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)

Ni Nyoman Ratini; I Made Yuliara; Winardi Tjahyo Baskoro

doi:10.53730/ijhs.v7n3.14645

Authors

Ni Nyoman Ratini
nymratini@unud.ac.id
Udayana University, Denpasar, Indonesia
I Made Yuliara Udayana University, Denpasar, Indonesia
Winardi Tjahyo Baskoro Udayana University, Denpasar, Indonesia

Keywords:

AHE, CNR, computed radiography (CR), stepwedge, X-ray tube voltage

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

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