Abstract :

Purpose: this study was carried out to determine the amount of scatter radiation around three different models of digital mammography units may contribute to shielding calculations.

Objectives: measuring and comparing for scattered radiation at four orientations (4 x 90^o=360^o) round three mammography models.

Materials and methods: RADOS (RDS-120 Universal Survey Meter) device was used to measure scatter radiation at four orientations round three types of mammography digital models NM-GA, Liyum, and Mammomat. These orientations are backward, forward, left lateral, and right lateral. All measurements are taken in Craniocaudal projection.

Results: backward orientation has highest and right lateral has lowest intensity of scatter radiations when three models of digital mammography were used. Mammomat model with backward orientation was at highest 6.5μSv of intensity and NM-GA model at lowest intensity of 1.1 μSv from right lateral orientation.

Conclusions: The obtained measurements of scatter radiation at four different orientations may be used in a shielding calculation when NM-GA, Liyum, and Mammomat of mammography models are used.

---

Keywords :

mammography, orientations, Radiation, scatter.

---

References :

1. Broisman, A., T. Schlesinger, and Z. Alfassi, Measurement of the radiation dose and assessment of the risk in mammography screening for early detection of cancer of the breast, in Israel. Radiation protection dosimetry, 2011. 143(1): p. 113-116.
2. Fartaria, M.J., et al., Assessment of the mean glandular dose using LiF:Mg,Ti, LiF:Mg,Cu,P, Li2B4O7:Mn and Li2B4O7:Cu TL detectors in mammography radiation fields. Phys Med Biol, 2016. 61(17): p. 6384-99.
3. Künzel, R., et al., X‐ray spectroscopy applied to radiation shielding calculation in mammography. Medical physics, 2008. 35(8): p. 3539-3545.
4. Chetlen, A.L., et al., JOURNAL CLUB: Scatter Radiation Dose From Digital Screening Mammography Measured in a Representative Patient Population. AJR Am J Roentgenol, 2016. 206(2): p. 359-64; quiz 365.
5. Svahn, T.M., et al., Review of radiation dose estimates in digital breast tomosynthesis relative to those in two-view full-field digital mammography. Breast, 2015. 24(2): p. 93-9.
6. Amendoeira, I., et al., European guidelines for quality assurance in breast cancer screening and diagnosis. 2013.
7. Simpkin, D.J., Scatter radiation intensities about mammography units. Health Phys, 1996. 70(2): p. 238-245.
8. Baldelli, P., et al., Comprehensive dose survey of breast screening in Ireland. Radiation protection dosimetry, 2011. 145(1): p. 52-60.
9. Yang, K., X. Li, and B. Liu, Scatter radiation intensities around a clinical digital breast tomosynthesis unit and the impact on radiation shielding considerations. Medical physics, 2016. 43(3): p. 1096-1110.