A feasibility study on reduction of the entrance-surface dose to neonates by use of a new digital mobile X-ray system
A feasibility study on reduction of the entrance-surface dose to neonates by use of a new digital mobile X-ray system
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使用新型数字移动X射线系统减少新生儿入射表面剂量的可行性研究
DOI：
10.1007/s12194-012-0182-1
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Hiraoka M.
中科院分区：
文献类型：
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作者：
Utsunomiya S;Monzen H;Akimoto M;Mukumoto N;Ishihara Y;Shiinoki T;Nakamura M;Miyabe Y;Sato S;Matsuo S;Hiraoka M.
我们研究了新生儿进入表面剂量（ESD）和数字移动x射线系统发出的散射辐射剂量。该系统配备了一种新型平板探测器，用于新生儿重症监护病房。在本研究中，在常用的x射线成像条件下进行了以下三个实验：(1)评估了FPD的数字特性；(2)用患者皮肤剂量计（PSD）测量水等效幻体的ESD；(3)用电离室测量仪测量了培养箱周围的散射辐射。数字特性曲线表明，该系统具有良好的线性度，在50 ~ 110 kV范围内对比度特性不受管电压的影响。单次曝光的静电放电强度为51 ~ 52 μGy（厚度为8cm）， 33 ~ 34 μGy（厚度为4.5 cm）。培养箱周围测得的剂量为0.1 ~ 0.6 μSv或低于可测限。新设备的使用证明了对患者和操作人员减少静电放电的潜力。
We investigated the neonatal entrance-surface dose (ESD) and doses of scattered radiation emitted by a digital mobile X-ray system. The system is equipped with a novel flat-panel detector and is used in the neonatal intensive care unit. In the present study, the following three experiments were performed on frequently used X-ray-imaging condition: (1) the digital characteristics of the FPD were evaluated; (2) the ESD to a water-equivalent phantom was measured with a patient skin dosimeter (PSD); and (3) the scattered radiation around the incubator was measured with an ionization chamber survey meter. The digital characteristic curve showed that the system had excellent linearity and that the contrast characteristics were not affected by the tube voltage in the range of 50–110 kV. The ESD was 51–52 μGy with an 8-cm-thick phantom and 33–34 μGy with a 4.5-cm phantom, for one exposure. The doses measured around the incubator were 0.1–0.6 μSv or below measurable limits. Use of the new device demonstrates the potential of reducing the ESD to the patient and operator.