Read by QxMD icon Read

"contrast media"

Yu Zhang, Xiaoping Xiao, Ting Shu, Cai Jing, Xinlan Xiao, Yan-Shu Li, Zhongwei Zhang, Qun Tang
Manganese-based (chemically formulated of KMnF3) nanocrystal was evaluated as a liver-specific contrast agent for MR imaging, and also compare its imaging performance with those of two commercial hepatobiliary contrast media (Gd-EOB-DTPA and Mn-DPDP). KMnF3 nanocrystal was post-treated using plasma technique to cause severe defects, leading to appropriate water-dispersibility and high relaxivity. Severely defective KMnF3 nanocrystal (SD-KMnF3) is characteristic of high tolerance, as evidenced with cytotoxicity on macrophage cell, acute and subchronic toxicity on the healthy mouse...
March 12, 2018: Nanotechnology
C Mascoli, G L Faggioli, E Gallitto, V Vento, R Pini, A Vacirca, G Indelicato, M Gargiulo, A Stella
INTRODUCTION: Endovascular Aortic Repair (EVAR) is presently the preferred treatment for abdominal aortic aneurysm; however, it requires the injection of contrast medium, which can hamper the renal function. Other non-toxic agents, such as carbon dioxide (CO2 ) have been sporadically tested in this setting with uncertain results. Aim of the study is to investigate the efficacy of a new standardized CO2 injection method in standard EVAR procedures. METHODS: Between August and October 2016, 31 consecutive patients (median age 76...
March 6, 2018: Annals of Vascular Surgery
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
Junji Kamogawa, Osamu Kato, Tatsunori Morizane
PURPOSE: The aim of this study was to introduce a new method of producing three-dimensional (3D) images of vertebral venous plexuses (VVPs) by 3D-MRI with and without contrast media, to identify pathoanatomical features that might accelerate or modify spinal canal stenosis. METHODS: We used a 1.5-T MRI unit with two different 3D sequences with and without contrast media. Multi planar reconstruction (MPR) images of VVPs could be obtained by volume image subtraction methods with a workstation for dural sac from whole 3D volume MPR without contrast media, using images before and after gadoteridol injection...
March 7, 2018: Japanese Journal of Radiology
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
Rie Tanaka, Tohru Tani, Norihisa Nitta, Takahisa Tabata, Noritsugu Matsutani, Shintaro Muraoka, Tsutomu Yoneyama, Shigeru Sanada
OBJECTIVES: The aims of this study were to address the relationship between respiratory changes in image density of the lungs and tidal volume, to compare the changes between affected and unaffected lobes, and to apply this new technique to the diagnosis of atelectasis. MATERIALS AND METHODS: Our animal care committee approved this prospective animal study. Sequential chest radiographs of 4 pigs were obtained under respiratory control with a ventilator using a dynamic flat-panel detector system...
March 2, 2018: Investigative 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
Brandon Kovarovic, Henry H Woo, David Fiorella, Baruch B Lieber, Chander Sadasivan
Cerebral angiography involves the antegrade injection of contrast media through a catheter into the vasculature to visualize the region of interest under X-ray imaging. Depending on the injection and blood flow parameters, the bolus of contrast can propagate in the upstream direction and proximal to the catheter tip, at which point contrast is said to have refluxed. In this in vitro study, we investigate the relationship of fundamental hemodynamic variables to this phenomenon. Contrast injections were carried out under steady and pulsatile flow using various vessel diameters, catheter sizes, working fluid flow rates, and injection rates...
March 1, 2018: Cardiovascular Engineering and Technology
Andre Arantes Pereira Azevedo, Antonio Rahal, Priscila Mina Falsarella, Gustavo Caserta Lemos, Oliver Rojas Claros, Arie Carneiro, Marcos Roberto Gomes de Queiroz, Rodrigo Gobbo Garcia
OBJECTIVES: To describe the experience of our institution in image-guided renal nodules percutaneous cryoablation, evaluating demographic and technical aspects as well as efficacy, safety and follow up. MATERIALS AND METHODS: Retrospective study approved by our institutional review board. Seventy-one renal tumors evaluated in 60 patients treated with image guided percutaneous renal cryoablation from January 2009 to December 2015. No patient was excluded from study, even those who were lost on follow up...
March 2018: European Journal of Radiology
Yinsheng Li, John William Garrett, Ke Li, Yijing Wu, Kevin Johnson, Sebastian Schafer, Charles Strother, Guang-Hong Chen
Time-resolved C-arm cone-beam CT (CBCT) angiography (TR-CBCTA) images can be generated from a series of CBCT acquisitions that satisfy data sufficiency condition in analytical image reconstruction theory. In this work, a new technique was developed to generate TR-CBCTA images from a single short-scan CBCT data acquisition with contrast media injection. The reconstruction technique enabling this application is a previously developed image reconstruction technique, Synchronized Multi-Artifact Reduction with Tomographic Reconstruction (SMART-RECON)...
March 1, 2018: Physics in Medicine and Biology
Ashkan Heshmatzadeh Behzadi, Zerwa Farooq, Jeffery H Newhouse, Martin R Prince
BACKGROUND: This systematic review combines data from multiple papers on contrast media extravasation to identify factors contributing to increased extravasation risk. METHODS: Data were extracted from 17 papers reporting 2191 extravasations in 1,104,872 patients (0.2%) undergoing computed tomography (CT) or magnetic resonance imaging (MRI). RESULTS: Extravasation rates were 0.045% for gadolinium-based contrast agents (GBCA) and nearly 6-fold higher, 0...
