医用扫描器已经能够控制细胞大小的医疗仪器了

加拿大的科学家们应用一种传统的核磁共振成像(MRI)系统来控制血管里微小的金属珠的移动。这个实验对MRI最终用于控制微小"无法拴住"的器件来进行完全非侵入式的外科手术起到了示范性的作用。

Hospital scanners could control cell-sized medical devices (Mar 20)

http://physicsweb.org/article/news/11/3/14

Physicists in Canada have used a conventional magnetic resonance imaging (MRI) system to control the movement of a small metal bead inside blood vessels. The experiment demonstrates that MRI systems could eventually control tiny "untethered" devices that perform truly non-invasive surgery (App. Phys. Lett. 90 114105).