RD-98智能型诊断X射线剂量仪的研制

Design of RD-98 X-ray Diagnostic Dosimeter

目的 研制了一种响应时间快 ,能量响应好 ,测量范围宽 ,智能化程度高 ,操作简便的剂量仪。方法 探测器采用目前最新研制的半导体元件作为接受射线信号的器件 ,通过能量补偿满足探测器能量响应要求。读数仪对测量信号的快速响应及自动更换量程等智能化功能是靠数字化电路和单片机实现的。结果 目前已研制的RD 98智能型放射诊断X射线剂量仪可提供剂量测量 (0 0 0 1～ 9999mGy) ,剂量率测量 (0 0 0 1～ 9999mGy/s)和曝光时间测量 (0 0 0 1～ 9999s)。探测器的能量响应好于 5 % (5 5～ 15 0kVp) ,剂量仪测量重复性好于 1%。 结论 RD 98智能型诊断X射线剂量仪可以单独使用或与其他质控检测工具一起使用实现诊断X射机质量控制。

Objective\ RD 98 X\|ray Diagnostic Dosimeter was designed and developed with the characteristics of fast response,wide measuring range and independence of X\|ray energy in order to improve the quality of imagine and reduce the radiation dose delivered to the tested persons under the diagnostic X\|ray machine.It is suitable for measurements of dose,dose rate and exposure time in the conventional radiology. Method\ The detector of RD 98 X\|ray Diagnostic Dosimeter is made of semiconductor of Si diode as a receiver to radiation signal.To meet the requirements of energy response,the detector is compensated by special filters.The realization of all the automatic functions is based on the CPU installed in the reader with special softwares. Results\ RD 98 X\|ray Diagnostic Dosimeter is able to measure the dose ranging from 0.001 mGy to 9999 mGy,the dose rate ranging from 0.001 mGy/s to 9999 mGy/s and the exposure time ranging from 0.001 second to 9999 second.The energy response of the dosimeter from 55 keV to 150 keV is better than 5% and its reproducibility during one month is within 99%.The readings are displayed by 4 digit LED and RS\|232 port is matched for the connection of a mini\|printer. Conclusion\ The RD 98 X\|ray Diagnostic Dosimeter can be used as a test tool by itself or by a suitable combination with other equipments for quality control in X\|ray diagnostic field of hospitals.\;