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KMID : 1149020190210010019
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Journal of Korean Society of Computed Tomographic Technology
2019 Volume.21 No. 1 p.19 ~ p.24
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Image Evaluation of CT Brain Angiography by Changes of Injection Rate of Saline
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Kang Jeon-Yeong
Kim Seong-Hwan
Kim Jeong-Dan
Lee In-Suk
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Abstract
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Purpose: In order to accurately diagnose CT Brain angiography, we want to find images that increase contrast only to the cerebral artery as much as possible by changing the injection speed of saline, which acts as a chaser after injecting the contrast agent, in order to reduce the venous phase.
Material and method: From March to June, 2018, 118 patients who underwent CT Brain angiography were divided into two groups, A and B, and the infusion flow rate of saline was changed to 5 ml / s and 2 ml / s. The angiogram is evaluated with the Hounsfield Unit (HU) measurement of the normal phase of the superior sagittal sinus.
Result: Group A(5 ml/s) averaged 139.9 HU, and group B(2 ml/s) was measured at an average of 114.8 HU, down 18% from group B compared to group A.
Conclusion: The reduction of saline infusion flow rate could reduce unnecessary venous phase in CT brain angiography. As a method for acquiring proper images, we need to think about the method of change of saline as well as the importance of the contrast agent that we generally think.
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KEYWORD
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CT Brain angiography, saline, HU
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