Lung Motion and Volume Measurement by Dynamic 3D MRI Using a 128-Channel Receiver Coil

摘要: Rationale and Objectives The authors present their initial experience using a 3-T whole-body scanner equipped with 128-channel coil applied to lung motion assessment. Recent improvements in fast magnetic resonance imaging (MRI) technology have enabled several trials of free-breathing three-dimensional (3D) the lung. A large number image frames necessarily increases difficulty analysis therefore warrants automatic processing. However, intensity homogeneities images prior dynamic 3D MRI studies been insufficient use such methods. In this study, data were obtained at 3 T that demonstrate feasibility acquiring multiple sets pulmonary scans during free breathing sufficient quality be amenable segmentation. Materials Methods Dynamic lungs two volunteers acquired acquisition times 0.62 0.76 frames/s an matrix 128 × 128, 24 30 slice encodings. instructed take shallow deep breaths scans. variation volume was measured from segmented images. Results successfully for both respiratory conditions each subject. showed whole-lung motion, including lifting chest wall displacement diaphragm, contrast distinguish these structures adjacent tissues. average time complete segmentation one 4.8 seconds. tidal consistent known volumes healthy subjects performing deep-breathing maneuvers. temporal resolution measure breathing. Conclusion This protocol provided spatial delineate diaphragmatic domes active addition, signal-to-noise ratio adequate perform