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    8032 results match your criteria Acta Radiologica [Journal]

    1 OF 161

    Triple-split-bolus versus single-bolus CT in abdominal trauma patients: a comparative study.
    Acta Radiol 2018 Jan 1:284185117752522. Epub 2018 Jan 1.
    1 Department of Radiology and Nuclear Medicine, 56633 Oslo University Hospital Ullevål , Oslo, Norway.
    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. Read More

    Quantitative contrast-enhanced ultrasound for monitoring vedolizumab therapy in inflammatory bowel disease patients: a pilot study.
    Acta Radiol 2018 Jan 1:284185117752032. Epub 2018 Jan 1.
    Department of Internal Medicine 1, 9171 Friedrich-Alexander-University Erlangen-Nuernberg , Erlangen, Germany.
    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. Read More

    Process improvement methodologies uncover unexpected gaps in stroke care.
    Acta Radiol 2018 Jan 1:284185117753658. Epub 2018 Jan 1.
    1 Department of Radiology, University of Wisconsin School of Medicine and Public Health Madison, Madison, WI, USA.
    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. Read More

    Intra- and inter-observer agreement in the visual interpretation of interim 18F-FDG PET/CT in malignant lymphoma: influence of clinical information.
    Acta Radiol 2018 Jan 1:284185117751279. Epub 2018 Jan 1.
    1 Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University, Graduate School of Medicine, Kyoto, Japan.
    Background Interim PET/CT is widely performed in lymphoma patients in clinical practice and clinical trials. Visual assessment using a 5-point scale is proposed for PET/CT interpretation, but intra- and inter-observer variation is not fully investigated. Purpose To investigate intra- and inter-observer variations in the reporting of interim positron emission tomography/computed tomography (PET/CT) in lymphoma patients, and the influence of clinical information on the interpretation. Read More

    Diagnostic performance of static single-scan stress perfusion cardiac computed tomography in detecting hemodynamically significant coronary artery stenosis: a comparison with combined invasive coronary angiography and cardiovascular magnetic resonance-myocardial perfusion imaging.
    Acta Radiol 2018 Jan 1:284185117752553. Epub 2018 Jan 1.
    1 Departments of Radiology, 58933 Konkuk University Medical Center, Konkuk University School of Medicine , Seoul, Republic of Korea.
    Background Non-invasive anatomical and physiological evaluations of coronary artery disease (CAD) may be obtained with static single-scan stress perfusion cardiac computed tomography (SSPCT). Purpose To determine the diagnostic performance of static SSPCT for identifying hemodynamically significant CAD. Material and Methods This prospective study included 29 patients with suspected or known CAD who underwent static SSPCT, cardiovascular magnetic resonance myocardial perfusion imaging (CMR-MPI), and invasive coronary angiography (ICA). Read More

    Evaluation of an iterative model-based CT reconstruction algorithm by intra-patient comparison of standard and ultra-low-dose examinations.
    Acta Radiol 2018 Jan 1:284185117752551. Epub 2018 Jan 1.
    1 Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany.
    Background The explosive growth of computer tomography (CT) has led to a growing public health concern about patient and population radiation dose. A recently introduced technique for dose reduction, which can be combined with tube-current modulation, over-beam reduction, and organ-specific dose reduction, is iterative reconstruction (IR). Purpose To evaluate the quality, at different radiation dose levels, of three reconstruction algorithms for diagnostics of patients with proven liver metastases under tumor follow-up. Read More

    Arterial spin labeling: a technical overview.
    Acta Radiol 2018 Jan 1:284185117752552. Epub 2018 Jan 1.
    1 Department of Radiology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark.
    Arterial spin labeling (ASL) is a non-invasive magnetic resonance imaging perfusion method based on changes in net-magnetization of blood water. The absence of contrast use and ionizing radiation, renders ASL valuable in hyper-acute settings as a monitoring tool for repeated dynamical measurements during and after intervention, and for patients with known co-morbidities. This text provides a short methodological introduction to ASL and contrasts it with traditional contrast-enhanced perfusion imaging. Read More

