Optimization of image quality and average glandular dose in CR mammography

2007 ◽  
Author(s):  
Kimihiko Satoh ◽  
Takao Kuwabara ◽  
Hiroaki Yasuda ◽  
Satoshi Arakawa
Keyword(s):  
Image Quality ◽  
Average Glandular Dose

Impact on dose and image quality of a software-based scatter correction in mammography

2017 ◽  
Vol 59 (6) ◽  
pp. 649-656 ◽  
Author(s):  
Teresa Monserrat ◽  
Elena Prieto ◽  
Benigno Barbés ◽  
Luis Pina ◽  
Arlette Elizalde ◽  
...  
Keyword(s):  
Image Quality ◽  
Scatter Correction ◽  
Inverse Image ◽  
Clinical Image ◽  
Air Kerma ◽  
Average Glandular Dose ◽  
Standard Mode ◽  
Entrance Surface Air Kerma ◽  
Clinical Cases

Background In 2014, Siemens developed a new software-based scatter correction (Progressive Reconstruction Intelligently Minimizing Exposure [PRIME]), enabling grid-less digital mammography. Purpose To compare doses and image quality between PRIME (grid-less) and standard (with anti-scatter grid) modes. Material and Methods Contrast-to-noise ratio (CNR) was measured for various polymethylmethacrylate (PMMA) thicknesses and dose values provided by the mammograph were recorded. CDMAM phantom images were acquired for various PMMA thicknesses and inverse Image Quality Figure (IQFinv) was calculated. Values of incident entrance surface air kerma (ESAK) and average glandular dose (AGD) were obtained from the DICOM header for a total of 1088 pairs of clinical cases. Two experienced radiologists compared subjectively the image quality of a total of 149 pairs of clinical cases. Results CNR values were higher and doses were lower in PRIME mode for all thicknesses. IQFinv values in PRIME mode were lower for all thicknesses except for 40 mm of PMMA equivalent, in which IQFinv was slightly greater in PRIME mode. A mean reduction of 10% in ESAK and 12% in AGD in PRIME mode with respect to standard mode was obtained. The clinical image quality in PRIME and standard acquisitions resulted to be similar in most of the cases (84% for the first radiologist and 67% for the second one). Conclusion The use of PRIME software reduces, in average, the dose of radiation to the breast without affecting image quality. This reduction is greater for thinner and denser breasts.

Average glandular dose and phantom image quality in mammography

2007 ◽  
Vol 580 (1) ◽  
pp. 574-577 ◽  
Author(s):  
M. Oliveira ◽  
M.S. Nogueira ◽  
E. Guedes ◽  
M.C. Andrade ◽  
J.E. Peixoto ◽  
...  
Keyword(s):  
Image Quality ◽  
Phantom Image ◽  
Average Glandular Dose

Can the average glandular dose in routine digital mammography screening be reduced? a pilot study using revised image quality criteria

2005 ◽  
Vol 114 (1-3) ◽  
pp. 383-388 ◽  
Author(s):  
B. Hemdal ◽  
I. Andersson ◽  
A. Grahn ◽  
M. Håkansson ◽  
M. Ruschin ◽  
...  
Keyword(s):  
Pilot Study ◽  
Image Quality ◽  
Digital Mammography ◽  
Mammography Screening ◽  
Quality Criteria ◽  
Average Glandular Dose

scholarly journals The relationship between compression force, image quality and radiation dose in mammography

2009 ◽  
Vol 13 (4) ◽  
pp. 86 ◽  
Author(s):  
A Korf ◽  
C P Herbst ◽  
W ID Rae
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Computed Radiography ◽  
Compression Force ◽  
Logarithmic Mean ◽  
Allowable Limit ◽  
Breast Compression ◽  
Entrance Dose ◽  
Average Glandular Dose ◽  
The Relationship

Background. Mammography aims to obtain mammograms of best possible image quality with least possible radiation dose.1 Theoretically, an increase in breast compression gives a reduction in thickness, without changing the density, resulting in improved image quality and reduced radiation dose. Aim. This study aims to investigate the relationship between compression force, phantom thickness, image quality and radiation dose. The existence of a compression point beyond which increased compression gives a change in density rather than thickness is also considered. Method. Image quality is assessed with a contrast-detail phantom within Superflab phantom on a computed radiography (CR) mammography unit using automatic exposure control (AEC). Image quality is determined by visual inspection and image quality figure (IQF) scoring. The effect of compression and lesion depth on image quality is determined. Entrance and exit doses are calculated. The relationship between entrance dose, compression and thickness is investigated, as is the existence of a compression point beyond which a change in phantom density occurs. The average glandular dose (AGD) is calculated from the scanning average level (SAL) and logarithmic mean (LgM) according to Koen et al,2 and compared to the allowable limit. Results. The geometry effect was not observed. An improvement in image quality with increased compression was found. Entrance dose did decrease with increased compression. This trend was not observed with exit dose as AEC was used and exit dose was calculated from SAL values. The “change-in-density” point of compression was determined. Both LgM and SAL could be used successfully for AGD calculation.

Patient-Assisted Compression in Screening Mammography: Patient Experience and Image Quality

2019 ◽  
Vol 1 (3) ◽  
pp. 192-198 ◽  
Author(s):  
Brian N Dontchos ◽  
Christine E Edmonds ◽  
Sarah F Mercaldo ◽  
Randy C Miles ◽  
Katrina F Chu ◽  
...  
Keyword(s):  
Image Quality ◽  
Patient Experience ◽  
Breast Density ◽  
Breast Cancer Mortality ◽  
Screening Mammography ◽  
Linear Regression Models ◽  
Compression Force ◽  
Institutional Review ◽  
Average Glandular Dose ◽  
Similar Image Quality

Abstract Objective Screening mammography is critical to reduce breast cancer mortality, yet many women cite pain from compression as a reason they avoid this test. We evaluated patient experience and image quality in screening patients opting for a handheld patient-assisted compression (PAC) device. Methods After institutional review board approval, women screened between February and July 2018 with a synthetic 2D/tomosynthesis mammography unit were offered use of a handheld PAC device. Patient experience through survey, image quality, compression thickness, compression force, and average glandular dose were evaluated and compared between women opting for PAC and women opting for technologist-controlled compression (TC). Multivariable ordinal logistic and linear regression models were estimated to control for age and breast density. In addition, for women opting for PAC, image quality obtained with their current PAC mammogram was compared with that obtained with their prior TC mammogram, by using Wilcoxon/Pearson tests. Results Seventy-three percent of women preferred their mammogram experience with PAC compared with their prior mammogram without PAC. Women using PAC reported decreased anxiety compared with those using TC, after controlling for age and breast density (adjusted odds ratio [aOR] 0.22 [95% confidence interval (CI): 0.09–0.49]). There were no significant differences in image quality, compression thickness, or average glandular dose in exams for women using PAC compared with exams for women using TC. Women using PAC had significantly more compression force than women using TC had (P = 0.012). Conclusions Mammography with PAC improves patient experience and results in similar image quality compared with mammography with TC.

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