Read by QxMD icon Read

radiographic media without iodine

Hao Sun, Xin-Yi Hou, Hua-Dan Xue, Xiao-Guang Li, Zheng-Yu Jin, Jia-Ming Qian, Jian-Chun Yu, Hua-Dong Zhu
OBJECTIVES: To evaluate the clinical feasibility of dual-source dual-energy CT angiography (DSDECTA) with virtual non-enhanced images and iodine map for active gastrointestinal bleeding (GIB). METHODS: From June 2010 to December 2012, 112 consecutive patients with clinical signs of active GIB underwent DSDECTA with true non-enhanced (TNE), arterial phase with single-source mode, and portal-venous phase with dual-energy mode (100 kVp/230 mAs and Sn 140 kVp/178 mAs)...
May 2015: European Journal of Radiology
Yoshifumi Noda, Masayuki Kanematsu, Satoshi Goshima, Hiroshi Kondo, Haruo Watanabe, Hiroshi Kawada, Nobuyuki Kawai, Yukichi Tanahashi, Toshiharu R T Miyoshi, Kyongtae T Bae
PURPOSE: To prospectively assess the effect of reduced iodine load to contrast enhancement, image quality, and detectability of hepatocellular carcinomas (HCCs) in hepatic CT with a combination of 80 kVp tube voltage setting and adaptive statistical iterative reconstruction (ASIR) technique in patients with chronic liver disease. MATERIALS AND METHODS: This HIPAA-compliant study was approved by our institutional review board and written informed consent was obtained in all patients...
January 2015: European Journal of Radiology
Kristina Bertl, Lena Hirtler, Toni Dobsak, Patrick Heimel, André Gahleitner, Christian Ulm, Hanns Plenk
OBJECTIVES: CT assessment of the entire course of the inferior alveolar artery (IAA) within the mandibular canal. METHODS: After contrast medium injection (180 or 400 mg/ml iodine concentration) into the external carotid arteries of 15 fresh human cadaver heads, the main IAA's position in the canal (cranial, buccal, lingual or caudal) was assessed in dental CT images of partially edentulous mandibles. RESULTS: The course of the main IAA could be followed at both iodine concentrations...
April 2015: European Radiology
Yongjie Wu, Minwen Zheng, Hongliang Zhao, Jian Li, Menggqi Wei, Ying Liu, Mingguo Shi, Yi Huan
OBJECTIVE: To assess the impact of low concentration contrast media on the degree of vascular enhancement, image quality and radiation dose in coronary CT angiography (cCTA) studies when using a combination of iterative reconstruction and low tube voltage. METHODS: 120 patients who underwent cCTA were randomly divided into two groups. The patients in group A received iopromide 370 were scanned using the conventional tube output, and images were reconstructed using filtered back projection (FBP)...
August 5, 2014: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Yingyu Dai, Liang Guo, Qichun Dai, Yonghao Liu, Xinxing Ma
OBJECTIVE: To evaluate the feasibility of low radiation exposure and low contrast medium volume for coronary CT angiography with High- pitch spiral acquisition mode of dual source CT. METHODS: 135 patients whose BMI <23 kg/m² and heart rates <65 bpm selected from 291 patients diagnosed of suspected CHD at our institution from September 2013 to February 2014 were randomly divided into 3 groups before CCTA, and there were 45 patients in each group. 80 kV , Iodixanol (320 mgI/ml) and sinogram affirmed iterative reconstruction (SAFIRE) were used in A group...
August 5, 2014: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Jorge M Fuentes-Orrego, Daniella Pinho, Naveen M Kulkarni, Mukta Agrawal, Brian B Ghoshhajra, Dushyant V Sahani
Computed tomographic (CT) angiography has become the standard of care, supplanting invasive angiography for comprehensive initial evaluation of acute and chronic conditions affecting the vascular system in the abdomen and elsewhere. Over the past decade, the capabilities of CT have improved substantially; simultaneously, the expectations of the referring physician and vascular surgeons have also evolved. Increasingly, CT angiography is used as an imaging biomarker for treatment selection and assessment of effectiveness...
September 2014: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Rekha Raju, Angus G Thompson, Kristy Lee, Bruce Precious, Tae-Hyun Yang, Adam Berger, Carolyn Taylor, Brett Heilbron, Giang Nguyen, James Earls, James Min, Patricia Carrascosa, Darra Murphy, Cameron Hague, Jonathon A Leipsic
BACKGROUND: There is concern regarding the administration of iodinated contrast to patients with impaired renal function because of the increased risk of contrast-induced nephropathy. OBJECTIVE: Evaluate image quality and feasibility of a protocol with a reduced volume of iodinated contrast and utilization of dual-energy coronary CT angiography (DECT) vs a standard iodinated contrast volume coronary CT angiography protocol (SCCTA). METHODS: A total of 102 consecutive patients were randomized to SCCTA (n = 53) or DECT with rapid kVp switching (n = 49)...
