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iodin contrast

Song J Kim, Jonathan A Grossberg, Raul G Nogueira, Diogo C Haussen
An uncommon complication of iodinated contrast administration is the development of bilateral sialadenitis. We report a unique case of hyperacute unilateral parotiditis during diagnostic cerebral angiography of the external carotid artery, which mimicked possible iatrogenic vascular event associated with cerebral endovascular procedures. Discussion includes the differential diagnosis, diagnostic studies, and treatments for this unusual condition.
February 2018: Radiology Case Reports
Bradford Bennett, Drew Johnson, Andrew Panakos, Aleksandr Rozenberg
A 51-year-old woman with history of migraine headaches and intermittent nausea, vomiting, palpitations, and diaphoresis presented to the emergency department with hypertensive emergency 1 month after starting a beta blocker for migraine prophylaxis. Contrast-enhanced computed tomography of the chest incidentally revealed a large abdominal mass in the area of the left adrenal gland. Iodine-123 metaiodobenzylguanidine scan imaging showed localized uptake into the left adrenal gland. Along with imaging results, laboratory testing confirmed the diagnosis of pheochromocytoma...
February 2018: Radiology Case Reports
A M Villanueva Campos, G Tardáguila de la Fuente, E Utrera Pérez, C Jurado Basildo, D Mera Fernández, C Martínez Rodríguez
OBJECTIVE: To analyze whether there are significant differences in the objective quantitative parameters obtained in the postprocessing of dual-energy CT enterography studies between bowel segments with radiologic signs of Crohn's disease and radiologically normal segments. MATERIAL AND METHODS: This retrospective study analyzed 33 patients (16 men and 17 women; mean age 54 years) with known Crohn's disease who underwent CT enterography on a dual-energy scanner with oral sorbitol and intravenous contrast material in the portal phase...
March 14, 2018: Radiología
Sujith Chacko, George Joseph, Viji Thomson, Paul George, Oommen George, Debashish Danda
BACKGROUND: Use of iodinated contrast agents for angiography in patients with renal insufficiency risks further deterioration of renal function and its adverse sequelae. OBJECTIVE: To study the effectiveness and safety of carbon dioxide (CO2 ) angiography in guiding percutaneous renal-related interventions in patients with Takayasu arteritis and renal insufficiency. METHODS: Data on CO2 angiography-guided interventions were obtained from a 23-year database of 692 Takayasu arteritis patients who underwent percutaneous interventions and were analyzed retrospectively...
March 16, 2018: Cardiovascular and Interventional Radiology
Thomas Magee
OBJECTIVE: Post-operative shoulder patients are often difficult to image due to scar tissue, metallic artifact, and residual irregularity of anatomic structures. The purpose of this study was to assess MR versus MR arthrography versus CT arthrography in the post-operative shoulder. Also, we assessed whether injecting CT contrast in addition to MR contrast during arthrography improved patient care. METHODS AND MATERIALS: One hundred consecutive post-operative conventional shoulder MR and MR arthrography exams performed on the same patients were reviewed retrospectively by two musculoskeletal radiologists...
March 17, 2018: Skeletal Radiology
Bhavik N Patel, Alfredo Farjat, Christoph Schabel, Petar Duvnjak, Achille Mileto, Juan Carlos Ramirez-Giraldo, Daniele Marin
OBJECTIVE: The purpose of this study was to determine in vitro and in vivo the optimal threshold for renal lesion vascularity at low-energy (40-60 keV) virtual monoenergetic imaging. MATERIALS AND METHODS: A rod simulating unenhanced renal parenchymal attenuation (35 HU) was fitted with a syringe containing water. Three iodinated solutions (0.38, 0.57, and 0.76 mg I/mL) were inserted into another rod that simulated enhanced renal parenchyma (180 HU). Rods were inserted into cylindric phantoms of three different body sizes and scanned with single- and dual-energy MDCT...
March 16, 2018: AJR. American Journal of Roentgenology
Ingrid Boehm, Johannes T Heverhagen
Both iodinated contrast media and gadolinium-based contrast agents (GBCAs) can induce immediate hypersensitivity reactions. In addition, iodinated contrast media have been shown to be responsible for delayed or non-immediate reactions that occur 1 h up to several days following iodinated contrast medium-injection. Here we for the first time present a female patient who acquired a delayed reaction after the application of a gadolinium-based contrast agent.
