O desenvolvimento do Protocolo de Controle da Qualidade para Fluoroscopia

Abstract

The general objective of this work was to develop constancy tests that will form part of an institutional protocol for conventional fluoroscopy. The specific objectives included the creation of tests that assess the functioning of the X-ray tube, image quality and dosimetry during image acquisitions. The methodology was structured into three main groups of tests: the first focused on assessing the operation of the X-ray tube, the second on analyzing image quality, and the third on dosimetry and automatic intensity control (AIC) compensation. The Nomex PTW dosimetric multimeter was used for the tests related to tube operation and dosimetry, while the NORMI 4 FLU PTW test object was used to assess image quality, covering contrast, brightness, resolution, distortion and noise. The results showed that the equipment remained within the limits established by Normative Instruction No. 91 and followed the manufacturers' guidelines, with the image quality tests showing satisfactory performance for future reference. During the tests, no malfunctions were identified in the equipment, nor were any factors identified that would hinder the proposed methodologies. Based on these results, it was possible to draw up a constancy test protocol for conventional fluoroscopy, which will be applied in inspections carried out by the Radiological Sciences Laboratory (LCR).