Head CT: Image quality improvement with ASIR-V using a reduced radiation dose protocol for children

Area of Science:

• Medical Imaging
• Radiology
• Image Reconstruction

Background:

• Pediatric head CT protocols often involve significant radiation exposure.
• Optimizing image quality while reducing radiation dose is crucial in pediatric imaging.

Purpose of the Study:

• To evaluate the image quality of pediatric head CT using Adaptive Statistical Iterative Reconstruction V (ASIR-V).
• To determine the potential for dose reduction with ASIR-V in pediatric head CT.

Main Methods:

• A phantom study was conducted with decreasing mA intervals and varying ASIR-V reconstruction levels.
• Pediatric head CT protocols were modified with reduced mA and implemented ASIR-V for different age groups (<3 and 3-15 years).

Main Results:

• ASIR-V reconstruction improved image quality by reducing noise and increasing contrast-to-noise ratio (CNR) in phantom studies.
• Reduced-dose protocols with ASIR-V achieved 12.8% to 34.0% dose reduction compared to conventional protocols.
• Qualitative analysis revealed enhanced gray-white matter differentiation, sharpness, and preserved diagnostic quality with ASIR-V.

Conclusions:

• ASIR-V enables significant radiation dose reduction in pediatric head CT while maintaining or improving image quality.
• The use of ASIR-V is a viable strategy for optimizing dose and image quality in pediatric CT imaging.