Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Needle insertion route impeded by skeletal structures and close to blood vessels which have high risks of puncture bleeding;
Poor organ function (e.g. poorly controlled high blood pressure);
Poor compliance, unable to complete coordination;
Participant who is considered inappropriate or unwilling to participate in this clinical trial for other reasons.

The Optimal Number of Fiducial Marker for Stereotactic Body Radiotherapy