Background : In our center, clinical trial with ³²P began in June 2001. This new medical treatment method is expected to be a promising cure with few side effects. To establish the validity of a new treatment method, it is necessary to evaluate the efficacy of treatment and secure the safety of interventional cardiologists. This study evaluates the exposure dose of the interventional cardiologists during intracoronary radio-therapy with ³²P (5.5 GBq) .
Method : We measured the amount of beta ray irradiation using a rate of H' (0.07, 0°), detained in the centering catheter. Then, we measured braking radiation dose using H' (10, 0°) of ³²P, with the original phantom.
Results : Exposure dose of interventional cardiologists during this new treatment was 2.0 μSv/procedure as an effective dose. The radiation dose at the intracoronary radiotherapy is relatively less compared with conventional X-ray medical radiation techniques. However, the interventional cardiologist is exposed mainly when a radioactive source is outside of a patient [H' (10, 0°) : 1.0 μSv and H' (0.07, 0°) : 100μSv] .
Conclusion : They should take a distance from a source or protect beta ray during the transit of ³²P from SDU (source delivery unit) to patient and return to SDU after therapy.