ray is  used whilst performing the biopsy. Both times, neither she nor  anyone around are wearing protective lead garments against radiation  exposure, which is a standard practice in any medical establishment.  In addition, an endomyocardial biopsy, as it is called, is not  preformed in a medical office as shown in the movie. It is performed  in a cardiac cath lab, which is effectively, an operating room. All  personnel are in scrubs and a sterile field is required. Lead is  worn underneath  the surgical gowns. From an outside perspective, it may not be  readily apparent that the staff in a cath lab are wearing lead IF  they are wearing surgical gowns appropriately.