MLCs are integrated into the linear accelerators (LINACs) used in radiation therapy. By adjusting the position of the individual leaves, the MLC can shape the radiation beam to conform to the three-dimensional shape of the tumor. This is particularly useful in techniques such as intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT), where the goal is to deliver a high dose of radiation to the tumor while minimizing exposure to healthy tissues.