What is the acceptable range for SID indicator accuracy?

The acceptable range for the distance indicator accuracy in radiography is +/- 2%. This level of accuracy ensures that the source-to-image distance (SID) measurement is sufficiently precise to achieve optimal image quality and radiation dose management. The SID is critical in determining the radiographic technique required and significantly influences the exposure factors, such as the amount of radiation reaching the image receptor.

An indicator accuracy of +/- 2% allows for minor variations that can occur during the setup of radiographic equipment without compromising the overall quality of the radiographic process. Maintaining this level of precision is important for both safety and effectiveness in radiographic imaging practices. This standard is typically recommended by various radiographic and medical imaging organizations to ensure consistency and reliability in imaging procedures.