-biomarkers-from-multiparametric-magnetic-resonance-imaging-are-associated-with-survival-outcomes-in-patients-with-brain-metastases-from-breast-cancer
#11
Bang-Bin Chen, Yen-Shen Lu, Chih-Wei Yu, Ching-Hung Lin, Tom Wei-Wu Chen, Shwu-Yuan Wei, Ann-Lii Cheng, Tiffany Ting-Fang Shih
OBJECTIVES: The aim of this study is to investigate the correlation of survival outcomes with imaging biomarkers from multiparametric magnetic resonance imaging (MRI) in patients with brain metastases from breast cancer (BMBC). METHODS: This study was approved by the institutional review board. Twenty-two patients with BMBC who underwent treatment involving bevacizumab on day 1, etoposide on days 2-4, and cisplatin on day 2 in 21-day cycles were prospectively enrolled for a phase II study...
May 16, 2018: European Radiology
https://www.readbyqxmd.com/read/29767320/post-hepatectomy-liver-failure-after-major-hepatic-surgery-not-only-size-matters
#12
Ulrika Asenbaum, Klaus Kaczirek, Ahmed Ba-Ssalamah, Helmut Ringl, Christoph Schwarz, Fredrik Waneck, Fabian Fitschek, Christian Loewe, Richard Nolz
OBJECTIVES: To compare the value of functional future liver remnant (functFLR) to established clinical and imaging variables in prediction of post-hepatectomy liver failure (PHLF) after major liver resection. METHODS: This retrospective, cross-sectional study included 62 patients, who underwent gadoxetic acid enhanced MRI and MDCT within 10 weeks prior to resection of ≥ 4 liver segments. Future liver remnant (FLR) was measured in MDCT using semi-automatic software...
May 16, 2018: European Radiology
https://www.readbyqxmd.com/read/29761362/pulmonary-hypertension-due-to-left-heart-disease-diagnostic-and-prognostic-value-of-ct-in-chronic-systolic-heart-failure
#13
Geoffrey C Colin, Bernhard L Gerber, Christophe de Meester de Ravenstein, David Byl, Anna Dietz, Michele Kamga, Agnes Pasquet, David Vancraeynest, Jean-Louis Vanoverschelde, Anne-Marie D'Hondt, Benoit Ghaye, Anne-Catherine Pouleur
OBJECTIVES: To evaluate the ability of chest computed tomography (CT) to predict pulmonary hypertension (PH) and outcome in chronic heart failure with reduced ejection fraction (HFrEF). METHODS: We reviewed 119 consecutive patients with HFrEF by CT, transthoracic echocardiography (TTE) and right heart catheterization (RHC). CT-derived pulmonary artery (PA) diameter and PA to ascending aorta diameter ratio (PA:A ratio), left atrial, right atrial, right ventricular (RV) and left ventricular volumes were correlated with RHC mean pulmonary arterial pressure (mPAP) ...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29761361/ultrasonography-in-diagnosing-clinically-occult-groin-hernia-systematic-review-and-meta-analysis
#14
Robert M Kwee, Thomas C Kwee
OBJECTIVES: To provide an updated systematic review on the performance of ultrasonography (US) in diagnosing clinically occult groin hernia. METHODS: A systematic search was performed in MEDLINE and Embase. Methodological quality of included studies was assessed. Accuracy data of US in detecting clinically occult groin hernia were extracted. Positive predictive value (PPV) was pooled with a random effects model. For studies investigating the performance of US in hernia type classification (inguinal vs femoral), correctly classified proportion was assessed...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29761360/tumour-volume-of-resectable-oesophageal-squamous-cell-carcinoma-measured-with-mri-correlates-well-with-t-category-and-lymphatic-metastasis
#15
Lan Wu, Jing Ou, Tian-Wu Chen, Rui Li, Xiao-Ming Zhang, Yan-Li Chen, Yu Jiang, Jian-Qiong Yang, Jin-Ming Cao
OBJECTIVES: To determine association of gross tumour volume (GTV) of resectable oesophageal squamous cell carcinoma (SCC) measured on T2 -weighted imaging (T2 WI), contrast-enhanced T1 -weighted imaging (CE-T1 WI) and diffusion-weighted imaging (DWI) with T category and lymphatic metastasis (LM). METHODS: Sixty oesophageal SCC patients underwent fat-suppressed T2 WI, CE-T1 WI and DWI with b values of 0, 500 and 800 s/mm2 . GTV was measured on three sequences. Statistical analyses were performed to determine association of GTV with T category and LM...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29761359/ct-colonography-size-reduction-of-submerged-colorectal-polyps-due-to-electronic-cleansing-and-ct-window-settings
#16
