Abstract:
The chest radiograph has been remain as one of the most commonly
performed examination, with considerable repetition
among many
clinics in Sudan (Khartoum).
Such undesirable repetition, could be due to lack of using optimum
exposure factors with less account on awareness of technique or
anatomy, however the exposure factors are the crucial one.
The selection of these factors (kv & mAs) mostly depends on the
experience of the technologist and sometimes on
theoretical basis
which might not gives a satisfactory result.
The researcher studied and evaluates the factor that affects the
exposure factor selection, to develop an empirical system that gives
the optimum exposure factors and tested the accuracy and the
reliability of the developed system.
The study consisted of 64 patients examined by PA chest X-ray that
selected randomly. The collected data includes: chest thickness,
body mass index(BMI), age and height. The collected data then
correlated with the kv and mAs that used to produced chest x-ray in
an attempt to find the variable with the highest correlation
coefficient. The result showed that the body mass index and the
patient weight were well correlated with the Kv and MAs
respectively. The result also showed that there is no significant
IX
different at p = 0.05 between the exposure factors (Kv and mAs) that
used to acquired the chest X-ray and the estimated one from the
linear association between the (BMI, weight) and (kv, mAs) using
paired t-test with p = 0.99 and 0.669 and t = 0.013 and 0.43
respectively.
