Ever since the experimental therapeutic use of the roentgen ray was stimulated by the recognition of its occasional accidental, associated action on cutaneous structures, the medical press has constantly contained a generous literature describing the therapeutic value of the agent and the proper methods of its application. For many years there were almost as many technics of application and measurement as there were operators, with the result that the popularity of the agent was as fluctuating as were the results obtained from its usage. As is the history with many discoveries, out of the confusion that first clouds true values there emerged a general principle which, if conscientiously adhered to and tempered by judgment and experience, brought about a fair percentage of favorable results. Thus, while indefinite in many respects, the so-called fractional method of treatment for many years was the recognized technic. Briefly, this method was one by which
KINGERY LB. PRECISION IN DERMATOLOGIC ROENTGEN THERAPY: THE VALUE OF RECENT REFINEMENTS IN APPARATUS: PRELIMINARY REPORT. Arch Derm Syphilol. 1924;9(6):738–745. doi:10.1001/archderm.1924.02360240065002
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