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https://www.readbyqxmd.com/read/27907049/dual-energy-ct-pulmonary-angiography-with-6g-iodine-a-propensity-score-matched-study
#1
Andreas Meier, Kai Higashigaito, Katharina Martini, Moritz Wurnig, Burkhardt Seifert, Dagmar Keller, Thomas Frauenfelder, Hatem Alkadhi
OBJECTIVE: To evaluate the performance of low contrast media (CM) dose dual-energy computed tomography pulmonary angiography (CTPA) with advanced monoenergetic reconstructions in patients with suspected pulmonary embolism (PE). MATERIALS AND METHODS: The study had institutional review board approval; all patients gave written informed consent. Forty-one patients (25 men, 16 women, mean age 62.9±14.7 years) undergoing low CM dose (15ml, 6g iodine) dual-energy CTPA with advanced monoenergetic reconstructions were matched via propensity-scoring based on logistic regression analysis with a comparison group of 41 patients (24 men, 17 women, mean age 62...
2016: PloS One
https://www.readbyqxmd.com/read/27899518/variable-mr-and-pathologic-patterns-of-hemorrhage-after-iodinated-contrast-infusion-in-mca-occlusion-reperfusion-model
#2
Humberto Morales, Aigang Lu, Yuko Kurosawa, Joseph F Clark, Thomas Tomsick
OBJECTIVE: To examine the hypothesis that IA reperfusion with iso-osmolar iodixanol, low-osmolar iopamidol, or saline causes different effects on MR signal changes and pathologic cut-brain section related to hemorrhagic transformation (HT) or iodinated radiographic contrast media (IRCM) deposition. METHODS: Infarct was induced in 30 rats by middle cerebral artery suture occlusion. Reperfusion was performed after 5 hours with iso-osmolar iodixanol (n=9), low-osmolar iopamidol (n=12) or saline (n=9)...
November 29, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27899435/imaging-oxygen-metabolism-with-hyperpolarized-magnetic-resonance-a-novel-approach-for-cardiac-and-renal-function%C3%A2-assessement
#3
Marie Schroeder, Christoffer Lausten
Every tissue in the body critically depends on meeting its energetic demands with sufficient oxygen supply. Oxygen supply/demand imbalances underlie the diseases that inflict the greatest socioeconomic burden globally. The purpose of this review is to examine how hyperpolarized contrast media, used in combination with MR data acquisition methods, may advance our ability to assess oxygen metabolism non-invasively and thus improve management of clinical disease. We first introduce the concept of hyperpolarization and how hyperpolarized contrast media have been practically implemented to achieve translational and clinical research...
November 29, 2016: Bioscience Reports
https://www.readbyqxmd.com/read/27889460/evaluation-of-time-lapse-for-establishing-distal-tubal-occlusion-diagnosis-during-hysterosalpingography-procedure-performed-by-using-water-soluble-contrast-media
#4
Serkan Kahyaoglu, Omer Hamid Yumusak, Inci Kahyaoglu, Gokce Naz Kucukbas, Alev Esercan, Yasemin Tasci
BACKGROUND: Hysterosalpingography (HSG) is the most frequently used diagnostic measure for simultaneously determining uterine abnormalities and tubal status among subfertile women. Despite several broader advantages such as availability and increased experience, the subjectivity involved during administration of the HSG procedure itself, and necessary imaging review, decreases the reliability and accuracy of HSG. In this study, we evaluated the time intervals between X-ray imaging during HSG procedure to establish the presence of distal tubal occlusion...
November 24, 2016: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/27888024/performance-of-photon-counting-breast-computed-tomography-digital-mammography-and-digital-breast-tomosynthesis-in-evaluating-breast-specimens
#5
Ann-Christin Rößler, Willi Kalender, Daniel Kolditz, Christian Steiding, Veikko Ruth, Caroline Preuss, Sandra Christina Peter, Barbara Brehm, Matthias Hammon, Rüdiger Schulz-Wendtland, Evelyn Wenkel
RATIONALE AND OBJECTIVES: This study compared a novel photon-counting breast computed tomography (pcBCT) system with digital mammography (DM) and digital breast tomosynthesis (DBT) systems. For this reason, surgical specimens were examined with all three techniques and rated by three observers. MATERIALS AND METHODS: A total of 30 surgical specimens were investigated with DM, DBT, and pcBCT; the associated images were shown to three experienced radiologists. Findings (22 microcalcifications and 23 mass lesions) were recorded and compared to the results of the pathological examination...
