Medical Physics and Clinical Engineering, Nottingham University Hospitals, Nottingham, United Kingdom.
Br J Radiol. 2021 Jul 1;94(1123):20200924. doi: 10.1259/bjr.20200924. Epub 2021 May 13.
The patient dose monitoring systems DoseWatch and DoseWise were compared to evaluate their reported patient Peak Skin Dose.
20 patients with the highest Peak Skin Dose on DoseWise were obtained; the values were converted to a Reference Point Air Kerma (RPAK) value and used for comparison. These patients were accessed in DoseWatch to obtain the recorded Worst Case RPAK. The co-ordinates for the position were obtained for each patient to find a primary and secondary angular position for the peak skin dose. The two positions produced by the two softwares were compared.
There is a mean deviation of over 0.5 Gy between the two software packages when comparing the calculated maximum skin air kerma Peak skin dose from DoseWise and the Worst Case RPAK from DoseWatch.
We have shown mean deviations between these two systems. This difference is enough, for higher peak skin absorbed dose patients, to change the management of patients, so local services must understand their models to properly implement patient management.
Neither system is incorrect, but these differences show that a deeper understanding of the analysis limitations is required to properly inform post-procedural high-skin dose follow-up procedures.
比较 DoseWatch 和 DoseWise 两款患者剂量监测系统，以评估其报告的患者峰值皮肤剂量。
获取 DoseWise 上报告的最高峰值皮肤剂量的 20 名患者；将这些值转换为参考点空气比释动能（RPAK）值，并用于比较。在 DoseWatch 中访问这些患者，以获得记录的最坏情况 RPAK。获取每个患者的位置坐标，以找到峰值皮肤剂量的主要和次要角度位置。比较这两种软件生成的两个位置。
比较 DoseWise 计算的最大皮肤空气比释动能峰值皮肤剂量和 DoseWatch 的最坏情况 RPAK 时，两种软件包之间的平均偏差超过 0.5Gy。
我们已经展示了这两个系统之间的平均偏差。对于更高的峰值皮肤吸收剂量患者，这种差异足以改变患者的管理，因此当地服务机构必须了解其模型，以正确实施患者管理。
两个系统都没有错，但这些差异表明，需要更深入地了解分析限制，以正确告知术后高皮肤剂量的随访程序。
