diff --git a/introduction.tex b/introduction.tex
index 1597668..532ba3f 100644
--- a/introduction.tex
+++ b/introduction.tex
@@ -101,7 +101,7 @@ manageable pieces.
   \centering
   \includegraphics[width=\textwidth]{figures/net_intro}
 \caption{
-Overview of our network based on Mask R-CNN. For each RoI, we predict the instance motion
+Overview of our network based on Mask R-CNN. For each region of interest (RoI), we predict the instance motion
 in parallel to the class, bounding box and mask. Additionally, we branch off a
 small network for predicting the camera motion from the bottleneck.
 }