AI 中文总结
该研究通过刚性体模表征了消费级结构光扫描仪的测量误差，发现其重复性差，大部分方差源于操作员捕获表面量，标准化分析区域可降低误差，异常值移除会带来约11%的系统面积不足。
AI 中文摘要
我们对用于获取三维几何伤口描述符的手持式消费级结构光扫描仪的测量误差进行了表征。刚性伤口护理体模不会发生变化，因此同一部位重复扫描的所有差异均为测量误差；所有重复扫描均来自同一台扫描仪、9个部位和23次扫描，因此该表征针对单台仪器。重建表面积的95%重复性极限为4.8倍，置信区间为3.0至7.0倍，因此对未改变的部位重新扫描可使读数从79%的下降变为377%的上升。45个描述符中有44个的组内相关系数低于0.50，248个描述符与处理流程的组合中没有一个达到0.75。通过固定分析区域、保持传感器和重建不变形成的误差预算，将操作员捕获的表面量对应的方差份额限制为：表面积占75%，船体面积占91%，边界框对角线占95%；仅船体体积的主要方差来自仪器，占48%，因此更换更好的传感器收益不大。整个流程中未对任何伤口进行 delineation（分割），因此与临床用于预测愈合的四周面积减少率（约2.1倍）的比较，是未经过分割的处理流程必须克服的噪声下限，而非伤口面积重现性的测量结果。标准化分析区域可将该极限降至2.13，达到该比率而非超过它。统计异常值移除会导致测得的系统面积 deficit（不足）约为11%。
英文摘要
We characterise the measurement error of a free- hand consumer structured-light scanner used to derive three- dimensional geometric wound descriptors. Rigid wound-care phantoms cannot change, so every difference between repeat scans of one site is measurement error; all repeats come from a single scanner unit, nine sites and 23 scans, so this charac- terises one instrument. The 95 percent repeatability limit for reconstructed surface area is a factor of 4.8, with a confidence interval from 3.0 to 7.0, so rescanning an unchanged site can shift the reading from a 79 percent decrease to a 377 percent increase. Forty-four of 45 descriptors fall below an intraclass correlation of 0.50, and none of 248 descriptor and pipeline combinations reaches 0.75. An error budget formed by holding the analy- sis region fixed, leaving sensor and reconstruction untouched, bounds the share of variance attributable to how much surface the operator captured at 75 percent for surface area, 91 percent for hull area and 95 percent for bounding-box diagonal; only hull volume is majority instrumental, at 48 percent, so a better sensor would buy little. No wound is delineated anywhere in the chain, so the comparison against the four-week area reduction used clinically to predict healing, a ratio near 2.1, is a lower bound on the noise an unsegmented pipeline must overcome, not a measurement of wound-area reproducibility. Standardising the analysis region cuts the limit to 2.13, meeting that ratio rather than clearing it. Statistical outlier removal imposes a measured systematic area deficit near 11 percent.
Comments8 pages, 2 figures
