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- Title
Study of Low kV, Low Contrast Agent Dosage, and Low Contrast Agent Flow Rate Scan in Computed Tomography Angiography of Children's Liver.
- Authors
Lan Wu; Shilong Tang; Wushuang Chen; Xin Chen; Li Zhang; Ling He
- Abstract
Background: During computed tomography (CT) examinations, the presence of radiation material undoubtedly has a certain impact on patients, particularly children, who are more susceptible to radiation. Consequently, finding ways to minimize radiation dosage and mitigate radiation-related risks while enhancing the quality and accuracy of CT scans has become a crucial concern for medical professionals in CT equipment manufacturing companies and radiology departments to contemplate. Objectives: This study aimed to explore the feasibility of low dose and low contrast medium combined with low flow rate scanning in CT angiography (CTA) of children's liver. Patients and Methods: A total of 59 children who visited our department for liver vascular CT scans between April 2021 and December 2022 were prospectively selected and randomly divided into 2 groups: the experimental group and the control group. The experimental group consisted of 28 children who received an injection of 80 kV, automatic tube current, low contrast dose (1.5 mL/kg), and low flow rate of 20 s. The control group included 31 children who were injected with 100 kV, automatic tube current, contrast agent dose (2 mL/kg), and flow rate of 16 s. The objective and subjective image quality, radiation dose, and iodine intake in the arterial, portal, and venous phases were compared between the 2 groups. Results: During the arterial, portal, and venous phases, the experimental group exhibited lower signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) compared to the control group (P < 0.05). However, there was no significant difference in subjective quality scores between the 2 groups (P> 0.05). The effective dose (ED), volume CT dose index (CTDIvol), and dose-length product (DLP) of the experimental group were lower than those of the control group (P< 0.05). Additionally, the iodine intake in the experimental group was lower than that in the control group (P < 0.05). Conclusion: In the examination of hepatic vascular CTA in children, the use of a 3-low scanning technique can effectively decrease radiation and contrast agents while ensuring sufficient image quality for accurate clinical diagnosis.
- Subjects
CHINA; LIVER radiography; IODINE radioisotopes; SEVOFLURANE; T-test (Statistics); BLOOD vessels; COMPUTED tomography; STATISTICAL sampling; CHLORAL; CHILDREN'S hospitals; RANDOMIZED controlled trials; DESCRIPTIVE statistics; CHI-squared test; LIVER diseases; STATISTICS; RADIATION doses; COMPARATIVE studies; DATA analysis software; LIVER; CONTRAST media; DRUG dosage; DRUG administration; CHILDREN
- Publication
Iranian Journal of Radiology, 2023, Vol 20, Issue 4, p1
- ISSN
1735-1065
- Publication type
Article
- DOI
10.5812/ijradiol-138586