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Acta Radiologica

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https://www.readbyqxmd.com/read/29451023/mammographic-screening-attendance-among-immigrant-and-minority-women-a-systematic-review-and-meta-analysis
#1
Sameer Bhargava, Kåre Moen, Samera Azeem Qureshi, Solveig Hofvind
Background Groups of immigrant and minority women are more often diagnosed with advanced stage breast cancer than other women. Mammographic screening aims to reduce mortality from breast cancer through early detection in asymptomatic women. Purpose To compare mammographic screening attendance among immigrant and minority women to that of other women. Material and Methods A literature search of PubMed, Embase, Google Scholar, and Cochrane identified 1369 papers published between January 1995 and March 2016. In the review, we included 33 studies investigating mammographic screening attendance among immigrant and/or minority women...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29451022/breast-tomosynthesis-for-the-clarification-of-mammographic-bi-rads-3-lesions-can-decrease-follow-up-examinations-and-enables-immediate-cancer-diagnosis
#2
Sonja D Bahrs, Vanessa Otto, Valerie Hattermann, Bernhard Klumpp, Markus Hahn, Konstantin Nikolaou, Katja Siegmann-Luz
Background The limited sensitivity of mammography in case of a high breast density often produces unclear or false-positive findings, so-called BI-RADS 3 lesions, which have to be followed up to prove benignity. Digital breast tomosynthesis (DBT) was developed to reduce such summation effects. Purpose To evaluate the influence of an additional DBT on the management of mammographic BI-RADS 3 findings and whether DBT can decrease the time to definitive diagnosis or not. Material and Methods We analyzed 87 patients with a mammographic non-calcified BI-RADS 3 lesion who underwent an additional DBT of the affected breast...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29448806/endovascular-treatment-for-the-control-of-active-vaginal-bleeding-from-uterine-cervical-cancer-treated-with-radiotherapy
#3
Cheng Shi Chen, Sohee Park, Ji Hoon Shin, Yasir Nouri, Jong-Woo Kim, Hyun-Ki Yoon, Gi-Young Ko
Background Endovascular treatment has become a significant therapeutic option for the management of intractable bleeding in gynecologic malignancies. However, the endovascular treatment types were almost never mentioned when active bleeding from different arteries was identified. Purpose To present angiographic details and evaluate clinical efficacy of endovascular treatments to control active vaginal bleeding in uterine cervical cancer patients treated with radiotherapy. Material and Methods In this retrospective study, six, consecutive cervical cancer patients treated with radiotherapy who underwent endovascular treatment for active vaginal bleeding were included...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29448805/differentiating-skull-base-chordomas-and-invasive-pituitary-adenomas-with-conventional-mri
#4
Ankang Gao, Jie Bai, Jingliang Cheng, Xiao Cheng, Shujian Li, Zanxia Zhang, Yong Zhang
Background It is difficult to distinguish between invasive pituitary adenomas (IPAs) and skull base chordomas based on tumor location and clinical manifestations. Purpose To investigate the value of the apparent diffusion coefficient (ADC), T2-weighted (T2W) imaging, and dynamic contrast enhancement (DCE) in differentiating skull base chordomas and IPAs. Material and Methods Data for 21 patients with skull base chordomas and 27 patients with IPAs involving the paranasal sinus were retrospectively reviewed, and all diagnoses were pathologically confirmed...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29444587/uterine-artery-embolization-in-a-sheep-model-biodegradable-versus-non-degradable-microspheres
#5
Inger Keussen, Johan Bengtsson, Dolores Gavier-Widén, Erika Karlstam
Background Transarterial embolization with particles is a relatively common treatment method in both malignant and benign disorders. Permanent occlusion of the uterine arteries may sometimes be disadvantageous. Purpose To compare the local tissue effects, possible side effects, and extent of recanalization following uterine artery embolization, using either degradable or non-degradable microspheres in a sheep model. Material and Methods In 22 female sheep, the uterine artery (UA) was unilaterally, superselectively embolized, with either degradable starch microspheres-DSM (group A) or calibrated gelatin coated spherical shape tris-acryl microspheres-TGMS (group B)...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29444586/sex-differences-in-pericardial-adipose-tissue-assessed-by-pet-ct-and-association-with-cardiometabolic-risk
