Is it possible to image in vivo medical nanomachines using an imaging technique such as MRI, or would one have to look directly at tissue?
Yes, nanodevices could probably be observed at work inside the body using MRI, especially if their diamond components were manufactured using mostly 13C atoms rather than the more common natural 12C isotope of carbon, since 13C has a nonzero nuclear magnetic moment. But in the nanomedical era, such an approach may again be somewhat anachronistic. Here’s why. Applying the classical medical model to a typical nanomedical treatment, the medical nanodevices would first be injected into a human body, and would then go to worksay, in a specific organ or tissue mass. The physician wants to be able to monitor their progress, and make certain that the nanodevices have gotten to the correct target treatment region. So the first instinct of the contemporary physician who is contemplating a prospective nanomedical treatment will be to insist on the ability to directly image the nanorobots. In other words, the doctor wants to be able to scan a section of the body, and actually see the nanodevices c
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