This book explains in basic terms the step by step process of commissioning the Analytical Aniostropic Algorithm with a 2100CD linac 6MV Energy Photon.Before a new calculation algorithm in a Treatment Planning System can be utilized clinically, a comprehensive Commissioning process and evaluation is necessary.This is because accuracy of the dose calculated is very important for the quality and reliability of radiotherapy planning and delivery.This book further goes on to discuss the comparison with the Pencil Beam Algorithm after the commissioning process with a breast and lung clinical cases.This book will be very useful to Medical Physics Students, Residents, Clinical Medical Physicists and Teachers.