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现在医生们有一个可以大范围地监察小肠的器具。最近批准的可与传统的内窥镜共同使用的M２A是一种可吞咽的无线影像胶囊。
Picture Snapping1) Pill
Physicians perform more than two million endoscopies2) a year on the small intestine3)，looking for cancers and other ailments4) by inserting fiber－optic5) tubes via the throat or rectum6)．This often requires sedation7)，can be uncomfortable，and some areas remain inaccessible．But now doctors have a tool that can see more of the small intestine．The M２A ――recently approved for use along with traditional endoscopes ――is a wireless video capsule that’s swallowed．It maps the intestine as you go about your business．The M２Asanps two pictures a second for eight hours as it passes through a patient’s system，beaming images to a small recorder worn at the waist．These images are then downloaded to a computer for doctors to analyze．The capsules won’t banish the endoscope，however doctors believe that the M２A is an important diagnostic8) advance．
