Medical, radiotherapy source vial

摘要

A catheter apparatus and radiation dosimetry unit indicator for delivery of a prescribed radiation dose to a patient. A radiotherapy source vial (700) includes a fluid container (701) of radioactive fluid with a seal (702,731) disposed about the container. Seal (702,731) is moveable with respect to container (701) to change the contained volume therein. A radioactive fluid transport site (703) is in communication with the contained volume and with an exterior (726) of the container (701), and may include a septum (707) or a valve (711). An engagement mechanism (704) is connectable to an external control mechanism (706) whereby the contained volume in the radioactive fluid container can be decreased and increased by actuation of the external control mechanism.