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https://www.readbyqxmd.com/read/29774382/iodine-material-density-images-in-dual-energy-ct-quantification-of-contrast-uptake-and-washout-in-hcc
#1
Daniela Pfeiffer, Anushri Parakh, Manuel Patino, Avinash Kambadakone, Ernst J Rummeny, Dushyant V Sahani
PURPOSE: To determine the diagnostic potential of Material Density (MD) iodine images in dual-energy CT (DECT) for visualization and quantification of arterial phase hyperenhancement and washout in hepatocellular carcinomas compared to magnetic resonance imaging (MRI). MATERIALS AND METHODS: The study complied with HIPAA guidelines and was approved by the ethics committee of the institutional review board. Thirty-one patients (23 men, 8 women; age range, 36-87 years) with known or suspected Hepatocellular Carcinoma (HCC) were included...
May 17, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29770766/histogram-pattern-analysis-of-the-lung-perfused-blood-volume-for-assessment-of-pulmonary-thromboembolism
#2
Munemasa Okada, Takafumi Nomura, Yoshiteru Nakashima, Yoshie Kunihiro, Shoji Kido
PURPOSE: We aimed to evaluate the usefulness of histograms of lung perfused blood volume (HLPBV) based on the presence of pulmonary thromboembolism (PTE) and the pulmonary embolic burden. METHODS: A total of 168 patients (55 males; mean age, 62.9 years) underwent contrast-enhanced dual-energy computed tomography (DECT) between January 1 2012 and October 31 2014. Initial DECT images were three-dimensionally reconstructed, and the HLPBV patterns were divided into three types, including the symmetric type (131 patients, 78...
May 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29754001/spatial-and-temporal-variability-of-personal-environmental-exposure-to-radio-frequency-electromagnetic-fields-in-children-in-europe
#3
Laura Ellen Birks, Benjamin Struchen, Marloes Eeftens, Luuk van Wel, Anke Huss, Peter Gajšek, Leeka Kheifets, Mara Gallastegi, Albert Dalmau-Bueno, Marisa Estarlich, Mariana F Fernandez, Inger Kristine Meder, Amparo Ferrero, Ana Jiménez-Zabala, Maties Torrent, Tanja G M Vrijkotte, Elisabeth Cardis, Jørn Olsen, Blaž Valič, Roel Vermeulen, Martine Vrijheid, Martin Röösli, Mònica Guxens
BACKGROUND: Exposure to radiofrequency electromagnetic fields (RF-EMF) has rapidly increased and little is known about exposure levels in children. This study describes personal RF-EMF environmental exposure levels from handheld devices and fixed site transmitters in European children, the determinants of this, and the day-to-day and year-to-year repeatability of these exposure levels. METHODS: Personal environmental RF-EMF exposure (μW/m2 , power flux density) was measured in 529 children (ages 8-18 years) in Denmark, the Netherlands, Slovenia, Switzerland, and Spain using personal portable exposure meters for a period of up to three days between 2014 and 2016, and repeated in a subsample of 28 children one year later...
May 10, 2018: Environment International
https://www.readbyqxmd.com/read/29742537/-combining-old-and-new-conventional-radiography-and-dect-for-diagnosing-cppd
#4
Joe Thomas, Kurian Ninan
No abstract text is available yet for this article.
May 4, 2018: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/29728814/improved-visualisation-of-early-cerebral-infarctions-after-endovascular-stroke-therapy-using-dual-energy-computed-tomography-oedema-maps
#5
Astrid Ellen Grams, Tanja Djurdjevic, Rafael Rehwald, Thomas Schiestl, Florian Dazinger, Ruth Steiger, Michael Knoflach, Elke Ruth Gizewski, Bernhard Glodny
OBJECTIVE: The aim was to investigate whether dual-energy computed tomography (DECT) reconstructions optimised for oedema visualisation (oedema map; EM) facilitate an improved detection of early infarctions after endovascular stroke therapy (EST). METHODS: Forty-six patients (21 women; 25 men; mean age: 63 years; range 24-89 years) were included. The brain window (BW), virtual non-contrast (VNC) and modified VNC series based on a three-material decomposition technique optimised for oedema visualisation (EM) were evaluated...
