scholarly journals Survey of Mean Glandular Dose to Patients During Mammography Examinations: A Retrospective Study

2021 ◽  
pp. 243-248
Author(s):  
Edem Sosu ◽  
Mary Boadu ◽  
Albertina Oheneba Williams ◽  
Eric Otu Danquah ◽  
Annabel Ankrah ◽  
...  
Keyword(s):  
Quality Control ◽  
System Quality ◽  
Energy Agency ◽  
Full Field ◽  
Mean Glandular Dose ◽  
European Guidelines ◽  
Full Field Digital Mammography ◽  
Continuous Use ◽  
Risk Of Cancer ◽  
Quality Control Test

The radiation dose delivered to patients undergoing mammography examination is of utmost importance because of the risk of cancer induction due to the process. In this work, we analyze the dose to 109 patients (214 images) who underwent mammographic examinations with a full-field digital mammography (FFDM) system. Quality control assessment was first performed using the International Atomic Energy Agency (IAEA) Human Health Series 2 and 17 protocol and the European guidelines for quality assurance in breast cancer screening and diagnosis. The results from the quality control test performed indicates that the system is functioning well. The mean glandular dose of patients analyzed shows that 23 out of 109 patients received averaged doses higher than the acceptable level at the same equivalent breast thickness of a phantom. The mammography system at the department is recommended for continuous use for imaging and screening of patients.

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.

Image evaluation and breast density categories as a function of mammary positioning in full-field digital mammography

2019 ◽  
Vol 61 (7) ◽  
pp. 868-874
Author(s):  
Irene Tomoko Nakano ◽  
Gabriel Lucca de Oliveira Salvador ◽  
Hugo Reuters Schelin ◽  
Valeriy Denyak ◽  
Helen Jamil Khoury ◽  
...  
Keyword(s):  
Breast Density ◽  
Area Under The Curve ◽  
Quality Criteria ◽  
Roc Curves ◽  
Full Field ◽  
European Guidelines ◽  
Full Field Digital Mammography ◽  
Definition Of ◽  
The Individual ◽  
The Right

Background Appropriate mammary positioning is an important factor in optimizing image quality in mammography (MMG). Purpose To study the correlation of quality criteria and breast density classification proposed by the American College of Radiology (ACR) and European Guidelines and its influence to achieve a proper positioning, therefore an adequate MMG. Material and methods A total of 128 routine MMG examinations were reviewed for the definition of breast composition parenchyma and assessment of several quality criteria proposed by the ACR and European Guidelines to achieve an adequate MMG. Adequate MMG was defined as a difference between the posterior nipple line (PNL), difference of the mediolateral oblique (MLO) and craniocaudal (CC) incidences > 1 cm. The quality criteria were analyzed as a function of correlation coefficient in order to evaluate the individual impact of each factor and analysis of variance (ANOVA) for all criteria. Receiver operating characteristic (ROC) curves were plotted to evaluate the performance of the criteria on each type of parenchyma. Results Negative correlation of fatty breasts and visibility of the mammary angle, a greater number of skin folds and PNL > 1 cm (r < 0). Dense MMG presented less visibility of the lateral tissue compared with other categories. Area under the curve of ROC analysis revealed values of 53.1% and 54.7% for the right and left breasts, respectively. Conclusion Several factors influenced in the MMG process, but we find that breast parenchyma has a substantial role in affecting these criteria and therefore a correct position for diagnosis, which could compromise MMG diagnostic performance.

Effect of Compression Force and Target or Target/Filter Combination on Mean Glandular Dose for Japanese Women in Full-Field Digital Mammography System

2021 ◽  
Vol 11 (10) ◽  
pp. 2695-2700
Author(s):  
Mie Ishii ◽  
Mai Nakamura ◽  
Rie Ishii ◽  
Keiichi Shida ◽  
Toshikazu Hatada ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Japanese Women ◽  
Compression Pressure ◽  
Full Field ◽  
Breast Compression ◽  
Mean Glandular Dose ◽  
Full Field Digital Mammography ◽  
The Mean ◽  
The Difference ◽  
Breast Thickness

We constructed a mammography database of 807 Japanese women and 2,772 images obtained using five commercial full-field digital mammography (FFDM) devices at four different facilities. Five types of mammography devices fabricated by four manufacturers were used: one with a Mo target (AMULET F), one with Mo and Rh targets (Senographe DS), one with Mo and W targets (AMULET), and two with a W target (MAMMOMAT Fusion and Selenia Dimensions). The purpose of this study was to focus on the mean glandular dose (MGD) in the database and analyze the difference in the MGD of Japanese women radiographed by mammographic devices with different targets or target/filter combinations. Furthermore, we clarify the difference between the displayed and measured MGDs for the three types of mammography devices. The average compression pressure and compression breast thickness of the Japanese women in the mammography in this study were 90.9±21.7 N and 43.3±12.9 mm, respectively. The breast compression pressure slightly varied depending on the facility or FFDM device, while the compression breast thickness decreased with the increase in the compression pressure for all FFDM devices. Differences in breast compression thickness existed depending on the mammography devices. The MGDs of the two types of mammography devices using the W target were smallest (1.335±0.358, 1.218±0.464 mGy). The displayed and measured MGDs of the three types of FFDM devices had a good correlation. However, the difference between the displayed and measured MGDs of the two devices increased with the MGD.

