Automated and Human Determination of Threshold Contrast for Digital Mammography Systems

2006 ◽  
pp. 266-272 ◽  
Author(s):  
Kenneth C. Young ◽  
James J. H. Cook ◽  
Jennifer M. Oduko
Keyword(s):  
Digital Mammography ◽  
Threshold Contrast

scholarly journals Determination of DQE as a quantitative assessment of detectors in digital mammography: Measurements and calculation in practice

2021 ◽  
Vol 27 (3) ◽  
pp. 223-232
Author(s):  
Anna Wysocka-Rabin ◽  
Magdalena Dobrzyńska ◽  
Katarzyna Pasicz ◽  
Witold Skrzyński ◽  
Ewa Fabiszewska
Keyword(s):  
Digital Mammography ◽  
Quality Parameters ◽  
Test Device ◽  
Tube Voltage ◽  
International Standard ◽  
Air Kerma ◽  
Digital Detector ◽  
Quantitative Image ◽  
Tube Exit

Abstract Introduction: Advances in digital detector technology and methods of image presentation in digital mammography now offer the possibility of implementing mathematical assessment methods to quantitative image analysis. The aim of this work was to develop new software to simplify the application of the existing international standard for DQE in digital mammography and show in detail how it can be applied, using a Siemens Mammomat Inspiration as a model. Material and methods: Consistent with the IEC standard a 2 mm Al filter at the tube exit and images in DICOM format as raw data, without applying any additional post-processing were used. Measurements were performed for W/Rh anode/filter combination and different tube voltage values (26 ÷ 34 kV) without any anti-scatter grid. To verify new software doses ranging from 20-600 µGy were used in measurements. Exposure (air kerma) was measured using a calibrated radiation meter (Piranha Black 457, RTI Electronics AB, Sweden). MTF was determined, using an edge test device constructed specifically for this work. Results: It has been demonstrated that with the new software the DQE can be measured with the accuracy required by the international standard IEC 62220-1-2. DQE has been presented as a function of spatial frequency for W/Rh anode/filter combination and different tube voltage. Conclusions: New software was used successfully to analyze image quality parameters for the Siemens Mammomat Inspiration detector. This was done on the basis of an internationally accepted methodology. In the next step, mammographs with different detector types can be compared.

SU-EE-A2-05: Accuracy in the Determination of Microcalcification Thickness in Digital Mammography

2005 ◽  
Vol 32 (6Part2) ◽  
pp. 1898-1898
Author(s):  
M-E Brandan ◽  
V Grabski
Keyword(s):  
Digital Mammography

Threshold pixel size for shape determination of microcalcifications in digital mammography: a pilot study

2005 ◽  
Vol 114 (1-3) ◽  
pp. 415-423 ◽  
Author(s):  
M. Ruschin ◽  
B. Hemdal ◽  
I. Andersson ◽  
S. Börjesson ◽  
M. Håkansson ◽  
...  
Keyword(s):  
Pilot Study ◽  
Digital Mammography ◽  
Pixel Size ◽  
Shape Determination

Threshold contrast visibility of microcalcifications in digital mammography

2004 ◽  
Author(s):  
Ann-Katherine G. Carton ◽  
Hilde Bosmans ◽  
Dirk Vandenbroucke ◽  
Chantal Van Ongeval ◽  
Geert Souverijns ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Threshold Contrast

Determination of imaging performance of a digital mammography

2004 ◽  
Author(s):  
Yoshie Kodera ◽  
Miho Takamura ◽  
Emi Tsuboi ◽  
Masahisa Ogawa ◽  
Rie Suzuki ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Imaging Performance
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