Parametric imaging in salivary gland scintigraphy.

IF 1.3 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Nuclear Medicine Communications Pub Date : 2024-12-01 Epub Date: 2024-09-18 DOI:10.1097/MNM.0000000000001901
Rogério Anton Faria, Graziella Chagas Jaguar, Eduardo Nóbrega Pereira Lima
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Abstract

Salivary gland scintigraphy (SGS) is an imaging technique to evaluate functional aspects of the salivary glands. First described in 1965, visual analyses of summed images and of time-activity curves generated through regions of interest (ROI) are still the main evaluation tools used in clinical practice. An alternative to ROI-based analysis is the use of parametric images, which are images generated through pixel-by-pixel calculation of parameters from the original frames. In this article, we would like to present some parametric images for SGS studies and how to create and use them. Two images, vascular flow and uptake velocity, were created using the intercept and slope of a linear model of the frames from after the first to fifth minute of acquisition. And two others, excretion fraction and absolute excretion, by subtraction and division methods of the frames before and after sialogogue stimulation. These images allow the visualization of the spatial distribution and heterogeneity of these quantitative parameters, favoring different forms of analysis and helping with image segmentation. After more than a year of using these images in daily routine, our general impression is that they have been very helpful. This article, however, still represents only our early experiences with this technique, and clinical studies are yet needed to better evaluate this method.

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唾液腺闪烁成像中的参数成像。
唾液腺闪烁扫描(SGS)是一种评估唾液腺功能的成像技术。该技术于 1965 年首次被描述,通过感兴趣区(ROI)生成的总和图像和时间活动曲线的视觉分析仍是临床实践中使用的主要评估工具。参数图像是基于原始图像逐像素计算参数生成的图像,是基于 ROI 分析的另一种替代方法。本文将介绍一些用于 SGS 研究的参数图像,以及如何创建和使用这些图像。血管流量和摄取速度这两幅图像是利用从采集第一分钟到第五分钟的帧线性模型的截距和斜率生成的。另外两幅图像,即排泄分数和绝对排泄量,则是通过对sialogogue刺激前后的帧进行减法和除法计算得出的。通过这些图像可以观察到这些定量参数的空间分布和异质性,有利于进行不同形式的分析,并有助于图像分割。经过一年多在日常工作中使用这些图像,我们的总体印象是它们非常有用。不过,这篇文章还只是我们使用这项技术的早期经验,还需要进行临床研究,以更好地评估这种方法。
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来源期刊
CiteScore
2.20
自引率
6.70%
发文量
212
审稿时长
3-8 weeks
期刊介绍: Nuclear Medicine Communications, the official journal of the British Nuclear Medicine Society, is a rapid communications journal covering nuclear medicine and molecular imaging with radionuclides, and the basic supporting sciences. As well as clinical research and commentary, manuscripts describing research on preclinical and basic sciences (radiochemistry, radiopharmacy, radiobiology, radiopharmacology, medical physics, computing and engineering, and technical and nursing professions involved in delivering nuclear medicine services) are welcomed, as the journal is intended to be of interest internationally to all members of the many medical and non-medical disciplines involved in nuclear medicine. In addition to papers reporting original studies, frankly written editorials and topical reviews are a regular feature of the journal.
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