Automatic Patient Positioning Control and Correction on MRI Localizer Images
摘要
Accurate anatomical positioning is essential in magnetic resonance imaging (MRI) to ensure the acquisition of diagnostically useful images. In high-throughput clinical workflows, MRI technicians must position patients rapidly, increasing the likelihood of off-isocenter placements that may necessitate manual repositioning. This study introduces an anatomy-specific, automatic patient positioning control algorithm that predicts required positioning corrections. To support this, we developed and evaluated a segmentation and post-processing pipeline designed to provide actionable feedback to the user. Two annotation strategies – morphological and abstract – were employed. Experimental results show a mean error of 0.35±1.27mm on the shoulder using morphological annotations and 0.50±1.10mm on the wrist using abstract annotations. These results suggest that the proposed approach achieves sufficient accuracy for integration into clinical MRI workflows based on the evaluated datasets.