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Comparison of voltage‐divider, modified Ardran–Crooks cassette, and Ge(Li) spectrometer methods to determine the peak kilovoltage (kVp) of diagnostic x‐ray units
Author(s) -
Giarratano Joseph C.,
Waggener Robert G.,
Hevezi James M.,
Shalek Robert J.
Publication year - 1976
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594280
Subject(s) - spectrometer , oscilloscope , voltage divider , voltage , waveform , amplifier , materials science , optics , spectrum analyzer , detector , nuclear medicine , physics , optoelectronics , cmos , quantum mechanics , medicine
This report describes several different techniques that have been used to determine the peak kilovoltage (kVp) of single‐ and three‐phase diagnostic x‐ray units operating in both the radiographic and fluoroscopic mode, from 60 to 110 kVp, using (1) a voltage divider with oscilloscope display; (2) a voltage divider and special summing amplifier with digital display of the voltage utilizing a multichannel analyzer; (3) a version of the Ardran–Crooks cassette technique; and (4) a Ge(Li) spectrometer method. Each technique presents a distinct advantage: Method (1) enables the waveform to be viewed directly; method (2) is probably the most accurate and reproducible technique; method (3) has the greatest ease of operation; and method (4) provides the ability to visualize the x‐ray spectrum.