Patni H K, Nadar M Y, Akar D K, Bhati S, Sarkar P K
Health Physics Division, Bhabha Atomic Research Centre, Mumbai, India.
Radiat Prot Dosimetry. 2011 Nov;147(3):406-16. doi: 10.1093/rpd/ncq462. Epub 2010 Dec 8.
The adult reference male and female computational voxel phantoms recommended by ICRP are adapted into the Monte Carlo transport code FLUKA. The FLUKA code is then utilised for computation of dose conversion coefficients (DCCs) expressed in absorbed dose per air kerma free-in-air for colon, lungs, stomach wall, breast, gonads, urinary bladder, oesophagus, liver and thyroid due to a broad parallel beam of mono-energetic photons impinging in anterior-posterior and posterior-anterior directions in the energy range of 15 keV-10 MeV. The computed DCCs of colon, lungs, stomach wall and breast are found to be in good agreement with the results published in ICRP publication 110. The present work thus validates the use of FLUKA code in computation of organ DCCs for photons using ICRP adult voxel phantoms. Further, the DCCs for gonads, urinary bladder, oesophagus, liver and thyroid are evaluated and compared with results published in ICRP 74 in the above-mentioned energy range and geometries. Significant differences in DCCs are observed for breast, testis and thyroid above 1 MeV, and for most of the organs at energies below 60 keV in comparison with the results published in ICRP 74. The DCCs of female voxel phantom were found to be higher in comparison with male phantom for almost all organs in both the geometries.
国际放射防护委员会（ICRP）推荐的成人参考男性和女性计算体素模型被改编成蒙特卡罗输运代码FLUKA。然后利用FLUKA代码计算由于能量范围在15 keV至10 MeV的宽平行单能光子束从前向后和从后向前方向入射，在结肠、肺、胃壁、乳腺、性腺、膀胱、食管、肝脏和甲状腺中以空气中比释动能率表示的吸收剂量的剂量转换系数（DCC）。发现结肠、肺、胃壁和乳腺的计算DCC与ICRP第110号出版物中公布的结果吻合良好。因此，本研究验证了使用FLUKA代码结合ICRP成人体素模型计算光子器官DCC的方法。此外，评估了性腺、膀胱、食管、肝脏和甲状腺的DCC，并与ICRP第74号出版物中在上述能量范围和几何条件下公布的结果进行比较。与ICRP第74号出版物中的结果相比，在能量高于1 MeV时，乳腺、睾丸和甲状腺的DCC存在显著差异，在能量低于60 keV时，大多数器官的DCC也存在显著差异。发现在两种几何条件下，几乎所有器官的女性体素模型的DCC都高于男性模型。