#6
Corey M Gill, Debora C Azevedo, Adriana L Oliveira, Edgar L Martinez-Salazar, Martin Torriani, Miriam A Bredella
Background Recent studies suggest that pericardial adipose tissue (PAT) is associated with whole body adiposity and insulin resistance. Moreover, the incidence of cardiovascular disease (CVD) differs between men and women. Although CVD is more prevalent in men, women suffering from CVD have a higher mortality compared to men. Differences in PAT may account for some of the observed sex differences in manifestations of CVD. Purpose To assess pericardial adipose tissue (PAT) as a biomarker for cardiometabolic risk and to assess potential sex differences...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29433344/association-of-cardiovascular-risk-factors-on-myocardial-perfusion-and-fibrosis-in-asymptomatic-individuals-cardiac-magnetic-resonance-study
#7
Min Jae Cha, Sung Mok Kim, Hyun Su Kim, Yiseul Kim, Yeon Hyeon Choe
Background Myocardial perfusion reserve index (MPRI) and extracellular volume fraction (ECV) on cardiac magnetic resonance (CMR) are known to quantify coronary microvascular dysfunction and myocardial fibrosis, respectively. Purpose To demonstrate that cardiovascular risk factors such as hypertension, diabetes, hyperlipidemia, and smoking are correlated with MPRI and ECV on CMR in asymptomatic individuals. Material and Methods Between October 2013 and July 2014, 196 individuals underwent CMR. After excluding those with chest pain, arrhythmia, and obstructive coronary artery disease, participants were divided into five groups: those without risk factor (n = 26) and those with one (n = 43), two (n = 35), three (n = 24), or four (n = 6) risk factors...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29430938/visibility-of-the-graft-hepatic-artery-using-superb-microvascular-imaging-in-liver-transplantation-recipients-initial-experience
#8
Hye Young Jang, Kyoung Won Kim, So Yeon Kim, Jin Sil Kim, Sang Hyun Choi, Se-Young Kim, Sung-Gyu Lee
Background Hepatic artery (HA) obstruction is one of the most threatening complications following liver transplantation (LT); however, conventional color Doppler imaging (CDI) suffers from technical limitations regarding the visualization of fine vessels and low-velocity blood flow. Purpose To test the visibility of HA in postoperative evaluation of LT using a superb microvascular imaging (SMI). Material and Methods This retrospective study was approved by our institutional review board. Fifty-five consecutive patients (58 grafts; mean age = 56 years) who underwent LT with Doppler ultrasonography (US) on postoperative day 1 were included...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29430937/removal-of-evidential-motion-contaminated-and-poorly-fitted-image-data-improves-ivim-diffusion-mri-parameter-scan-rescan-reproducibility
#9
Olivier Chevallier, Nan Zhou, Jian He, Romaric Loffroy, Yì Xiáng J Wáng
Background It has been reported that intravoxel incoherent motion (IVIM) diffusion magnetic resonance imaging (MRI) scan-rescan reproducibility is unsatisfactory. Purpose To study IVIM MRI parameter reproducibility for liver parenchyma after the removal of motion-contaminated and/or poorly fitted image data. Material and Methods Eighteen healthy volunteers had liver scans twice in the same session to assess scan-rescan repeatability, and again in another session after an average interval of 13 days to assess reproducibility...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29430936/tailored-ct-angiography-in-follow-up-after-endovascular-aneurysm-repair-evar-combined-dose-reduction-techniques
#10
Georg Böning, Roman A Rotzinger, Johannes F Kahn, Patrick Freyhardt, Diane M Renz, Martin Maurer, Florian Streitparth
