keyword
MENU ▼
Read by QxMD icon Read
search

iodin contrast

keyword
https://www.readbyqxmd.com/read/28229910/optimized-energy-of-spectral-ct-for-infarct-imaging-experimental-validation-with-human-validation
#1
Veit Sandfort, Srikanth Palanisamy, Rolf Symons, Amir Pourmorteza, Mark A Ahlman, Kelly Rice, Tom Thomas, Cynthia Davies-Venn, Bernhard Krauss, Alan Kwan, Ankur Pandey, Stefan L Zimmerman, David A Bluemke
OBJECTIVES: Late contrast enhancement visualizes myocardial infarction, but the contrast to noise ratio (CNR) is low using conventional CT. The aim of this study was to determine if spectral CT can improve imaging of myocardial infarction. MATERIALS AND METHODS: A canine model of myocardial infarction was produced in 8 animals (90-min occlusion, reperfusion). Later, imaging was performed after contrast injection using CT at 90 kVp/150 kVpSn. The following reconstructions were evaluated: Single energy 90 kVp, mixed, iodine map, multiple monoenergetic conventional and monoenergetic noise optimized reconstructions...
February 11, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28228508/breast-milk-iodine-concentration-is-a-more-accurate-biomarker-of-iodine-status-than-urinary-iodine-concentration-in-exclusively-breastfeeding-women
#2
Susanne Dold, Michael B Zimmermann, Abdelmounaim Aboussad, Mohamed Cherkaoui, Qingzhen Jia, Tomislav Jukic, Zvonko Kusic, Antonio Quirino, Zhongna Sang, Teofilo Ol San Luis, Elena Vandea, Maria Andersson
Background: Iodine status in populations is usually assessed by the median urinary iodine concentration (UIC). However, iodine is also excreted in breast milk during lactation; thus, breast milk iodine concentration (BMIC) may be a promising biomarker of iodine nutrition in lactating women. Whether the mammary gland can vary fractional uptake of circulating iodine in response to changes in dietary intake is unclear.Objective: We evaluated UIC and BMIC as biomarkers for iodine status in lactating women with a wide range of iodine intakes...
February 22, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28227429/characterization-of-normal-and-scarred-myocardium-based-on-texture-analysis-of-cardiac-computed-tomography-images
#3
S Antunes, A Esposito, A Palmisanov, C Colantoni, F de Cobelli, A Del Maschio, S Antunes, A Esposito, A Palmisanov, C Colantoni, F de Cobelli, A Del Maschio, A Del Maschio, C Colantoni, F De Cobelli, A Esposito, S Antunes
An accurate detection of myocardial scar using Cardiac CT may have a strong clinical impact; however, the main drawback is the insufficient contrast to noise ratio of delayed iodine enhanced (DIE) CT images, which makes its accurate segmentation (manual as well as automatic) difficult. In this work, we investigate texture parameters applied on the different scans in order to obtain the scans and features that best differentiates normal from scarred myocardium. The experiments on 7 cases of myocarditis show the accuracy of the parameter energy in all scans, as well as the good performance of the angiographic scan (having higher spatial resolution) with different parameters for the segmentation propose...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226192/carbazole-linked-nir-aza-bodipy-dyes-as-triplet-sensitizers-and-photoacoustic-contrast-agents-for-deep-tissue-imaging
#4
Nagaiyan Sekar, Ramaiah D, Yogesh Gawale, Adarsh N, Joseph J, M Pramanik, S K Kalva
Four novel N-ethylcarbazole linked aza-BODIPY dyes (8a-b and 9a-b) were synthesized and characterized. The presence of N-ethylcarbazole moiety shifts their absorption and fluorescence spectra to the near-infrared region, ca. 650-730 nm, of electromagnetic spectra. These dyes possess strong molar absorptivity in the range of 3-4 x 104 M-1cm-1 with low fluorescence quantum yields. The triplet excited state as well as singlet oxygen generation of these dyes were enhanced upon iodination at the core position. The core iodinated dyes 9a-b showed excellent triplet quantum yield of ca...
