Department of Radiography, School of Health & Society, University of Salford, Salford, UK.
Department of Radiography, School of Health & Society, University of Salford, Salford, UK.
J Med Imaging Radiat Sci. 2020 Sep;51(3):417-424. doi: 10.1016/j.jmir.2020.04.007. Epub 2020 Jun 3.
Pressure redistribution performance of x-ray table mattresses can influence the development of pressure ulcers in at-risk populations. Interface pressure analysis, with human participants, is a common method to assess mattresses. This approach has limitations that relate to the lack of standardisation between and within humans.
This study aimed to develop and validate an anthropomorphic phantom-based method to assess x-ray table mattress interface pressures as an index of mattress performance.
A three dimensional phantom simulating an adult's head, pelvis, and heels was printed from x-ray computed tomography image data and attached to a metal frame 175 cm in length. Dry sand was added to the phantom head, pelvis, and heels to represent a range of human weights. Pressure distribution was assessed using XSensor. Phantom validation was achieved by comparing phantom mattress interface pressure characteristics, for five human equivalent weights, against 27 sets of human mattress interface pressure data.
Using the correlation coefficient R, phantom and human pressure data showed good correlation for the five phantom weights (R values: head = 0.993, pelvis = 0.997, and heels = 0.996).
A novel method to test x-ray mattresses for interface pressure was developed and validated. The method could have utility in the testing of x-ray mattresses that are in routine use and for new mattress development. Phantom interface pressure data could be provided by manufacturers to help inform procurement decisions when matching mattress characteristics to medical imaging demands and the underlying patient populations.
X 射线检查台床垫的压力再分布性能会影响高危人群中压疮的发展。使用人体进行界面压力分析是评估床垫的常用方法。但这种方法存在一些局限性，主要是因为人与人之间缺乏标准化。
本研究旨在开发和验证一种基于人体模型的方法，以评估 X 射线检查台床垫的界面压力，作为评估床垫性能的指标。
使用 X 射线计算机断层扫描图像数据打印出一个模拟成人头部、骨盆和脚跟的三维模型，并将其连接到一个 175 厘米长的金属框架上。在模型的头部、骨盆和脚跟处添加干沙，以代表人体重量的不同范围。使用 XSensor 评估压力分布。通过将五个人体等效重量的模型床垫界面压力特征与 27 组人体床垫界面压力数据进行比较，对模型进行验证。
使用相关系数 R，模型和人体压力数据在五个模型重量（头部 R 值 = 0.993，骨盆 R 值 = 0.997，脚跟 R 值 = 0.996）之间显示出良好的相关性。
开发并验证了一种用于测试 X 射线检查台床垫界面压力的新方法。该方法可用于测试常规使用的 X 射线检查台床垫和新的床垫开发。制造商可以提供模型界面压力数据，有助于在匹配床垫特性与医学成像需求以及潜在患者人群时，为采购决策提供信息。
