During the past six years we have treated a number of patients suffering from acne by the modern roentgen-ray technic. One hundred and seventy cases have been followed carefully enough to be reported. All of these were private patients and all were watched as carefully as possible. During the war, Washington had a floating population and the result naturally is that we have lost sight of many persons and are unable to give the permanent results in these instances.
Beginning with the year 1900, numerous reports concerning the use of the roentgen ray in acne began to appear in the literature; many of these references are given by Pusey and Caldwell.1
At first treatments were given at short intervals according to the old divided dose technic. However, within the last six years, thanks largely to MacKee's pioneer work in America, the doses have been measured, and hence the intervals
HAZEN HH, EICHENLAUB FJ. THE ROENTGEN-RAY TREATMENT OF ACNE VULGARIS. Arch Derm Syphilol. 1921;4(5):671–679. doi:10.1001/archderm.1921.02350240114010
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