Share Email Print
cover

Proceedings Paper

Historical trends in image quality and mean glandular dose in digital mammography
Author(s): Alistair Mackenzie; Riyad Khan; Kenneth C. Young
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper 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 (tT) 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 tT 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 tT (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, tT 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.

Paper Details

Date Published: 22 May 2020
PDF: 8 pages
Proc. SPIE 11513, 15th International Workshop on Breast Imaging (IWBI2020), 115131G (22 May 2020); doi: 10.1117/12.2550568
Show Author Affiliations
Alistair Mackenzie, The Royal Surrey County Hospital NHS Trust (United Kingdom)
Riyad Khan, The Royal Surrey County Hospital NHS Trust (United Kingdom)
The Univ. of Surrey (United Kingdom)
Kenneth C. Young, The Royal Surrey County Hospital NHS Trust (United Kingdom)
The Univ. of Surrey (United Kingdom)


Published in SPIE Proceedings Vol. 11513:
15th International Workshop on Breast Imaging (IWBI2020)
Hilde Bosmans; Nicholas Marshall; Chantal Van Ongeval, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray