由相位对比MRI（PC-MRI）评估的血流速度波形计算的搏动指数（PI）已被认为是血管功能障碍的有用指标。先前研究已证明，使用超高场7T的更高分辨率2D PC-MRI可以可靠地表征脑穿支动脉的血流速度和搏动性。最近的7T研究报道，脑穿支动脉的较高PI与cSVD相关，表明脑小动脉的搏动性可作为cSVD的敏感 ...

Healing a broken bone can take months, and knowing whether recovery is on track often takes just as long. Doctors typically rely on periodic X-rays, capturing two-dimensional images to see how the ...