Welcome
X rays were discovered in 1895 and applied shortly thereafter to medicine, but most of the
subsequent developments in x-ray imaging have been linear enhancements to sources and detectors,
leaving some of the physics yet to be fully harnessed. Over the past 25 years, the implementation
of various digital imaging receptor technologies and computer power in hospitals and clinics,
with the retirement of x-ray film, has made many new possibilities practical.
I do research at the "front end" of x-ray imaging, particularly on systems for using scattered
radiation, dual-energy radiography, and focal spot mapping. My graduate and honours students
generally hone their talents and expand our field's horizons via a mix of experiment, modelling,
and computation.
For more info, please explore via the links at left.
Paul C Johns