Study of Breath-holding as a Means to Reduce Tumor Motion From Breathing

Feasibility Study for Gated External-Beam Radiotherapy for Patients With Internal, Extra-cranial Tumors

The purpose of this research study is to evaluate typical tumor motion caused by breathing using MRI and can help determine whether simple passive breathing and/or breath-holding could be used for the future treatment of similar lung and liver tumors using radiation therapy radiosurgery techniques.

Inclusion Criteria:

• The patient is enrolled on U8700 RSRB # A Phase II Study For Using Radiosurgery On Limited Metastases Of Breast Cancer or U9700 A Pilot Study For Using Radiosurgery On Limited Metastases.
• ≥ 18 years of age
• has given Informed consent

Exclusion Criteria:

-Contraindications for any MRI procedure