Patients' perception of symptoms, quality of life, and urinary symptoms are assessed periodically by the International Prostate Symptom Score (I-PSS). Patients' satisfaction with the bladder-filling instructions (i.e., ability to comply with the bladder-filling protocol, the number of incidents of wetting accidents, number of incidents of having to repeat the water drinking on the same day due to machine breakdown or the patient's inability to retain the full bladder for the required amount of time, and the level of frustration) is assessed periodically by the Visual Analogue Scale (VAS).