The aim is to understand the status and development of individual monitoring for internal exposure of workers.

Objective To study and compare the HPRT gene mutation in rat soma cells induced by internal exposure to radionuclides using cloning method.

The instrument is most advanced internal exposure monitoring system of radionuclide kind, precipitation location and radiation activity in vivo, and can be used to monitor radiation for the staff of nuclear accident and normal operator of nuclear irradiation.

Comparison and application of variance-reduction techniques used in internal radiation dose calculations for small organs;

From the accumulation of these elements in brain, eyes, testes and skeleton, the biological effects of low dosage RE for long attract and internal radiation of natural radioactivity in the RE were investigated.

Using it,we develop a software by Monte Carlo to calculate the internal radiation dose.

DNA Damage Induced by Radionuclide Internal Irradiation.;

Systematic and comprehensive understanding isachieved in many aspects like the protection emphasis on tritium gas contactors, the mostpreferable measurement for the protection of tritium gas internal irradistion toxicity, the particular law of tritium gas internal irradiation dosage monitoring, and the principal involvedorgans of tritium-induced non-random radiative effects, etc.

Methods Every MTS was placed in every hole of 96 holes plate, in the same time after 24 hours of internal irradiation with 15 Gy of Na 2H 32PO 4 was done, another group of MTS were received 15 Gy of 6 MV external irradiation produced by liner accelerator, with the radiation rate 2 Gy/mi.

Objective To investigate the safety, acceptance and the effective extent of 192Ir-internal irradiation, providing theoretical guidelines for HC.

Objective To observe the effect of applying humanism concern in patients who receive I131 internal radiation therapy and are isolated.