Radiation dose differences between digital mammography and digital breast tomosynthesis are dependent on breast thickness

2016 ◽  
Author(s):  
Maram M. Alakhras ◽  
Claudia Mello-Thoms ◽  
Roger Bourne ◽  
Mary Rickard ◽  
Jennifer Diffey ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Digital Mammography ◽  
Digital Breast Tomosynthesis ◽  
Breast Tomosynthesis ◽  
Breast Thickness

Comparison of Microcalcifications Detection and Characterization in Digital Breast Tomosynthesis (DBT) With Synthesized 2D Mammography (SM) versus DBT with Full-Field Digital Mammography (FFDM)

2021 ◽  
Vol 104 (9) ◽  
pp. 1503-1510
Keyword(s):  
Radiation Dose ◽  
Sensitivity And Specificity ◽  
Digital Mammography ◽  
Digital Breast Tomosynthesis ◽  
Breast Tomosynthesis ◽  
Full Field ◽  
Full Field Digital Mammography

Background: Synthesized 2D mammography (SM) has been invented to help lower the radiation dose by circumventing the need for acquiring full-field digital mammography (FFDM) when digital breast tomosynthesis (DBT) is performed. Prior studies have compared microcalcifications detection and characterization in FFDM with SM or with DBT alone. Only few studies have compared DBT plus SM and DBT plus FFDM. Objective: To determine the performance of DBT with SM versus DBT with FFDM in detection and characterization of microcalcifications. Materials and Methods: Three hundred three paired examinations of 2D plus DBT images in the same session were performed. Fifty-five biopsyproven malignancy, 198 biopsy-proven benign microcalcifications, and 50 randomly selected negative screening studies were retrospectively reviewed by two radiologists. Comparison of sensitivity and specificity between the two modalities were performed. Results: From the 55 malignant microcalcifications, three cases were missed by DBT with FFDM but detected and correctly categorized as malignant by DBT with SM. Only one case of malignant microcalcifications was not detected by DBT with SM, and the present case was also miscategorized as benign by DBT with FFDM. There were no statistically significant differences in both detections (p=0.42), and characterization (p=0.65) of microcalcification between both modalities. In DBT with SM, the sensitivity was higher, and the specificity was lower for both detection and characterization of microcalcification when compared to DBT with FFDM. Conclusion: DBT in combination with SM is comparable to DBT in combination with FFDM for detection and characterization of microcalcifications. Keywords: Synthesized 2D mammography; Full-field digital mammography; Digital breast tomosynthesis; Microcalcifications detection and characterization

Breast compression parameters among women screened with standard digital mammography and digital breast tomosynthesis in a randomized controlled trial

2019 ◽  
Vol 61 (3) ◽  
pp. 321-330 ◽  
Author(s):  
Gunvor Gipling Waade ◽  
Åsne Holen ◽  
Sofie Sebuødegård ◽  
Hildegunn Aase ◽  
Kristin Pedersen ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Controlled Trial ◽  
Digital Breast Tomosynthesis ◽  
Compression Pressure ◽  
Breast Tomosynthesis ◽  
Breast Compression ◽  
Randomized Controlled ◽  
Mean Glandular Dose ◽  
Evidence Based Guidelines ◽  
Breast Thickness

Background No evidence-based guidelines regarding optimal breast compression in mammography exist, neither for standard digital mammography nor for digital breast tomosynthesis. Purpose To compare breast compression parameters and mean glandular dose in a randomized controlled trial with digital mammography versus digital breast tomosynthesis. Material and Methods We used information from 21,729 women aged 50–69 years, who participated in the To-Be trial, as part of BreastScreen Norway, 2016–2017. Information was obtained from the DICOM header and by assessing the images in an automated software for density estimation (VolparaDensity). Using linear regression, we investigated the effect of screening technique on breast compression parameters; compression force (N), compression pressure (kPa), and compressed breast thickness (mm), and mean glandular dose (mGy), by view (craniocaudal [CC] and mediolateral oblique [MLO]). We adjusted for age, breast volume and fibroglandular volume. Results A total of 11,056 (50.9%) women were screened with digital mammography and 10,673 (49.1%) with digital breast tomosynthesis. Adjusted regression analysis showed that women undergoing digital mammography received higher compression forces than women undergoing digital breast tomosynthesis (CC: –4.7 N; MLO: –1.1 N, P < 0.001 for both), higher compression pressure (CC: –1.0 k Pa; MLO: –0.1 kPa, P < 0.001 for both), and higher values of compressed breast thickness in the MLO view (–0.3 mm, P = 0.02). The women undergoing digital mammography received a lower mean glandular dose than women undergoing digital breast tomosynthesis ([+]0.06 mGy, P < 0.001). Conclusion Women undergoing digital breast tomosynthesis received lower compression force, compression pressure, and compressed breast thickness in MLO view, compared to women undergoing digital mammography. Further studies should investigate the impact of breast compression on image quality, screening outcome, and radiation dose for digital mammography and digital breast tomosynthesis in order to establish evidence-based guidelines for breast compression.

scholarly journals Assessment of Average Glandular Dose Received in Full-field Digital Mammography and Digital Breast Tomosynthesis

2020 ◽  
Author(s):  
Napat Ritlumlert ◽  
Sutthirak Tangruangkiat ◽  
Supannika Kawvised ◽  
Phornpailin Pairodsantikul ◽  
Phornpailin Pairodsantikul ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Standard Dose ◽  
Digital Breast Tomosynthesis ◽  
Reference Points ◽  
Tube Voltage ◽  
Breast Tomosynthesis ◽  
Full Field ◽  
The Third ◽  
Full Field Digital Mammography ◽  
Breast Thickness

Objective: To assess the average glandular doses (AGD) from full-field digital mammography (FFDM) and digital breast tomosynthesis (DBT). Material and Methods: Radiographic exposure parameters target/filter, tube voltage, and tube current were collected from 50 patients. Patient information including age, breast thickness, entrance surface air kerma (ESAK) and AGD from the monitor display were also recorded. The tube outputs (tube voltage and tube loadings) at the reference points in both FFDM and DBT modes were measured. The AGD was calculated from ESAK by using the correction factors following the Technical Report Series no. 457 protocol. For the DBT mode, the AGD was calculated and corrected for the X-ray gantry rotation following the Dance et al. method. Results: The radiation doses to breasts in terms of ESAK and AGD from FFDM were 4.97±2.29 and 1.36±0.48 milligray (mGy) respectively. The third quartiles were 6.5 mGy and 1.67 mGy, findings which were lower than the standard Dose Reference Levels reported by the International Atomic Energy Agency recommendation (AGD 3 mGy/view for standard breast thickness with grid). For the DBT mode, ESAK and AGD were 6.49±2.10 mGy and 1.63±0.51 mGy. The third quartiles were 7.68 mGy and 1.81 mGy which were more than the FFDM mode by 23.0% and 17.0%, respectively. Conclusion: This study found that the AGD received from the DBT mode was higher than from the FFDM mode. Patients who underwent combination modes of mammographic examination increasingly received AGD up to 1.74 mGy. However, the AGD in our institute was still lower than the standard AGD recommendations.

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