Effect of different saline chaser volumes and flow rates on intravascular contrast enhancement in CT using a circulation phantom.
Eur J Radiol
; 73(3): 688-93, 2010 Mar.
Article
en En
| MEDLINE
| ID: mdl-19349133
ABSTRACT
PURPOSE:
To evaluate the influence of different saline chaser volumes and different saline chaser flow rates on the intravascular contrast enhancement in MDCT. MATERIALS ANDMETHODS:
In a physiological flow phantom contrast medium (120 ml, 300 mgI/ml, Ultravist 300) was administered at a flow rate of 6 ml/s followed by different saline chaser volumes (0, 30, 60 and 90 ml) at the same injection rate or followed by a 30-ml saline chaser at different injection rates (2, 4, 6 and 8 ml/s). Serial CT-scans at a level covering the pulmonary artery, the ascending and the descending aorta replica were obtained. Time-enhancement curves were computed and both pulmonary and aortic peak enhancement and peak time were determined.RESULTS:
Compared to contrast medium injection without a saline chaser the pushing with a saline chaser (30, 60, and 90 ml) resulted in a statistically significant increased pulmonary peak enhancement (all p=0.008) and prolonged peak time (p=0.032, p=0.024 and p=0.008, respectively). Highest aortic peak enhancement values were detected for a saline chaser volume of 30 ml. A saline chaser flow rate of 8 ml/s resulted in the highest pulmonary peak enhancement values compared to flow rates of 2, 4 and 6 ml/s (all p=0.008). Aortic peak enhancement showed the highest values for a flow rate of 6 ml/s.CONCLUSION:
A saline chaser volume of 30 ml and an injection rate of 6 ml/s are sufficient to best improve vascular contrast enhancement in the pulmonary artery and the aorta in MDCT.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aorta Torácica
/
Arteria Pulmonar
/
Yohexol
/
Cloruro de Sodio
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Tomografía Computarizada por Rayos X
/
Medios de Contraste
Límite:
Humans
Idioma:
En
Revista:
Eur J Radiol
Año:
2010
Tipo del documento:
Article
País de afiliación:
Alemania