Preoperative staging of rectal carcinoma by computed tomography and 0.15 T magnetic resonance imaging. - Hodgman,C.G.; McCarty,R.L.; Wolf,B.G.; May,G.R.; Berquist,T.H.; Sheedy,P.F.; Beart,R.W.; Spencer,R.J. (Dis Colon Rect, 1986)