Historical trends in image quality and mean glandular dose in digital mammography

Alistair Mackenzie; Riyad Khan; Kenneth C. Young

doi:10.1117/12.2550568

22 May 2020 Historical trends in image quality and mean glandular dose in digital mammography

Alistair Mackenzie, Riyad Khan, Kenneth C. Young

Author Affiliations +

Proceedings Volume 11513, 15th International Workshop on Breast Imaging (IWBI2020); 115131G (2020) https://doi.org/10.1117/12.2550568
Event: Fifteenth International Workshop on Breast Imaging, 2020, Leuven, Belgium

Abstract

Purpose: The methods used in the NHS Breast Screening Programme (NHSBSP) evaluation reports have been consistent over the last 15 years and so it is of value to examine the long term trends in image quality and radiation dose. Method: The mean glandular dose (MGD) measured using 45 mm thick polymethyl methacrylate and threshold gold thickness (t_T) measured using a CDMAM phantom were collated from 30 technical NHSBSP evaluations reports of digital radiography (DR) mammography systems and computed radiography (CR) detectors. Results: There was a wide range of MGD measured for the different systems, but on average there was no significant change in MGD over time for DR. The measured t_T for the 0.1 mm detail sizes significantly improved over time for DR. The MGD required for a system to reach the achievable level of t_T (MGDT) was calculated. This showed that modern DR systems required a lower MGDT. Theoretically all of the DR systems and one CR detector could have been set up to be at the achievable level or better. The MGD, t_T and MGDT results for CR detectors were on average worse than for DR. Conclusions: The quality of the DR systems has improved over time, it was also noted that the difference between the worst and the best system has been decreasing. It would appear that generally manufacturers have set up their systems to take advantage of the improved quality of their systems by improving the quality of the images rather than reducing MGD.

Citation Download Citation

Alistair Mackenzie, Riyad Khan, and Kenneth C. Young "Historical trends in image quality and mean glandular dose in digital mammography", Proc. SPIE 11513, 15th International Workshop on Breast Imaging (IWBI2020), 115131G (22 May 2020); https://doi.org/10.1117/12.2550568

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE