In situ assessment of polyp size during colonoscopy is of clinical importance for optimal treatment and follow-up. In this initial study, we evaluated the accuracy and usability of a virtual tape measure, a novel device providing quantitative measurements, as compared with current practice of unassisted assessment and using biopsy forceps as scale. The virtual tape-measure prototype was shown to provide submillimetre accuracy, almost an order of magnitude better than current practice. It has the potential of becoming the standard for quantitative in situ polyp size measurement; however, further studies in a clinical setting are needed. In colonoscopy, there is clinical importance for in situ assessment of polyp size.1 To date, no commercially available medical endoscope has the capability of performing measurements. There are several mechanical devices designed to perform these measurements, such as a calibrated hood2 and a ruler snare,3 but these are mainly used in research, as they are limited in their capacity and are difficult to operate. Therefore, in current practice, endoscopist estimates are based on acquired expertise and/or an approximate scale (eg, using biopsy forceps), leading to a large …

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测量息肉大小的新型装置：一项离体动物研究

结肠镜检查期间息肉大小的原位评估对于最佳治疗和随访具有临床重要性。在这项初步研究中，我们评估了虚拟卷尺的准确性和可用性，这是一种提供定量测量的新型设备，与当前的无辅助评估和使用活检钳作为尺度的做法相比。虚拟卷尺原型被证明可以提供亚毫米级的精度，几乎比目前的做法好一个数量级。它有可能成为定量原位息肉大小测量的标准；然而，还需要在临床环境中进行进一步研究。在结肠镜检查中，息肉大小的原位评估具有临床重要性。1 迄今为止，还没有市售的医用内窥镜能够进行测量。有多种机械设备可用于执行这些测量，例如校准罩 2 和标尺圈套器 3，但这些主要用于研究，因为它们的容量有限且难以操作。因此，在目前的实践中，内窥镜医师的估计是基于获得的专业知识和/或近似规模（例如，使用活检钳），导致大量……