Multidetector computed tomography venography: optimum dose of contrast material

2010 ◽  
Vol 28 (5) ◽  
pp. 335-339 ◽  
Author(s):  
Yoshiro Hori ◽  
Norihiko Yoshimura ◽  
Yosuke Horii ◽  
Toru Takano
Keyword(s):  
Computed Tomography ◽  
Multidetector Computed Tomography ◽  
Contrast Material ◽  
Optimum Dose ◽  
Computed Tomography Venography

Value of multidetector computed tomography in assessing blunt multitrauma patients

2005 ◽  
Vol 46 (2) ◽  
pp. 177-183 ◽  
Author(s):  
L. Ahvenjärvi ◽  
L. Mattila ◽  
R. Ojala ◽  
O. Tervonen
Keyword(s):  
Computed Tomography ◽  
Cervical Spine ◽  
Multidetector Computed Tomography ◽  
False Negative ◽  
Contrast Material ◽  
High Energy ◽  
Facial Bones ◽  
Imaging Protocol ◽  
Iodinated Contrast ◽  
Negative Findings

Purpose: To find out if multidetector computed tomography (MDCT), using a dedicated trauma protocol, provides sufficient diagnostic information of the injuries of blunt multitrauma patients to enable the planning of treatment for all body compartments. Material and Methods: One‐hundred‐and‐thirty‐three patients exposed to high‐energy trauma were referred and scanned with the standardized MDCT multitrauma protocol. The imaging protocol consisted of axial scanning of the head and helical scanning of the facial bones, cervical spine, thorax, abdomen, and pelvis. The scanning times were 12 s for the head, 19–21 s for the facial bones and cervical spine (1 mm collimation), and 32–50 s for the thorax, abdomen, and pelvis (2 mm collimation). One‐hundred‐and‐forty milliliters of non‐iodinated contrast material (300 mg I/ml) was administered intravenously at 3 ml/s. Results: Ninety‐nine of the patients (74%) had at least one finding consistent with trauma. The most frequent findings were in the thorax in 58 patients (44%). Nineteen false‐negative findings and two false‐positive findings were made. The overall sensitivity of MDCT was 94%, specificity 100%, and accuracy 97%. Conclusion: MDCT is accurate in the assessment of blunt multitrauma patients. The decision to treat the patient can be made on the basis of MDCT with a reasonable level of certainty.

scholarly journals Evaluation of Deep Vein Thrombosis With Reduced Radiation and Contrast Material Dose at Computed Tomography Venography

2012 ◽  
Vol 76 (11) ◽  
pp. 2614-2622 ◽  
Author(s):  
Seitaro Oda ◽  
Daisuke Utsunomiya ◽  
Yoshinori Funama ◽  
Toshiaki Shimonobo ◽  
Tomohiro Namimoto ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Deep Vein Thrombosis ◽  
Contrast Material ◽  
Vein Thrombosis ◽  
Deep Vein ◽  
Computed Tomography Venography

Effect of saline pushing after contrast material injection in abdominal multidetector computed tomography with the use of different iodine concentrations

2006 ◽  
Vol 47 (2) ◽  
pp. 192-197 ◽  
Author(s):  
F. Tatsugami ◽  
M. Matsuki ◽  
H. Kani ◽  
M. Tanikake ◽  
M. Miyao ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Portal Vein ◽  
Multidetector Computed Tomography ◽  
Saline Solution ◽  
Contrast Material ◽  
Arterial Phase ◽  
3D Ct ◽  
3D Ct Angiography ◽  
High Level ◽  
Parenchymal Enhancement

Purpose: To investigate whether saline pushing after contrast material improves hepatic vascular and parenchymal enhancement, and to determine whether this technique permits decreased contrast material concentration. Material and Methods: 120 patients who underwent hepatic multidetector computed tomography were divided randomly into four groups (Groups A–D): receiving 100 ml of contrast material (300 mgI/ml) only (A) or with 50 ml of saline solution (B); or 100 ml of contrast material (350 mgI/ml) only (C) or with 50 ml of saline solution (D). Computed tomography (CT) values of the aorta in the arterial phase, the portal vein in the portal venous inflow phase, and the liver in the hepatic phase were measured. Visualization of the hepatic artery and the portal vein by 3D CT angiography was evaluated as well. Results: Although the enhancement values of the aorta were not improved significantly with saline pushing, they continued at a high level to the latter slices with saline pushing. The enhancement value of the portal vein increased significantly and CT portography was improved with saline pushing. The enhancement value of the liver was not improved significantly using saline pushing. In a comparison between groups B and C, the enhancement values of the aorta and portal vein and the visualization of CT arteriography and portography were not statistically different. Conclusion: The saline pushing technique can contribute to a decrease in contrast material concentration for 3D CT arteriography and portography.

