Quantitative Evaluation of the Use of Surface Filter to Reduce Photon Starvation Artifacts

During CT (Computed Tomography) examination, Surface Filter made for the reduction of Photon Starvation Artifacts occurring in the patient's shoulder and clavicle was quantitatively evaluated. Image quality was evaluated by changing 120 kVp and 100 mA, 200 mA, and 300 mA fixed to Thorax Phantom, and scattered radiation measurement was performed on the surface of the part to which the filter was applied. As a result, it was confirmed that the SNR(Signal to Noise Ratio) increased by 35.86%, 26.65%, and 18.18%, respectively, and the effect of reducing the thoracic surface dose by an average of 33.7% was shown. The results of this study indicate that it is a useful method that can optimize the image without increasing the dose and reduce the patient's surface dose due to scattered radiation.