...yeah...THIS!
...for reasons other than CH i've had multiple scans of various kinds.....nearly every one shows "something" that draws comments re potential causes. it's radiologist CYA and always scared the spit out of me until i came across a urologist who bemoaned that....and another physician who said "we ALL have "anomalies" ...you are more likely to die with than from....a scan in and of itself is rarely determinative of anything".
...do your research, i did, but use it to ask questions rather than come to scary conclusions...
...fwiw...and this is a personal observation based on years of being in the clusterhead community. there are conditions that mimic CH symptoms...and which makes a diagnostic scan worthwhile, but, i've never seen any lit that describes CH being a causative factor in scan anomalies...