November 22, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27886757/different-sample-treatments-for-the-determination-of-icm-xr-in-fish-samples-followed-by-lc-hrms
#6
Mireia Núñez, Francesc Borrull, Núria Fontanals, Eva Pocurull
Iodinated X-ray contrast media (ICM-XR) are a group of pharmaceuticals widely used in medicine. Due to their low biodegradation rate, which makes their removal at wastewater treatment plants difficult, and the high doses at which they are administered, they have been detected in aquatic environments. In the present paper, a method for the quantitative determination of a group of ICM-XR in different fish species was developed and validated for the first time. Two extraction techniques were compared: pressurised liquid extraction (PLE) and QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe), with PLE being selected, followed by liquid chromatography-high resolution mass spectrometry...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27885402/-retention-of-contrast-media-in-the-history-of-radiology-sequelae%C3%A2-of%C3%A2-the-former-use-of-thorotrast-and-new-challenges
#7
G van Kaick, S Delorme
Detection of gadolinium deposits in patients who have repeatedly been administered intravenous gadolinium chelates have given rise to concern regarding the long-term safety of magnetic resonance imaging (MRI) contrast media. Nevertheless, negative long-term clinical effects have not yet been observed. In some publications parallels have been drawn to the sequelae of thorotrast that was formerly used for arterial angiography. In this article the history of thorotrast use is briefly described and in particular why, despite warnings, this substance was used frequently and worldwide...
November 24, 2016: Der Radiologe
https://www.readbyqxmd.com/read/27884388/shaped-bolus-protocol-reduces-contrast-medium-volume-in-abdominal-ct-while-maintaining-image-quality
#8
P Navin, A M Murray, K Nandikumar, R Waldron, B Tuohy, M Casey
AIM: To prospectively assess whether bolus shaping to exponentially decrease the contrast medium injection rate leads to alteration in image validity or renal function. MATERIALS AND METHODS: In this prospective study, patients alternatively received 100 ml contrast medium versus 75 ml via bolus shaping. Image quality was assessed via measurement of attenuation values in the aorta, liver, and spleen and also blinded subjective assessment of image sharpness, low contrast detectability, image noise, and overall quality...
November 21, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27878040/effect-of-contrast-media-on-urinary-cytopathology-specimens
#9
Sebastian Frees, Samir Bidnur, Michael Metcalfe, Peter Raven, Claudia Chavez-Munoz, Igor Moskalev, Ladan Fazli, Alan So
INTRODUCTION: Urological dogma dictates that washings collected from the urinary tract for cytological assessment must be performed without interference from contrast agents that may alter cellular integrity and diagnostic interpretation. In practice, the initial contrast used to outline the upper tracts is commonly discarded with subsequent saline washings sent for cytology. We hypothesize that contrast washings do not affect the morphology of urothelial carcinoma cells or the integrity of cytology interpretation...
August 2016: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/27867168/clinical-experience-of-dual-phase-cone-beam-computed-tomography-during-hepatic-arteriography-to-apply-3d-dsa
#10
Yoshinori Takao, Akihiko Kakimi, Yutaka Katayama, Shohei Sasaki, Toshiyo Norimasa, Shinichiro Izuta, Daisuke Himoto, Takao Ichida
We report on the methods and experiences of the dual-phase cone beam computed tomography during hepatic arteriography (CBCTHA) to apply the 3D-DSA. A total of 32 ml contrast medium (150 mgI/ml) was injected at the rate of 2.0 ml/s for 16 s. The early phase scan was initiated 10 s after the start of contrast media injection. The delayed phase scan was started 40 s after that (24 s after the end of CM injection). When using the dual phase CBCTHA, it was able to obtain the classical hepatocellular carcinoma (HCC) images same as computed tomography during hepatic arteriography (CTHA)...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/27863361/transradial-approach-for-coronary-angiography-and-intervention-in-the-elderly-a-meta-analysis-of-777-841-patients
#11
Sami M Alnasser, Akshay Bagai, Sanjit S Jolly, Warren J Cantor, Payam Dehghani, Sunil V Rao, Asim N Cheema
BACKGROUND: Studies showing an advantage of transradial approach (TR) for coronary angiography and intervention (PCI) compared to the transfemoral approach (TF) predominantly included a younger population. Therefore, we conducted a meta-analysis of published studies to determine the efficacy of TR in the elderly population. METHODS AND RESULTS: A comprehensive search identified 16 studies [3 randomized controlled studies, 13 observational] comprising 777,841 elderly patients undergoing PCI...
