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SVTPerformance's Chain of Restaurants
Road Side Pub
... not that I was ever gone ...
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<blockquote data-quote="James Snover" data-source="post: 16821230" data-attributes="member: 67454"><p>Ironically, yes. The x-ray systems I work on have features called subtraction, roadmap, and clearstent.</p><p></p><p>Subtraction: you take an image. Then you add contrast to the patient's blood, and take the same image again. The software subtracts out everything except what has changed from the first image. This eliminates all the surrounding anatomy of the body, and lets the surgeon see the vasculature in clear relief.</p><p></p><p>Roadmap: the software then takes the subtracted image, catheters are inserted, and you see only the catheter itself moving in real time, superimposed over the contrast image taken, above.</p><p></p><p>Clearstent: building on the same principles above, the software illustrates only the position of the stent, as it moves through the vasculature, and is placed with sub-millimeter precision, by the surgeon, exactly where he or she determines it should be.</p><p></p><p>That's all a pretty basic, vastly over-simplified view.</p><p></p><p>And they'll shoot 3D images with superior resolution and lower delivered radiation dose compared to dedicated CT machines! But there are still lots of studies where dedicated CT machines excel.</p><p></p><p>Neat bit of trivia: a few years ago, some clever astronomy types figured out you could use the exact same technique of subtraction, to see changes in otherwise chaotic systems.</p></blockquote><p></p>
[QUOTE="James Snover, post: 16821230, member: 67454"] Ironically, yes. The x-ray systems I work on have features called subtraction, roadmap, and clearstent. Subtraction: you take an image. Then you add contrast to the patient's blood, and take the same image again. The software subtracts out everything except what has changed from the first image. This eliminates all the surrounding anatomy of the body, and lets the surgeon see the vasculature in clear relief. Roadmap: the software then takes the subtracted image, catheters are inserted, and you see only the catheter itself moving in real time, superimposed over the contrast image taken, above. Clearstent: building on the same principles above, the software illustrates only the position of the stent, as it moves through the vasculature, and is placed with sub-millimeter precision, by the surgeon, exactly where he or she determines it should be. That's all a pretty basic, vastly over-simplified view. And they'll shoot 3D images with superior resolution and lower delivered radiation dose compared to dedicated CT machines! But there are still lots of studies where dedicated CT machines excel. Neat bit of trivia: a few years ago, some clever astronomy types figured out you could use the exact same technique of subtraction, to see changes in otherwise chaotic systems. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
... not that I was ever gone ...
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