A system and method for providing freehand render start line drawing tools and automatic render preset selections is provided. The method includes receiving a render start line drawn in freehand via a user input device on a 2D image of a profile of a structure of interest. The method includes analyzing pixel intensity values in a region of the render start line. The method includes automatically selecting one of a plurality of sets of render mode presets based on the pixel intensity values in the region of the render start line. Each of the plurality of sets of render mode presets is associated with a different rendering mode. Each of the rendering modes is associated with a different pixel intensity value range. The method includes generating a volume rendering according to the automatically selected set of render mode presets. The method includes presenting the volume rendering at a display system.
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