To the Editor.
—In their discussion in the Archives of breast cancer (139:452-455, 1979) Drs Presant and Van Amburg used rather outdated figures for the radiation dose from mammography. They stated that the radiation dose per breast examination is 1.5 to 6.0 rads, depending on the technique.However, recent modifications of both xeroradiographic and film techniques resulting in lower dosages are now widely used. In May 1977, Wolfe,1 who has been one of the main developers of xeromammography, refuted the figures of Bailar2 (cited by Drs Presant and Van Amburg) with evidence that modern xeroradiography entails a dose of less than 1 rad to the middle portion of the breast. More recently, with negative mode xeromammography, Frankl and Ackerman3 found the midbreast dosage to be 0.22 rad with the standard two views.The newer films that have been developed since 1973 entail lower dosage than does xeromammography