Advances in research on clinical use of electronic portal imaging device(EPID) / 中国癌症杂志

ABSTRACT

Electronic portal imaging device(EPID) is now been used widely.EPID was initially used for the purpose of checking set-up error.There are two ways to verify set-up errors-on-line and off-line.With advanced knowledge about the dosimetry characteristics of EPID,the use of EPID for dosimetry verification was adapted from the research study to the clinic.EPID plays an important role in quality assurance of radiotherapy accessories including multileaf collimator(MLC)that has been most studied in the past couple of years.This article briefly reviews the clinical use of EPID.