Compliance to radiography practice of high-kilovoltage technique for chest radiography in South South Nigeria

Abstract

BackgroundThe production of a good quality chest radiograph depends on the selection of appropriate kilovoltage and current–time product while keeping the radiation dose to patients as low as possible. This study assessed radiographers’ level of compliance to the use of high kV as standard for postero-anterior (PA) chest X-ray in the South South region of Nigeria.ResultsSeventy-seven of the 82 questionnaires administered were completely filled and returned giving a response rate of 94%. Of these 77 respondents, only 74% (n = 57) were aware of high-kV technique as the recommended procedure for PA chest X-ray. Departmental protocols (technique chart with exposure factors) were also non-existent in all hospitals/diagnostic centres used in this study. Thirty-one respondents were males (40%); 44% (n = 34) working in public hospitals only and 32% (n = 25) with less than five years of working experience were aware of this technique. On the benefits, more than 50% of the respondents were familiar with the benefits of using high-kV technique as the recommended standard for PA chest X-rays. Responses on the benefits of the technique varied from 77% (n = 59) for patient dose reduction to 51% (n = 39) for better imaging of the airways. The use of high-kV technique for PA chest X-rays showed only 13% compliance. Factors influencing compliance included imaging system (film screen /digital), X-ray tube rating and X-ray unit with preset/manual exposure factors (p < 0.05).ConclusionsThe present study revealed low compliance to high-kV technique in this region, suggesting a potential increase in ionizing radiation dose to patients during chest radiography, hence the need to improve adherence to the recommended standard.