什麼是 noise?

在醫學影像上，noise是醫學影像的特性之ㄧ。不同的造影技術就會有其自身特殊的noise。一般來講，所謂的noise就是影像上有汙點、紋理、粒狀的出現。

參考來源：

"Another characteristic of all medical images is image noise. Image noise, sometimes referred to as image mottle, gives an image a textured or grainy appearance."
- Image Characteristics and Quality (在「Google 網頁註解」中檢視)