November 10, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27863354/contrast-media-use-in-patients-with-chronic-kidney-disease-undergoing-coronary-angiography-a-systematic-review-and-meta-analysis-of-randomized-trials
#12
Bhavi Pandya, Jean Chaloub, Valay Parikh, Sainath Gaddam, Jonathan Spagnola, Suzanne El-Sayegh, Marc Bogin, Ruben Kandov, James Lafferty, Sripal Bangalore
BACKGROUND: Patients with chronic kidney disease (CKD) undergoing coronary angiography (CA), adequate hydration and minimizing volume of contrast media (CM) are class 1b recommendations for preventing contrast induced nephropathy (CIN). Current data are insufficient to justify specific recommendations about isoosmolar vs. low-osmolar contrast media by the ACCF/AHA/SCAI guidelines. METHODS: Randomized trials comparing IOCM to LOCM in CKD stage 3 and above patients undergoing CA, and reporting incidence of CIN (defined by a rise in creatinine of 25% from baseline) were included in the analysis...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27855534/campania-preventability-assessment-committee-a-focus-on-the-preventability-of-the-contrast-media-adverse-drug-reactions
#13
Maurizio Sessa, Claudia Rossi, Concetta Rafaniello, Annamaria Mascolo, Daniela Cimmaruta, Cristina Scavone, Sonia Fiorentino, Enrico Grassi, Alfonso Reginelli, Antonio Rotondo, Liberata Sportiello
OBJECTIVE: The current study aims to assess the preventability of the contrast media adverse drug reactions reported through the Campania spontaneous reporting system, identifying the possible limitations emerged in this type of evaluation. METHOD: All the individual case safety reports validated by the Campania Pharmacovigilance Regional Centre from July 2012 to September 2015 were screened to select those that reported contrast media as suspected drug. Campania Preventability Assessment Committee, in collaboration with clinicians specialized in Radiology, assessed the preventability according to the P-Method, through a case-by-case approach...
November 18, 2016: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/27831955/ce-preventing-contrast-induced-acute-kidney-injury
#14
Yvonne Gallegos, Asma Ali Taha, Dana N Rutledge
: Diagnostic radiographic imaging scans using intravascular iodinated contrast media can lead to various complications. The most salient of these is contrast-induced acute kidney injury (CI-AKI) or contrast-induced nephropathy, a potentially costly and serious patient safety concern. Prevention strategies are the cornerstone of evidence-based clinical management for patients receiving contrast agents. These include preprocedure screening, stratification of patients based on risk factors, and protective interventions, the most important of which is hydration both before and after the radiographic imaging scan...
December 2016: American Journal of Nursing
https://www.readbyqxmd.com/read/27829600/two-cases-of-aortoenteric-fistula-with-gastrointestinal-bleeding
#15
Yuu Matsubara, Tomoyuki Ohta, Ryoji Tatsumi, Takuma Takasaka, Jun Sakamoto, Ryu Sato, Keisuke Kimura
Aortoenteric fistula (AEF) is a life-threatening condition that can present with gastrointestinal (GI) bleeding. AEFs have been classified into primary and secondary types. Primary AEF (PAEF) is a direct communication between the aorta and the GI tract. Secondary AEF (SAEF) is the result of a previous abdominal aortic aneurysm repair involving placement of a synthetic aortic graft. Diagnosis of AEF, especially PAEF, is difficult largely because AEF is so rarely encountered in practice. Computed tomography (CT) and endoscopic gastroduodenoscopy (EGD) are most frequently used to diagnose AEF, with abdominal contrast-enhanced CT being the preferred initial diagnostic test of choice...
