|Table of Contents|

Clinical application of thermoplastic membrane plus balloon combined with OPS technique in radiotherapy of liver cancer

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

Issue:
2020 03
Page:
459-462
Research Field:
Publishing date:

Info

Title:
Clinical application of thermoplastic membrane plus balloon combined with OPS technique in radiotherapy of liver cancer
Author(s):
Liu YuGe BinbinWang JunhuiZhao YongliangLiu HaitaoChu Kaiyue
Radiology Department,Nantong Tumor Hospital,Nantong University Affiliated Tumor Hospital,Jiangsu Nantong 226361,China.
Keywords:
simple abdominal pressureoptical positioning systempatient setup errorliver cancer
PACS:
R735.7
DOI:
10.3969/j.issn.1672-4992.2020.03.024
Abstract:
Objective:Simple abdominal pressure (SAP) combined with optical positioning system was designed to study the effect of placement on liver cancer radiotherapy and its clinical application value in precise radiotherapy of thoracic and abdominal tumors.Methods:This study was divided into two comparison groups according to the placement technique of liver cancer patients.Each group selected 15 patients,which was the control group with free breathing routine positioning and the experimental group of SAP combined with OPS technique to control the respiratory amplitude localization.Firstly,the tumor motility of the two groups of patients under the simulator was observed,and then the design plan of the target area was delineated.Before the treatment,the cone beam computed tomography (CBCT) was performed to verify the tumor motility and treatment.The linearity error was analysed at the time of X (left and right direction),Y (head and foot direction),and Z (face and back direction).Results:The tumor motility of the experimental group and the control group in the X,Y,and Z directions under the simulator were (2.461 5±0.660 2,3.923 1±1.187 5)mm,(5.692 3±1.548 4,19.076 9±4.499 3)mm,(3.230 8±1.165 8,8.692 3±2.982 9)mm,and the corresponding P values in each direction were P=0.001,P<0.001,P<0.001.The linear positioning errors of the experimental group and the control group in the X,Y,and Z directions were respectively (2.175 3±0.464 8,4.940 0±0.573 3)mm,(1.435 3±0.304 9,6.408 0±0.555 0)mm,(2.288 7±0.591 4,4.967 3±0.353 9)mm,and the corresponding P values in all directions are less than 0.001.Conclusion:Compared with the conventional positioning technology,the designed SAP combined with OPS technology can significantly reduce the tumor respiratory motility in the treatment of liver cancer patients and improve the positioning accuracy during treatment.And the treatment accuracy of chest and abdomen tumors has clinical application value.

References:

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