Triphasic Contrast Agent Injection in 64-MDCT Coronary Artery Angiography

Autor:	Shin H, Chun J, Shankar S, Young Hwan Kim, Missiroli C, Kandarpa K
Rok vydání:	2014
Předmět:	medicine.medical_specialty business.industry Coronary arteries medicine.anatomical_structure Great vessels Superior vena cava medicine.artery Right coronary artery Descending aorta Hounsfield scale Internal medicine Ascending aorta Pulmonary artery Cardiology Medicine business
Zdroj:	Nepalese Journal of Radiology. 4:12-22
ISSN:	2091-1378 2091-136X
DOI:	10.3126/njr.v4i1.11365
Popis:	Purpose: To evaluate image quality and cardiovascular enhancement after triphasic injection in 64-slice-CT coronary angiography (c-CTA). Methods: c-CTA of twenty-two asymptomatic patients following triphasic injection (65ml-contrast bolus + mixed 30ml-contrast and 20ml-saline bolus + 50ml-saline chaser) were retrospectively reviewed. Attenuation in the great vessels, cardiac chambers, and coronary arteries in 13 places were measured by region of interest. Also, differences in enhancement between the right coronary artery (RCA) and the right cardiac chambers (RCA versus right atrium or RA; RCA versus right ventricle or RV) were analyzed. Quality of images and contrast-related streak artifacts were subjectively assessed by 2 radiologists in consensus on a 4-point scale. Results: There was excellent enhancement in the coronary arteries (mean range 395.84-429.90 Hounsfield Units or HU), ascending aorta (mean 448.58 HU), descending aorta (mean 433.49 HU), and pulmonary artery (mean 385.45 HU). There was adequate difference in attenuation between RCA versus RA (mean range 126.12-148.43 HU) and RCA versus RV (mean range 50.34-72.66 HU). There was high and inhomogeneous attenuation in the superior vena cava (mean 509.23 HU). The quality of images was considered good (mean 1.6; 1 = excellent, 2 = good, 3 = moderate, 4 = low) and contrast-related streak artifacts were considered low (mean 2.9; 1 = severe, 2 = moderate, 3 = low, 4 = absent) by two radiologists. Conclusions: Our triphasic contrast injection provides excellent cardiovascular enhancement with minimal contrast-related streak artifacts, particularly in the right cardiac chambers while adequately differentiating the right coronary artery. DOI: http://dx.doi.org/10.3126/njr.v4i1.11365 Nepalese Journal of Radiology, Vol.4(1) 2014: 12-22
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0d54f5228ea7f45ec6b9477a49060e0b https://doi.org/10.3126/njr.v4i1.11365 Zobrazit plný text záznamu