Inclusion Criteria:

1. Patients who are planning to receive external beam radiation of prostate

2. Patients who are to be implanted with Beacon Transponders in the prostate

3. 18 years of age or older.

4. Histologically confirmed diagnosis of prostate cancer.

5. Ability to comply with study visit schedule.

6. Signed informed consent form.

Exclusion Criteria:

1. Any patients who have received other investigational therapy within the last 60 days
are excluded.

2. Individuals that have previously been implanted with permanent Beacon transponders
are excluded.

3. Patients that have any prosthetic implants in the pelvic region that contain metal or
conductive materials (e.g., an artificial hip).

4. Any other medical or other condition that would, at the discretion of the
investigator, preclude the individual from participation in a clinical study.