I was slated to take a "nuclear stress test" with cardiolite (Technetium Tc99m Sestamibi) but grew concerned when they recommened not holding a small child for 24 hours. I wonder (a) whether this substance can affect males who are trying to father a child (i.e., any relationship to birth defects, etc.) and (b) are there any risks of being near a small child after the test (i..e, can I go near my 1 year old son)? Thanks!