optimized HYPR-LR 7 8 John M. Floberg 9 Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, 10 Madison, WI 53705 11 12 Charles A. Mistretta and Jamey P. Weichert 13 Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, 14 Madison, WI 53705 and Department of Radiology, University of Wisconsin-Madison, 600 15 Highland Avenue, Madis...