    Diagnostic bone imaging in patients with prostate cancer: patient experience and acceptance of NaF-PET/CT, choline-PET/CT, whole-body MRI, and bone SPECT/CT.
    Acta Radiol 2018 Jan 1:284185117751280. Epub 2018 Jan 1.
    1 Department of Radiology, Copenhagen University Hospital Herlev and Gentofte, Herlev, Denmark.
    Background Patient acceptance is an important factor when implementing imaging methods in clinical practice in line with availability, diagnostic accuracy, and cost-effectiveness. Purpose To investigate patient experience and acceptance regarding18F-sodium fluoride (NaF) positron emission tomography/computed tomography (PET/CT), 11 C-choline-PET/CT, whole-body magnetic resonance imaging (WB-MRI), and 99mTc-hydroxymethane diphosphonate (HDP) single photon emission/computed tomography (SPECT/CT). Material and Methods One hundred and forty-nine patients with prostate cancer filled in a questionnaire regarding their experience of the imaging procedures they had been undergoing as part of a diagnostic accuracy study. Read More

    Resting-state fMRI in primary Sjögren syndrome.
    Acta Radiol 2018 Jan 1:284185117749993. Epub 2018 Jan 1.
    Department of Radiology, Xiangya Hospital, Central South University, Changsha, PR China.
    Background The involvement of the central nervous system in primary Sjögren syndrome (pSS) remains controversial. Functional magnetic resonance imaging (fMRI) is a relatively new method that can be applied to investigate the heterogeneity of central nervous system (CNS) involvement in pSS patients through regional homogeneity (ReHo) analysis. Purpose To collect data from pSS patients and healthy controls, and use ReHo analysis to elucidate the neurobiological mechanism of CNS involvement in pSS. Read More

    Metal artifact reduction in CT, a phantom study: subjective and objective evaluation of four commercial metal artifact reduction algorithms when used on three different orthopedic metal implants.
    Acta Radiol 2018 Jan 1:284185117751278. Epub 2018 Jan 1.
    2 Department of Radiology, Haukeland University Hospital, Bergen, Norway.
    Background Metal implants may introduce severe artifacts in computed tomography (CT) images. Over the last few years dedicated algorithms have been developed in order to reduce metal artifacts in CT images. Purpose To investigate and compare metal artifact reduction algorithms (MARs) from four different CT vendors when imaging three different orthopedic metal implants. Read More

    Coronary computed tomography in heart transplant patients: detection of significant stenosis and cardiac allograft vasculopathy, image quality, and radiation dose.
    Acta Radiol 2017 Jan 1:284185117748354. Epub 2017 Jan 1.
    1 Department of Radiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.
    Background Cardiac allograft vasculopathy (CAV) is an accelerated form of atherosclerosis unique to heart transplant (HTX) patients. Purpose To investigate the detection of significant coronary artery stenosis and CAV, determinants of image quality, and the radiation dose in coronary computed tomography angiography (CCTA) of HTX patients with 64-slice multidetector CT (64-MDCT). Material and Methods Fifty-two HTX recipients scheduled for invasive coronary angiography (ICA) were prospectively enrolled and underwent CCTA before ICA with intravascular ultrasound (IVUS). Read More

    Quantification of pancreatic fat with dual-echo imaging at 3.0-T MR in clinical application: how do the corrections for T1 and T2* relaxation effect work and simplified correction strategy.
    Acta Radiol 2017 Jan 1:284185117745908. Epub 2017 Jan 1.
    Department of Radiology, West China Hospital of Sichuan University, Chengdu, PR China.
    Background Dual-echo imaging is a routine clinical magnetic resonance (MR) sequence affected by T1 and T2* relaxation effect in fat quantification. The separate impacts of T1 and T2* relaxation effect in pancreatic fat quantification using dual-echo imaging at 3.0-T MR have not been reported in detail. Read More

