Patient Dose in Breast Imaging: a retrospective analysis

Congress:

EuroSafe Imaging 2017

Poster Number:

ESI-0038

Type:

EuroSafe Imaging

Keywords:

Dosimetry, Mammography, Breast, Action 2 - Clinical diagnostic reference levels (DRLs), Action 3 - Optimisation, diagnostic reference levels, image quality, Quality assurance

Authors:

A. Morasca, W. Amadei, P. Belli, L. Indovina, D. Pasini, E. Chiarini, G. Migliaro, A. Piermattei, L. Bonomo

DOI:

10.1594/esi2017/ESI-0038

DOI-Link:

https://dx.doi.org/10.1594/esi2017/ESI-0038

Fig. 1: typical geometry for a tomosynthesis system

Fig. 2: tomosyntesis reconstruction system

Fig. 3: Mammomat Ispiration Siemens unit - Essential G.E. Unit

Table 1

Background/Introduction

Digital Breast Tomosynthesis (DBT) is a three-dimensional display technology for available for breast volumetric images from a finite number of two-dimensional projections at low dose, obtained at different angles relative to the X-ray tube (Fig.1.0): volumetric reconstruction could be useful to show lesions (masses, micro-calcifications, etc...) really invisible in the traditional 2D mammography (FFDM) (Fig.2.0). The aim of this work is to evaluate The Average Glandular Dose (AGD) either in DBT either in FFDM in clinical routine practice. AGD is estimated from technical parameters, which...

Description of activity and work performed

A retrospective clinical study was conducted on 90 women underwent either in FFDM either in BDT between September 2016 and December 2016 with two different Radiologic Unit (amorphous selenium digital detectors): Mammomat Ispiration Siemens and Essential G.E Healthcare (Fig.3.0): examination mode (FFDM, BDT), projection (CC, MLO), breast thickness under compression and AGD was collected. 30 patients underwent FFDM and DBT with Essential G.E Healthcare Unit. In FFDM the AGD average dose in Craniocaudal (CC) view is (1.4 mGy – 0.2 ds) and the AGD average...

Conclusion and Recommendations

The average ADG dose is substantially the same in FFDM using the Essential G.E Healthcare Unit or the Mammomat Ispiration Siemens Unit. The average ADG dose is little bit greater in BDT with the Mammomat Ispiration Siemens compared to the Essential G.E Healthcare Unit. In any case, the ADG values (either with the Mammomat Ispiration Siemens either with the Essential G.E Healthcare) confirm values available from literature and low dose for patients. (Tab. 1)

Personal/Organisational information

Dose-Optimization Strategies are organized in our hospital in staff between technicians, Medical Physicists and Radiologies according Euratom directives and Italian laws. Diagnostic Procedure are periodically revisited to improve dose and image quality optimization.

References

1- “Protocol for the Quality Control of the Physical and technical Aspects of Digital Breast Tomosinthesis Systems”,Draft Version 0.15,Gennaio 2014, EUREF. 2- Gisella Gennaro, “Tomosintesi: la nuova immagine mammografica”, 9° Congresso Internazionale AIFM 2016.