X-ray vision.
Recent correspondence initiated by Dr. Cochrane Shanks' account of the sensation of light experienced during a CAT scan recalls an article on vision by X rays by R. R. Newell (1948).
Place of new contrast media in renal failure.
It was with great interest that I read “The effect of osmotic diuresis on urinary iodine concentration” (Webb et al., 1978) in your February issue. I believe some observations from our recent experiments and calculations may be of interest and cast some additional light on the place of contrast media of reduced osmolality in advanced renal failure.
The Centigray as the S.I. unit of dose
I wish to ask for support for the use of the centigray (cGy) as the practical S.I. unit of dose for clinical radiotherapy. This proposal has two obvious advantages. Firstly, and most importantly, the centigray is identical numerically with the rad.