Figure 4.

The radiation positioning system (RADPOS) position measurements for one patient in the study by Cherpak et al⁴⁶ taken after completed implantation. Black squares represent the time of the initial and final metal-oxide-semiconductor-field-effect-transistor readings taken for the first measurement period [with transrectal ultrasound (TRUS) probe in place] and the second measurement period (after the TRUS probe was removed). The change in position from the removal of the probe can be seen in all coordinates at approximately t = 4100 s. Reproduced from Cherpak et al⁴⁶ with permission from Elsevier.