This has some very interesting possibilities...
http://www.wired.com/wiredscience/2012/05/gamma-ray-lens/ (http://www.wired.com/wiredscience/2012/05/gamma-ray-lens/)
There goes the meter qualifications! In comes the goggle quals. Well, there may be a camera qual before we go full goggle. In regards to camera usage of this type of lens, maybe a light field camera (Lytro) with one of these will let you shoot the entire operating deck, sub floors, etc., and set your rad postings on a map for the junior Juniors to install.
Interesting, but unfortunately destined to be just a laboratory curiosity because of the tiny amount of refraction. There are gamma ray imagers on the market now, the most sensitive which are coded aperture cameras. My firm manufactures the GammaCam, a coded aperture camera. Check out gammacamnow.com for more info.
The article hinted that high Z number nuclei might refract better, but as we see in Bremsstralung, that refraction is so harsh to the gamma that the wavelength is much longer. My hunch is that silicon showed a tiny smidgen of a hint of refraction because of its diamond cubic crystal structure. Maybe some experiments with PZT might work?