Application of anode heel effect (AHE) with stepwedge and variation of x-ray tube voltage to contrast to noise ratio (CNR) in computed radiography (CR)

Abstract

A study has been carried out on the application of anode heel effect (AHE) with stepwedge to variations in X-ray tube voltage on contrast to noise ratio (CNR) on computed radiography (CR) images. Stepwedge used with 21 steps with the addition of a thickness of 1.5 mm each step. X-ray tube voltage variations are 40kV, 50 kV, 60 kV, 70 kV, 80 kV, and 90 kV. Analysis of the variation of the X-ray tube voltage on the CNR value was determined using IMB SPSS Statistics 26 with a simple regression test. The results of these tests indicate that the variation of the X-ray tube voltage affects the CNR value, where the greater the variation of the X-ray tube voltage, the lower the CNR value. The CNR value at a thickness of 27.0 mm is the optimal CNR value of 71.113