Stable and unstable chromosome aberrations measured after occupational exposure to ionizing radiation and ultrasound.

Aim: To evaluate chromosome aberration and fluorescent in situ hybridization (FISH) assays as a method to estimate of health risk, we monitored 9 male subjects occupationally exposed to low doses of both ionizing radiation and ultrasound during a period of over 3 years.

Methods: Sampling was performed at 6-month intervals during a three-year period. First we used conventional chromosomal aberrations analysis.