    Increased diffusion and decreased perfusion in epiphyses of femoral heads detected via intravoxel incoherent motion after closed reduction in children with developmental dysplasia of the hip.
    Acta Radiol 2017 Jan 1:284185117748489. Epub 2017 Jan 1.
    4 Department of Radiology, Tianjin First Center Hospital, Tianjin, PR China.
    Background Patients with developmental dysplasia of the hip (DDH) may have decreased blood supply to the femoral heads. Finding a non-invasive method to evaluate whether the femoral heads in patients with DDH are ischemic is paramount for orthopedic surgeons. Purpose To identify whether parameters reflecting perfusion and diffusion in intravoxel incoherent motion (IVIM) sequences can be used to assess ischemia in femoral heads in patients with DDH after closed reduction. Read More

    Prognostic value of the maximum standardized uptake value of pre-treatment primary lesions in small-cell lung cancer on 18F-FDG PET/CT: a meta-analysis.
    Acta Radiol 2017 Jan 1:284185117745907. Epub 2017 Jan 1.
    1 Department of Radiology, ZhongNan Hospital of WuHan University, Wuhan City, PR China.
    Background 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT) has been widely used in clinical practice. However, the prognostic value of the pre-treatment standardized uptake value (SUV) for patients with small-cell lung cancer (SCLC) remains controversial. Purpose To investigate the prognostic role of pre-treatment 18F-FDG PET on SCLC patients by meta-analysis. Read More

    New reconstruction algorithm for digital breast tomosynthesis: better image quality for humans and computers.
    Acta Radiol 2017 Jan 1:284185117748487. Epub 2017 Jan 1.
    1 Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, the Netherlands.
    Background The image quality of digital breast tomosynthesis (DBT) volumes depends greatly on the reconstruction algorithm. Purpose To compare two DBT reconstruction algorithms used by the Siemens Mammomat Inspiration system, filtered back projection (FBP), and FBP with iterative optimizations (EMPIRE), using qualitative analysis by human readers and detection performance of machine learning algorithms. Material and Methods Visual grading analysis was performed by four readers specialized in breast imaging who scored 100 cases reconstructed with both algorithms (70 lesions). Read More

    Comparison of ultrasound shear wave elastography with magnetic resonance elastography and renal microvascular flow in the assessment of chronic renal allograft dysfunction.
    Acta Radiol 2017 Jan 1:284185117748488. Epub 2017 Jan 1.
    1 Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
    Background Monitoring of renal allograft function is essential for early identification of dysfunction and improvement of kidney transplant (KTX) outcome. Purpose To non-invasively assess renal stiffness in KTX recipients using ultrasound shear wave elastography (USE) in correlation with multifrequency magnetic resonance elastography (MRE), renal allograft function, and renal microvascular flow determined using a novel ultrasound microvascular imaging technique. Material and Methods This prospective study investigated 25 KTXs (functional KTX [FCT], n = 14; chronic KTX insufficiency [DYS], n = 11) in 20 KTX recipients (mean age = 43 ± 14 years). Read More

    Experimental studies on artifacts and tumor enhancement on gadoxetic acid-enhanced arterial phase liver MRI in a rabbit VX2 tumor model.
    Acta Radiol 2017 Jan 1:284185117747134. Epub 2017 Jan 1.
    1 Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan.
    Background Rapid injection of gadoxetic acid is reported to produce more frequent artifacts and lower vascular enhancement on arterial phase liver magnetic resonance imaging (MRI). However, its effect on tumor enhancement and the mechanism of the artifacts remain unclear. Purpose To evaluate the effect of rapid injection of gadoxetic acid on artifacts and tumor enhancement during arterial phase liver MRI, and on arterial blood gases (ABGs) which may explain the cause of the artifacts. Read More

    Follow-up interval for probably benign breast lesions on screening ultrasound in women at average risk for breast cancer with dense breasts.
    Acta Radiol 2017 Jan 1:284185117745906. Epub 2017 Jan 1.
    Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University, College of Medicine, Seoul, Republic of Korea.
    Background Women at high risk for breast cancer and women at average risk have different pretest probabilities. Probably benign lesions on screening ultrasound (US) should be assessed and managed differently for these two risk groups. Purpose To evaluate the effectiveness of short-term follow-up for probably benign lesions on screening US in women at average risk for breast cancer with dense breasts. Read More

