Manual segmentation can be very time-consuming when working with complex data in 2D or 3D. Simpleware software has a full suite of medical image segmentation tools which have been developed with our customers to quickly generate good quality models.
Using a combination of these tools allows you to generate at least the basis for a good model. For example, considering heart CT, we can use the Threshold tool to select a range of greyscales that include the sections of the heart required, followed by a Mask Flood Fill to remove any disconnected regions. If there are still areas which are connected which need to be removed or just separated in another mask, the Split Regions tool can be used.