Dose management system as a practical tool to establish local DRLs in digital mammography

Congress:

EuroSafe Imaging 2019

Poster Number:

ESI-0097

Type:

EuroSafe Imaging

Keywords:

Action 2 - Clinical diagnostic reference levels (DRLs), Action 4 - Dose management systems, Breast, Radioprotection / Radiation dose, Mammography, Dosimetry, Technology assessment, Dosimetric comparison

Authors:

A. Viñals Muñoz, R. Fayos-Sola Capilla, P. Garcia Castañon, I. GALÁN GONZALEZ, C. Idoate Ortueta, C. Ansón Marcos, D. Hernández González, M. L. España López

DOI:

10.26044/esi2019/ESI-0097

DOI-Link:

https://dx.doi.org/10.26044/esi2019/ESI-0097

Table 1: Median values and standard deviation of AGD and ESAK for CC view, both...

Table 2: Median values and standard deviation of AGD and ESAK for MLO view, both...

Table 3: Preliminary mammography DRLs established with Dose management programme, for CC...

Background/introduction

Mammography is the most effective technique for breast cancer detection, but entails by itself cancer induction risk; therefore, it is essential to optimize patient doses. European directive EURATOM 2013/59 (1) emphasizes the implementation and review of Diagnostic Reference Levels (DRLs) use as an optimization tool for diagnostic radiology procedures like mammography. According to International Commission of Radiation Protection (ICRP) recommendations, DRLs in a single facility (2) can be established by means of the median value of a distribution for the selected dosimetric quantity. The establishment...

Description of activity and work performed

Materials and Method: The study has been performed in a Siemens Inspiration unit installed at a University Hospital. Dose management online system connected to this modality is DoseWatch (General Electric Healthcare). 215 patients undergoing bilateral mammography with two projections: mediolateral oblique (MLO) view and craniocaudal (CC) view have been included. AGD and ESAK values are provided by the mammographic system for each image as dosimetric indices, and therefore extracted by the DMP. Prior to its use for dosimetric purposes, indices have to be validated by...

Conclusion and recommendations

Dose monitoring online systems constitute a useful tool for DRLs establishment, due to large samples of data which can be acquired. Validation of dosimetric indices has to be always performed by a medical physics expert prior to DRLs establishment based on these quantities. These results and preliminary presented DRLs shouldn’t be extrapolated to other mammographic systems, due to differences in dose calculation method among different units.

Personal/organisational information

Mr. Alberto Viñals Muñoz Degree in Physics Medical Physicist trainee, second year. Medical Physics and Radiation Protecition Department University Hospital la Princesa Madrid

References

European Council Directive 2013/59/Euratom on basic safety standards for protection against the dangers arising from exposure to ionizing radiation and repealing Directives 89/618/Euratom, 90/641/Euratom, 96/29/Euratom, 97/43/Euratom and 2003/122/Euratom. OJ of the EU. L13; 57:1-73 (2014) Vañó E, Miller DL, Martin CJ, Rehani MM, Kang K, Rosenstein M, etal. ICRP Publication 135: Diagnostic Reference Levels in Medical Imaging. Annals of the ICRP. 2017; 46(1):1-144. Dance DR. Monte-Carlo calculation of conversion factors for the estimation of mean glandular breast dose. Physics in Medicine and Biology. 1990; 35(9):1211-20....