Editing Monitor unit (section)

A '''monitor unit''' ('''MU''') is a measure of machine output from a clinical accelerator for [[radiation therapy]] such as a [[linear accelerator]] or an [[orthovoltage]] unit. Monitor units are measured by monitor chambers, which are [[ionization chamber]]s that measure the [[radiation dose|dose]] delivered by a beam and are built into the treatment head of radiotherapy linear accelerators.<ref>{{cite book|last1=Halperin|first1=Edward C.|last2=Perez|first2=Carlos A.|last3=Brady|first3=Luther W.|title=Perez and Brady's principles and practice of radiation oncology|date=2008|publisher=Lippincott Williams & Wilkins|location=Philadelphia|isbn=9780781763691|page=152|edition=5th}}</ref>