IEC 62985:2019 applies to
– CT SCANNERS that are able to display and report CTDI VOL in accordance with IEC 60601 -2-44, and
– RADIATION dose index monitoring software (RDIMS) for the purpose of calculating, displaying and recording the SIZE SPECIFIC DOSE ESTIMATE ( SSDE ) and its associated components. Specifically, this document provides standardized methods and requirements
for calculating, displaying, or recording of SSDE , SSDE (z), WATER EQUIVALENT DIAMETER (D W ), and D W (z), where z represents a specific longitudinal position of the scanned object.
This document provides a method of determining a reference WATER EQUIVALENT DIAMETER , D W,REF (z), using CT scans of two cylindrical water PHANTOMS and one or more anthropomorphic PHANTOM ( S ), which conform to the specifications defined in this document. The method of calculating the WATER EQUIVALENT DIAMETER that is implemented by the MANUFACTURER , D W,IMP (z), is tested and validated against D W,REF (z) using the TEST OBJECTS and methods defined within this document. This document also describes the methods for calculating SSDE and D W, which represent the average values of SSDE (z) and D W (z) over the RECONSTRUCTION LENGTH .
NOTE This standardization is important to ensure that comparisons between reported SSDEs are valid.
