Journal of roentgenology (1919) (14755014804)

Identifier: journalofroentge2191west (find matches)
Title: Journal of roentgenology
Year: 1919 (1910s)
Authors: Western Roentgen Society
Subjects: Radiology
Publisher: Iowa City, Iowa : Western Roentgen Society, 1918-1919
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities



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n be takenfrom the kilovolt meter or the ammeter in the filamentcircuit; if all three meters are temporarily out of order,the spark gap can be set at the desired distance and thecurrent be kept just spitting across the terminals. To work out the dosage in time with three or four dif-ferent filters requires about three months experiment.The various mechanical devices for measuring dosage areapt to be disappointing and perhaps dangerous. The per-sonal equation involved and the multiplicity of factors thatcan affect their final results, are possible elements of errorwhich permit much more exact results to be secured byrelying entirely on electrical measurements and arithmetic. ROENTGEN THERAPY TECHNIQUE — ERSKINE 215 The only factors which need be varied are time and filterand by the exercise of good judgment in their manipulationthe quality of rays best suited to the needs of the patientcan be selected from the beam and administered to him inas definite a dose as any drug. AHODd ADCH.
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4 3 c D r r <4 i Dose- through area £ = -yi Q c D Dose Through areas /?DC P ; /3.S* ^ Fig. I. Diagram showing the relative efficiency of short and long anode skindistances in deep therapy. 325-30 Higley Building 216 THE JOURNAL OF ROENTGENOLOGY INTENSITY