This is not a knock on anyone. It is simply how expertise works.
A radiologist who spends most of their week on general studies is excellent at general studies. A brain and spine subspecialist sees the same image differently, because the pattern that looks unremarkable to a broad eye is the pattern a focused eye has been trained to distrust.
The subtle bleed. The tract that runs off normal. The asymmetry that only means something once you know what symmetry should look like.
When the study is neurological and the stakes are high, the reader's depth in that exact area is not a nice to have. It is the difference between a report and an answer.
Match the study to the subspecialist. Every time it counts.