Can I Measure Muscle Thickness Changes?

I'm not aware of any studies where they've specifically looked at, say, the pectoral muscle and trained one group with just chest presses or something like that. But surely it is quite simple to to measure muscle thickness change, albeit there is, oversly a little bit of measurement error there. And i may be arriving at the conclusion that both methods work about the same, and there's no real significant advantage to doing multiple sets over single sets. I mean, i don't know how valuable it be to do where you am, or useful it would be to do, i you know, a big kind of preexhaust studyand  maybe it's already been done,.