May 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29725712/diagnostic-accuracy-of-dual-energy-ct-in-gout-a-systematic-review-and-meta-analysis
#6
REVIEW
Zhange Yu, Tianli Mao, Yaping Xu, Tengqi Li, Yanhua Wang, Fuqiang Gao, Wei Sun
OBJECTIVE: Dual-energy CT (DECT) is being widely used in suspected gout patients in recent years. Many clinicians tend to use DECT instead of aspiration biopsy in the diagnosis of gout, but its accuracy has shown controversial results. In this systematic review and meta-analysis, we sought to evaluate the accuracy of DECT in the diagnosis of gout. MATERIALS AND METHODS: We performed a systematic review of the literature published in Medline, Embase, PubMed, and Cochrane databases...
May 3, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29721694/current-status-of-ultrasound-and-dual-energy-computed-tomography-in-the-evaluation-of-gout
#7
REVIEW
Hillary W Garner, Daniel E Wessell
Gout is the most common inflammatory arthritis and is increasing in relevance due to its rising prevalence and incidence. Dual-energy CT (DECT) and ultrasound (US) are the most frequently used imaging modalities for the diagnosis of gout and for the follow-up of patients receiving therapy. Although DECT has the highest diagnostic accuracy for gout and shows consistently excellent reader agreement in the assessment of urate deposition change after therapy, US also performs well and remains just as important an imaging tool in these realms due to its practical advantages in cost, availability, and safety...
May 2, 2018: Rheumatology International
https://www.readbyqxmd.com/read/29702022/acute-gouty-knee-arthritis-ultrasound-findings-compared-with-dual-energy-ct-findings
#8
S Strobl, E J Halpern, M Abd Ellah, C Kremser, J Gruber, R Bellmann-Weiler, C Deml, A Schmalzl, S Rauch, A S Klauser
OBJECTIVE: The purpose of this study was to compare findings of ultrasound (US) with dual-energy CT (DECT) findings in patients presenting with suspected gouty knee arthritis. SUBJECTS AND METHODS: This prospective study included 65 patients (52 men and 13 women; median age, 61.7 years [range, 38-87 years]) with an initial clinical diagnosis of acute gouty knee arthritis who underwent DECT performed using a 128-MDCT scanner and US performed using a 5-18-MHz transducer...
April 27, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29699711/the-utility-of-dual-energy-ct-for-metal-artifact-reduction-from-intracranial-clipping-and-coiling
#9
D Mera Fernández, E Santos Armentia, A Bustos Fiore, A M Villanueva Campos, E Utrera Pérez, M Souto Bayarri
OBJECTIVE: To assess the ability of dual-energy CT (DECT) to reduce metal-related artifacts in patients with clips and coils in head CT angiography, and to analyze the differences in this reduction between both type of devices. MATERIALS AND METHODS: Thirteen patients (6 clips, 7 coils) were selected and retrospectively analized. Virtual monoenergetic images (MEI) with photon energies from 40 to 150 keV were obtained. Noise was measured at the area of maximum artifact...
April 23, 2018: Radiología
https://www.readbyqxmd.com/read/29698943/the-concentration-of-iodine-in-perigastric-adipose-tissue-a-novel-index-for-the-assessment-of-serosal-invasion-in-patients-with-gastric-cancer-after-neoadjuvant-chemotherapy
#10
Li Yang, Yong Li, Gao-Feng Shi, Tao Zhou, Bi-Bo Tan
OBJECTIVE: This study aims to explore the association between iodine concentration (IC) in perigastric adipose tissue (PAT), quantified by dual-energy computed tomography (DECT) and serosal invasion (SI) in patients with gastric cancer post-neoadjuvant chemotherapy (NAC). METHODS: Forty-three patients with T4-staged gastric cancer were enrolled. IC and standardized IC in PAT (ICPAT and SICPAT) were quantified by DECT pre and post NAC. A postoperative pathologic examination was performed to stage gastric cancer...
