MO-E-I-609-06: Squared Contrast-Noise Ratio Per Dose and Rh-Filter Thickness for Digital Mammography

2005 ◽  
Vol 32 (6Part14) ◽  
pp. 2065-2065
Author(s):  
T Nishino ◽  
X Wu ◽  
R Johnson
Keyword(s):  
Digital Mammography ◽  
Noise Ratio ◽  
Filter Thickness

Thickness of Molybdenum Filter and Squared Contrast-to-Noise Ratio per Dose for Digital Mammography

2005 ◽  
Vol 185 (4) ◽  
pp. 960-963 ◽  
Author(s):  
Thomas K. Nishino ◽  
Xizeng Wu ◽  
Raleigh F. Johnson
Keyword(s):  
Digital Mammography ◽  
Noise Ratio

SU-E-I-93: Comparison of the AEC Thickness Tracking Using the Signal- Difference-To-Noise Ratio in 113 Flat-Panel Digital Mammography Units

2011 ◽  
Vol 38 (6Part5) ◽  
pp. 3417-3417
Author(s):  
Y Hwang ◽  
C Chen ◽  
H Tsai ◽  
C Chen ◽  
C Chui ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Flat Panel ◽  
Noise Ratio

scholarly journals Image Quality and Radiation Dose for Fibrofatty Breast using Target/filter Combinations in Two Digital Mammography Systems

2020 ◽  
Vol 10 ◽  
pp. 56
Author(s):  
Khaled Alkhalifah ◽  
Akram Asbeutah ◽  
Ajit Brindhaban
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Digital Mammography ◽  
High Performance ◽  
Signal To Noise Ratio ◽  
Filter Material ◽  
Skin Dose ◽  
Tissue Equivalent ◽  
Entrance Skin Dose ◽  
Noise Ratio

Objectives: The aim of this study was to determine the optimum combinations of target and filter materials for various X-ray tube voltage settings, as well as their effects on image quality and radiation dose. This was done using different digital mammography (DM) imaging systems with a breast equivalent phantom. Material and Methods: Two DM units with a tungsten (W) target, silver (Ag), and rhodium (Rh) filters and dual molybdenum (Mo) and Rh targets/filters were used. A tissue-equivalent mammography phantom of 6 cm thickness equivalent to a fibrofatty breast was exposed 20 times to different target/filter material combinations (W/Rh, W/Ag, Rh/Rh, Mo/Rh, and Mo/Mo) and various kV settings (28–34 kV). The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated for each exposure. Results: The W/Ag combination resulted in the lowest entrance skin dose and mean glandular dose (MGD). The MGD for the W/Rh combination was 60% less than that of the W/Ag combination at 34 kV (P < 0.05). There was a direct relationship in the SNR with the Mo/Mo, Mo/Rh, and Rh/Rh combinations and an inverse relationship with the CNR in the 34 kV range. There were statistically significant differences between all five target/filter combinations, and the best SNR and CNR were observed for the W/Rh combination with a reduced radiation dose in the range of 28–30 kV (P < 0.05). Conclusion: For a breast thicknesses of 6 cm with a fibrofatty nature, the W/Rh combination delivers high performance in terms of image quality at a lower dose.

A novel method for contrast-to-noise ratio (CNR) evaluation of digital mammography detectors

2009 ◽  
Vol 19 (9) ◽  
pp. 2275-2285 ◽  
Author(s):  
P. Baldelli ◽  
N. Phelan ◽  
G. Egan
Keyword(s):  
Digital Mammography ◽  
Novel Method ◽  
Noise Ratio

Application of European protocol in the evaluation of contrast-to-noise ratio and mean glandular dose for two digital mammography systems

2008 ◽  
Vol 129 (1-3) ◽  
pp. 231-236 ◽  
Author(s):  
W. E. Muhogora ◽  
A. Devetti ◽  
R. Padovani ◽  
P. Msaki ◽  
F. Bonutti
Keyword(s):  
Digital Mammography ◽  
Mean Glandular Dose ◽  
Noise Ratio
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