    New concepts of radiologic preoperative evaluation of anterior shoulder instability: on-track and off-track lesions.
    Acta Radiol 2017 Jan 1:284185117745573. Epub 2017 Jan 1.
    2 Department of Radiology, 12334 UT Southwestern Medical Center, Dallas , TX, USA.
    The shoulder is the most frequently dislocated joint in the body due to a larger range of motion and a small area of articulation between the humeral and glenoid surfaces. Traumatic shoulder dislocations, especially those associated with injury to the labroligamentous or bony stabilizers of the joint, lead to further reduction of articular surface contact with resultant glenohumeral instability and recurrent shoulder dislocations. Imaging plays an increasingly important role in the preoperative evaluation of patients with traumatic shoulder instability by evaluating glenohumeral bone loss (uni- or bipolar), assessing soft tissue injuries and identifying patients at risk of postoperative recurrence. Read More

    Lymphatic drainage efficiency: a new parameter of lymphatic function.
    Acta Radiol 2017 Jan 1:284185117744226. Epub 2017 Jan 1.
    Department of Nuclear Medicine, 1949 Brighton and Sussex University Hospitals NHS Trust , Brighton, UK.
    Background Following convection from blood capillaries, plasma proteins are transported to loco-regional lymph nodes in two stages: first, uptake into peripheral lymphatics, and second, transport to nodes. Purpose To introduce a new parameter of lymphatic function that quantifies stage 2 - lymphatic drainage efficiency (LDE). Material and Methods Percentage injected activity (IIQ) in ilio-inguinal nodes 150 min following subcutaneous foot web-space injection of Tc-99 m-nanocolloid was measured in 102 patients undergoing lymphoscintigraphy using a method in which a standard is placed by image guidance over the nodes. Read More

    Treatment of acute portomesenteric venous thrombosis with thrombectomy through a transjugular intrahepatic portosystemic shunt: a single-center experience.
    Acta Radiol 2017 Jan 1:284185117742683. Epub 2017 Jan 1.
    3 Department of Radiology, Oncology and Radiation Science, Section of Interventional Radiology, Uppsala University Hospital, Uppsala, Sweden.
    Background Acute portomesenteric venous thrombosis (PMVT) is a potentially life-threatening condition and urgent treatment is required. Purpose To retrospectively evaluate the efficacy and safety of treating acute PMVT by the creation of a transjugular intrahepatic portosystemic shunt (TIPS) followed by thrombectomy. Material and Methods Six patients (all men, age range = 39-51 years) presenting with acute PMVT were treated with transjugular thrombectomy (TT) through a TIPS created in the same session. Read More

    Fourth update on CT angiography of coronary stents: in vitro evaluation of 24 novel stent types.
    Acta Radiol 2017 Jan 1:284185117744227. Epub 2017 Jan 1.
    1 Department of Radiology, University Hospital of Cologne, Cologne, Germany.
    Background Non-invasive evaluation of coronary stent patency by coronary computed tomography angiography (cCTA) remains challenging. Multiple studies showed that CT technology but also individual stent design strongly influence the assessability of coronary stents by cCTA. Purpose To expand the available data on cCTA characteristics of coronary stents by 24 novel types to help interpreting examinations of patients after stent placement and selecting which stents are suitable for assessment by cCTA. Read More

    Diagnostic performances and interobserver agreement according to observer experience: a comparison study using three guidelines for management of thyroid nodules.
    Acta Radiol 2017 Jan 1:284185117744001. Epub 2017 Jan 1.
    1 Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea.
    Background The differences regarding categorization of thyroid nodules among different guidelines may affect the diagnostic performances and agreement among observers. Purpose To compare the diagnostic performances and agreements between observers with various degree of experience when applying different guidelines for stratifying thyroid nodules using suspicious ultrasonography (US) features. Material and Methods This retrospective study included 370 thyroid nodules (≥10 mm). Read More