April 26, 2018: Digestion
https://www.readbyqxmd.com/read/29688745/evaluation-of-dual-energy-computed-tomography-iodine-mapping-within-the-myocardial-blood-pool-for-detection-of-acute-myocardial-infarction-correlation-with-histopathological-findings-in-a-porcine-model
#11
Kai Sun, Ruijuan Han, Ruiping Zhao, Shuancheng Bai, Junyan Wang, Jiang Hu, Bin Lu
OBJECTIVE: We assessed the diagnostic value of "one-step" dual energy CT (DECT) in combination with coronary CT angiography and iodine mapping within the myocardial blood pool in detecting acute myocardial infarction (AMI). METHODS: Five minipigs were subjected to transcatheter embolization of coronary artery with a gelatin sponge to induce AMI. Arterial-phase myocardial DECT imaging was carried out 1 h before and 24 h after embolism of the coronary...
May 11, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29685522/rapid-switching-kvp-dual-energy-ct-value-of-reconstructed-dual-energy-ct-images-and-organ-dose-assessment-in-multiphasic-liver-ct-exams
#12
Usman Mahmood, Natally Horvat, Joao Vicente Horvat, Davinia Ryan, Yiming Gao, Gabriella Carollo, Rommel DeOcampo, Richard K Do, Seth Katz, Scott Gerst, C Ross Schmidtlein, Lawrence Dauer, Yusuf Erdi, Lorenzo Mannelli
PURPOSE: Clinical applications of dual energy computed tomography (DECT) have been widely reported; however, the importance of the different image reconstructions and radiation organ dose remains a relevant area of investigation, particularly considering the different commercially available DECT equipment. Therefore, the purpose of this study was to assess the image reliability and compare the information content between several image reconstructions in a rapid-switching DECT (rsDECT), and assess radiation organ dose between rsDECT and conventional single-energy computed tomography (SECT) exams...
May 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29680487/spectrum-of-chronic-complications-related-to-silicone-leakage-and-migration
#13
Alexander J Ryu, Katrina N Glazebrook, Naziya Samreen, Philippe R Bauer, Eunhee S Yi, Jay H Ryu
BACKGROUND: Medical silicone is widely used as implants and free injections but the spectrum of complications related to migration or embolization of silicone remains unclear. METHODS: We retrospectively reviewed 79 patients with silicone migration as confirmed on pathology between January 1, 2001 and December 31, 2016. The presenting clinical and imaging features, diagnostic testing, treatment, and outcome were assessed. RESULTS: Nearly all were women and 43% had a history of breast cancer...
April 19, 2018: American Journal of Medicine
https://www.readbyqxmd.com/read/29679500/a-unified-material-decomposition-framework-for-quantitative-dual-and-triple-energy-ct-imaging
#14
Wei Zhao, Don Vernekohl, Fei Han, Bin Han, Hao Peng, Yong Yang, Lei Xing, James K Min
PURPOSE: Many clinical applications depend critically on the accurate differentiation and classi-fication of different types of materials in patient anatomy. This work introduces a unified framework for accurate nonlinear material decomposition and applies it, for the first time, in the concept of triple-energy CT (TECT) for enhanced material differentiation and classification as well as dual-energy CT METHODS: We express polychromatic projection into a linear combination of line integrals of material-selective images...
April 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29679212/diagnostic-performance-of-dual-energy-ct-for-the-detection-of-bone-marrow-oedema-a-systematic-review-and-meta-analysis
#15
Chong Hyun Suh, Seong Jong Yun, Wook Jin, Sun Hwa Lee, So Young Park, Chang-Woo Ryu
OBJECTIVES: The aim of this systematic review and meta-analysis was to assess the sensitivity and specificity of dual-energy CT (DECT) for the detection of bone marrow oedema (BME). METHODS: An electronic search of the PubMed and EMBASE databases was conducted. Bivariate modelling and hierarchical summary receiver-operating characteristic modelling were performed to evaluate the overall diagnostic performance of DECT for BME. Subgroup analysis was performed according to the assessment type (qualitative vs...
