International Conference on Advances in Radiation Oncology #ICARO2

Session

Thursday afternoon - Poster Presentations - Screen5

Jun 22, 2017, 3:30 PM

Conveners

Thursday afternoon - Poster Presentations - Screen5

• Oleg Belyakov (IAEA)

31. Comparison of various radiation therapy techniques in breast cancer with inclusion of internal mammary nodes by use of a RANDO phantom and thermoluminescent dosimeter

Mohammad Taghi Bahreyni Toossi (Mashhad University of Medical Sciences)

6/22/17, 3:30 PM

Poster

**Introduction:** Breast cancer treatment techniques include mainly surgery, radiation therapy, chemotherapy, hormone therapy, targeted therapy. Breast cancer patients may experience local-regional recurrence in the chest wall or regional nodes. A combination of surgery followed by radiation therapy significantly reduces the risk of local recurrence. One of the controversial issues of the...

67. Optimisation of protection in breast mamamography

Hadijah NDAGIRE

6/22/17, 3:35 PM

Poster

**ABSTRACT BACKGROUND Xray mammography is the most reliable method of detecting breast cancer being the method of choice for b treast screening program in many countries ,high mammogram s have to be obtained at a reduced breast dose in combination of correct equipment used **Methodology** linear attenuation coefficients for different types of breast tissue are similar in magnitude...

298. Dosimetric verification of the small field dose calculation using Acuros XB dose algorithm for heterogeneous media.

Abdelkader Toutaoui (Départment de Physique Médicale et de Radioprotection, Hôpital Chahids Mahmoudi, Tizi Ouzou, Algeria)

6/22/17, 3:40 PM

Dosimetry

Poster

The experimental determination of relative output factors presents the greatest challenge, especially for small fields with different detectors yielding measurements that exhibit a high degree of uncertainty and deviate significantly (Westermark et al., 2000). The position and configuration of jaws above tertiary collimators could change dosimetric characteristics in both SRS and IMRT. The X-Y...

300. Dosimetric verification of the small field calculation using Acuros XB dose algorithm for homogeneous and heterogeneous media.

Abdelkader Toutaoui (Départment de Physique Médicale et de Radioprotection, Hôpital Chahids Mahmoudi, Tizi Ouzou, Algeria)

6/22/17, 3:45 PM

Dosimetry

Poster

In this study, the comparison of dosimetric accuracy of Acuros XB and AAA algorithms were investigated for small radiation fields incident on homogeneous and heterogeneous geometries. Small open fields of Varian iX21 linear accelerator on a 6 MV photon beam 1×1, 2×2, 3×3, 4×4 cm2 were used for this study. The fields were incident on homogeneous phantom and phantom containing lung, air, and...

309. Beam quality index for arbitrary reference fields.

Yury Kirpichev (CRT "Oncostop")

6/22/17, 3:50 PM

Dosimetry

Poster

**Introduction.** Readings of detectors used for reference dosimetry depend on beam energy therefore reference beam calibration requires utilization of beam quality correction factor kQ,Q0. This correction factor was calculated and published in IAEA TRS – 398 for wide range of detectors and beam quality indexes (Q). Beam quality index is used because in clinical practice it’s impossible to...

330. A simplified approach of measuring beam attenuation through treatment couch and immobilization devices using electronic portal imaging devices

Sivananthan Sarasanandarajah (Peter MacCallum Cancer Centre, Australia)

6/22/17, 3:55 PM

Dosimetry

Poster

Introduction With the increasing concern to measure beam attenuation caused by treatment couch and immobilization devices [1, 2], the objective of this study is to propose a simple and fast method to measure beam attenuation using the current generation of clinically available amorphous silicon electronic portal imaging device (a-Si EPID) without complex procedures to convert the signal to...