Świętoń Dominik, Bernard Weronika, Grzywińska Małgorzata, Czarniak Piotr, Durawa Agata, Kaszubowski Mariusz, Piskunowicz Maciej, Szurowska Edyta
Second Radiology Department, Medical University of Gdansk, Gdańsk, Poland.
Faculty of Medicine, Medical University of Gdansk, Gdańsk, Poland.
Front Pediatr. 2021 Dec 8;9:778079. doi: 10.3389/fped.2021.778079. eCollection 2021.
Despite the significant increase in use of magnetic resonance imaging (MRI) in children, there is still a lack of normal reference values of renal size in this method and reference values are being interpolated from the ultrasound (US) studies. The study provides comparative analysis of agreement in renal length and volume measurements between MRI and ultrasound. Ninety-three children with a mean age of 8.0 ± 6.0 years, who had undergone both renal US and MRI exams, were included in the study. Participants were divided into three subgroups; each kidney was considered separately. Group 1 included 106 kidneys without any anomalies. Group 2 comprised 48 kidneys with a dilated collecting system. Group 3 included 32 kidneys with a duplicated collecting system. Measurements were taken in three dimensions, and renal volume was calculated from the ellipsoid formula. We found no significant difference between US and MRI measurements in Group 1 and Group 2. In Group 3, the difference between measurements in both imaging methods was significant. The mean difference varied from 0.05% in Group 1, 2.95% in Group 2, to 4.99% in Group 3. The US and MRI are comparable methods in renal size measurements. The interpolation of sonographic renal length and volume reference values to the MRI in the pediatric population is justified, as there is a strong agreement between both methods. Both methods can be used interchangeably for following up of the renal size changes in the pediatric population.
尽管儿童使用磁共振成像（MRI）的情况显著增加，但该方法仍缺乏肾脏大小的正常参考值，目前的参考值是根据超声（US）研究推算出来的。本研究对MRI和超声在肾脏长度和体积测量方面的一致性进行了比较分析。93名平均年龄为8.0±6.0岁、同时接受过肾脏超声和MRI检查的儿童被纳入研究。参与者被分为三个亚组，每个肾脏单独考虑。第1组包括106个无任何异常的肾脏。第2组包括48个集合系统扩张的肾脏。第3组包括32个重复集合系统的肾脏。测量采用三维方式，并根据椭圆体公式计算肾脏体积。我们发现第1组和第2组中超声和MRI测量结果无显著差异。在第3组中，两种成像方法的测量结果差异显著。平均差异从第1组的0.05%、第2组的2.95%到第3组的4.99%不等。超声和MRI在肾脏大小测量方面是可比的方法。在儿科人群中，将超声肾脏长度和体积参考值推算到MRI是合理的，因为两种方法之间有很强的一致性。两种方法可互换使用，以跟踪儿科人群肾脏大小的变化。
