42. 4-D CT Data Acquisition
Prospective Gating Retrospective Gating
42
43. 43
images are collected only at one
phase of the respiratory cycle
Or Registration of the CT images
After Data of Respiratory Phases the have been acquired
1, Prospective Gating
scan data are
acquired at all
phases of
respiration and the
correlation
44. 2. Retrospective Gating
44
the beam on
only at the
selected times of
respiration
Including
both
Inspiration
and
Expiration
62. REFERENCE
Treatment Planning in Radiation Oncology by F M Khan
Physics of RadiationTherapy (4th Edition ) by F M Khan
Overview of Image-Guided RadiationTherapy by Lei xing,
Ph.D,BrianThorndyke, Ph.D ,University of Stanford
IMRT, IGRT, SBRT – Advances in theTreatment Planning
and Delivery of Radiotherapy by John L. Meyer
62