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https://www.readbyqxmd.com/read/29780288/the-assessment-of-carbon-dioxide-automated-angiography-in-type-ii-endoleaks-detection-comparison-with-contrast-enhanced-ultrasound
#1
Chiara Mascoli, Gianluca Faggioli, Enrico Gallitto, Vincenzo Vento, Giuseppe Indelicato, Rodolfo Pini, Andrea Vacirca, Andrea Stella, Mauro Gargiulo
Introduction: Iodinated contrast media completion angiography (ICM-A) may underestimate the presence of type II endoleak (ELII) after endovascular aortic repair (EVAR), particularly if they are at low flow. Contrast-enhanced ultrasound (CEUS) has been proposed as the gold standard in ELII detection during EVAR follow-up. Intraprocedural carbon dioxide (CO2 ) angiography has been shown to be useful in this setting; however no comparative studies including these three techniques are currently available...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29779857/factors-affecting-the-incidence-of-contrast-induced-nephropathy-in-patients-undergoing-computed-tomography
#2
M Heras Benito, M Garrido Blázquez, Y Gómez Sanz, M Bernardez Mardomingo, J Ruiz Cacho, F J Rodríguez Recio, M J Fernández-Reyes Luis
OBJECTIVE: To analyze the incidence of contrast-induced nephropathy in a cohort of patients undergoing computed tomography (CT) with intravenous iodinated contrast material. To evaluate the efficacy of N-acetylcysteine in preventing contrast-induced nephropathy. PATIENTS AND METHODS: This prospective observational study was carried out in the months comprising March 2016 through July 2016. We selected the first five patients scheduled to undergo CT examination each day who agreed to participate and signed the informed consent form...
May 17, 2018: Radiología
https://www.readbyqxmd.com/read/29779153/intraoperative-stent-segmentation-in-x-ray-fluoroscopy-for-endovascular-aortic-repair
#3
Katharina Breininger, Shadi Albarqouni, Tanja Kurzendorfer, Marcus Pfister, Markus Kowarschik, Andreas Maier
PURPOSE: Fusion of preoperative data with intraoperative X-ray images has proven the potential to reduce radiation exposure and contrast agent, especially for complex endovascular aortic repair (EVAR). Due to patient movement and introduced devices that deform the vasculature, the fusion can become inaccurate. This is usually detected by comparing the preoperative information with the contrasted vessel. To avoid repeated use of iodine, comparison with an implanted stent can be used to adjust the fusion...
May 19, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29774382/iodine-material-density-images-in-dual-energy-ct-quantification-of-contrast-uptake-and-washout-in-hcc
#4
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/29772311/mid-term-outcomes-of-endovascular-aortic-aneurysm-repair-with-carbon-dioxide-guided-angiography
#5
Yuriko Takeuchi, Noriyasu Morikage, Yutaro Matsuno, Tamami Nakamura, Makoto Samura, Koshiro Ueda, Takasuke Harada, Yoshitaka Ikeda, Kotaro Suehiro, Hiroshi Ito, Kensuke Sakata, Kimikazu Hamano
BACKGROUND: Although iodinated contrast (IC) agents are commonly used in endovascular aneurysm repair (EVAR), perioperative use in patients with renal dysfunction or IC allergies is avoided. Carbon dioxide (CO2 )-guided angiography is a promising alternative. We aimed to evaluate short-term and mid-term outcomes of EVAR using CO2 -guided angiography. METHODS: Three hundred and eighty-one patients who underwent EVAR from January 2012 to September 2016 were retrospectively reviewed and divided into an IC-EVAR group (n=351) and CO2 -EVAR group (n=30)...
May 14, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29771756/thyrotropin-receptor-antibodies-an-overview
#6
Anupam Kotwal, Marius Stan
PURPOSE: Thyroid autoimmunity affects approximately 5% of the population, and its investigation relies heavily on the use of autoantibodies. Thyroid stimulating hormone receptor (TSHR) autoantibodies (TRAb) play a central role in the evaluation of Graves disease (GD), Graves ophthalmopathy (GO) and pretibial myxedema (PTM). However, there is still controversy regarding overall TRAb assay diagnostic accuracy and their prognostic utility. METHODS: We reviewed and analyzed the literature reporting TRAb assays and their clinical utility...