2016: Nihon Shokakibyo Gakkai Zasshi, the Japanese Journal of Gastro-enterology
https://www.readbyqxmd.com/read/27828735/contrast-media-induced-renal-inflammation-is-mediated-through-hmgb1-and-its-receptors-in-human-tubular-cells
#16
Xiao-Feng Guan, Qing-Jie Chen, Xiao-Cong Zuo, Ren Guo, Xiang-Dong Peng, Jiang-Lin Wang, Wen-Jun Yin, Dai-Yang Li
With the rapid development of imaging diagnosis and interventional therapy, contrast media (CM) are widely used in clinics. However, contrast-induced nephropathy (CIN) is the third leading cause of hospital-acquired acute renal failure accounting for 10-12% of all causes of hospital-acquired renal failure. Recent study found that inflammation may participate in the pathogenesis of CIN, but the role of it remains unclear. HK-2 cells were treated with Iohexol, Urografin, and mannitol. Two types of CM increased the release of HMGB1 in cell supernatant accompanied by increased expression of TLR2 and CXCR4...
November 9, 2016: DNA and Cell Biology
https://www.readbyqxmd.com/read/27826994/diagnostic-efficacy-of-single-pass-abdominal-multidetector-row-ct-prospective-evaluation-of-a-low-dose-protocol
#17
Luigi Camera, Immacolata Liccardo, Federica Romano, Raffaele Liuzzi, Antonio Rispo, Massimo Imbriaco, Anna Testa, Gaetano Luglio, Simona De Fronzo, Fabiana Castiglione, Luigi Bucci, Arturo Brunetti
OBJECTIVES: To evaluate the diagnostic efficacy of single-pass contrast-enhanced multi-detector CT (CE-MDCT) performed with a low radiation-high contrast (LR-HC) dose protocol in selected patients with non traumatic acute bowel disease. METHODS: Sixty-five (32 M; 33 F; aged 20-67 years) consecutive patients with non traumatic acute bowel disease underwent single-pass CE-MDCT performed 70-100 sec after i.v. bolus injection of a non ionic iodinated contrast media (370 mgI/ml)...
November 9, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27825346/a-vessel-segmentation-method-for-multi-modality-angiographic-images-based-on-multi-scale-filtering-and-statistical-models
#18
Pei Lu, Jun Xia, Zhicheng Li, Jing Xiong, Jian Yang, Shoujun Zhou, Lei Wang, Mingyang Chen, Cheng Wang
BACKGROUND: Accurate segmentation of blood vessels plays an important role in the computer-aided diagnosis and interventional treatment of vascular diseases. The statistical method is an important component of effective vessel segmentation; however, several limitations discourage the segmentation effect, i.e., dependence of the image modality, uneven contrast media, bias field, and overlapping intensity distribution of the object and background. In addition, the mixture models of the statistical methods are constructed relaying on the characteristics of the image histograms...
November 8, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27821094/outcomes-risk-factors-and-health-burden-of-contrast-induced-acute-kidney-injury-an-observational-study-of-one-million-hospitalizations-with-image-guided-cardiovascular-procedures
#19
Pierre Aubry, Georges Brillet, Laura Catella, Aurélie Schmidt, Stève Bénard
BACKGROUND: Despite the use of low-osmolar contrast media that have significantly reduced the occurrence of severe adverse reactions, contrast-induced (CI) acute kidney injury (AKI) remains the third cause of AKI in hospitals. We sought to estimate the frequency of CI-AKI among hospitalized patients undergoing image-guided cardiovascular procedures, to quantify the effect of risk factors on the development of this complication and to assess relative organizational and economic burden in healthcare...
November 8, 2016: BMC Nephrology
https://www.readbyqxmd.com/read/27817053/magnetic-resonance-imaging-in-the-pre-operative-evaluation-of-obstructive-epiphora-true-fisp-and-vibe-vs-gadolinium
#20
Francesco Somma, Vincenzo d'Agostino, Fabio Tortora, Nicola Serra, Gerardo Sorrentino, Valeria Piscitelli, Andrea Somma, Mario Gamerra
PURPOSE: To assess unenhanced magnetic resonance imaging (MRI) in the preoperative evaluation of obstructive epiphora in patients undergoing dacryocystorhinostomy (DCR) and in particular, to evaluate the efficacy of this technique in the detection of the exact level of obstruction occurring in the naso-lachrymal duct (NLD). The correct identification and characterization of the NLD and its obstructions lead to a more effective surgery, preventing recurrent dacryocystitis after the surgical treatment...
November 5, 2016: La Radiologia Medica
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