加法区域 ROI 绘图工具是面积被定义为 "感兴趣 "的几何图形。
减法区域 ROI 制图工具是面积被定义为 "非感兴趣 "的几何图形。
结果区域由所有定义的加法区域和减法区域产生；执行顺序请参阅ROI 工具的应用顺序。
添加新的 ROI 绘图工具
可以在新绘图工具下拉菜单
中选择要添加的绘图工具。从菜单中选择该工具即可将其添加到图像中。
本节主题：
Additive area ROI drawing tools are geometric shapes whose area is defined as "of interest".
The subtractive area ROI drawing tools are geometric shapes whose area is defined as "not of interest".
The resulting area results from all defined additive and subtractive areas; for the execution order, see Order of application for ROI tools.
Adding a new ROI drawing tool
The drawing tool to be added can be selected in the drop-down menu for new drawing tools . The tool is added to the image by selecting it from the menu.
Topics in this section:
•Circle or ellipses ROI drawing tool