May 2, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29770709/lessons-learned-from-the-preserve-trial
#7
Sasan Partovi, Thomas Trischman, Preet S Kang
The recently published PRESERVE trial is presently the largest and most comprehensive clinical trial comparing commonly applied strategies for prevention of iodinated contrast-induced acute kidney injury in high-risk patients. The fundamental conclusion of the PRESERVE trial is that oral acetylcysteine and intravenous sodium bicarbonate are not superior to simple intravenous hydration with isotonic saline for the prevention of contrast-induced renal sequelae. In this commentary, we discuss the results in the context of selected past major trials, and provide insights into the strengths and potential weaknesses of the PRESERVE trial...
May 17, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29767782/factfinders-for-patient-safety-are-gadolinium-based-contrast-media-safe-alternatives-to-iodinated-contrast-agents-for-the-safe-performance-of-spinal-injection-procedures
#8
Adrian Popescu, Jaymin Patel, Zachary L McCormick, Timothy P Maus, Meghan Rodes, David R Walega, Clark C Smith
No abstract text is available yet for this article.
May 14, 2018: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29766463/predictive-factors-for-the-outcomes-of-initial-i-131-low-dose-ablation-therapy-to-japanese-patients-with-differentiated-thyroid-cancer
#9
Shinji Ito, Shingo Iwano, Katsuhiko Kato, Shinji Naganawa
OBJECTIVE: To identify prognostic factors associated with a low-iodine diet (LID) and the amount of remnant thyroid tissue in Japanese patients with differentiated thyroid cancer (DTC) who received initial I-131 remnant ablation (RAI) using a fixed low dose of I-131 (1110 MBq). PATIENTS AND METHODS: In this prospective study, we enrolled 45 patients. Patients were classified into a self-managed LID group and a strict LID group. We measured the urinary iodine concentration on the day of RAI after patients consumed LID for 2 weeks...
May 15, 2018: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29762257/evaluation-of-safety-guidelines-on-the-use-of-iodinated-contrast-material-conundrum-continued
#10
Estelle C Nijssen, Patty J Nelemans, Roger J Rennenberg, Vincent van Ommen, Joachim E Wildberger
OBJECTIVES: Recently, safety guidelines for the use of intravascular iodinated contrast material have been updated, and the recommended threshold for giving prophylaxis to prevent contrast-induced nephropathy (CIN) has been reduced to estimated glomerular filtration rate (eGFR) less than 30 mL/min/1.73 m. Data on this population in the context of CIN, especially evidence for efficacy of the recommendation of prophylactic intravenous hydration, are lacking. The aim of the current study was to test implicit assumptions underlying the guideline update: (1) patients with eGFR <30 mL/min/1...
May 14, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29752088/folic-acid-cysteamine-modified-gold-nanoparticle-as-a-nanoprobe-for-targeted-computed-tomography-imaging-of-cancer-cells
#11
Sara Khademi, Saeed Sarkar, Ali Shakeri-Zadeh, Neda Attaran, Sharmin Kharrazi, Mohammad Reza Ay, Hossein Ghadiri
Development of various cost-effective multifunctional nanoprobes for efficient targeted molecular imaging of tumors remains a great challenge in medicine. Herein, we report a simple method of forming folic acid-targeted multifunctional gold nanoparticles via cost-effective cysteamine as a template for tumor molecular computed tomography (CT) imaging technique. The formed multifunctional cysteamine-folic acid conjugated gold nanoparticles (FA-Cys-AuNPs) were characterized via different techniques. Colony assay, hematoxylin and eosin (H&E), MTT, and flow cytometry analysis were used to evaluate the cytocompatibility of the particles...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29749048/evaluation-of-projection-and-dual-energy-based-methods-for-metal-artifact-reduction-in-ct-using-a-phantom-study
#12
Zaiyang Long, Michael R Bruesewitz, David R DeLone, Jonathan M Morris, Kimberly K Amrami, Mark C Adkins, Katrina N Glazebrook, James M Kofler, Shuai Leng, Cynthia H McCollough, Joel G Fletcher, Ahmed F Halaweish, Lifeng Yu
OBJECTIVES: Both projection and dual-energy (DE)-based methods have been used for metal artifact reduction (MAR) in CT. The two methods can also be combined. The purpose of this work was to evaluate these three MAR methods using phantom experiments for five types of metal implants. MATERIALS AND METHODS: Five phantoms representing spine, dental, hip, shoulder, and knee were constructed with metal implants. These phantoms were scanned using both single-energy (SE) and DE protocols with matched radiation output...