April 20, 2018: European Radiology
https://www.readbyqxmd.com/read/29679210/gout-of-hand-and-wrist-the-value-of-us-as-compared-with-dect
#16
Andrea S Klauser, Ethan J Halpern, Sylvia Strobl, Mohamed M H Abd Ellah, Johann Gruber, Rosa Bellmann-Weiler, Thomas Auer, Gudrun Feuchtner, Werner Jaschke
OBJECTIVES: The purpose of this study was to compare findings of ultrasound (US) with dual-energy CT (DECT) in patients presenting with suspected gouty hand and wrist arthritis. METHODS: This prospective study included 180 patients (136 men and 44 women, age range, 31- 94 years; mean age, 65.9 years) with an initial clinical diagnosis of acute gouty arthritis who underwent DECT and US examination. Intra- and extra-articular findings of each modality were tabulated and calculated with DECT as gold standard...
April 20, 2018: European Radiology
https://www.readbyqxmd.com/read/29678187/an-unexpected-cause-of-sacroiliitis-in-a-patient-with-gout-and-chronic-psoriasis-with-inflammatory-arthritis-a-case-report
#17
Safi Alqatari, Roberta Visevic, Nina Marshall, John Ryan, Grainne Murphy
BACKGROUND: Inflammatory back pain is a condition characterized by inflammation of the sacroiliac joints and lower spine. It is frequently seen in patients with spondyloarthropathies like ankylosing spondylitis, psoriatic arthritis, enteropathic arthritis and reactive arthritis. Inflammatory back pain can be caused by many other conditions like infection and crystal deposition such as gout. In this case, it is difficult to specifically identify gout as a cause by ordinary imaging like magnetic resonance imaging (MRI) or ultrasound...
April 20, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29676347/dual-energy-computed-tomography-a-reliable-and-established-tool-for-in-vivo-differentiation-of-uric-acid-from-nonuric-acid-renal-stones
#18
Mohd Ilyas, Ghanshyam Dev, Anchal Gupta, Tameem Ahmad Bhat, Shwait Sharma
Background: Dual-energy computed tomography (DECT) utilises the technique of simultaneous image acquisition of a body part at two different energy levels of the X-ray tubes. We used the DECT in this project to study its accuracy in non-invasive in vivo differentiation of uric acid (UA) calculi from non-UA calculi using the 3rd generation dual-source computed tomography (CT) scanner. Materials and Methods: The DECT ratios of the various stones were noted and compared with the postextraction analysis of stones for composition...
January 2018: Nigerian Postgraduate Medical Journal
https://www.readbyqxmd.com/read/29674804/three-material-decomposition-in-multi-energy-ct-impact-of-prior-information-on-noise-and-bias
#19
Liqiang Ren, Cynthia H McCollough, Lifeng Yu
In order to perform material decomposition for a three-material mixture, dual-energy CT (DECT) has to incorporate an additional condition, typically the prior information related to certain physical constraints such as volume or mass conservation. With the introduction of photon-counting CT and other multi-energy CT (MECT) platform, more than 2 energy bins can be simultaneously acquired, which in principle can solve a three-material problem without the need of additional prior information. The purpose of this work was to investigate the impact of prior information on noise and bias properties of three-material decomposition in both DECT and MECT, and to evaluate if the prior information is still needed in MECT...
March 2018: Proceedings of SPIE
https://www.readbyqxmd.com/read/29658786/imaging-findings-of-mammary-and-systemic-silicone-deposition-secondary-to-breast-implants
#20
Naziya Samreen, Katrina N Glazebrook, Asha Bhatt, Sudhakar K Venkatesh, Brendan P McMenomy, Anupam Chandra, Shuai Ieng, Kalie E Adler, Cynthia H McCollough
In patients with silicone breast implants, implant rupture can occur, which can be intracapsular or extracapsular. Following implant rupture, silicone can travel through the lymphatic system into regional and distant lymph nodes. The purpose of this pictorial essay is to present findings of silicone implant rupture with intramammary and systemic silicone deposition as seen on dual energy CT (DECT), US, mammogram, PET/CT and MRI. We include imaging findings of silicone deposition in the breast in cases of intracapsular and extracapsular rupture...
April 16, 2018: British Journal of Radiology
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