非線形関数処理によるヒストグラム変換を用いた低コントラスト血管造影画像の画質改善について

概要

論文の詳細を見る
Digital subtraction angiography (DSA) is a method for increasing a contrast of blood vessels by injecting a contrast medium into the blood vessels. Iodine contrast media are widely used for the DSA study, but might cause a sever side effect for the patients having iodine contraindication disease. In the previous report, we introduced gadolinium contrast medium into the DSA study. Although the contrast of the images with gadolinium contrast medium was slightly decreased compared to that with iodine contrast medium, the image quality was well acceptable for diagnostic procedures without causing any side effect. In this report, we proposed a novel image processing algorithm to improve the image quality of DSA adjusting to contrast media. The image processing algorithm consisted of smoothing, thresholding, and histogram transformation, and signal-to-noise ratio (SNR) was further improved utilizing median filtering process. In conclusion, our novel method using gadolinium contrast medium in the DSA study showed enough image quality and may be useful for diagnosis process.
前橋工科大学の論文
2003-03-27