February 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28225687/reducing-iodine-contrast-volume-in-ct-angiography-of-the-abdominal-aorta-using-integrated-tube-potential-selection-and-weight-based-method-without-compromising-image-quality
#5
Rogerio Vasconcelos, Terri J Vrtiska, Thomas A Foley, Thanila A Macedo, Juan C Montoya Cardona, Eric E Williamson, Cynthia H McCollough, Joel G Fletcher
OBJECTIVE: The purpose of this study is to determine whether image quality was maintained when a weight-based protocol incorporating tube potential selection was used to select lower iodine contrast volumes for aortic CT angiography (CTA). MATERIALS AND METHODS: Patients with potentially decreased renal function underwent CTA performed with the iodinated contrast volume determined using a table incorporating different tube potentials and patient weights. The image quality of CTA examinations performed with a reduced iodine volume (hereafter known as "low-iodine CTA examinations"), internal control CTA examinations (i...
March 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28224279/np-59-test-for-preoperative-localization-of-primary-hyperaldosteronism
#6
Marcello Di Martino, Iñigo García Sanz, Jose Luis Muñoz de Nova, Cristina Marín Campos, Miguel Martínez Martín, Luis Domínguez Gadea
PURPOSE: Adrenal venous sampling is generally considered the gold standard to identify unilateral hormone production in cases of primary hyperaldosteronism. The aim of this study is to evaluate whether the iodine-131-6-β-iodomethyl-19-norcholesterol (NP-59) test may represent an alternative in selected cases. METHODS: Patients submitted to laparoscopic adrenalectomy for suspected primary hyperaldosteronism (n = 27) were retrospectively reviewed. When nuclear medicine tests were preoperatively performed, their results were compared with the histopathologic findings and clinical improvement...
February 21, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28218614/first-i-in-vivo-i-magnetic-particle-imaging-of-lung-perfusion-in-rats
#7
Xinyi Yedda Zhou, Kenneth Jeffris, Elaine Yu, Bo Zheng, Patrick Goodwill, Payam Nahid, Steven Conolly
Pulmonary embolism (PE), along with the closely related condition of deep vein thrombosis, affect an estimated 600,000 patients in the US per year. Untreated, PE carries a mortality rate of 30%. Because many patients experience mild or non-specific symptoms, imaging studies are necessary for definitive diagnosis of PE. Iodinated CT pulmonary angiography (CTPA) is recommended for most patients, while nuclear medicine-based ventilation/perfusion (V/Q) scans are reserved for patients in whom the use of iodine is contraindicated...
February 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28213620/post-contrast-acute-kidney-injury-in-intensive-care-unit-patients-a-propensity-score-adjusted-study
#8
Jennifer S McDonald, Robert J McDonald, Eric E Williamson, David F Kallmes, Kianoush Kashani
PURPOSE: To examine the association of intravenous iodinated contrast material administration with the subsequent development of post-contrast AKI (PC-AKI), emergent dialysis, and short-term mortality using a propensity score-adjusted analysis of a cohort of intensive care unit (ICU) patients who underwent CT examination. METHODS: All ICU patients at our institution who received a contrast-enhanced (contrast group) or unenhanced (noncontrast group) CT scan from January 2006 to December 2014 were identified...
February 17, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28201864/recurrent-contrast-induced-encephalopathy-following-coronary-angiography
#9
Roberto Spina, Neil Simon, Romesh Markus, David W M Muller, Krishna Kathir
Contrast-induced encephalopathy (CIE) is an acute and reversible neurological disturbance associated with the intra-arterial administration of iodinated contrast medium during cardiac catheterisation. It may manifest with encephalopathy, motor and sensory disturbances; vision disturbances, including cortical blindness, ophthalmoplegia, aphasia; and seizures. Disruption of the blood-brain barrier and direct neuronal toxicity are believed to be implicated in the pathophysiology of the syndrome. Symptoms appear soon after contrast administration and resolve completely within 24-48 h...
February 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28199008/comparison-of-the-spread-of-two-different-volumes-of-contrast-medium-when-performing-ultrasound-guided-transversus-abdominis-plane-injection-in-dog-cadavers
#10
A Zoff, P Laborda-Vidal, J Mortier, M Amengual, E Rioja
OBJECTIVES: To compare, via CT imaging, the spread of different volumes of diluted iodinated contrast medium in the transversus abdominis muscle plane of dog cadavers. METHODS: Prospective, randomised study. An electro stimulation or a SonoTAP needle was inserted in plane with the ultrasound beam in the fascia between the internal oblique and transversus abdominis muscles. A test dose of 1 ml of diluted contrast (30 mg/mL iohexol) was injected to confirm positioning, followed by 0 · 5 mL/kg (n=14) or 1 mL/kg (n=12) and the distribution of the fluid compared...