Background Endovascular aneurysm repair (EVAR) requires lifelong surveillance by computed tomography angiography (CTA). This is attended by a substantial accumulation of radiation exposure. Iterative reconstruction (IR) has been introduced to approach dose reduction. Purpose To evaluate adaptive statistical iterative reconstruction (ASIR) at different levels of tube voltage concerning image quality and dose reduction potential in follow-up post EVAR. Material and Methods One hundred CTAs in 67 patients with EVAR were examined using five protocols: protocol A (n = 40) as biphasic standard using filtered back projection (FBP) at 120 kV; protocols B (n = 40), C (n = 10), and D1 (n = 5) biphasic using ASIR at 120, 100, and 80 kV, respectively; and protocol D2 (n = 5) with a monophasic splitbolus ASIR protocol at 80 kV...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29430935/the-effect-of-glioblastoma-heterogeneity-on-survival-stratification-a-multimodal-mr-imaging-texture-analysis
#11
Yang Liu, Xi Zhang, Na Feng, Lulu Yin, Yalong He, Xiaopan Xu, Hongbing Lu
Background Quantitative evaluation of the effect of glioblastoma (GBM) heterogeneity on survival stratification would be critical for the diagnosis, treatment decision, and follow-up management. Purpose To evaluate the effect of GBM heterogeneity on survival stratification, using texture analysis on multimodal magnetic resonance (MR) imaging. Material and Methods A total of 119 GBM patients (65 in long-term and 54 in short-term survival group, separated by overall survival of 12 months) were selected from the Cancer Genome Atlas, who underwent the T1-weighted (T1W) contrast-enhanced (CE), T1W, T2-weighted (T2W), and FLAIR sequences...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29409326/five-year-outcome-after-pelvic-floor-reconstructive-surgery-evaluation-using-dynamic-magnetic-resonance-imaging-compared-to-clinical-examination-and-quality-of-life-questionnaire
#12
Céline D Alt, Laura Benner, Theresa Mokry, Florian Lenz, Peter Hallscheidt, Christof Sohn, Hans-Ulrich Kauczor, Kerstin A Brocker
Background Dynamic magnetic resonance imaging (dMRI) captures the entire pelvis during Valsalva maneuver and helps diagnosing pelvic floor changes after reconstructive surgery. Purpose To evaluate therapeutic outcome five years after reconstructive surgery using clinical examination, dMRI, and quality-of-life (QOL) questionnaire. Material and Methods Clinical examination, dMRI, and QOL questionnaire were conducted before surgery and in the follow-ups at 12 weeks, one year, and five years in women with pelvic organ prolapse (POP) stage ≥2...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29378421/early-animal-model-evaluation-of-an-implantable-contrast-agent-to-enhance-magnetic-resonance-imaging-of-arterial-bypass-vein-grafts
#13
Dimitrios Mitsouras, Ming Tao, Margreet R de Vries, Kaspar Trocha, Oscar R Miranda, Praveen Kumar Vemula, Kui Ding, Amir Imanzadeh, Frederick J Schoen, Jeffrey M Karp, C Keith Ozaki, Frank J Rybicki
Background Non-invasive monitoring of autologous vein graft (VG) bypass grafts is largely limited to detecting late luminal narrowing. Although magnetic resonance imaging (MRI) delineates vein graft intima, media, and adventitia, which may detect early failure, the scan time required to achieve sufficient resolution is at present impractical. Purpose To study VG visualization enhancement in vivo and delineate whether a covalently attached MRI contrast agent would enable quicker longitudinal imaging of the VG wall...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29368540/high-quality-low-dose-cardiovascular-computed-tomography-cct-in-pediatric-patients-using-a-64-slice-scanner
#14
Paola Maria Cannaò, Francesco Secchi, Marco Alì, Ida Daniela D'Angelo, Marco Scarabello, Giovanni Di Leo, Francesco Sardanelli
Background Cardiovascular computed tomography (CCT) technology is rapidly advancing allowing to perform good quality examinations with a radiation dose as low as 1.2 mSv. However, latest generation scanners are not available in all centers. Purpose To estimate radiation dose and image quality in pediatric CCT using a standard 64-slice scanner. Material and Methods A total of 100 patients aged 6.9 ± 5.4 years (mean ± standard deviation) who underwent a 64-slice CCT scan using 80, 100, or 120 kVp, were retrospectively evaluated...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29363321/comparison-of-contrast-enhanced-ultrasound-with-mri-in-the-diagnosis-of-complex-cystic-renal-masses-a-meta-analysis
#15
Linli Zhou, Lemin Tang, Tao Yang, Wei Chen
Background The differential diagnosis of cystic renal masses still faces great challenges. There has been no systematically assessment to compare the value of contrast-enhanced ultrasound (CEUS) with magnetic resonance imaging (MRI) in the diagnosis of cystic renal masses. Purpose To perform a meta-analysis to compare the diagnostic efficacy of CEUS with that of MRI for cystic renal masses. Material and Methods A systematic search was performed for literature evaluating the diagnostic performance of CEUS or MRI in cystic renal masses...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29359950/image-quality-in-coronary-computed-tomography-angiography-influence-of-adaptive-statistical-iterative-reconstruction-at-various-radiation-dose-levels
