MEASUREMENT OF THE CONTRALATERAL BREAST PHOTON AND THERMAL NEUTRON DOSES IN BREAST CANCER RADIOTHERAPY: A COMPARISON BETWEEN PHYSICAL AND DYNAMIC WEDGES

被引:17
|
作者
Bagheri, Hamed [1 ]
Mahdavi, Seyed Rabie [2 ]
Shekarchi, Babak [1 ]
Manouchehri, Farhad [3 ]
Farhood, Bagher [4 ]
机构
[1] Aja Univ Med Sci, Radiat & Wave Res Ctr, Tehran, Iran
[2] Iran Univ Med Sci, Dept Med Phys, Tehran, Iran
[3] Nucl Sci & Rechnol Res Inst NSTRI, Tehran, Iran
[4] Univ Tehran Med Sci, Med Phys & Med Engn Dept, Fac Med, Tehran, Iran
关键词
INTENSITY-MODULATED RADIOTHERAPY; AXILLARY LYMPH-NODES; 20-YEAR FOLLOW-UP; RANDOMIZED-TRIAL; CONSERVING SURGERY; RADIATION-EXPOSURE; IRRADIATION; FIELD; THERAPY; IMRT;
D O I
10.1093/rpd/ncx076
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This research aimed to measure the received photon and thermal neutron doses to contralateral breast (CB) in breast cancer radiotherapy for various field sizes in presence of physical and dynamic wedges. The measurement of photon and thermal neutron doses was carried out on right breast region of RANDO phantom (as CB) for 18 MV photon beams. The dose measurements were performed by thermoluminescent dosimeter chips. These measurements obtained for various field sizes in presence of physical and dynamic wedges. The findings of this study showed that the received doses (both of the photon and thermal neutron) to CB in presence of physical wedge for 11 x 13, 11 x 17 and 11 x 21 cm(2) field sizes were 5.92, 6.36 and 6.77% of the prescribed dose, respectively as well as for dynamic wedge were 2.92, 4.63 and 5.60% of the prescribed dose, respectively. The results showed that the received photon and thermal neutron doses to CB increase with increment of field sizes. The received photon and thermal neutron doses to CB in presence of physical wedge were more than dynamic wedge. According to obtained findings, it is suggested that using a dynamic wedge is preferable than physical wedge, especially for medial tangential field.
引用
收藏
页码:73 / 81
页数:9
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