February 15, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28198752/monoenergetic-dual-energy-computed-tomographic-imaging-cardiothoracic-applications
#11
Lukas Lenga, Moritz H Albrecht, Ahmed E Othman, Simon S Martin, Doris Leithner, Tommaso D'Angelo, Christophe Arendt, Jan-Erik Scholtz, Carlo N De Cecco, U Joseph Schoepf, Thomas J Vogl, Julian L Wichmann
Monoenergetic imaging is an increasingly used reconstruction technique in postprocessing of dual-energy computed tomography (DECT). The main advantage of this technique is the ability to substantially increase image contrast of structures with uptake of iodinated contrast material. Although monoenergetic imaging was mainly used in oncological DECT applications, recent research has further demonstrated its role in vascular imaging. Using this dedicated postprocessing algorithm, image contrast of vascular structures in the thorax can be increased, a drastic reduction of contrast material is feasible, and even beam-hardening artifacts can be reduced...
February 14, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28197679/contrast-associated-acute-kidney-injury-in-the-critically-ill-systematic-review-and-bayesian-meta-analysis
#12
Stephan Ehrmann, Andrew Quartin, Brian P Hobbs, Vincent Robert-Edan, Cynthia Cely, Cynthia Bell, Genevieve Lyons, Tai Pham, Roland Schein, Yimin Geng, Karim Lakhal, Chaan S Ng
PURPOSE: Critically ill patients, among whom acute kidney injury is common, are often considered particularly vulnerable to iodinated contrast medium nephrotoxicity. However, the attributable incidence remains uncertain given the paucity of observational studies including a control group. This study assessed acute kidney injury incidence attributable to iodinated contrast media in critically ill patients based on new data accounting for sample and effect size and including a control group...
February 14, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28196558/iodinated-contrast-encephalopathy
#13
Ke Chen, Sami Obaid, Laurent Guillon-Létourneau, Dang Khoa Nguyen
No abstract text is available yet for this article.
February 15, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28190602/prevention-of-acute-kidney-injury-in-intensive-care-units
#14
S Mas-Font, J Ros-Martinez, C Pérez-Calvo, P Villa-Díaz, S Aldunate-Calvo, E Moreno-Clari
Acute kidney injury (AKI) is a growing concern in Intensive Care Units. The advanced age of our patients, with the increase in associated morbidity and the complexity of the treatments provided favor the development of AKI. Since no effective treatment for AKI is available, all efforts are aimed at prevention and early detection of the disorder in order to establish secondary preventive measures to impede AKI progression. In critical patients, the most frequent causes are sepsis and situations that result in renal hypoperfusion; preventive measures are therefore directed at securing hydration and correct hemodynamics through fluid perfusion and the use of inotropic or vasoactive drugs, according to the underlying disease condition...
February 9, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28185349/indirect-computed-tomographic-lymphography-for-iliosacral-lymphatic-mapping-in-a-cohort-of-dogs-with-anal-sac-gland-adenocarcinoma-technique-description
#15
Stephanie A Majeski, Michele A Steffey, Mark Fuller, Geraldine B Hunt, Philipp D Mayhew, Rachel E Pollard
Sentinel lymph node mapping can help to direct surgical oncologic staging and metastatic disease detection in patients with complex lymphatic pathways. We hypothesized that indirect computed tomographic lymphography (ICTL) with a water-soluble iodinated contrast agent would successfully map lymphatic pathways of the iliosacral lymphatic center in dogs with anal sac gland carcinoma, providing a potential preoperative method for iliosacral sentinel lymph node identification in dogs. Thirteen adult dogs diagnosed with anal sac gland carcinoma were enrolled in this prospective, pilot study, and ICTL was performed via peritumoral contrast injection with serial caudal abdominal computed tomography scans for iliosacral sentinel lymph node identification...