May 10, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29743106/the-foam-study-is-hysterosalpingo-foam-sonography-hyfosy-a-cost-effective-alternative-for-hysterosalpingography-hsg-in-assessing-tubal-patency-in-subfertile-women-study-protocol-for-a-randomized-controlled-trial
#13
Joukje van Rijswijk, Nienke van Welie, Kim Dreyer, Machiel H A van Hooff, Jan Peter de Bruin, Harold R Verhoeve, Femke Mol, Kimiko A Kleiman-Broeze, Maaike A F Traas, Guido J J M Muijsers, Arentje P Manger, Judith Gianotten, Cornelia H de Koning, Aafke M H Koning, Neriman Bayram, David P van der Ham, Francisca P J M Vrouenraets, Michaela Kalafusova, Bob I G van de Laar, Jeroen Kaijser, Miriam F van Oostwaard, Wouter J Meijer, Frank J M Broekmans, Olivier Valkenburg, Lucy F van der Voet, Jeroen van Disseldorp, Marieke J Lambers, Henrike E Peters, Marit C I Lier, Cornelis B Lambalk, Madelon van Wely, Patrick M M Bossuyt, Jaap Stoker, Fulco van der Veen, Ben W J Mol, Velja Mijatovic
BACKGROUND: Tubal pathology is a causative factor in 20% of subfertile couples. Traditionally, tubal testing during fertility work-up is performed by hysterosalpingography (HSG). Hysterosalpingo-foam sonography (HyFoSy) is a new technique that is thought to have comparable accuracy as HSG, while it is less expensive and more patient friendly. HyFoSy would be an acceptable alternative for HSG, provided it has similar effectiveness in terms of patient outcomes. METHODS/DESIGN: We aim to compare the effectiveness and costs of management guided by HyFoSy or by HSG...
May 9, 2018: BMC Women's Health
https://www.readbyqxmd.com/read/29739328/a-novel-ultrafast-low-dose-computed-tomography-protocol-allows-concomitant-coronary-artery-evaluation-and-lung-cancer-screening
#14
Carlo Gaudio, Gennaro Petriello, Francesco Pelliccia, Alessandra Tanzilli, Alberto Bandiera, Gaetano Tanzilli, Francesco Barillà, Vincenzo Paravati, Massimo Pellegrini, Enrico Mangieri, Paolo Barillari
BACKGROUND: Cardiac computed tomography (CT) is often performed in patients who are at high risk for lung cancer in whom screening is currently recommended. We tested diagnostic ability and radiation exposure of a novel ultra-low-dose CT protocol that allows concomitant coronary artery evaluation and lung screening. METHODS: We studied 30 current or former heavy smoker subjects with suspected or known coronary artery disease who underwent CT assessment of both coronary arteries and thoracic area (Revolution CT, General Electric)...
May 8, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29737068/-application-of-low-concentration-contrast-agent-combined-double-low-dose-in-ct-pulmonary-angiography-for-pulmonary-embolism
#15
Lei Li, Fei Zhao, Yu-Mei Pu, Kai Zhang, Jin Pu, Yu-Ming Li, Wan-Lin Peng, Jin-Ge Zhang, Chun-Chao Xia, Zhen-Lin Li
OBJECTIVE: To investigate the feasibility of low concentration contrast agent combined double low dose in CT pulmonary angiography. METHODS: 60 patients with clinically suspected pulmonary embolism examed by CT pulmonary angiography (CTPA) were divided into two groups (experimental group: n =30,80 kV, 15 mL,320 mg I/mL;control group: n =30,120 kV,50 mL,370 mg I/mL). The average CT value of main right and left pulmonary arteries,lobar arteries was calculated. Imaging post processing techniques included curved plannar reconstruction (CPR),volume rendering (VR) and maximal intensity projection (MIP)...
