The X-ray machines used for radio-diagnostics are required to meet certain quality assurance (QA) measure. For the exposure of patient in diagnostics radiology, individual dose limit does not apply, but justification and optimization of radiological protection do. This paper reports radiological checks carried out in five hospitals in Zaria, Kaduna State, Nigeria. The radiological kVp accuracy, reproducibility and consistence checks on the X-ray machines were assessed. The Quality Control (QC) parameters were evaluated using quality control kitto check the optimal exposure conditions at the five hospitals. The assessment showed that, some of the X-ray machines are over aged and others need adjustment corrections for good radiographs so as not to have rejects that may lead to unnecessary and unwanted exposure. The reported methods can easily be implemented in any clinical situations where kVp accuracy, reproducibility and consistence optimisation check assessment in radiography is necessary. From the study, varying levels of adherence to guidelines were evident with no hospitals demonstrating complete compliance to(NNRA) standard guidelines that is needed to check possible over exposure of patients.
