Fig.2 Iceball formation at the tip of a cryoprobe
Fig.5 MR monitoring of frozen area in the uterus
a : Four cryoprobes are placed in uterine fibroid
b, c, d : Ice ball grows in uterine fibroid. Frozen area is clearly visible on MR images as a very low signal area, and contrast between frozen and non-frozen tissue is very high. Because ice ball grows slowly, interval of monitoring was every 30 sec. or one min.