Christian Bräuer, Philippe Lefere, Stefaan Gryspeerdt, Helmut Ringl, Ali Al-Mukhtar, Paul Apfaltrer, Dominik Berzaczy, Barbara Füger, Julia Furtner, Christina Müller-Mang, Matthias Pones, Martina Scharitzer, Ramona Woitek, Anno Graser, Michael Weber, Thomas Mang
OBJECTIVES: To assess whether electronic cleansing (EC) of tagged residue and different computed tomography (CT) windows influence the size of colorectal polyps in CT colonography (CTC). METHODS: A database of 894 colonoscopy-validated CTC datasets of a low-prevalence cohort was retrospectively reviewed to identify patients with polyps ≥6 mm that were entirely submerged in tagged residue. Ten radiologists independently measured the largest diameter of each polyp, two-dimensionally, before and after EC in colon, bone, and soft-tissue-windows, in randomised order...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29761358/deep-learning-for-staging-liver-fibrosis-on-ct-a-pilot-study
#17
Koichiro Yasaka, Hiroyuki Akai, Akira Kunimatsu, Osamu Abe, Shigeru Kiryu
OBJECTIVES: To investigate whether liver fibrosis can be staged by deep learning techniques based on CT images. METHODS: This clinical retrospective study, approved by our institutional review board, included 496 CT examinations of 286 patients who underwent dynamic contrast-enhanced CT for evaluations of the liver and for whom histopathological information regarding liver fibrosis stage was available. The 396 portal phase images with age and sex data of patients (F0/F1/F2/F3/F4 = 113/36/56/66/125) were used for training a deep convolutional neural network (DCNN); the data for the other 100 (F0/F1/F2/F3/F4 = 29/9/14/16/32) were utilised for testing the trained network, with the histopathological fibrosis stage used as reference...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29761357/classifying-brain-metastases-by-their-primary-site-of-origin-using-a-radiomics-approach-based-on-texture-analysis-a-feasibility-study
#18
Rafael Ortiz-Ramón, Andrés Larroza, Silvia Ruiz-España, Estanislao Arana, David Moratal
OBJECTIVE: To examine the capability of MRI texture analysis to differentiate the primary site of origin of brain metastases following a radiomics approach. METHODS: Sixty-seven untreated brain metastases (BM) were found in 3D T1-weighted MRI of 38 patients with cancer: 27 from lung cancer, 23 from melanoma and 17 from breast cancer. These lesions were segmented in 2D and 3D to compare the discriminative power of 2D and 3D texture features. The images were quantized using different number of gray-levels to test the influence of quantization...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29744642/gadolinium-deposition-within-the-paediatric-brain-no-increased-intrinsic-t1-weighted-signal-intensity-within-the-dentate-nucleus-following-the-administration-of-a-minimum-of-four-doses-of-the-macrocyclic-agent-gadobutrol
#19
Jonathan R Young, Joe Qiao, Iren Orosz, Noriko Salamon, Mark A Franke, Hyun J Kim, Whitney B Pope
OBJECTIVES: To determine whether repeated administration of the macrocyclic gadolinium-based contrast agent (GBCA) gadobutrol in children is associated with T1-weighted hyperintensity within the dentate nucleus, an imaging surrogate for gadolinium deposition. METHODS: With institutional review board approval, we identified a cohort of eight patients aged 18 years or younger who underwent at least four gadobutrol-enhanced magnetic resonance imaging (MRI) examinations of the brain from 2013 to 2017...
May 9, 2018: European Radiology
https://www.readbyqxmd.com/read/29744641/evaluation-of-renal-lesions-using-contrast-enhanced-ultrasound-ceus-a-10-year-retrospective-european-single-centre-analysis
#20
Johannes Rübenthaler, G Negrão de Figueiredo, K Mueller-Peltzer, D A Clevert
OBJECTIVE: To investigate the usefulness of contrast-enhanced ultrasound (CEUS) in the evaluation of renal masses. METHODS: This study included 255 patients with renal masses. Ages ranged from 18-86 years. CEUS was used for determining malignancy or benignancy and findings were correlated with the histopathological outcome. Out of 255 lesions, 212 lesions were malignant (83.1%) and 43 were benign (16.9%). Diagnostic accuracy was tested using the histopathological diagnosis as the gold standard...
May 9, 2018: European Radiology
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