Gallieni Maurizio, Rossi Umberto G, Tonolini Massimo, Ianniello Andrea, Miglio Roberta, Sabiu Gianmarco, Cariati Maurizio
Nephrology and Dialysis Unit, ASST Fatebenefratelli Sacco, Milano, Italy.
School of Nephrology, Università di Milano, Milano, Italy.
Int J Nephrol. 2023 Jan 24;2023:7901413. doi: 10.1155/2023/7901413. eCollection 2023.
The self-locating peritoneal dialysis (PD) catheter, contains a tungsten tip. The effects of magnetic resonance (MR) on the catheter were evaluated, emphasizing its MR signal, artifacts, ferromagnetism, and possible heating production during the MR sequences.
The catheter was studied in an ex vivo model using a 1.5T MR system and placed into a plastic box containing saline solution. Acquisitions on coronal and axial planes were obtained on fast gradient-echo T1-weighted and fast spin-echo T2-weighted. In vivo abdominal MR exams were also carried out.
Overall, the catheter had good visibility. In all sequences, an extensive paramagnetic blooming artifact was detected at the level of the tip tungsten ballast, with a circular artifact of 5 cm in diameter. The catheter showed no magnetic deflection, rotation, or movements during all MR sequences. After imaging, the temperature of the saline solution did not change compared to the basal measurement. Patients safely underwent abdominal MR.
The results point to the possibility of safely performing MR in PD patients carrying the self-locating catheter. The self-locating PD catheter is stable when subjected to a 1.5T MR system. However, it creates some visual interference, preventing an accurate study of the tissues surrounding the tungsten tip.
自定位腹膜透析（PD）导管含有一个钨尖。评估了磁共振（MR）对该导管的影响，重点关注其MR信号、伪影、铁磁性以及在MR序列期间可能产生的发热情况。
使用1.5T MR系统在离体模型中对导管进行研究，并将其置于装有盐溶液的塑料盒中。在快速梯度回波T1加权和快速自旋回波T2加权序列上获取冠状面和轴面的图像。还进行了体内腹部MR检查。
总体而言，导管具有良好的可视性。在所有序列中，在钨尖镇流器水平检测到广泛的顺磁性光晕伪影，直径为5 cm的圆形伪影。在所有MR序列期间，导管未显示磁偏转、旋转或移动。成像后，盐溶液的温度与基础测量相比没有变化。患者安全地接受了腹部MR检查。
结果表明携带自定位导管的PD患者安全进行MR检查是可能的。自定位PD导管在1.5T MR系统作用下是稳定的。然而，它会产生一些视觉干扰，妨碍对钨尖周围组织进行准确研究。
