Reliable technique for acromion density assessment on CT

IF 2.2 4区 医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Shu Su, Xiao Chen, Sarah Warby, Julie Tate, Penelope Brooke, Shane Barwood, Gregory Hoy, Brendan Soo, Richard Dallalana, Warwick Wright, Andrew H Rotstein
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引用次数: 0

Abstract

Introduction

Acromial stress fracture (ASF) is an uncommon but acknowledged complication of reverse total shoulder arthroplasty (RTSA). There is no standardised method to directly measure the bone mineral density of the acromion to allow a detailed analysis of the potential mechanism of ASF. The aim is to establish a reliable and reproducible technique for measurement of acromial density on computer tomography (CT).

Methods

A retrospective review on CT scans obtained for three groups of patients: those planned for RTSA (n = 26); age and gender-matched non-operative (n = 26); and young non-operative patients (n = 28) were performed. Standardised axial images of 1 mm thickness at 1 mm increments were created following horizontal straightening on the coronal and sagittal views. To assess inter-rater reliability, two senior CT radiographers performed density measurements using standard region of interest (ROI) tool on the CTs with the ROI placed on the mid (ROI 1) and posterior (ROI 2) acromion. ROIs were selected as the most common locations for acromion fracture post RTSA. Measurements were repeated at least 6 weeks apart. Intra-class coefficients (ICC) were used to determine intra- and inter-rater reliability.

Results

ICCs demonstrated good to high intra-rater and inter-rater reliability for both ROI 1 and ROI 2 across all three groups. The lower margin of 95% confidence intervals was more than 0 for all intra-class coefficients.

Conclusion

This study demonstrates a reliable method of measuring acromion density on CT. This method can be used to assess bone mineral density in the clinical setting and in future studies investigating ASF following RTSA.

通过 CT 评估肩峰密度的可靠技术
引言 肩峰应力性骨折(ASF)是反向全肩关节置换术(RTSA)中一种不常见但公认的并发症。目前还没有直接测量肩峰骨矿物质密度的标准化方法,因此无法对肩峰应力性骨折的潜在机制进行详细分析。方法回顾性分析三组患者的 CT 扫描结果:计划接受 RTSA 的患者(26 人);年龄和性别匹配的非手术患者(26 人);年轻的非手术患者(28 人)。在冠状切面和矢状切面上水平拉直后,创建厚度为 1 毫米、增量为 1 毫米的标准化轴向图像。为了评估评分者之间的可靠性,两名资深 CT 放射技师使用标准感兴趣区 (ROI) 工具对 CT 进行了密度测定,感兴趣区分别位于肩峰中部(ROI 1)和后部(ROI 2)。ROI被选为RTSA后肩峰骨折最常见的位置。每隔至少 6 周重复测量一次。结果表明,在所有三组中,ROI 1 和 ROI 2 的评分者内部和评分者之间的可靠性都很好,甚至很高。结论本研究展示了一种在 CT 上测量肩峰密度的可靠方法。该方法可用于评估临床环境中的骨矿密度,也可用于未来研究 RTSA 后 ASF 的研究中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.30
自引率
6.20%
发文量
133
审稿时长
6-12 weeks
期刊介绍: Journal of Medical Imaging and Radiation Oncology (formerly Australasian Radiology) is the official journal of The Royal Australian and New Zealand College of Radiologists, publishing articles of scientific excellence in radiology and radiation oncology. Manuscripts are judged on the basis of their contribution of original data and ideas or interpretation. All articles are peer reviewed.
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