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

2020 ◽  
Author(s):  
Alistair Mackenzie ◽  
Riyad Khan ◽  
Kenneth C. Young
Keyword(s):  
Image Quality ◽  
Digital Mammography ◽  
Historical Trends ◽  
Mean Glandular Dose

scholarly journals Screen-film versus full-field digital mammography: Radiation dose and image quality in a large teaching hospital

2013 ◽  
Vol 28 (4) ◽  
pp. 398-405
Author(s):  
Tomislav Stantic ◽  
Olivera Ciraj-Bjelac ◽  
Sanja Stojanovic ◽  
Marijana Basta-Nikolic ◽  
Danijela Arandjic ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Digital Mammography ◽  
Quality Criteria ◽  
Patient Dose ◽  
Dose Assessment ◽  
Clinical Image ◽  
Full Field ◽  
Mean Glandular Dose ◽  
Full Field Digital Mammography

The objective of this paper is to measure the radiation dose and image quality in conventional screen-film mammography and full-field digital mammography in women referred to mammography examination. Participants underwent bilateral, two-view screen-film mammography or full-field digital mammography. The visibility of anatomical regions and overall clinical image quality was rated by experienced radiologists. Total of 387 women and 1548 mammograms were enrolled in the study. Image quality was assessed in terms of image quality score, whereas patient dose assessment was performed in terms of mean glandular dose. Average mean glandular dose for cranio-caudal projection was 1.5 mGy and 2.1 mGy in full-field digital mammography and screen-film mammography, respectively. For medio-lateral oblique projection, corresponding values were 2.3 and 2.1 mGy. Overall image quality criteria scoring was 0.82 and 0.99 for screen-film and digital systems, respectively. The scores were in the range from 0.11 to 1.0 for different anatomical structures. Overall, full-field digital mammography was superior both in terms of image quality and dose over the screen-film mammography. The results have indicated that phantom dose values can assist in setting the optimisation activities in mammography and for comparison between mammography units. To obtain accurate diagnostic information with an acceptable radiation dose to breast, it is necessary to periodically perform patient dose and image quality surveys in all mammography units.

scholarly journals Application of DQE for quantitative assessment of detectors to estimate AEC efficiency in digital mammography

2021 ◽  
Vol 27 (1) ◽  
pp. 51-56
Author(s):  
Ewa Fabiszewska ◽  
Anna Wysocka ◽  
Magdalena Dobrzyńska ◽  
Witold Skrzyński ◽  
Katarzyna Pasicz
Keyword(s):  
Image Quality ◽  
Digital Mammography ◽  
Quantitative Assessment ◽  
Control Mechanism ◽  
Detective Quantum Efficiency ◽  
Exposure Control ◽  
System Calibration ◽  
Mean Glandular Dose ◽  
Processing Procedure ◽  
Support Team

Abstract Optimisation of the detector’s exposure parameters settings for image quality and patient dose is an important task in digital mammography. Assessment of a digital detector’s performance can be done objectively and without operator bias by determining the Detective Quantum Efficiency (DQE). The authors of this article aim to prove that the performance of the AEC system can be objectively portrayed through DQE. The results were examined for influence of KAD changes on DQE values and to determine if it was possible to obtain similar DQE values for different exposures. While analysing the effect of the operation of the AEC system described with DQE, the doses received by women during mammography examinations were considered, as well. The AEC system’s exposure control mechanism cannot guarantee the same DQE value for different object thicknesses. When the object thickness increases, the AEC system should increase the KAD value to obtain the same DQE value. The result of increasing KAD would be the increase of mean glandular dose for some women. However, assuming that DQE is a good indicator of image quality, introducing the proposed changes to the AEC system’s operation would result in the same image quality for all breast thicknesses. This approach to DQE use for AEC system evaluation is independent of the image processing procedure and can be the basis for changes to system calibration done by the manufacturer’s technical support team.

