Application of lead screen in PET-enhanced CT scanning and radiation analysis on operator

Abstract

Objective To analyze the dose and the duration that medical staff can take during operation with or without lead screen protection in PET-enhanced CT and to evaluate the practical application value of lead screen on radioprotection. Methods According to a certain set of conditions, 40 patients were selected, and randomly and equally divided into experimental group (with lead screen protection) and control group (without lead screen protection) . A personal meter was used to measure personal radiation rate and cumulative dose equivalent. The time required for the operator was recorded. The analysis of these statistics adopted t-text by SPSS17.0 and conclusion on the radiation dose and operation convenience was drawn. Results The average dose equivalent rate and the median dose equivalent rate of the operator group was remarkably less than that of the control group (t=3.390, 3.392, both P<0.05) . On the average cumulative dose equivalent and the median cumulative dose equivalent, the value for the experimental group was also less than that for the control group (t=1.182, 1.182, both P<0.05) . The more the operator used the lead screen, the shorter the time could take. So the time the experimental group took was decreased with the increasing proficiency, and the time was closed to the control group. Conclusions When using lead screen, the radiation equivalent rate of operation personnel was low. The cumulative dose equivalent decreased, and all such changes were due to the time used in the operation. Lead screen exhibited its practical application value on radioprotection. Key words: Positron-emission tomography; Tomography, X-ray computed; Radiation dosage; Radiation protection