March 11, 2018: Magnetic Resonance Imaging
Antonio Esposito, Anna Palmisano, Sofia Antunes, Caterina Colantoni, Paola Maria Vittoria Rancoita, Davide Vignale, Francesca Baratto, Paolo Della Bella, Alessandro Del Maschio, Francesco De Cobelli
PURPOSE: Diffuse remodeling of myocardial extra-cellular matrix is largely responsible for left ventricle (LV) dysfunction and arrhythmias. Our hypothesis is that the texture analysis of late iodine enhancement (LIE) cardiac computed tomography (cCT) images may improve characterization of the diffuse extra-cellular matrix changes. Our aim was to extract volumetric extracellular volume (ECV) and LIE texture features of non-scarred (remote) myocardium from cCT of patients with recurrent ventricular tachycardia (rVT), and to compare these radiomic features with LV-function, LV-remodeling, and underlying cardiac disease...
March 13, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
Xuemei Hu, Liya Ma, Jinhua Zhang, Zhen Li, Yaqi Shen, Daoyu Hu
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
March 12, 2018: Scientific Reports
Jeremy R Wortman, Jennifer W Uyeda, Urvi P Fulwadhva, Aaron D Sodickson
Computed tomography (CT) is key to the assessment of hemodynamically stable patients with blunt or penetrating trauma to the abdomen and pelvis. Dual-energy (DE) CT is a technology that allows acquisition of data at both high and low kilovolt peaks, allowing materials that have different x-ray absorption behaviors as a function of kilovolt peak (such as iodine) to be differentiated and quantified. DE CT has a variety of postprocessing applications that may be helpful in abdominal and pelvic trauma, including iodine-selective imaging, virtual monenergetic imaging, and virtual noncalcium imaging...
March 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Yeon Soo Kim, Young Hun Choi, Yeon Jin Cho, Seunghyun Lee, Soon Ho Yoon, Chang Min Park, Hye Ryun Kang
Objective: This study assessed the risk of acute allergic-like reactions (AARs) after extravascular administration of iodinated contrast media (ICM) in at-risk patients compared with that after intravascular ICM administration. Materials and Methods: From July 2012 to January 2016, 264 patients with a history of moderate or severe reactions to ICM, with re-exposure to ICM intravascularly or extravascularly were included. The incidence of recurrent AARs after ICM re-exposure were assessed according to the administration routes by reviewing electronic medical records and comparison between the two routes...
March 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
Richard W Harbron, Elizabeth A Ainsbury, Simon D Bouffler, Rick J Tanner, Mark S Pearce, Jonathan S Eakins
Studies suggest iodinated contrast media (ICM) may increase organ dose and blood cell DNA damage for a given X-ray exposure. The impact of ICM on dose/damage to extravascular cells and cancer risks is unclear. METHODS: We used Monte Carlo modelling to investigate the microscopic distribution of absorbed dose outside the lumen of arteries, capillaries and interstitial fluids containing blood and various concentrations of iodine. Models were irradiated with four X-ray spectra representing clinical procedures...
February 2018: Physica Medica: PM
Lukmanda Evan Lubis, Leonard Airell Craig, Hilde Bosmans, Djarwani Soeharso Soejoko
This study aimed to quantify the dose and quality of the preprogrammed imaging modes on two cardiac angiography devices (Philips Allura FD10 Clarity and Allura FD10) using a task-specific in-house phantom, and to discuss the appropriateness of the pre-programmed settings. A Figure of Merit (FOM), defined as the squared Signal Difference to Noise Ratio (SDNR) divided by Entrance Surface Air Kerma (ESAK), was calculated for phantom inserts with different sizes and concentrations of iodine, as well as tin foils...
February 2018: Physica Medica: PM
Robbert W van Hamersvelt, Nienke G Eijsvoogel, Casper Mihl, Pim A de Jong, Arnold M R Schilham, Nico Buls, Marco Das, Tim Leiner, Martin J Willemink
We investigated the feasibility and extent to which iodine concentration can be reduced in computed tomography angiography imaging of the aorta and coronary arteries using low tube voltage and virtual monochromatic imaging of 3 major dual-energy CT (DECT) vendors. A circulation phantom was imaged with dual source CT (DSCT), gemstone spectral imaging (GSI) and dual-layer spectral detector CT (SDCT). For each scanner, a reference scan was acquired at 120 kVp using routine iodine concentration (300 mg I/ml). Subsequently, scans were acquired at lowest possible tube potential (70, 80, 80 kVp, respectively), and DECT-mode (80/150Sn, 80/140 and 120 kVp, respectively) in arterial phase after administration of iodine (300, 240, 180, 120, 60, 30 mg I/ml)...
