Assertion: leaf collimator | /r/AtLocation | widespread use
Facets:
value: in medical linacs
type: LOCATION
Source sentences:
text: Multi-leaf collimators (MLCs) which are now in widespread use in medical linacs consist of two collimator banks of thin tungsten 'leaves' with each bank consisting of 40 to 80 leaves (so a total of 80 to 160 leaves).