Shaped-bolus protocol reduces contrast medium volume in abdominal CT while maintaining image quality

Area of Science:

• Radiology
• Medical Imaging
• Nephrology

Background:

• Contrast-enhanced computed tomography (CT) is crucial for abdominal imaging.
• Iodinated contrast media carry risks, including nephrotoxicity.
• Optimizing contrast delivery is essential for balancing diagnostic efficacy and patient safety.

Purpose of the Study:

• To evaluate the impact of contrast bolus shaping on image validity and renal function.
• To determine if reduced contrast volume with bolus shaping affects image quality.
• To assess the safety of a reduced contrast medium dose in abdominal CT.

Main Methods:

• Prospective study comparing 100 ml versus 75 ml contrast medium doses using bolus shaping.
• Objective image quality assessment via attenuation values (aorta, liver, spleen).
• Subjective image quality assessment (sharpness, noise, detectability, overall quality) and renal function (creatinine levels).

Main Results:

• No significant difference in renal function or objective image quality between the 75 ml and 100 ml groups.
• Significant improvement in image sharpness observed in the 100 ml contrast medium group.
• 190 abdominal CT studies were analyzed, with 98 receiving the 75 ml dose.

Conclusions:

• Bolus-shaping software enables maintaining objective image quality while reducing contrast medium load.
• Reduced contrast medium administration is feasible and safe in abdominal CT.
• This approach has significant implications for decreasing costs and risks associated with iodinated contrast media.