there are a non-trivial number of excellent physicists and mathematical biologists on faculty here at rockefeller. besides radiology/physiology, here are some other interesting areas of research:
http://www.rockefeller.edu/research/area_summary.php?id=2
they are working on the following topics:
*Kinetics of biomolecular recognition
*DNA computation
*Dynamics of cytoskeletal assembly and movement
*Information theory approaches to visual perception and bird song
*Statistical methods of human genetic mapping
*Population dynamics, mathematical modeling of disease transmission and analysis of foodwebs
*Turbulence in physical systems using the mathematics of fractal geometry
*Studies of proton-antiproton collisions using the Collider Detector at Fermilab [ok, not so much bio]
*Quantum field theory and string theory [nor here]
*Genome search for promoters
*Study of biochemical networks
*Quantum dots and other bio-resistant fluorophores