Simplified split-bolus intravenous contrast injection technique for pediatric abdominal CT

Area of Science:

• Radiology
• Medical Imaging
• Pediatric Imaging

Background:

• Computed tomography (CT) is crucial for diagnosing abdominal conditions in children.
• Contrast-enhanced CT requires careful optimization of radiation dose and image quality.
• Split-bolus contrast injection techniques have shown promise in optimizing CT protocols.

Purpose of the Study:

• To evaluate a simplified split-bolus contrast injection technique for pediatric abdominal CT.
• To compare radiation dose, image quality, and diagnostic accuracy against a standard single-bolus technique.

Main Methods:

• A prospective study comparing a simplified split-bolus group with a control single-bolus group.
• Assessment of effective radiation dose using dose-length product.
• Evaluation of image quality through noise level measurements in key abdominal vessels.
• Comparison of diagnostic accuracy for abdominal pathologies.

Main Results:

• The split-bolus group showed a statistically significant reduction in effective radiation dose (2.46 vs. 2.85 mSv, p=0.002).
• Lower noise levels were observed in the aorta, liver, and portal vein in the split-bolus group (p<0.001).
• One false-negative case of portal vein obliteration occurred in the split-bolus group, requiring careful interpretation.

Conclusions:

• A simplified split-bolus intravenous contrast injection technique is effective for pediatric abdominal CT.
• This method provides adequate and homogeneous enhancement while potentially lowering radiation exposure.
• Further evaluation is warranted to ensure comprehensive diagnostic accuracy for all pathologies.