Trade-off between breast mean glandular dose and image quality in digital and conventional mammogram systems: A multicenter study

2021 ◽  
Author(s):  
J. Rezapour ◽  
A. Mostear ◽  
A. Tarighatnia ◽  
F. Falahati ◽  
S.M. Hosseini ◽  
...  
Keyword(s):  
Image Quality ◽  
Digital Mammography ◽  
Statistical Tests ◽  
Wilcoxon Test ◽  
Breast Size ◽  
Trade Off ◽  
Full Field ◽  
Mean Glandular Dose ◽  
European Guidelines ◽  
Full Field Digital Mammography

Evaluating the patient dose or exposure parameters considering the image quality can improve the chances of accurate diagnosis and reduce the unnecessary exposures from medical devices such as mammography. This study aimed to evaluate digital and conventional mammography machines while considering the trade-off between image quality and mean glandular dose (MGD) using a phantom. In the present study, one full-field digital mammography (FFDM) and two film-screen mammography (FSM) machines were investigated. The MGD values and image quality were assessed using the American College of Radiology (ACR) phantom at various mAs and constant kVp values. The results were obtained and compared with European guidelines. Friedman and Wilcoxon statistical tests were used to show the comparison. The results from the quality control (QC) tests demonstrated that all machines are functioning well. The best image quality in the digital mammography machine was observed at the MGD of 1.8 mGy and 55 mAs. In addition, the two conventional machines had the best image quality regarding the imaging of the ACR phantom at 65 mAs with an MGD of 2.1 mGy. These values were considered as appropriate values for the studied mammography systems. Furthermore, the Friedman test demonstrated that there are significant differences between the measured image quality values obtained from the different machines (p < 0.05), however, according to the Wilcoxon test there were not any significant differences between the conventional machines at various mAs values. Owing to the results, for a medium breast size, the image quality will not be improved with increasing the exposure after a specified MGD corresponds to a certain mAs. It is notable that this value is smaller in digital mammography system at a reasonably low dose.

LATIN AMERICAN IMAGE QUALITY SURVEY IN DIGITAL MAMMOGRAPHY STUDIES

2016 ◽  
pp. ncw049
Author(s):  
Patricia Mora ◽  
Helen Khoury ◽  
Regina Bitelli ◽  
Ana Rosa Quintero ◽  
Fernando Garay ◽  
...  
Keyword(s):  
Image Quality ◽  
Latin American ◽  
Digital Mammography

scholarly journals Clinical study in phase- contrast mammography: image-quality analysis

2014 ◽  
Vol 372 (2010) ◽  
pp. 20130025 ◽  
Author(s):  
Renata Longo ◽  
Maura Tonutti ◽  
Luigi Rigon ◽  
Fulvia Arfelli ◽  
Diego Dreossi ◽  
...  
Keyword(s):  
Clinical Study ◽  
Synchrotron Radiation ◽  
Image Quality ◽  
Digital Mammography ◽  
Phase Contrast ◽  
Medical Physics ◽  
University Hospital ◽  
Quality Analysis ◽  
Radiology Department ◽  
Contrast Imaging

The first clinical study of phase-contrast mammography (PCM) with synchrotron radiation was carried out at the Synchrotron Radiation for Medical Physics beamline of the Elettra synchrotron radiation facility in Trieste (Italy) in 2006–2009. The study involved 71 patients with unresolved breast abnormalities after conventional digital mammography and ultrasonography exams carried out at the Radiology Department of Trieste University Hospital. These cases were referred for mammography at the synchrotron radiation facility, with images acquired using a propagation-based phase-contrast imaging technique. To investigate the contribution of phase-contrast effects to the image quality, two experienced radiologists specialized in mammography assessed the visibility of breast abnormalities and of breast glandular structures. The images acquired at the hospital and at the synchrotron radiation facility were compared and graded according to a relative seven-grade visual scoring system. The statistical analysis highlighted that PCM with synchrotron radiation depicts normal structures and abnormal findings with higher image quality with respect to conventional digital mammography.

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