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- W2366867666 abstract "OBJECTIVE: To measure planning target volume margin in cone beam CT(CBCT) guided conformal radiotherapy(IG-CRT) of brain metastases carcinoma.METHODS: Fourteen consecutive cases of brain metastases carcinoma were treated with IG-CRT.All the patients were immobilized on a head and neck support pad using a customized thermoplastic masks(ORFIT).CRT technique was performed by using the Eclipse planning system.Before the radiotherapy,3-dimentional CBCT/ planning CT was matched at every first ten fractions of each patient by using IGRT system.After CRT,3-D CBCT/ planning CT was matched again.RESULTS: The standard deviation of overall systematic error was 0.92 mm in the right-left(X axis),0.95 mm in the anterior-posterior(Y axis),1.10 mm in the superior-inferior(Z axis)directions.The corresponding SDs of the random errors were 2.19 mm(X),1.87 mm(Y),1.94 mm(Z),respectively.The estimated margins required from clinical target volume(CTV)-planning target volume(PTV) were calculated according to the Van Herk formula being 3.2 mm(X),3.5 mm(Y),4.0 mm(Z).CONCLUSION: Brain metastases carcinoma can display on KVCBCT with injecting a contrast medium into a vein.4 mm CTV-PTV margin has been adopted in IG-CRT on brain metastases carcinoma." @default.
- W2366867666 created "2016-06-24" @default.
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- W2366867666 date "2009-01-01" @default.
- W2366867666 modified "2023-09-26" @default.
- W2366867666 title "Measuring planning target volume margin in kV cone beam CT guided three-dimensional conformal radiotherapy of brain metastases carcinoma" @default.
- W2366867666 hasPublicationYear "2009" @default.
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