#16
Helle Precht, Oke Gerke, Jesper Thygesen, Kenneth Egstrup, Søren Auscher, Dag Waaler, Jess Lambrechtsen
Background Computed tomography (CT) technology is rapidly evolving and software solution developed to optimize image quality and/or lower radiation dose. Purpose To investigate the influence of adaptive statistical iterative reconstruction (ASIR) at different radiation doses in coronary CT angiography (CCTA) in detailed image quality. Material and Methods A total of 160 CCTA were reconstructed as follows: 55 scans with filtered back projection (FBP) (650 mA), 51 scans (455 mA) with 30% ASIR (ASIR30), and 54 scans (295 mA) with 60% ASIR (ASIR60)...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29359949/comparison-of-peritumoral-stromal-tissue-stiffness-obtained-by-shear-wave-elastography-between-benign-and-malignant-breast-lesions
#17
Hye Sun Park, Hee Jung Shin, Ki Chang Shin, Joo Hee Cha, Eun Young Chae, Woo Jung Choi, Hak Hee Kim
Background Aggressive breast cancers produce abnormal peritumoral stiff areas, which can differ between benign and malignant lesions and between different subtypes of breast cancer. Purpose To compare the tissue stiffness of the inner tumor, tumor border, and peritumoral stroma (PS) between benign and malignant breast masses by shear wave elastography (SWE). Material and Methods We enrolled 133 consecutive patients who underwent preoperative SWE. Using OsiriX commercial software, we generated multiple 2-mm regions of interest (ROIs) in a linear arrangement on the inner tumor, tumor border, and PS...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29350048/triple-split-bolus-versus-single-bolus-ct-in-abdominal-trauma-patients-a-comparative-study
#18
Johannes Clemens Godt, Torsten Eken, Anselm Schulz, Cathrine K Johansen, Anette Aarsnes, Johann Baptist Dormagen
Background Split-bolus computed tomography (CT) is a recent development in trauma imaging. Instead of multiple scans in different contrast phases after a single contrast bolus, split-bolus protocols consist of one single scan of the thorax and abdomen after two or three contrast injections at different points of time. Purpose To evaluate and compare image quality and injury findings of a new triple-split-bolus CT (TS-CT) protocol of thorax and abdomen with those of a portal venous phase CT (PV-CT) in the same patient group...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29345146/quantitative-contrast-enhanced-ultrasound-for-monitoring-vedolizumab-therapy-in-inflammatory-bowel-disease-patients-a-pilot-study
#19
Ruediger S Goertz, Daniel Klett, Dane Wildner, Raja Atreya, Markus F Neurath, Deike Strobel
Background Microvascularization of the bowel wall can be visualized and quantified non-invasively by software-assisted analysis of derived time-intensity curves. Purpose To perform software-based quantification of bowel wall perfusion using quantitative contrast-enhanced ultrasound (CEUS) according to clinical response in patients with inflammatory bowel disease treated with vedolizumab. Material and Methods In a prospective study, in 18 out of 34 patients, high-frequency ultrasound of bowel wall thickness using color Doppler flow combined with CEUS was performed at baseline and after 14 weeks of treatment with vedolizumab...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29345145/process-improvement-methodologies-uncover-unexpected-gaps-in-stroke-care
#20
Anthony D Kuner, Andrew J Schemmel, B Dustin Pooler, John-Paul J Yu
Background The diagnosis and treatment of acute stroke requires timed and coordinated effort across multiple clinical teams. Purpose To analyze the frequency and temporal distribution of emergent stroke evaluations (ESEs) to identify potential contributory workflow factors that may delay the initiation and subsequent evaluation of emergency department stroke patients. Material and Methods A total of 719 sentinel ESEs with concurrent neuroimaging were identified over a 22-month retrospective time period. Frequency data were tabulated and odds ratios calculated...
January 1, 2018: Acta Radiologica
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