Michael Kaus Thomas Netsch Sven Kabus Vladimir Pekar Todd McNutt Bernd Fischer Estimation of Organ Motion from 4D CT for 4D Radiation Therapy Planning of Lung Cancer. 1017-1024 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3217&spage=1017 2004 conf/miccai/2004-2 MICCAI (2) db/conf/miccai/miccai2004-2.html#KausNKPMF04