    Disproportionate fluid sign as an aid in diagnosing high-grade bursal-sided supraspinatus tendon tear.
    Acta Radiol 2017 Jan 1:284185117744589. Epub 2017 Jan 1.
    1 Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea.
    Background Deep, high-grade bursal-sided supraspinatus tendon tears are sometimes preoperatively misinterpreted as full-thickness tears on shoulder magnetic resonance imaging (MRI). Purpose To determine the usefulness of disproportionate fluid sign for differentiating high-grade bursal-sided partial-thickness tears from full-thickness tears on conventional MRI. Material and Methods Preoperative MRIs of 198 patients with arthroscopically confirmed high-grade bursal-sided partial-thickness tears and full-thickness tears were independently reviewed by two readers on two occasions. Read More

    Comparison of automated volumetry of the hippocampus using NeuroQuant® and visual assessment of the medial temporal lobe in Alzheimer's disease.
    Acta Radiol 2017 Jan 1:284185117743778. Epub 2017 Jan 1.
    1 Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.
    Background Different clinically feasible methods for evaluation of medial temporal lobe atrophy exists and are useful in diagnostic work-up of Alzheimer's disease (AD). Purpose To compare the diagnostic properties of two clinically available magnetic resonance imaging (MRI)-based methods-an automated volumetric software, NeuroQuant® (NQ) (evaluation of hippocampus volume) and the Scheltens scale (visual evaluation of medial temporal lobe atrophy [MTA])-in patients with AD dementia, and subjective and mild cognitive impairment (non-dementia). Material and Methods MRIs from 56 patients (31 AD, 25 non-dementia) were assessed with both methods. Read More

    Investigation of cerebrospinal fluid flow in the cerebral aqueduct using high-resolution phase contrast measurements at 7T MRI.
    Acta Radiol 2017 Jan 1:284185117740762. Epub 2017 Jan 1.
    2 Department of Diagnostic Radiology, Lund University, Skåne University Hospital, Lund, Sweden.
    Background The cerebral aqueduct is a central conduit for cerebrospinal fluid (CSF), and non-invasive quantification of CSF flow in the aqueduct may be an important tool for diagnosis and follow-up of treatment. Magnetic resonance (MR) methods at clinical field strengths are limited by low spatial resolution. Purpose To investigate the feasibility of high-resolution through-plane MR flow measurements (2D-PC) in the cerebral aqueduct at high field strength (7T). Read More

    Core needle biopsy of thyroid nodules: outcomes and safety from a large single-center single-operator study.
    Acta Radiol 2017 Jan 1:284185117741916. Epub 2017 Jan 1.
    Department of Radiology and the Research Institute of Radiology, University of Ulsan College of Medicine, 65526 Asan Medical Center , Seoul, Republic of Korea.
    Background There currently remains a debate over the use of core needle biopsy (CNB) or fine needle aspiration (FNA) for diagnosis of thyroid nodules. The major drawbacks of previous CNB studies include heterogeneity of the study population, variable techniques, devices, and operator experience affecting the outcome of the procedure. Purpose To assess the diagnostic performance and safety of CNB of thyroid nodules performed by a single experienced operator in consecutive patients. Read More

    Optimization of T2-weighted imaging for shoulder magnetic resonance arthrography by synthetic magnetic resonance imaging.
    Acta Radiol 2017 Jan 1:284185117740761. Epub 2017 Jan 1.
    1 Department of Radiology, Research Institute of Radiological Science, YUHS-KRIBB Medical Convergence Research Institute, and Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
    Background Synthetic magnetic resonance imaging (MRI) allows reformatting of various synthetic images by adjustment of scanning parameters such as repetition time (TR) and echo time (TE). Optimized MR images can be reformatted from T1, T2, and proton density (PD) values to achieve maximum tissue contrast between joint fluid and adjacent soft tissue. Purpose To demonstrate the method for optimization of TR and TE by synthetic MRI and to validate the optimized images by comparison with conventional shoulder MR arthrography (MRA) images. Read More

    Preoperative quantitative dynamic contrast-enhanced MRI and diffusion-weighted imaging predict aggressive disease in endometrial cancer.
    Acta Radiol 2017 Jan 1:284185117740932. Epub 2017 Jan 1.
    1 Department of Radiology, Haukeland University Hospital, Bergen, Norway.
    Background Quantitative dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and diffusion-weighted imaging (DWI) may yield preoperative tumor biomarkers relevant for prognosis and therapy in cancer. Purpose To explore the value of preoperative DCE-MRI and DWI for the prediction of aggressive disease in endometrial cancer patients. Material and Methods Preoperative MRI (1. Read More

