Magnetic resonance imaging (MRI) is a widely used diagnostic technique. Patients wearing orthodontic devices are often requested to remove their appliances before an MRI exam, even when the exam involves anatomical areas far from the head, in order to prevent the heating and detachment of the appliances. The present report aims to evaluate changes in temperature and adhesive forces of molar bands after MRI at two different strength outputs. Sixty stainless steel molar bands were bonded on permanent human upper molars using two different cements: Unitek Multi-Cure Glass Ionomer Band Cement (3M Unitek, Monrovia, CA, USA) and Transbond Plus Light Cure Band Adhesive (3M Unitek). Appliances were subjected to MRI with two different strengths (1.5 Tesla and 3 Tesla). Tubes and band temperature was measured before and after MRI. Subsequently, the shear bond strength (SBS) test was calculated. Data underwent statistical analysis (p < 0.05). After MRI, molar bands exhibited significant heating, even though not clinically relevant, with a temperature increase ranging between 0.48 °C and 1.25 °C (p < 0.05). SBS did not show significant differences (p > 0.05). The present study suggests that, under MRI, the molar bands tested are safe; therefore, their removal could be not recommended for non-head and neck MRI exams. Removal would be necessary just in artifact risk areas.

The Prostate Imaging Quality scoring system version 2 (PI-QUAL v2) is a new scoring system used to assess the diagnostic quality of prostate magnetic resonance imaging (pMRI). This study investigated the impact of a focused training module on the ability of MRI technologists (MRI-Tech) and MRI-Tech students to evaluate pMRI image quality. Thirty-nine subjects including MRI-Tech students and experienced MRI-Tech with different levels of experience in pMRI participated in the study. The image quality of twenty pMRIs was evaluated before and after a dedicated lecture on pMRI image quality assessment using PI-QUAL v2 score. Receiver Operating Characteristic (ROC) curves were calculated for each scorer before and after the lecture, stratified by experience, and compared to the PI-QUAL v2 score assigned by a radiologist specialized in pMRI, using DeLong test. A significant improvement in AUC of pMRI image quality assessment was observed: from the baseline (0.31 ± 0.05) to the post-intervention (0.97 ± 0.01), with an improvement of 0.66 (p < 0.001). The ROC curves stratified by experience, demonstrated an improvement of 0.44 [0.50 ± 0.07-0.94 ± 0.01] for II-year MRI-Tech students (p < 0.001), of 0.48 [0.46 ± 0.09-0.94 ± 0.01] for III-year MRI-Tech students (p < 0.032) and 0.60 [0.33 ± 0.10-0.93 ± 0.01] for board-certified MRI-Techs (p < 0.001). The PI-QUAL v2 training module improved the ability of both MRI-Tech students and board-certified MRI-Techs to assess the quality of pMRI images.