March 2018: Medicine (Baltimore)
Domenico De Santis, Damiano Caruso, U Joseph Schoepf, Marwen Eid, Moritz H Albrecht, Taylor M Duguay, Akos Varga-Szemes, Andrea Laghi, Carlo N De Cecco
OBJECTIVES: To investigate the minimum iodine delivery rate (IDR) required to achieve diagnostic coronary attenuation (300 HU) with dual-energy coronary CTA. METHODS: Acquisitions were performed on a circulation phantom with a third- generation dual-source CT scanner. Contrast media was injected for a fixed time whilst IDRs varied from 1.0 to 0.3 gI/s in 0.1-gI/s intervals. Noise-optimized virtual monoenergetic imaging (VMI+) reconstructions from 40 to 90 keV in 5 keV increments were generated...
February 27, 2018: European Radiology
Taku Yasumoto, Kenji Uemoto, Koichi Yamada, Hakketsu Koh, Masaru Yamazaki, Norihisa Masai, Daisaku Tatsumi, RyoongJin Oh
A 70's man had been treated with gemcitabine(GEM)and nab-paclitaxel(nabPTX)combination for advanced pancreatic tail cancer with splenic invasion and liver metastases. However, the primary lesion was not controlled, then intensity-modulat- ed radiation therapy(76.5 Gy/17 Fr)was performed for primary lesion. Three grown hypovascular liver metastases were detected by follow-up EOB-MRI and PET-computed tomography(CT)imaging with 18F-FDG. Unfortunately, these lesions were not detected by intravenous injection of contrast media with CT nor ultrasonography...
February 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
Yasunori Iida, Akihiro Yoshitake, Hideyuki Shimizu
We report a case of successful thoracic endovascular aortic repair using a three-dimensional computed tomography (3D CT) roadmap for a patient with severe contrast media allergy. As 3D CT image data were previously obtained, we integrated the data with the fluoroscopic image three-dimensionally and constructed a 3D CT roadmap. This method is anticipated to be effective in patients who require less contrast enhancement or radiological dose by examining the appropriate imaging protocol for the kinds, shapes, and positions of the benchmarks for fusion...
February 23, 2018: Annals of Vascular Surgery
Jai-Sing Yang, Yan-Ru Peng, Shih-Chang Tsai, Yeu-Sheng Tyan, Chi-Cheng Lu, Hong-Yi Chiu, Yu-Jen Chiu, Sheng-Chu Kuo, Yuh-Feng Tsai, Ping-Chin Lin, Fuu-Jen Tsai
Iodinated contrast media (iodinated CM) have increased ability to absorb x-rays and to visualize structures that normally are impossible to observe in a radiological examination. The use of iodinated CM may destory renal function, commonly known as contrast-induced nephropathy (CIN), which can result in acute renal failure (ARF). This review article mainly focuses on the following areas: (1) classifications of iodinated CM: ionic or non-ionic, high-osmolarity contrast media (HOCM), low-osmolarity contrast media (LOCM) and iso-osmolarity contrast media (IOCM); (2) an introduction to the physical and chemical properties of the non-ionic iodinated CM; (3) the management of anaphylactic reaction by iodinated CM; (4) a suggested single injection of adult doses and maximum dose for non-ionic iodinated CM; (5) the molecular mechanism of contrast-induced nephropathy (CIN); (6) In vitro studies on iodinated CM...
March 2018: BioMedicine
Piotr Kübler, Wojciech Zimoch, Michał Kosowski, Brunon Tomasiewicz, Artur Telichowski, Krzysztof Reczuch
INTRODUCTION: Transfemoral approach (TFA) may be preferred access site in order to facilitate complex percutaneous procedures such as rotational atherectomy (RA). Notwithstanding, there is a growing evidence that transradial approach (TRA) is associated with lower access site complication rates and even lower mortality. The aim was to assess in-hospital and 1-year outcomes in patients undergoing RA using TRA, in comparison to TFA. METHODS: A single center observational study included all consecutive patients, who underwent RA from 2010 to 2015...
February 21, 2018: Journal of Interventional Cardiology
Marie Marty, Delphine Gaye, Paul Perez, Claire Auder, Marie-Laure Nunes, Amandine Ferriere, Magalie Haissaguerre, Antoine Tabarin
CONTEXT: the recent recommendations of the European endocrine society states that the performance of computed tomography (CT) to characterize true adrenal incidentalomas (AIs) remains debatable. OBJECTIVE: to determine relevant thresholds for usual CT parameters for the diagnosis of benign tumors using robust reference standard amongst a large series of "true" AIs recruited in an endocrinological setting. DESIGN: retrospective study of 253 AIs in 233 consecutive patients explored in a single university hospital: 183 adenomas, 33 pheochromocytomas, 23 adrenocortical carcinomas, 5 other malignant tumors and 9 other benign tumors...
February 21, 2018: European Journal of Endocrinology
M C Moreno Escobosa, S Cruz Granados
No abstract text is available yet for this article.
2018: Journal of Investigational Allergology & Clinical Immunology
Masaya Iwamuro, Shiho Takashima, Toshihiro Inokuchi, Masahiro Takahara, Seiji Kawano, Sakiko Hiraoka, Yoshitaka Kondo, Takehiro Tanaka, Hiroyuki Okada
A 40-year-old Japanese man with abdominal pain was referred to our hospital. The patient had been diagnosed with Crohn's disease at the age of 21 years and had since then received treatment with mesalazine and had been advocated an elemental diet. About 30 months before his visit to the hospital, he had swallowed a patency capsule, the retention of which in the ileum was subsequently detected on abdominal ultrasonography. The patient was advised to undergo the evaluation of stenosis, but he refused further investigation at that time...
2018: Nihon Shokakibyo Gakkai Zasshi, the Japanese Journal of Gastro-enterology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"