Hi Zivadin,looks to me like you have crystal drop out on your probe causing this shadowing(or as i call it noise scatter). This is caused by poor output from the crystals on one side of probe. This has probably been caused by the probe being dropped or possibily that an amount of the small wires just below the transducer head in the cable are breaking down. Does the problem look worse when you press your finger hard over the probe, or move the cable below the transducer head. If so your problem is the transducer. If you have another system you can try swopping the probes then this should prove the transducer is your problem.
I hope this helps
