as with everything in the world of "sonar" and "radar" it has most to do with what reflects back . less profile equals less reflection ,more profile equals more reflection .
whatever the direction of the original pulse the image that reflects back is the side facing the sending unit .
dad was a radar tech. in the navy and to be sure the principals remain the same as he taught me .
adjusting your individual unit is likely the best way to fine tune your images and most of the time a larger bait will send back a better image ,as long as the target is solid it will reflect back , Sonogram is still just high end sonar and live scope is still just a Sonogram from what my feeble mind can get out of this technology