July 2014: Journal of Cardiovascular Computed Tomography
Diomidis Botsikas, Frederic Triponez, Sana Boudabbous, Catrina Hansen, Christoph D Becker, Xavier Montet
OBJECTIVE: To determine whether post-processing of the data from portal-phase enhanced dual-energy CT (DECT), with or without the addition of a late enhanced phase acquisition, may enable characterization of adrenal lesions without the need for acquisition of pre-contrast images. MATERIALS AND METHODS: Twenty-two patients with 24 adrenal lesions underwent unenhanced, venous and delayed phase DECT. Of these lesions, 20 were found to be adrenal adenomas, on the basis of histopathology, unenhanced attenuation values between 0 and -10 HU, or stability over at least 6 months...
October 2014: European Journal of Radiology
X-Z Lin, Z-Y Wu, W-X Li, J Zhang, X-Q Xu, K-M Chen, F-H Yan
AIM: To investigate the imaging characteristics of pancreatic serous oligocystic adenoma (SOA) and mucinous cystic neoplasms (MCNs) using spectral computed tomography (CT) and to evaluate whether quantitative information derived from spectral imaging can improve the differential diagnosis of these diseases. MATERIALS AND METHODS: From February 2010 to June 2013, 44 patients (24 SOAs and 20 MCNs) who underwent spectral CT imaging were included in the study. Conventional characteristics and quantitative parameters were compared between the two disease groups...
October 2014: Clinical Radiology
B Maurel, A Hertault, J Sobocinski, M Le Roux, T Martin Gonzalez, R Azzaoui, M Saeed Kilani, M Midulla, S Haulon
There is a large variability observed in the literature regarding radiation exposure and contrast volume injection during endovascular aortic repair (EVAR). Reducing both in order to decrease their respective toxicities must be a priority for the endovascular therapist. Radiation dose reduction requires a strict application of the "as low as reasonably achievable" principles. Firstly, all X-ray system settings should be defaulted to low dose, and fluoroscopic time reduced as much as possible. Digital subtraction angiography runs should be replaced by recorded fluoroscopy runs when possible...
April 2014: Journal of Cardiovascular Surgery
Sachiko Miura, Yoshiharu Ohno, Hiroshi Kimura, Kimihiko Kichikawa
BACKGROUND: Regional iodine distribution assessment on dual-energy computed tomography (DECT) has been suggested as useful for management of acute pulmonary thromboembolism (APTE) patients. However, no reported studies have made a direct comparison between quantitatively assessed DECT and right-to-left ventricular (RV/LV) ratio on CT for differentiation of right heart dysfunction (RHD) from non-right heart dysfunction (NRHD) in APTE patients. PURPOSE: To determine the capability of DECT for differentiation of RHD from NRHD in APTE patients...
March 2015: Acta Radiologica
Tobias Penzkofer, Karin Slebocki, Jochen Grommes, Philipp Bruners, Peter Isfort, Thomas Schmitz-Rode, Stephan Langer, Christiane K Kuhl, Andreas H Mahnken
PURPOSE: This study was designed to evaluate CO2 computed tomography angiography (CO2-CTA) of the iliac and lower limb arteries in patients with contraindications for iodinated contrast agent (ICA). METHODS: Five patients with contraindications for ICA were examined using CO2-fluoroscopic enhanced angiography (CO2-FLA) and CO2-CTA using a high-pitch examination protocol. Objective (vessel diameter) and subjective (visual score) image quality parameters were evaluated...
April 2014: Cardiovascular and Interventional Radiology
Hiroto Takahashi, Masahiro Okada, Tomoko Hyodo, Syojiro Hidaka, Yuki Kagawa, Mitsuru Matsuki, Masakatsu Tsurusaki, Takamichi Murakami
PURPOSE: To investigate whether low-dose dynamic CT of the liver with iterative reconstruction can reduce both the radiation dose and the amount of contrast medium. MATERIALS AND METHODS: This study was approved by our institutional review board. 113 patients were randomly assigned to one of two groups. Group A/group B (fifty-eight/fifty-five patients) underwent liver dynamic CT at 120/100 kV, with 0/40% adaptive statistical iterative reconstruction (ASIR), with a contrast dose of 600/480 mg I/kg, respectively...
