| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten the X-irradiation time and to equalize the quantity of radiation in the direction of thickness of a blood pack by measuring the total quantity of X-radiation, obtaining the total quantity percentage of the central part of a blood pack, and further obtaining the integrating dosage at a measurement point to control X-irradiation of the surface and back of the pack. SOLUTION: An output signal of a dosimeter probe 6 for measuring the dosage of X-irradiation is inputted to a control device 27. According to the signal, the dosage rate at the measurement point is operated. The integrating dosage at the measurement point is operated from the above dosage rate and the irradiation time calculated from the preset quantity of irradiation in the central part of a pack, that is, the preset dosage, for example, about 1,500 roentgen. Subsequently, according to the integrating dosage, the dosage of X- irradiation of the surface and the back of the blood pack is controlled. Thus, the quantity of irradiation of the central part of the pack is managed and the surface and back are reversed to be irradiated, whereby the dose of the pack central part can be equalized regardless of thickness of the blood pack.</p> |
