The images are as follows:
a & b: axial contrast-enhanced CT images from the upper abdomen
c & d: diffusion weight sequence (b=800) in same slice position as a & b
e & f: apparent diffusion coefficient (ADC) map of slices c & d
Which imaging signs can you see on these images and what do they mean? Why is this person vomiting?
In this case, the CT and structural MR images told us that there was widespread metastatic peritoneal disease - I am showing you the diffusion images to illustrate how well the sequence can pick up malignant tissue, and has the potential to track response to treatment by looking for changes in the ADC value.
My other #xrayoftheweek case involving diffusion weighted imaging can all be found here, and an introduction to the technique and an explanation of the image below can be found here.