パワースペクトル積分値を用いた硫酸バリウム造影剤付着度の客観的評価

抄録

Although many investigators have visually assessed the performance of barium contrast media, there has been no objective analysis of barium contrast media adhesion. We hypothesized that spectrum analysis may be useful for the objective evaluation of adhesion, because it has been shown to be useful in medical image analysis and diagnosis in other fields. We found a relationship between the power spectrum component of X-ray images and fluctuations in the concentration of barium contrast media. Therefore, we applied the "Power Spectrum Integral Value" to evaluate adhesion. We determined the power spectrum of X-ray images with fluctuating patterns caused by barium contrast media by using a commercially available personal computer and an image scanner, and determined the adhesion curve using the power spectrum integral. Our results showed a good correlation between the adhesion curve determined by visual evaluation and the curve determined by our method. In conclusion, spectrum analysis makes it possible to evaluate the adhesion of barium contrast media quickly and objectively. We believe that it also may be useful in comparing the performance of several barium contrast media and in providing other relevant information.