FIG. 3.

No dicentric chromosomes were found in cell preparations before computerized tomography (CT), 4.5% of cells contained dicentric chromosomes 48 h after computerized tomography, 2% dicentric chromosomes were detected 96 h post-computerized tomography, and none were detected at 336 h. No reduction in the total lymphocyte count occurred during this period. Solid diamonds, observed rate of disappearance of dicentric chromosomes for patient TAN. Open squares, rate of disappearance of dicentric chromosomes following radiotherapy for ankylosing spondylitis (15). The lymphocyte half-life is about 200 days.