February 9, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28181544/mono-energy-coronary-angiography-with-a-compact-synchrotron-source
#16
Elena Eggl, Korbinian Mechlem, Eva Braig, Stephanie Kulpe, Martin Dierolf, Benedikt Günther, Klaus Achterhold, Julia Herzen, Bernhard Gleich, Ernst Rummeny, Peter B Noёl, Franz Pfeiffer, Daniela Muenzel
X-ray coronary angiography is an invaluable tool for the diagnosis of coronary artery disease. However, the use of iodine-based contrast media can be contraindicated for patients who present with chronic renal insufficiency or with severe iodine allergy. These patients could benefit from a reduced contrast agent concentration, possibly achieved through application of a mono-energetic x-ray beam. While large-scale synchrotrons are impractical for daily clinical use, the technology of compact synchrotron sources strongly advanced during the last decade...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28174086/chitosan-coated-tungsten-trioxide-nanoparticles-as-a-contrast-agent-for-x-ray-computed-tomography
#17
Mehdi Firouzi, Reza Poursalehi, H Delavari, Fakhredin Saba, Mohammad A Oghabian
Recent advances have shown that inorganic nanoparticles (NPs) based on heavy elements are highly appropriate for X-ray computed tomography (CT). In this contribution, tungsten trioxide NPs are prepared by the electrical arc discharge (EAD) method in DI water. The effect of chitosan (CTS) and glutaraldehyde (GTA) as coating and cross-linking agent, respectively, on the hydrodynamic size and zeta potential of prepared tungsten trioxide NPs is investigated. It is found that zeta potential increases by increasing the amounts of CTS...
February 5, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28169369/fast-and-quantitative-t1%C3%AF-weighted-dynamic-glucose-enhanced-mri
#18
Patrick Schuenke, Daniel Paech, Christina Koehler, Johannes Windschuh, Peter Bachert, Mark E Ladd, Heinz-Peter Schlemmer, Alexander Radbruch, Moritz Zaiss
Common medical imaging techniques usually employ contrast agents that are chemically labeled, e.g. with radioisotopes in the case of PET, iodine in the case of CT or paramagnetic metals in the case of MRI to visualize the heterogeneity of the tumor microenvironment. Recently, it was shown that natural unlabeled D-glucose can be used as a nontoxic biodegradable contrast agent in Chemical Exchange sensitive Spin-Lock (CESL) magnetic resonance imaging (MRI) to detect the glucose uptake and potentially the metabolism of tumors...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28151965/prevention-of-contrast-induced-acute-kidney-injury-in-patients-undergoing-cardiovascular-procedures-a-systematic-review-and-network-meta-analysis
#19
Eliano P Navarese, Paul A Gurbel, Felicita Andreotti, Michalina Marta Kołodziejczak, Suetonia C Palmer, Sofia Dias, Antonino Buffon, Jacek Kubica, Mariusz Kowalewski, Tomasz Jadczyk, Michał Laskiewicz, Marek Jędrzejek, Maximillian Brockmeyer, Flavio Airoldi, Marinella Ruospo, Stefano De Servi, Wojciech Wojakowski, Christopher O' Connor, Giovanni F M Strippoli
BACKGROUND: Interventional diagnostic and therapeutic procedures requiring intravascular iodinated contrast steadily increase patient exposure to the risks of contrast-induced acute kidney injury (CIAKI), which is associated with death, nonfatal cardiovascular events, and prolonged hospitalization. The aim of this study was to investigate the efficacy of pharmacological and non-pharmacological treatments for CIAKI prevention in patients undergoing cardiovascular invasive procedures with iodinated contrast...
2017: PloS One
https://www.readbyqxmd.com/read/28149923/investigation-of-x-ray-spectra-for-iodinated-contrast-enhanced-dedicated-breast-ct
#20
Stephen J Glick, Andrey Makeev
Screening for breast cancer with mammography has been very successful, resulting in part to a reduction of breast cancer mortality by approximately 39% since 1990. However, mammography still has limitations in performance, especially for women with dense breast tissue. Iodinated contrast-enhanced, dedicated breast CT (BCT) has been proposed to improve lesion analysis and the accuracy of diagnostic workup for patients suspected of having breast cancer. A mathematical analysis to explore the use of various x-ray filters for iodinated contrast-enhanced BCT is presented...
January 2017: Journal of Medical Imaging
keyword
keyword
94182
1
2
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"