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KMID : 1149020190210020085
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Journal of Korean Society of Computed Tomographic Technology
2019 Volume.21 No. 2 p.85 ~ p.92
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Study on the Correlation Between Cardiac Output and Contrast Enhancement (Aorta, Liver)
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Oh Seong-Min
Lee Seong-Ju
Kim Geon-Young
Jeong Sang-Heon
Lee Min-Su
Bang Yong-Sik
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Abstract
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PURPOSE: There are several factors for CT contrast enhancement. Currently, we are using weight-based contrast injection method. However, there are cases in which the vascular status of the patients is not appropriate for contrast injection. Therefore, this study investigates the relationship between the contrast enhancement factors and the cardiac output retrospectively to compose a variety of contrast injection methods.
MATERIAL AND METHODS: The 70 patients who underwent echocardiography, MRI cardiac examinations, and CT-angio were assigned to group 1 and their cardiac output is investigated. At the same time, the 29 patients who underwent the abdominal CT examination with body weight-based contrast injection assigned to Group 2. The measurement were obtained by HU values of arterial and venous aorta and liver. Statistical analysis was performed by using SPSS 25.
RESULT: The results showed that group 1 and 2 did not correlate with the arterial phase. The bolus tracking which considered the cardiac output and body weight to perform the contrast injection did not affect the arterial phase. There is negative correlation on venous phase, so the cardiac output correlated with contrast dilution. Overall, if the bolus tracking technique is used, the contrast enhanced arterial image would be suitable for diagnosis which is obtained regardless of the injection rate and volume. Correlation between cardiac output and dilution of contrast in the venous phase was confirmed.
CONCLUSIONS: Since this study is a retrospective study, there was many limitations in the method, but it is necessary to study not only cardiac output but also other factors. This study needs further test to conduct various method of injection of contrast and suitable images for diagnostic and to increase the patient satisfactory.
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KEYWORD
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contrast medium, contrast enhancement, contrast injection, cardiac output
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