The present invention provides a image system applied to brain image, includes a first image device, a second image device, a third image and a CPU. The first image device used to capture a first brain image and calculate a cerebral blood flow, a cerebral blood volume, a cerebral blood mean transit time and a first contrast agent time to peak according to a first concentration curve. The second image device used to capture a second brain image and calculate the cerebral blood flow, the cerebral blood volume, the cerebral blood mean transit time and a second contrast agent time to peak according to a second concentration curve. The third image device used to calculate a cerebral cortex volume. The CPU generates a cerebral vessel block region image according to the vessel block region of the first brain image and the vessel block region of the second brain image by algorithm. The third image device generates a brain atrophy region according to the cerebral cortex volume.本發明提供一種應用於腦部造影的顯影系統，包括第一顯影裝置、第二顯影裝置、第三顯影裝置及中央處理器。第一顯影裝置用於擷取第一腦部造影影像和根據第一濃度曲線來計算腦血流流速、腦血流體積、腦血流平均通過時間及第一顯影劑高峰時間。第二顯影裝置用於擷取第二腦部造影影像和根據第二濃度曲線來計算腦血流流速、腦血流體積、腦血流平均通過時間及第二顯影劑高峰時間。第三顯影裝置用於計算腦部皮質體積。中央處理器根據第一腦部造影影像的血管阻塞區域及第二腦部造影影像的血管阻塞區域經由演算法產生腦部血管阻塞區域影像。第三顯影裝置根據腦部皮質體積產生大腦萎縮區域。
