The analysis of sister chromatid exchanges (SCEs) has been long proven to be a very sensitive test in detecting certain types of DNA damages, and is particularly useful for testing external influences on chromosomes such as ultraviolet rays and mutagenic chemicals. In the presence of such influences, sister chromatid exchanges in the different phases of the cell cycle will increase compared to that of controls. Experiments to date have not demonstrated any such increases in the presence of ultrasound insonation.