scholarly journals Calibrated breast density methods for full field digital mammography: A system for serial quality control and inter-system generalization

2015 ◽  
Vol 42 (2) ◽  
pp. 623-636 ◽  
Author(s):  
B. Lu ◽  
A. M. Smallwood ◽  
T. A. Sellers ◽  
J. S. Drukteinis ◽  
J. J. Heine ◽  
...  
Keyword(s):  
Quality Control ◽  
Breast Density ◽  
Digital Mammography ◽  
Full Field ◽  
Full Field Digital Mammography ◽  
Density Methods

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.

A first experience of quality control in full field digital mammography

2003 ◽  
pp. 81-84
Author(s):  
G. Gennaro ◽  
P. Baldelli ◽  
C. di Maggio ◽  
A. Taibi ◽  
M. Gambaccini
Keyword(s):  
Quality Control ◽  
Digital Mammography ◽  
Full Field ◽  
Full Field Digital Mammography

scholarly journals Comparison of Mean Glandular Dose between Full-Field Digital Mammography and Digital Breast Tomosynthesis

Healthcare ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 1758
Author(s):  
Kar Choon Teoh ◽  
Hanani Abdul Manan ◽  
Norhashimah Mohd Norsuddin ◽  
Iqbal Hussain Rizuana
Keyword(s):  
Digital Mammography ◽  
Digital Breast Tomosynthesis ◽  
Breast Tomosynthesis ◽  
Full Field ◽  
Mean Glandular Dose ◽  
Full Field Digital Mammography ◽  
Dose Monitoring ◽  
Significant Difference ◽  
Radiation Induced ◽  
Breast Thickness

Early detection of breast cancer is diagnosed using mammography, the gold standard in breast screening. However, its increased use also provokes radiation-induced breast malignancy. Thus, monitoring and regulating the mean glandular dose (MGD) is essential. The purpose of this study was to determine MGD for full-field digital mammography (FFDM) and digital breast tomosynthesis (DBT) in the radiology department of a single centre. We also analysed the exposure factors as a function of breast thickness. A total of 436 patients underwent both FFDM and DBT. MGD was auto calculated by the mammographic machine for each projection. Patients’ data included compressed breast thickness (CBT), peak kilovoltage (kVp), milliampere-seconds (mAs) and MGD (mGy). Result analysis showed that there is a significant difference in MGD between the two systems, namely FFDM and DBT. However, the MGD values in our centre were comparable to other centres, as well as the European guideline (<2.5 mGy) for a standard breast. Although DBT improves the clinical outcome and quality of diagnosis, the risk of radiation-induced carcinogenesis should not be neglected. Regular quality control testing on mammography equipment must be performed for dose monitoring in women following a screening mammography in the future.

TOWARDS NATIONAL DIAGNOSTIC REFERENCE LEVELS FOR MAMMOGRAPHY IN SERBIA

2020 ◽  
Vol 191 (4) ◽  
pp. 477-486
Author(s):  
S Rafajlovic ◽  
O Ciraj-Bjelac ◽  
P Bozovic
Keyword(s):  
Computed Radiography ◽  
Screening Mammography ◽  
Diagnostic Reference Levels ◽  
Reference Levels ◽  
Full Field ◽  
X Ray ◽  
Mean Glandular Dose ◽  
Full Field Digital Mammography ◽  
Tube Output ◽  
Breast Thickness

Abstract The objective of this work is to investigate the possibility to set a national diagnostic reference levels (nDRLs) for diagnostic and screening mammography in Serbia based on local practice and available resources. This study included all types of mammography systems that are currently used in Serbia, namely screen-film mammography (SFM), computed radiography (CR) and full-field digital mammography (FFDM). The nDRLs are provided in terms of mean glandular dose (MGD) for different breast thicknesses simulated by polymethyl methacrylate (PMMA) phantom. For each breast thickness, MGD was calculated for the X-ray tube output, using clinically used exposure parameters. DRLs were chosen as the 75th percentile of MGD distribution for 20-, 40-, 45-, 60- and 70-mm phantom thicknesses. For SFM units proposed nDRL values are 0.7, 2.1, 2.7, 4.6 and 6.8 mGy; for CR units proposed nDRL values are 0.7, 1.8, 2.4, 4.5 and 5.6 mGy; and corresponding values for FFDM units are 0.8, 1.7, 2, 2. and 3.2 mGy for 20-, 40-, 45-, 60- and 70-mm PMMA thickness, respectively.

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