Comparison of digital radiography's entrance surface doses computed from DICOM file or directly from TLDs / 中华放射医学与防护杂志

ABSTRACT

Objective To make comparison of consistency between the ESD's informationcalculated values and TLD readout values based on PHILIPS DigitalDiagnost so as to provide reference for realizing information management of medical exposure radiation dose during DR diagnosis and treatment.Methods TLDs were used to obtain the ESD values on chest,abdomen,vertebral body,pelvis and limbs.The exposure parameters were collected from the DICOM files,and the information value of ESD were calculated through the dose area product (DAP) method and the exposure parameter method.The consistency between information value and TLD readout value was compared by intraclass correlation coefficient and the Bland-Altman method.Results The ESD values obtained from DAP method,exposure parameter method and TLD method are,respectively,(0.730 ± 0.870) mGy,(0.720 ± 0.863) mGy and (0.770 ±0.948) mGy.ICC was 0.988 for ESDDAP-TLD and 0.982 for ESDParameters-TLD,respectively.The Bland-Altman map showed that the D-value of ESD obtained from DAP-TLD and Parameters-TLD beyond the 95％ consistency interval was 6.7％.Conclusions The PHILIPS DR daily diagnosis and treatment process is based on fixed-mode programmed diagnosis and treatment.Under the premise of qualified equipment quality control,the information calculated value based on DICOM files has a good consistency with TLD readout value.