    Quality of life after endovascular sclerotherapy of low-flow venous malformations: the efficacy of polidocanol compared with ethanol.
    Acta Radiol 2017 Jan 1:284185117741774. Epub 2017 Jan 1.
    1 Department of Otorhinolaryngology, Kokkola Central Hospital, Kokkola, Finland.
    Background Limited information is available on mid-term results and quality of life (QOL) after endovascular sclerotherapy of venous malformations. Purpose To compare two agents-polidocanol and ethanol-with a focus on the influence on QOL after sclerotherapy. Material and Methods Forty-one consecutive patients with a venous malformation in the head and neck area or in the extremities were treated with polidocanol between 2008 and 2013. Read More

    Susceptibility of iodine concentration map of dual-energy contrast-enhanced digital mammography for quantitative and tumor enhancement assessment.
    Acta Radiol 2017 Jan 1:284185117740760. Epub 2017 Jan 1.
    1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan.
    Background Dual-energy (DE) contrast-enhanced digital mammography (DE-CEDM) provides additional information on tumor angiogenesis. Purpose To investigate the susceptibility of reconstructing color-coded iodine concentration maps on the basis of quantitative calibrations of the iodine concentration and contrast-to-noise ratio (CNR) in DE-CEDM applications. Material and Methods A custom-made phantom filled with iodine concentrations in the range of 0. Read More

    Effects of contrast-enhancement on diffusion weighted imaging and apparent diffusion coefficient measurements in 3-T magnetic resonance imaging of breast lesions.
    Acta Radiol 2017 Jan 1:284185117740759. Epub 2017 Jan 1.
    Department of Radiological, Oncological and Pathological Sciences, University of Rome "Sapienza," Rome, Italy.
    Background The effect of gadolinium-based contrast agents on diffusion-weighted imaging (DWI) measurements of breast lesions is still not clear. Purpose To investigate gadolinium effects on DWI and apparent diffusion coefficient (ADC) in breast lesions and normal parenchyma with 3 Tesla contrast-enhanced MRI. Material and Methods Pre- and post-contrast DWI (b = 0 and b = 1000 s/mm2) were acquired in 47 patients. Read More

    High-pitch dual-source paranasal sinus CT in agitated patients with maxillofacial trauma: analysis of image quality, motion artifacts, and dose aspects.
    Acta Radiol 2017 Jan 1:284185117740931. Epub 2017 Jan 1.
    1 Department of Diagnostic and Interventional Radiology, Clinic of the Goethe University Frankfurt, Frankfurt am Main, Germany.
    Background Image quality benefits from high-pitch scanning in agitated patients by reducing acquisition time. Purpose To compare image quality and exposure parameters in patients with maxillofacial trauma on second- and third-generation dual-source computed tomography (DSCT). Material and Methods Four groups were compared. Read More

    Can imaging kinetic parameters of dynamic contrast-enhanced magnetic resonance imaging be valuable in predicting clinicopathological prognostic factors of invasive breast cancer?
    Acta Radiol 2017 Jan 1:284185117740746. Epub 2017 Jan 1.
    1 Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
    Background Intrinsic molecular profiling of breast cancer provides clinically relevant information that helps tailor therapy directed to the specific tumor subtype. We hypothesized that dynamic contrast-enhanced MRI (DCE-MRI) derived quantitative kinetic parameters (CD-QKPs) may help predict molecular tumor profiles non-invasively. Purpose To determine the association between DCE-MRI (CD-QKPs) and breast cancer clinicopathological prognostic factors. Read More

