Add segmentation of clinical images as an example in introduction

Author: uschille

episodes/01-introduction.md

@@ -50,6 +50,7 @@ Some examples of image processing methods applied in research include:
 - [imaging a Black Hole](https://iopscience.iop.org/article/10.3847/2041-8213/ab0e85)
 - [estimating the population of Emperor Penguins](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3325796/)
 - [the global-scale analysis of marine plankton diversity](https://www.cell.com/cell/fulltext/S0092-8674(19)31124-9)
+- [segmentation of liver and vessels from CT images](https://doi.org/10.1016/j.cmpb.2017.12.008)
 
 With this lesson,
 we aim to provide a thorough grounding in the fundamental concepts and skills