Spatial resolution test on abdomen examination of X-ray tube performance

In the field of health, good and quality services are the main things that must be considered. One of the efforts to achieve this is to test the suitability of the diagnostic radiology X-ray machine by testing the spatial resolution. This study focuses on testing the spatial resolution of X-ray images at the Ahmad Yani Islamic Hospital in Surabaya. This is done to obtain optimal image quality and determine the performance of the X-ray tube. First, the PCB design was carried out according to the TOR 18FG acrylic phantom drawing. Furthermore, exposure to X-ray radiation was carried out on the TOR 18FG and PCB with voltages of 55 kV, 65 kV, and 70 kV. The current and time used are the same, namely 8 mAs. In this study, the results of the reconstruction of the X-ray machine on the QC Tool were obtained in the form of TOR 18FG and PCB. The results of the X-ray reconstruction are in the form of a DICOM (Digital Imaging and Communications in Medicine) file. DICOM files must be opened using ImageJ software for plotting. Then, an analysis of the FWHM (Full Width Half Medium) value was carried out using the OriginPro software using gaussian fittings. After obtaining the FWHM value, the spatial resolution value can be calculated. Based on the analysis that has been carried out, the value of the spatial resolution on the PCB has increased from a voltage of 55 kV to 65 kV. However, the value of the spatial resolution on the PCB has decreased from 65 kV to 70 kV. In addition, X-ray tube performance is also seen from the SNR and CNR values. The SNR value on the TOR 18FG and PCB increases as the voltage is exposed.