Kinoshita Kosuke, Kurihara Hitomi, Moore George E, Murakami Masahiro
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA.
Department of Veterinary Administration, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA.
Vet Sci. 2023 Feb 22;10(3):177. doi: 10.3390/vetsci10030177.
Manual computed tomographic (CT) hepatic volumetry is a non-invasive method for assessing liver volume. However, it is time-consuming with large numbers of slices. Reducing the slice number would expedite the process, but the effect of fewer slices on the accuracy of volumetric measurements in dogs has not been investigated. The objectives of this study were to evaluate the relationship between slice interval and the number of slices on hepatic volume in dogs using CT hepatic volumetry and the interobserver variability of CT volumetric measurements. We retrospectively reviewed medical records for dogs without evidence of hepatobiliary disease with abdominal CT from 2019 to 2020. Hepatic volumes were calculated by using all slices, and interobserver variability was calculated using the same dataset in 16 dogs by three observers. Interobserver variability was low, with a mean (±SD) percent difference in the hepatic volume of 3.3 (±2.5)% among all observers. The greatest percent differences in hepatic volume were decreased when using larger numbers of slices; the percent differences were <5% when using ≥20 slices for hepatic volumetry. Manual CT hepatic volumetry can be used in dogs to non-invasively assess liver volume with low interobserver variability, and a relatively reliable result can be acquired using ≥20 slices in dogs.
手工计算断层扫描（CT）肝脏容积测量是一种评估肝脏容积的非侵入性方法。然而，对于大量切片来说，它耗时较长。减少切片数量会加快这一过程，但较少的切片数量对犬类容积测量准确性的影响尚未得到研究。本研究的目的是使用CT肝脏容积测量法评估犬类切片间隔和切片数量与肝脏容积之间的关系，以及CT容积测量的观察者间变异性。我们回顾性分析了2019年至2020年腹部CT检查无肝胆疾病证据的犬类病历。使用所有切片计算肝脏容积，并由三名观察者对16只犬使用相同数据集计算观察者间变异性。观察者间变异性较低，所有观察者肝脏容积的平均（±标准差）百分比差异为3.3（±2.5）%。使用较多切片数量时，肝脏容积的最大百分比差异减小；肝脏容积测量使用≥20层切片时，百分比差异<5%。手工CT肝脏容积测量可用于犬类，以非侵入性方式评估肝脏容积，且观察者间变异性较低，犬类使用≥20层切片可获得相对可靠的结果。
