Evaluation of On-Couch CBCT Image Quality

Inclusion Criteria

• •Patient age is ≥ 18 years old.
• •Patient has a diagnosis of primary or metastatic cancer, including but not limited to tumors arising from or involving the head/neck, lungs, liver, pancreas, prostate, urinary bladder, rectum, cervix or uterus.
• •A previous (standard-of-care) decision was made to treat the patient with radiation therapy using a Varian TrueBeam treatment system.
• •A previous (standard-of-care) decision was made to treat the patient with a radiation dose of at least 20 Gy in at least 5 fractions, one fraction per day on consecutive days, Monday to Friday.
• •Patient is willing and able to provide informed consent to participate in the study.