Volume 1 - Supplement Issue 1: Abstracts of International Tehran Breast Cancer Congress                   Multidiscip Cancer Investig 2017, 1 - Supplement Issue 1: Abstracts of International Tehran Breast Cancer Congress: 0-0 | Back to browse issues page


XML Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Moshiri S, Fazilat Moaddeli M E, Sefidbakht S, Zarei F, Pishdad P, Gholami Bardeji Z, et al . Comparison of the Geometric and Digital Magnification to Detect Micro-Calcification in Mammogram. Multidiscip Cancer Investig 2017; 1
URL: http://mcijournal.com/article-1-176-en.html
Abstract:   (4732 Views)
Introduction: For early diagnosis of breast cancer, definitive confirmation can be reached by identification of micro-calcifications, by mammography. This study examines the relative advantages of magnification of mammography images, obtained by (a) geometric, (b) digital zoom, for which there is still no agreement.
Materials and Methods: The study was conducted with two different digital mammography systems, having geometrical and digital magnification facilities. ACR phantom containing different sizes of Al2O3 specks, to mimic micro-calcification, was used. Phantom images in contact and 1.5 X magnification modes were taken. Usual glandular dose measurements were also done. These images were assessed by 3 radiologists and three medical physicists. Model calculations and statistical analyses were used to judge the relative preferences for the two modes of magnification.
Results: It is seen that in 90% cases, detection is possible up to the 4th group of specks with 0.24 mm, by both these above method of magnification while the AVG (average glandular dose) values measured by multi-function meter were 0.88 mGy and 2.1 mGy at the contact and 1.5X positions respectively.
Conclusions: We find that geometric and digital zoom are both capable to detect micro- calcifications, though the mean radiation dose for 1.5X geometric magnification case is nearly double of that in the digital magnification case (contact position). Thus, from radiation dose considerations, the digital magnification zoom may be preferred to geometric magnification, in digital mammography systems, though their abilities to detect micro-calcification are nearly the same.
Full-Text [PDF 62 kb]   (1850 Downloads)    
Select article type: Original/Research Article | Subject: Supportive and Palliative Care
Received: 2017/11/1 | Accepted: 2017/11/1 | ePublished: 2017/11/1

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Multidisciplinary Cancer Investigation

Designed & Developed by : Yektaweb