March 2018: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29730738/short-term-reproducibility-of-radiomic-features-in-liver-parenchyma-and-liver-malignancies-on-contrast-enhanced-ct-imaging
#16
Thomas Perrin, Abhishek Midya, Rikiya Yamashita, Jayasree Chakraborty, Tome Saidon, William R Jarnagin, Mithat Gonen, Amber L Simpson, Richard K G Do
PURPOSE: To evaluate the short-term reproducibility of radiomic features in liver parenchyma and liver cancers in patients who underwent consecutive contrast-enhanced CT (CECT) with intravenous iodinated contrast within 2 weeks by chance. METHODS: The Institutional Review Board approved this HIPAA-compliant retrospective study and waived the requirement for patients' informed consent. Patients were included if they had a liver malignancy (liver metastasis, n = 22, intrahepatic cholangiocarcinoma, n = 10, and hepatocellular carcinoma, n = 6), had two consecutive CECT within 14 days, and had no prior or intervening therapy...
May 5, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29726404/feasibility-study-of-fe-sub-3-sub-o-sub-4-sub-tao-sub-x-sub-nanoparticles-as-a-radiosensitizer-for-proton-therapy
#17
Sang Hee Ahn, Nohyun Lee, Changhoon Choi, Sung Won Shin, Youngyih Han, Hee Chul Park
We investigated the feasibility of using multifunctional Fe3O4/TaOx (core/shell) nanoparticles, developed for use in contrast agents for computed tomography (CT) and magnetic resonance imaging (MRI), as dose-enhancing radiosensitizers. First, to verify the detectability of Fe3O4/TaOx nanoparticles in imaging, in vivo tests were conducted. Approximately 600 mg/kg of 19-nm-diameter Fe3O4/TaOx nanoparticles dispersed in phosphate-buffered saline was injected into the tail vein of six Balb/c mice used as tumour (4T1 mammary carcinoma cell) models...
May 4, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29715308/analysis-of-dual-energy-spectral-ct-and-pathological-grading-of-clear-cell-renal-cell-carcinoma-ccrcc
#18
Jinyan Wei, Jianhong Zhao, Xueling Zhang, Dan Wang, Wenjuan Zhang, Zhiping Wang, Junlin Zhou
OBJECTIVE: To discuss the dual energy spectral computer tomography (CT) imaging features of the pathological grading of clear cell renal cell carcinoma (ccRCC) and the correlation between spectral CT imaging features and pathology. MATERIALS AND METHODS: We performed analyses of 62 patients with confirmed diagnosis of ccRCC. All patients underwent non-enhanced CT and dual-phase (cortex phase, CP and parenchyma phase, PP) contrast-enhanced CT with dual energy spectral mode...
2018: PloS One
https://www.readbyqxmd.com/read/29714501/automatic-spectral-imaging-protocol-and-iterative-reconstruction-for-radiation-dose-reduction-in-typical-hepatic-hemangioma-computed-tomography-with-reduced-iodine-load-a-preliminary-study
#19
Wei Li, Aiyin Li, Bin Wang, Xiuyuan Niu, Xin Cao, Xinyi Wang, Hao Shi
OBJECTIVES: To evaluate the effect of automatic spectral imaging protocol selection (ASIS) and adaptive statistical iterative reconstruction (ASiR) technique in the reduction of radiation and contrast medium dose in typical hepatic hemangioma (HH) dual-energy spectral CT (DEsCT). METHODS: 62 patients with suspected HH were randomly divided into two groups equally: group A, conventional 120-kVp CT with standard iodine load; group B, DEsCT with ASIS technique and reduced iodine load, two sets of monochromatic spectral images were reconstructed: 69keV level with 30% ASiR (group B1 ) and 52keV level with 50%ASiR (group B2 )...
May 1, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29706428/functional-ct-assessment-of-extravascular-contrast-distribution-volume-and-myocardial-perfusion-in-acute-myocardial-infarction
#20
Aaron So, Gerald Wisenberg, Patrick Teefy, Andrew Yadegari, Rodrigo Bagur, Jennifer Hadway, Laura Morrison, Anna MacDonald, Dave Gaskin, John Butler, Heather Biernaski, Stephanie Skanes, Stella DohYeoun Park, Ali Islam, Jiang Hsieh, Ting-Yim Lee
PURPOSE: In a pig model of acute myocardial infarction (AMI), we validated a functional computed tomography (CT) technique for concomitant assessment of myocardial edema and ischemia through extravscualar contrast distribution volume (ECDV) and myocardial perfusion (MP) measurements from a single dynamic imaging session using a single contrast bolus injection. METHODS: In seven pigs, balloon catheter was used to occlude the distal left anterior descending artery for one hour followed by reperfusion...
April 26, 2018: International Journal of Cardiology
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