April 2014: European Journal of Radiology
Minwen Zheng, Ying Liu, Mengqi Wei, Yongjie Wu, Hongliang Zhao, Jian Li
OBJECTIVES: To assess the impact of low-concentration contrast medium on vascular enhancement, image quality and radiation dose of coronary CT angiography (cCTA) by using a combination of iterative reconstruction (IR) and low-tube-voltage technique. MATERIALS AND METHODS: One hundred patients were prospectively randomized to two types of contrast medium and underwent prospective electrocardiogram-triggering cCTA (Definition Flash, Siemens Healthcare; collimation: 128 mm × 0...
February 2014: European Journal of Radiology
E W Goble, J A Abdulkarim
AIM: To evaluate whether a reduced volume of a higher-concentration iodinated contrast medium delivered with a multiphasic injection could be used in computed tomography pulmonary angiography (CTPA) to achieve a reduction in dose without adversely affecting image quality. MATERIALS AND METHODS: The CTPA images were retrospectively evaluated of 69 patients who received 100 ml of 300 mg iodine/ml ioversol, injected at constant rate of 5 ml/s and 70 patients who received 75 ml of 350 mg iodine/ml ioversol contrast medium delivered using a multiphasic injection protocol (starting at 5 ml/s and reducing exponentially)...
January 2014: Clinical Radiology
Edgar Bendik, Peter B Noël, Daniela Münzel, Alexander A Fingerle, Martin Henninger, Christian Markus, Alain Vlassenbroek, Ernst J Rummeny, Martin Dobritz
OBJECTIVE: To improve the detection of liver lesions in patients with hepatocellular carcinoma (HCC) via an iodine contrast enhancement tool. METHODS: Thirty-two patients with clinically proven HCCs underwent imaging with a three-phase protocol on a 256-slice MDCT. The contrast enhancement in the reconstructed slices was improved via a post-processing tool. Mean image noise was measured in four different regions: liver lesion, healthy liver, subcutaneous fat and bone...
January 2014: European Radiology
Joyce T Au, Gary Craig, Valerie Longo, Pat Zanzonico, Michael Mason, Yuman Fong, Peter J Allen
OBJECTIVE: Iodinated contrast agent for CT has a short half-life in the vasculature. As the field of interventional procedures expands, a more durable contrast agent would be highly useful. Our study investigated whether gold nanoparticles are feasible as a long-lasting vascular contrast agent for CT. MATERIALS AND METHODS: Gold nanoparticles were synthesized by a modified Turkevich method, coated with methoxy-polyethylene glycol-thiol chains, and compared with an iodine-based contrast agent used in mice...
June 2013: AJR. American Journal of Roentgenology
John Mongan, Samira Rathnayake, Yanjun Fu, Dong-Wei Gao, Benjamin M Yeh
PURPOSE: To compare the diagnostic performance of dual-energy (DE) computed tomography (CT) with two simultaneously administered contrast agents (hereafter, dual contrast) with that of conventional CT in the evaluation of the presence and source of extravasation in penetrating abdominopelvic trauma. MATERIALS AND METHODS: Institutional animal care and use committee approval was obtained, and the study was performed in accordance with National Institutes of Health guidelines for the care and use of laboratory animals...
September 2013: Radiology
Sevil Özkan, Aslıhan Semiz Oysu, Kadir Kayataş, Refik Demirtunç, Mehmet Eren, Hatice Uslu, Yüksel Altuntaş
OBJECTIVE: This study aims to investigate long-term effects of iodinated radiographic contrast media used for coronary angiography (CAG) on the thyroid function in euthyroid patients. METHODS: In a prospective observational cohort study, nonionic iodinated contrast material was electively used in 101 patients for coronary angiography. The patients were recruited without age restrictions and, at baseline, all had normal levels of free triiodothyronine (FT3), free thyroxine (FT4) and thyrotropin (TSH)...
June 2013: Anadolu Kardiyoloji Dergisi: AKD, the Anatolian Journal of Cardiology
T N Boellaard, O D F Henneman, G J Streekstra, H W Venema, C Y Nio, M C van Dorth-Rombouts, J Stoker
AIM: To assess the feasibility of colorectal cancer detection using dual-energy computed tomography with iodine mapping and without bowel preparation or bowel distension. MATERIALS AND METHODS: Consecutive patients scheduled for preoperative staging computed tomography (CT) because of diagnosed or high suspicion for colorectal cancer were prospectively included in the study. A single contrast-enhanced abdominal CT acquisition using dual-source mode (100 kV/140 kV) was performed without bowel preparation...
August 2013: Clinical Radiology
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"