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Radiological physics: fresh facts and future fancies.

Abstract Recent developments in radiological physics are briefly reviewed and an attempt is made to extrapolate these forward in time. The author expects to see (1) the establishment of a much more satisfactory data base in radiological physics; (2) a clarification of concepts in radiation protection; (3) the demise of the present special radiological units and their replacement by SI units; (4) the establishment of calorimetric standards of absorbed dose; (5) a decrease in the use of the quantity exposure; (6) further development of condensed state dosimetry in general and solid state dosimetry in particular; (7) neutron dosimetry more closely approaching the accuracy of photon dosimetry; (8) more use of computers and radiations other than photons in radiotherapy; (9) the growth of quantitative measurement in radiological diagnosis; and (10) greater use of radiological physics in the determination of body composition.