Fig. 6
From: Experimental study of beam distortion due to fiducial markers during salvage HIFU in the prostate
Change in the lesion volume as a function of the offset between the focal position and the marker, when the focal position is translated along the left-right (x) axis for a fixed position in the anteroposterior axis. The results are grouped for (a) the transducer focus positioned from 5 mm in front of the marker to 4 mm behind it (average of 10 measurements), and (b) the transducer focus positioned from 5 mm to 10 mm behind the marker (average of 6 measurements). The error bars show the standard deviation based on the grouped measurement results