Figure 4.

An example of iceball shape adaptation at 6 min of the first freeze (only one slice of the 3D volume is displayed). a: detected probes in the baseline scan (the case has three probes but only two are shown in this slice). b: Initially modeled iceball shape. c: Iceball shape after thinning. d: Iceball shape after growing, the binary image used to generate shape prior. e: Final segmentation using our method. Note that b–d were internal steps of the shape adaptation process but not the segmentation results. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]