Comparison of f-factors derived from HVL and x-ray spectrum measurements for a superficial therapy x-ray unit

L. Levy, R. Waggener, D. McDavid, P. Zanca

Research output: Contribution to journalArticle


HVL measurements were made on a superficial therapy X-ray unit at 100 kVp for 0-3 mm Al added filter with a transit dosemeter to obtain good geometry conditions. From a plot of f factors versus HVL, the corresponding roentgen to rad conversion factors, f, were obtained for each added filter combination. X-ray spectra for each of the filter combinations were measured with a NaI(Tl) spectrometer system. The observed spectra were corrected for spectrometer introduced distortions using a matrix equation and a digital computer.

Original languageEnglish (US)
Article number066
Number of pages1
JournalPhysics in Medicine and Biology
Issue number6
Publication statusPublished - Dec 1 1972


ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

Cite this