March 8, 2018: International Journal of Cardiovascular Imaging
Hua Su, Chen Ye, Qian Wen, Hong-Yan Zhu, Li-Xia Yi, Chun Zhang
BACKGROUND: It is well-recognized that injection of iodinated radiographic contrast media (CM) sometimes causes acute renal injury via multiple mechanisms, such as vasoconstriction, toxicity on glomerular endothelium and tubular epithelium and so forth. CASE PRESENTATION: A 51-year-old man developed acute renal injury with proteinuria after CM administration. To our surprise, in his renal biopsy sample the myelin figure like structure was observed in glomerular endothelium and mesangial cells by transmission electron microscopy...
March 6, 2018: BMC Nephrology
Takeshi Mizushima, Shunsuke Ohnishi, Yuichi Shimizu, Yutaka Hatanaka, Kanako C Hatanaka, Yugo Kuriki, Mako Kamiya, Akihiro Homma, Keiko Yamamoto, Shouko Ono, Yasuteru Urano, Naoya Sakamoto
BACKGROUND: A fluorescent probe glutamylprolyl hydroxymethyl rhodamine green (EP-HMRG), which becomes fluorescent after cleavage by dipeptidyl peptidase-IV (DPP-IV), has been reported to be useful for the detection of esophageal cancer. Thus, we investigated whether head and neck squamous cell carcinoma (HNSCC) can be detected by spraying EP-HMRG. METHODS: Fluorescence imaging of 17 cases of HNSCCs resected using endoscopic or surgical resection was performed ex vivo after spraying EP-HMRG, and then the fluorescence intensity of the tumors and normal mucosa were measured...
March 6, 2018: Head & Neck
Yu Liu, Yuanjun Wang, Weiqing Tang, Mengda Jiang, Kaicheng Li, Xiaofeng Tao
OBJECTIVE: To investigate the therapeutic efficacy of Iodine-125 (125 I) seeds brachytherapy to pancreatic ductal adenocarcinoma (PDAC) xenografts via multiparametric magnetic resonance imaging (MRI) analysis. MATERIALS AND METHODS: Twenty mice were implanted subcutaneously with SW-1990 PDAC xenografts. The tumor-bearing mice were randomly divided into125 I seeds group (n = 10) and blank control group (n = 10). Treatment response was monitored by diffusion-weighted magnetic resonance imaging (DW-MRI) and dynamic contrast-enhanced MRI (DCE-MRI) obtained 1 day before, 14 and 60 days after treatment...
March 5, 2018: La Radiologia Medica
Wui K Chong, Virginie Papadopoulou, Paul A Dayton
Microbubble ultrasound contrast agents (UCAs) were recently approved by the Food and Drug administration for non-cardiac imaging. The physical principles of UCAs, methods of administration, dosage, adverse effects, and imaging techniques both current and future are described. UCAs consist of microbubbles in suspension which strongly interact with the ultrasound beam and are readily detectable by ultrasound imaging systems. They are confined to the blood pool when administered intravenously, unlike iodinated and gadolinium contrast agents...
March 5, 2018: Abdominal Radiology
Mingquan Yan, Zhanghao Chen, Na Li, Yuxuan Zhou, Chenyang Zhang, Gregory Korshin
This study examined the electrochemical (EC) reduction of iodinated contrast media (ICM) exemplified by iopamidol and diatrizoate. The method of rotating ring-disc electrode (RRDE) was used to elucidate rates and mechanisms of the EC reactions of the selected ICMs. Experiments were carried at varying hydrodynamic conditions, concentrations of iopamidol, diatrizoate, natural organic matter (NOM) and model compounds (resorcinol, catechol, guaiacol) which were used to examine interactions between products of the EC reduction of ICMs and halogenation-active species...
February 21, 2018: Water Research
N D Thimmappa, J V Vasile, C Y Ahn, J L Levine, M R Prince
Autologous breast reconstruction using muscle-sparing free flaps are becoming increasingly popular, although microvascular free flap reconstruction has been utilised for autologous breast reconstructions for >20 years. This innovative microsurgical technique involves meticulous dissection of artery-vein bundle (perforators) responsible for perfusion of the subcutaneous fat and skin of the flap; however, due to unpredictable anatomical variations, preoperative imaging of the donor site to select appropriate perforators has become routine...
February 27, 2018: Clinical Radiology
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