|Table of Contents|

Radiation dose to the inner ear in 50 nasopharyngeal carcinoma patients treated with intensity-modulated radiation therapy

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2017 06
Page:
944-948
Research Field:
Publishing date:

Info

Title:
Radiation dose to the inner ear in 50 nasopharyngeal carcinoma patients treated with intensity-modulated radiation therapy
Author(s):
Jiang ChaoyangGao HuiZhang LingPan XingguoXian JingZhang Tao
Department of Radiation Oncology,Chengdu Military General Hospital of PLA,Sichuan Chengdu 610083,China.
Keywords:
inner earnasopharyngeal carcinomaintensity modulated radiotherapydose distribution
PACS:
R739.63
DOI:
10.3969/j.issn.1672-4992.2017.06.030
Abstract:
Objective:To analyze the dose of bilateral inner ear in patients with nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiotherapy (IMRT).Methods:A total of 50 NPC cases from May to December 2015 received the IMRT with 30 fractions for pathological diagnosis.An attending physician contoured the bilateral cochlea、vestibule and internal auditory canal in the original CT images.The same weightings were given to these structures during optimization in treatment planning.Finally,we analyzed the dose volume histogram(DVH) of these structures,including the maximum dose(Dmax),minimum dose(Dmin) and the average dose (Dmean).Results:The maximum dose of the left cochlea (Dmax),minimum dose (Dmin) and the average dose (Dmean) were presented respectively 5 366.3cGy,3 981.2cGy,4 550.1cGy.The left vestibule were 4 323.2cGy,3 310.8cGy,3 821.1cGy,respectively.The left internal auditory canal were 5 290.8cGy,3 828.7cGy,4 453.6cGy,respectively.And the maximum dose of the right cochlea (Dmax),minimum dose (Dmin) and the average dose (Dmean) were presented respectively 5 344.5cGy,3 954.2cGy,4 550.1cGy.The right vestibule were 4 368.3cGy,3 262.9cGy,3 796.0cGy,respectively.The right internal auditory canal were 5 165.0cGy,3 765.2cGy,4 375.2cGy,respectively.Conclusion:It can not only guarantee the dose of target area but also effectively reduce the dose of inner ear during the optimization of NPC treated with IMRT.

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Memo

Memo:
成都市科技惠民技术研发项目(编号:2014-HM01-00087-SF)
Last Update: 2017-01-26