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I read that optically, putting a reference grid on something causes computed images to have higher resolution imagery. My feeling is that I read 2 or 3 times greater resolution. A sonic grid would then heighten medical ultrasound resolution
If the sonic grid looked kind of like a QR code then there
would be heightened locationalization as well as heightened resolution as well.
Also, when I viewed an ultrasound during the 20th century a human rubbed a wand around on the surface of a body. I think a robot that raster scanned, or did a gradual outward spiral on the body physically would be higher resolution as well. If you have seen those wave a wand printers they have lower resolution than laserprinters. So this robot thing might up resolution an order of magnitude, just like heightened printer resolution
"laser guide star" is a lot like acoustic reticle
https://en.wikipedi...ki/Laser_guide_star
Laser guide star is an artificial star image created for use in astronomical adaptive optics imaging. Adaptive optics (AO) systems require a wavefront reference source in order to correct atmospheric distortion of light (called astronomical seeing). Sufficiently bright stars are not available in all parts of the sky, which greatly limits the usefulness of natural guide star adaptive optics. Instead, one can create an artificial guide star by shining a laser into the atmosphere. [beanangel, Jan 20 2017]
[link]
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Ultragrid, Sounocarty, or even Yell by Numbers. |
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[beanangel] Could you precis, for me, why an optical grid increases image resolution and then distill the factual connection stepping stones between optical and ultrasound to allow this to be bunned. |
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I have no idea what he's talking about, and will therefore feel free to misinterpret. |
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I'm not sure (in fact, I'm fairly anti-sure) that an overlain grid will improve resolution, but presumably it might help to correct distortion - if you know the grid should be square and evenly spaced, you can use that to make compensatory corrections in the image. |
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Whether this is applicable to ultrasound, I have no idea. I can't see how you can project an "ultrasound grid" onto (or, more importantly, into) the patient, except by using the same hardware that's used for the imaging, in which case I think you wind up with a round-trip error-nulling anyway, and gain no useful information. |
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As for the second quarter of the idea (using a robot to move the probe), I assumed that the wand has a sort of optical mouse-style tracking device so that it knows where it is, even when waved around by a human operator. I also wonder whether a heavily pregnant woman is going to trust a heavily servoed robot slide something around all over her abdomen. |
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[beany], if you could add some detail to this idea then we could misunderstand in a more helpful way. |
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I read that at astronomy they use a telescope emitted laser to create a reference; this then is computed to remove atmospheric distortions. I think the same thing could work with ultrasound. |
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a separate transducer could produce a predictable reticle grid (#), or possibly just a bunch of narrow beam acoustic points (::::::::). then this would be used to create higher resolution imaging. |
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As to the robotics of raster scan ultrasound, if the resolution increase is high enough from the acoustic adaptive optics, then it might be possible to image through the back of the body rather than the front. Then the ultrasound scanner could be kind of like a massage chair, with something softly moving on the back to do acoustic tomography. |
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"um" it the massage chair like scanner could be made with sticky vinyl instead of a glide lubricant. possibly. maybe. |
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At astronomy they do all katds of weird thatgs. I'm not convatced thin this would work for ultrasound. |
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I wonder if a secondary longer acoustic wave can prism the primary scan. A spreaded scan computed with a normal scan might lead to a higher resolution. |
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[WJT] thanks! I think multifrequency geometry might work |
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