Analogous to the "don't project slides for months on end" - I would not stick it on the radiation source and leave it there for months, but it's not an amount y

Analogous to the "don't project slides for months on end" - I would not stick it on the radiation source and leave it there for months, but it's not an amount you need to worry about for a reasonable number of trips (let's say less than 100) through the scanner.