    Differentiation between papillary renal cell carcinoma and fat-poor angiomyolipoma: a preliminary study assessing detection of intratumoral hemorrhage with chemical shift MRI and T2*-weighted gradient echo.
    Acta Radiol 2017 Jan 1:284185117723371. Epub 2017 Jan 1.
    1 Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea.
    Background Recent literature suggests that intratumoral hemorrhage detection may be helpful in differentiating papillary renal cell carcinoma (pRCC) from fat-poor angiomyolipoma (fpAML). Purpose To determine whether intratumoral hemorrhage detected using chemical shift magnetic resonance imaging (MRI) and T2*-weighted (T2*W) gradient echo (GRE) can be used to differentiate pRCC from fpAML. Material and Methods This retrospective study included 42 patients with pRCC (n = 28) and fpAML (n = 14) who underwent MRI followed by surgery. Read More

    Diagnostic performance of advanced modeled iterative reconstruction applied images for detecting urinary stones on submillisievert low-dose computed tomography.
    Acta Radiol 2017 Jan 1:284185117738548. Epub 2017 Jan 1.
    2 Department of CT research collaborations, SIEMENS Healthcare Ltd., Poongsan Building, Seoul, Republic of Korea.
    Background Repeated computed tomography (CT) scans may be an issue in young adults with urinary stones. Therefore, it is important to know how far the dose can be reduced while maintaining the diagnostic performance. Purpose To generate a hypothesis that it is feasible to decrease the radiation dose to a sub-millisievert (mSv) level with the addition of advanced modeled iterative reconstruction (ADMIRE) while maintaining the sensitivity to standard-dose CT (SDCT) for the detection of urinary stones. Read More

    Diffusion-weighted MRI combined with susceptibility-weighted MRI: added diagnostic value for four common lateral ventricular tumors.
    Acta Radiol 2017 Jan 1:284185117738562. Epub 2017 Jan 1.
    Department of Radiology, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, PR China.
    Background Diffusion-weighted imaging (DWI) and susceptibility-weighted imaging (SWI) are reliable imaging modalities for brain tumors. However, the role of DWI and SWI in the diagnosis of common lateral ventricular tumors has not been systematically evaluated. Purpose To evaluate the diagnostic performance of DWI and SWI in common lateral ventricular tumors. Read More

    Safety and effectiveness of transarterial embolization for splenic artery hemorrhage in patients undergoing radical gastrectomy.
    Acta Radiol 2017 Jan 1:284185117738561. Epub 2017 Jan 1.
    1 Department of Radiology, 54678 Severance Hospital , Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea.
    Background Perigastric lymph nodes are dissected during gastrectomy, potentially resulting in life-threatening postoperative bleeding. Purpose To evaluate the safety and effectiveness of transarterial embolization (TAE) for bleeding from the splenic artery in patients who underwent gastrectomy. Material and Methods Between January 2004 and December 2016, 14,523 patients underwent gastrectomy at our institution, and ten patients (nine men; mean age = 64. Read More

    Decreased background parenchymal enhancement of the contralateral breast after two cycles of neoadjuvant chemotherapy is associated with tumor response in HER2-positive breast cancer.
    Acta Radiol 2017 Jan 1:284185117738560. Epub 2017 Jan 1.
    1 Department of Radiology, Fudan University Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China.
    Background Several recent studies have focused on the association between background parenchymal enhancement (BPE) and tumor response to neoadjuvant chemotherapy (NAC), but early prediction of tumor response based on BPE has yet not been investigated. Purpose To retrospectively investigate whether changes in the BPE of the contralateral breast following NAC could help predict tumor response in early stage HER2-positive breast cancer. Material and Methods Data from 71 patients who were diagnosed with unilateral HER2 positive breast cancer and then underwent NAC with trastuzumab before surgery were analyzed retrospectively. Read More

    Postpartum hemorrhage from non-uterine arteries: clinical importance of their detection and the results of selective embolization.
    Acta Radiol 2017 Jan 1:284185117738547. Epub 2017 Jan 1.
    2 Department of Radiology, 65633 Seoul Metropolitan Government Seoul National University Boramae Medical Center , Seoul, Republic of Korea.
    Background Identification of the source of postpartum hemorrhage (PPH) is important for embolization because PPH frequently originates from non-uterine arteries. Purpose To evaluate the clinical importance of identifying the non-uterine arteries causing the PPH and the results of their selective embolization. Material and Methods This retrospective study enrolled 59 patients who underwent embolization for PPH from June 2009 to July 2016. Read More

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