On the measurement of low-voltage therapeutic X-ray units.
Skin exposure rate was measured on 22 low-voltage therapeutic X-ray generators at an FSD of 15 cm at each of four standard kV steps. The measurements of two consecutive years were compared and their variance was analyzed. The statistical fluctuation of these field measurements due to the ionization method was 2.58%. According to the present measurements the high inaccuracies of low-voltage X-ray therapy are mainly due to the lack of reproducibility of the X-ray generators and an insufficient calibration of the dosemeters.
D000704:Analysis of Variance; D006801:Humans; D008722:Methods; D011879:Radiotherapy Dosage; D012867:Skin / Q000528:radiation effects; D013997:Time Factors; D014986:Xeroradiography