 Ultrasound guidance demonstrated that these needles, numbering approximately 14 to 15 needles, were well placed and spaced throughout the prostate to obtain excellent freezing of the entire gland while sparing the urethra. 
Ultrasound guidance demonstrated that these needles , numbering approximately 14 to 15 needles , were well placed and spaced throughout the prostate to obtain excellent freezing of the entire gland while sparing the urethra .