8Bi jhold J,van Herk M,Vijlbrief R, et al. Fast evaluation of patient set - up during radiotherapy by aligning features in portal and simulator imagesJ[ J ]. Physmed Biol, 1991,36 (12) : 1665.
9Stroom JC, de Boer JC, HuizengaH, et al. Inclusion of geometrical uncertain ties in radiotherapy treatment planning by means of coverage probability[ J ]. Int J Radiat Oncol Biol phys, 1999,43 (4) :905.
