Evaluation of effective detective quantum efficiency considering breast thickness and glandularity in prototype digital breast tomosynthesis system

2017 ◽  
Author(s):  
Seungyeon Choi ◽  
Ye-seul Kim ◽  
Sunghoon Choi ◽  
Haenghwa Lee ◽  
Donghoon Lee ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Digital Breast Tomosynthesis ◽  
Detective Quantum Efficiency ◽  
Breast Tomosynthesis ◽  
Breast Thickness

Effective detective quantum efficiency of two detectors in a prototype digital breast tomosynthesis

Optik ◽  
2019 ◽  
Vol 178 ◽  
pp. 1137-1144
Author(s):  
Seungyeon Choi ◽  
Sunghoon Choi ◽  
Donghoon Lee ◽  
Ye-seul Kim ◽  
Young-Wook Choi ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Digital Breast Tomosynthesis ◽  
Detective Quantum Efficiency ◽  
Breast Tomosynthesis

scholarly journals Self-reported Pain Associated With Screening With Digital Breast Tomosynthesis

2020 ◽  
Author(s):  
Nataliia Moshina ◽  
Anders Skyrud Danielsen ◽  
Åsne Sørlien Hølen ◽  
Berit Hanestad ◽  
Elisabeth Stephansen ◽  
...  
Keyword(s):  
Pain Score ◽  
Rating Scale ◽  
Digital Breast Tomosynthesis ◽  
Ordinary Least Squares ◽  
Least Squares Regression ◽  
Compression Force ◽  
Compression Pressure ◽  
Breast Tomosynthesis ◽  
The Mean ◽  
Breast Thickness

Abstract Objective We aimed to investigate self-reported pain during screening with digital breast tomosynthesis (DBT). Methods The study was approved by the Regional Committee for Medical and Health Research Ethics in the South East of Norway (2015/424). Women completed a questionnaire about experienced pain directly after the examination, August–November 2019. A numeric rating scale (NRS, 0–10) was used. Data on compression force (N), pressure (kPa), and compressed breast thickness (mm) were obtained from the Digital Imaging and Communication in Medicine header and density assessment software. Stepwise ordinary least-squares regression was used to estimate mean self-reported pain score with 95% confidence interval (CI) for values of compression force, pressure, and compressed breast thickness. Results The mean pain score was 1.9, whereof 19.3% (822/4266) of the women reported moderate or severe pain. The mean pain score of 2.6 (95% CI: 2.4–2.7) was observed at a compression force of 60 N, decreasing to 1.3 (95% CI: 1.2–1.4) at 130 N. The mean pain score of 1.3 (95% CI: 1.1–1.4) was at a compression pressure of 6 kPa, increasing to 2.9 (95% CI: 2.7–3.1) at 16 kPa. The mean pain score was 0.6 (95% CI: 0.4–0.6) at a compressed breast thickness of 20 mm, increasing to 2.9 (95% CI: 2.7–3.1) at 90 mm. Conclusion The mean pain score was low, 1.9 on NRS, for women screened with DBT. A compression force of 60–130 N and a pressure 6–16 kPa were associated with no or mild pain.

scholarly journals Pressure-based Compression Guidance of the Breast in Digital Breast Tomosynthesis Using Flexible Paddles Compared to Conventional Compression

2020 ◽  
Vol 2 (6) ◽  
pp. 541-551
Author(s):  
Monique G J T B van Lier ◽  
Jerry E de Groot ◽  
Serge Muller ◽  
Gerard J den Heeten ◽  
Kathy J Schilling
Keyword(s):  
Digital Breast Tomosynthesis ◽  
Control Device ◽  
Institutional Review Board ◽  
Target Range ◽  
Compression Pressure ◽  
Breast Tomosynthesis ◽  
Breast Compression ◽  
Institutional Review Board Approval ◽  
Institutional Review ◽  
Breast Thickness

Abstract Objective We investigated the effect of introducing a pressure-based flexible paddle on compression parameters and user and patient experience of digital breast tomosynthesis (DBT) combined with patient-assisted compression or technologist compression. Methods After institutional review board approval, women with a DBT appointment who gave informed consent received pressure-based flexible paddle breast compression. Eight lights on the paddle were illuminated (1.9 kPa per light) as pressure was applied, aiming for an 8–13.9 kPa target range. The compression level was applied by the technologist or the participant utilizing a remote control device. The participant’s and technologist’s experiences were assessed by a questionnaire. Compression parameters were compared to previous examinations. Comparative statistics were performed using t-tests. Results Pressure-based compression (PBC) was judged to be similar or more comfortable compared with previous traditional exams (80%, 83/103), and 87% (90/103) of participants would recommend PBC to friends. Pressure variability decreased for craniocaudal (CC) views (-55%, P < 0.001) and mediolateral oblique (MLO) views (-34%, P < 0.0001). Subgroup analysis showed a similar glandular dose for CC views, while breast thickness was reduced (-3.74 mm, P < 0.0001). For MLO views, both glandular dose (-0.13 mGy, P < 0.0001) and breast thickness were reduced (-6.70 mm, P < 0.0001). Mean compression parameters were similar for technologist compression and patient-assisted examinations. Conclusion Use of the pressure-based flexible paddle in DBT, with or without patient-assisted compression, improved participant and technologist experience and reduced compression pressure variability, mean breast thickness, and glandular dose.

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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