Figure 14From: 3D multimodal cardiac data reconstruction using angiography and computerized tomographic angiography registrationAorta segmentation in initial slices. (a) A selected slice from the initial CTA slices. (b) Extraction of region 4 based on Hounsfield Unit (HU) measurement and also pre-processing steps for removing small objects. (c) The result of aorta segmentation by applying Hough circle transform and performing some post-processing steps.Back to article page