KILO VOLTAGE MEASUREMENT OF X-RAY TUBE USING ALUMINIUM STEP-WEDGE

Yogesh Kumar, Arun Singh Oinam and Abhishek Soni*

ABSTRACT

The X-ray beam quality is expressed as kilovoltage. There are various methods for calibration of kilovoltage indicators including direct methods and indirect methods. But none is completely satisfactory. Tube potential produces both maximum energy in the photon beam and contributes to proportion of high energy photons also. Filter reduces the proportion of low energy photon and contributes to image on the film. In the present study, kilovoltage was determined by optical density produced on the exposed film and aluminium step wedge of varying thickness was used in the process. This method was easy, economical and efficient in all set ups. This was very reliable method for measurement of the kilo-voltage without using any major equipment. This gives the exact output and is more reliable when compared with the other methods.

Keywords: Kilovoltage, X-ray, optical density, wedge.