What is the ACR reference number for the CTDIvol for a pediatric abdomen?

The correct reference number for the volume computed tomography dose index (CTDIvol) for a pediatric abdomen is 20 mGy. This value is established by the American College of Radiology (ACR) as a guideline to optimize radiation dose while ensuring that diagnostic image quality is maintained.

The justification for this reference level lies in the sensitivity of pediatric patients to radiation exposure, as their developing tissues are more susceptible to the potential risks associated with ionizing radiation. Therefore, establishing a benchmark like the 20 mGy CTDIvol helps radiology departments standardize their protocols, ensuring that they stay within reasonable limits while providing effective imaging for pediatric cases.

The other values provided do not align with the ACR recommendations for pediatric abdomen CT scans, which serves to focus on minimizing radiation exposure. The reference values outside the correct choice, therefore, do not reflect the established safe practices for imaging children, highlighting the importance of adhering to the 20 mGy standard as a balance between safety and diagnostic efficacy.