Radiation Oncology Department, Tri-State Regional Cancer Center, Ashland, Kentucky 41139, USA.
Otol Neurotol. 2011 Jun;32(4):553-7. doi: 10.1097/MAO.0b013e3182138793.
Processes of scattering and attenuation were investigated to determine the consequence on dose distributions by having a cochlear implant in the field of therapeutic radiation.
Radiation oncology medical accelerator beams of 6- and 18-MV x-ray energy were used. Five cochlear implants were investigated.
Each implant model was individually studied using computer dose modeling and through exercises in radiation measurement during live delivery.
No side scatter was detected, and negligible backscattering was observed for the primary device housing and electrodes. Attenuation consequences were found to be dependent on the model of cochlear implant studied and specifically dependent on the material composition of each device.
The maximum attenuated dose change for the study was found to be -8.8% for 6 MV and -6.6% for 18 MV. This study presents the first comparison of therapeutic radiation delivery versus computerized treatment simulation involving cochlear implants.
研究了散射和衰减过程，以确定在治疗性辐射场中存在耳蜗植入物对剂量分布的影响。
使用了 6 和 18 兆伏 X 射线能量的放射肿瘤学医疗加速器束。研究了五个耳蜗植入物。
使用计算机剂量建模和在实际输送过程中进行辐射测量练习，分别对每个植入物模型进行了研究。
未检测到侧向散射，并且对主要设备外壳和电极观察到可忽略的反向散射。衰减后果取决于所研究的耳蜗植入物模型，并且具体取决于每个设备的材料组成。
对于该研究，最大衰减剂量变化为 6 MV 时为-8.8%，18 MV 时为-6.6%。本研究首次比较了涉及耳蜗植入物的治疗性辐射输送与计算机化治疗模拟。
