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- W2382034369 abstract "OBJECTIVE:To compare the traditional radiotherapy technique and 3D conformal radiotherapy techniques for esophagus carcinoma,regarding conformal index(CI),dose volume of normal tissue(lung,etc),and normal tissue complication probability(NTCP).METHODS:A total of 28 cases of esophagus carcinoma(middle thoracic section)were performed to acquire digital imaging information.By using 3D treatment planning system,3 radiotherapy techniques(A:traditional radiotherapy;B:conformal radiotherapy using 3 fields;C:conformal radiotherapy using 5 fields)were compared.When prescribing 66 Gy,CI of tumor target,the irradiated volume and dose of normal lung tissue and NTCP were compared among the 3 techniques.The incidences of radiation pneumonitis were estimated by calculating the NTCP of lung.RESULTS:After comparing 3 techniques of radiotherapy,the results were as follows:1)conformality index(CI)of target was improved by conformal radiotherapy from 0.55±0.09 to 0.76±0.04 and 0.78±0.06 when A,B and C 3 radiotherapy techniques were compared.2)The mean dose of lung was from 16.54 ±2.35 Gy to 13.26±1.93 Gy and 13.38±1.61 Gy;V20 from(32.95±6.432)% to(23.01±6.25)% and(24.8±4.47)%;V30 from(17.25±4.96)% to(12.18±3.66)% and(6.75±2.93)%.3)NTCP of lung deereased from(6.9±6.86)% to(1.14±1.11)% and(1±1.02)%.The 3 techniques of A,B,C had significant differences,P=0.000.CONCLUSIONS:Conformal radiotherapy technique can supply optimal dose distribution for target,while significantly reduce irradiated volume and dose to normal lung tissue.As a result,the probability of radiation pneumonitis is decreased." @default.
- W2382034369 created "2016-06-24" @default.
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- W2382034369 date "2007-01-01" @default.
- W2382034369 modified "2023-09-25" @default.
- W2382034369 title "Relationship between radiation dose and radiation peumonitis of 3D conformal radiation for esophagus carcinoma" @default.
- W2382034369 hasPublicationYear "2007" @default.
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