螺旋断层IMRT全骨髓照射流程可行性探讨

doi:10.3760/cma.j.issn.1004-4221.2018.01.020

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Abstract

Objective To introduce the therapeutic procedures of helical tomotherapy based total marrow irradiation(HT-TMI), and validate the feasibility of TMI.Methods At 1 week before bone marrow transplantation, 12 patients received TMI conditioning regimen at a prescriptive dose of 12 Gy in 3 times, once daily. Patient immobilization, CT simulation, target delineation, plan design and dosimetric verification were implemented in sequence according to the TMI procedures. The dosimetric paramaters of the target and normal tissues were analysed. The correlation between the dose verification and image-guided Results was observed.Results Compared with total body irradiation(TBI), TMI could significantly reduce the irradiation dose to normal tissues. The median dose D50 of all normal tissues except the oral cavity were lower than 6 Gy, where The D50 of lens, brain, lung and liver are (1.8±0.1) Gy, (5.7±0.2) Gy, (5.2±0.2) Gy, and (4.6±0.2) Gy, respectively. Pass rate of γ Index was larger than 95% with 3mm/3% criterian for each section. The positioningerror of head and neck was relatively lower than that of pelvis at x-axis, and was higher at z-axis.Conclusions Helical tomotherapy based TMI is a feasible and reasonable approach, which has evident dosimetric advantage.

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	Articles by authors
	Zhu Feng
	Wu Weizhang
	Chang Dongshu
	Zhu Fuhai
	Wang Yong
	Li Xinji
	Wang Shanshan
	Wei Qiang
	Xia Tingyi
	Wang Yingjie

Key words： Total marrow irradiation Intensity-modulated radiotherapy Feasibility

Received: 26 December 2016

Fund:

Capital Public Health Project (Z15110000391511);College Project of General Air Force Hospital (KZ2014026)

Corresponding Authors: Wang Yingjie,Email Wangyj9999@163.com;Xia Tingyi,Email 68434886@163.com

Cite this article:

Zhu Feng,Wu Weizhang,Chang Dongshu et al. Feasibility of helical tomotherapy intensity-modulated radiation therapy applied in total marrow irradiation[J]. Chinese Journal of Radiation Oncology, 2018, 27(1): 94-100.

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http://journal12.magtechjournal.com/Jweb_fszlx/EN/10.3760/cma.j.issn.1004-4221.2018.01.020 OR http://journal12.magtechjournal.com/Jweb_fszlx/EN/Y2018/V27/I1/94

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