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From: RichD on 15 Jan 2010 20:58 is it possible to design a subcutaneous x ray? A surgeon might want to see a depth just below where he intends to cut. The point is, I thought only bones are opaque to x rays. -- Rich
From: Joerg on 15 Jan 2010 21:14 RichD wrote: > is it possible to design a subcutaneous x ray? > A surgeon might want to see a depth just below > where he intends to cut. > > The point is, I thought only bones are opaque to x rays. > That's what us guys design ultrasound machines for :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: eric gisse on 15 Jan 2010 21:27 RichD wrote: > is it possible to design a subcutaneous x ray? > A surgeon might want to see a depth just below > where he intends to cut. > > The point is, I thought only bones are opaque to x rays. And you think an x-ray is going to let you differentiate between the various types of soft tissue? > > > -- > Rich
From: Bill Sloman on 15 Jan 2010 21:34 On Jan 16, 2:58 am, RichD <r_delaney2...(a)yahoo.com> wrote: > is it possible to design a subcutaneous x ray? > A surgeon might want to see a depth just below > where he intends to cut. > > The point is, I thought only bones are opaque to x rays. Scanning confocal microscopes can get images from a millimetre below the skin. Frequency doubled fluorescence microscopy does at least as well - you focus a lot of photons at twice the wavelength that you want to excite at the point you want to image, and rely on two-photon absorbtion to excite the fluorescence you want to detect. http://en.wikipedia.org/wiki/Two-photon_excitation_microscopy The wikipeia article sees it as an alternative to confocal microscopy, but you can use two-photon excitation in a confocal microscope. -- Bill Sloman, Nijmegen
From: Royston Vasey on 15 Jan 2010 22:11
"Joerg" <invalid(a)invalid.invalid> wrote in message news:7rclovFbtdU2(a)mid.individual.net... > RichD wrote: >> is it possible to design a subcutaneous x ray? >> A surgeon might want to see a depth just below >> where he intends to cut. >> >> The point is, I thought only bones are opaque to x rays. >> > > That's what us guys design ultrasound machines for :-) > > -- > Regards, Joerg > > http://www.analogconsultants.com/ > > "gmail" domain blocked because of excessive spam. > Use another domain or send PM. And very neatly too. I had a suspect freckle excised. Before removal an ultrasound scan was done. You could see the boundary between the suspect tissue and normal skin at <0.5mm below the surface. To touch, the suspect skin felt just like any other skin - not hard or different. |