Uniform field to measure nanoparticles in the blood?
Uniform field to measure nanoparticles in the blood?
(OP)
I am hoping to build a small and cost-effective magnetic device that can be applied to the neck to measure the presence of a small amount of magnetite nanoparticles in the bloodstream (on the order of 0.0002 to 0.002 um^3). I've looked at using permanent magnets and Helmholtz coils; however, those tend to be very pricey and are more powerful than is necessary. Is there a more effective solution?
Magnetic engineering isn't my forte so I apologize if some of my terminology or conjectures are incorrect.
Magnetic engineering isn't my forte so I apologize if some of my terminology or conjectures are incorrect.





RE: Uniform field to measure nanoparticles in the blood?
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RE: Uniform field to measure nanoparticles in the blood?
RE: Uniform field to measure nanoparticles in the blood?
TTFN
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RE: Uniform field to measure nanoparticles in the blood?
RE: Uniform field to measure nanoparticles in the blood?
RE: Uniform field to measure nanoparticles in the blood?
@williamyin08: Are you even reading these articles that you keep citing (without links, BTW)? Both cited articles talk about doing NMR on tiny samples. A human neck is literally a hundred times larger than the samples these systems are intended to test. The smallest MRI capable of reading an human neck, in-situ, is about the size of a half-height refrigerator.
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RE: Uniform field to measure nanoparticles in the blood?
@IRstuff: That was my mistake. I meant to say that I will be using the device to measure the nanoparticles in a specific spot in the carotid artery in the neck, where the 'sample' volume would be between 25 and 75uL. (The paper I cited above states a sample volume of between 1 and 100uL.) Obviously attempting to test within the entirety of the human neck would be close to impossible.
RE: Uniform field to measure nanoparticles in the blood?
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RE: Uniform field to measure nanoparticles in the blood?
Also, even if your particles are ferromagnetic, I can not imagine how Helmholtz coils could detect the presence of particles. The particles themselves present no magnetic field to be detected if without a presence of an external field. Note Helmholtz coils do not generate a magnetic field.
RE: Uniform field to measure nanoparticles in the blood?
TTFN
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RE: Uniform field to measure nanoparticles in the blood?
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P.E. Metallurgy, Plymouth Tube
RE: Uniform field to measure nanoparticles in the blood?
RE: Uniform field to measure nanoparticles in the blood?
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P.E. Metallurgy, Plymouth Tube