Analysis of Hepatic Capsular Enhancement Mimicking the Fitz-Hugh-Curtis Syndrome on a Multidetector Computed Tomography

2008 ◽  
Vol 58 (3) ◽  
pp. 277
Author(s):  
Ji Sang Park ◽  
Seong Jin Park ◽  
Hae Kyung Lee ◽  
Boem Ha Yi ◽  
Hyun Sook Hong ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Multidetector Computed Tomography ◽  
Fitz Hugh Curtis Syndrome

Noninvasive Evaluation of Coronary Artery Bypass Grafts with 16-Slice Multidetector Computed Tomography

2012 ◽  
Vol 15 (1) ◽  
pp. 12 ◽  
Author(s):  
Levent Sahiner ◽  
Ali Oto ◽  
Kudret Aytemir ◽  
Tuncay Hazirolan ◽  
Musturay Karcaaltincaba ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Coronary Artery ◽  
Diagnostic Accuracy ◽  
Multidetector Computed Tomography ◽  
Coronary Artery Bypass ◽  
Predictive Value ◽  
Artery Bypass ◽  
Time Interval ◽  
Mdct Angiography ◽  
Sensitivity Specificity

<p><b>Background:</b> The aim of this study was to investigate the diagnostic accuracy of 16-slice multislice, multidetector computed tomography (MDCT) angiography for the evaluation of grafts in patients with coronary artery bypass grafting (CABG).</p><p><b>Methods:</b> Fifty-eight consecutive patients with CABG who underwent both MDCT and conventional invasive coronary angiography were included. The median time interval between the 2 procedures was 10 days (range, 1-32 days). The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of MDCT for the detection of occluded grafts were calculated. The accuracy of MDCT angiography for detecting significant stenoses in patent grafts and the evaluability of proximal and distal anastomoses were also investigated.</p><p><b>Results:</b> Optimal diagnostic images could not be obtained for only 3 (2%) of 153 grafts. Evaluation of the remaining 150 grafts revealed values for sensitivity, specificity, PPV, NPV, and diagnostic accuracy of the MDCT angiography procedure for the diagnosis of occluded grafts of 87%, 97%, 94%, 93%, and 92%, respectively. All of the proximal anastomoses were optimally visualized. In 4 (8%) of 50 patent arterial grafts, however, the distal anastomotic region could not be evaluated because of motion and surgical-clip artifacts. The accuracy of MDCT angiography for the detection of significant stenotic lesions was relatively low (the sensitivity, specificity, PPV, and NPV were 67%, 98%, 50%, and 99%, respectively). The number of significant lesions was insufficient to reach a reliable conclusion, however.</p><p><b>Conclusion:</b> Our study showed that MDCT angiography with 16-slice systems has acceptable diagnostic performance for the evaluation of coronary artery bypass graft patency.</p>

Coronary Artery Fistula Detected by 64-Slice Multidetector Computed Tomography: Case Report

2010 ◽  
Vol 13 (3) ◽  
pp. E198-E199
Author(s):  
Yi-Chang Lin ◽  
Yi-Ting Tsai ◽  
Chih-Yuan Lin ◽  
Chung-Yi Lee ◽  
Gou-Jieng Hong ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Coronary Artery ◽  
Multidetector Computed Tomography ◽  
Coronary Artery Fistula

Nonionic Low-Osmolar Monomeric Iodinated Contrast Material: Some Aspects of use for Computed Tomography in Children

2017 ◽  
pp. 118-129
Author(s):  
I. A. Kondrashov ◽  
V. Mandal
Keyword(s):  
Computed Tomography ◽  
Contrast Agents ◽  
Adverse Reactions ◽  
Contrast Material ◽  
Iodine Content ◽  
Diagnostic Procedures ◽  
Diagnostic Efficacy ◽  
Minimum Risk ◽  
Electrical Neutrality ◽  
Iodinated Contrast

Iodine containing contrast media are used much frequently now-a-days for computed tomography examinations in children. The group of non-ionic monomers occupies a special place among modern contrast agents. Low osmolarity and viscosity, electrical neutrality and the highest iodine content of these contrast materials provide the best diagnostic efficacy with minimum risk of adverse reactions. However, characteristic anatomic and physiological aspects of a growing child’s body require additional attention and care during diagnostic procedures with use of such contrast agents. This article presents concise literature review of recent years highlighting practical aspects of nonionic lowosmolar iodinated contrast material use for computed tomography assisted diagnostic examinations in child population.

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