Year : 2018 | Volume
: 14 | Issue : 2 | Page : 335--340
Calculation of the contrast of the calcification in digital mammography system: Gate validation
Dooman Arefan1, Alireza Talebpour2, Nasrin Ahmadinejhad3, Alireza Kamali Asl1
1 Department of Radiation Medicine Engineering, Shahid Beheshti University, Tehran, Iran
2 Department of Computer Engineering and Science, Shahid Beheshti University, Tehran, Iran
3 Department of Advanced Diagnostic and Interventional Radiology Research Center, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran
Purpose: Validation of the Gate tool in digital mammography image simulation from the viewpoint of image quality (contrast of calcifications).
Materials and Methods: The polymethyl methacrylate (PMMA) phantom containing aluminum foils in different thicknesses is used for measuring the contrast of calcifications in a real system. In this research, the phantom and mammography system have been simulated by the Gate tool with the maximum possible details. The contrast of the aluminum foil in simulations and practical method has been compared with each other and the standard errors in the mean (SEM) for various voltages of X-ray tube, aluminum foil, and PMMA thicknesses have been reported.
Results: Based on the obtained results, by increasing the X-ray tube voltage from 20 to 39 kVp, the image contrast has been decreased in both simulation and practical methods. The minimum and maximum average SEM of the contrast of the aluminum foils among various voltages between two simulations and practical methods for different PMMA thicknesses of 2, 4, and 6 cm have been reported as 0.0105 and 0.0117, 0.0049 and 0.0154, and 0.0037 and 0.0072, respectively.
Discussion: According to the SEM rate reported in this research for calculating the contrast of the aluminum foils in the mammography system based on simulation and practical methods, the capability of the Gate tool for simulating digital mammography system and the images created in it from the viewpoint of image contrast can be confirmed.
Dr. Alireza Talebpour
Department of Electrical and Computer Engineering, Shahid Beheshti University, Evin, Tehran
|How to cite this article:|
Arefan D, Talebpour A, Ahmadinejhad N, Asl AK. Calculation of the contrast of the calcification in digital mammography system: Gate validation.J Can Res Ther 2018;14:335-340
|How to cite this URL:|
Arefan D, Talebpour A, Ahmadinejhad N, Asl AK. Calculation of the contrast of the calcification in digital mammography system: Gate validation. J Can Res Ther [serial online] 2018 [cited 2020 Aug 14 ];14:335-340
Available from: http://www.cancerjournal.net/article.asp?issn=0973-1482;year=2018;volume=14;issue=2;spage=335;epage=340;aulast=Arefan;type=0