[Dosimetric verification of the intensity modulated radiation therapy].
OBJECTIVE
To research the method of dosimetric verification of the intensity modulated radiation therapy (IMRT).


METHODS
The IMRT treatment plans were designed by Eclipse TPS and were implemented in Varian ClinacIX LA with 6MV X-ray. The absolute point doses were measured using a PTW 0.6 cc ion chamber with UNIDOS E dosimeter and the planes dose distributions were measured using PTW 2D-Array ion chamber in the phantom.


RESULTS
The error between the measured dose and calculated dose in the interesting points was less than 3%. The points passed ratio was more than 90% in gamma analysis method (3 mm 13%) about the plane dose distribution verification.


CONCLUSIONS
The method of dosimetric verification of IMRT is reliable and efficient in the implementation.
Zhang
Yuhai
Y
Radiotherapy Dept., The PLA 309th Hospital, Beijing, 100091. zyh309@yahoo.com.cn
Gao
Yang
Y
D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D050397:Radiotherapy, Intensity-Modulated / Q000379:methods*