Healthy Clinical Trial
Official title:
Effect of X-Ray Computed Tomography Examination on the Blood Reactive Oxygen Species Level in Apparently Healthy Adults
The clinically widely used X-ray computed tomography examination has a low-grade radiation
effect and recently has attracted much attention concerning the possible adverse effects of
radiation on human body [ref. 1-5]. The radiation is harmful to human tissues and cells
mainly because it can interact with water (which makes up to 80% of cells) to generate
reactive oxygen species (ROS), especially the formation of hydroxyl radicals. So far as we
can reach, there is no report concerning the relation between X-ray computed tomography
examination and the blood ROS concentration. Therefore, we wish to conduct this study to
clarify if the routinely applied X-ray computed tomography examination may induce a higher
concentration of ROS in the peripheral blood.
Study subjects will be participants of health check program at our hospital. The only
enrollment condition will be a scheduled X-ray computed tomography examination for either
lung (20 cases) or heart (20 cases) of the study subject. Another 20 participants receiving
health check program without X-ray computed tomography examination will be included as the
control group. The formal consent will be delivered to the participants of health check
program several days before their admission for health check and will be retrieved before
the proceeding of health check.
Measurements and comparison of ROS concentration will be performed in the sampled peripheral
blood before and after the performance of X-ray computed tomography examination during a
regular health check program. Totally 120 blood samples will be collected from included 60
study subjects within 3 months. Reactive oxygen species（ROS）levels will be measured by a
chemiluminescence (CL) analysing system (CLD-110, Tohoku Electronic Industrial, Sendai,
Japan).
n/a
Observational Model: Case Control, Time Perspective: Prospective
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