Comments on: Imaging system with four different wavelengths obtained from LEDs http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/ Just another WordPress weblog Sun, 12 Oct 2008 01:13:01 +0000 http://wordpress.org/?v=1.5.1-alpha by: Medical Syndromes http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-90 Tue, 24 Jun 2008 18:11:31 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-90 i took a great peice of knowledge abt this from here and anow putting it up on myweb. i took a great peice of knowledge abt this from here and anow putting it up on myweb.

]]> by: Gardco Lighting http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-87 Mon, 17 Mar 2008 09:32:45 +0000 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-87 <strong>Gardco Lighting</strong> The normal individual would be under the impression that taking the time to complete data on this subject is a waste of resources. Gardco Lighting

The normal individual would be under the impression that taking the time to complete data on this subject is a waste of resources.

]]> by: Backpain Guide http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-68 Fri, 10 Aug 2007 03:25:42 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-68 <strong>Backpain Guide</strong> When you are searching for disease web pages and material, be sure to use all of the sources available. Backpain Guide

When you are searching for disease web pages and material, be sure to use all of the sources available.

]]> by: Lindsay B. http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-49 Wed, 18 Oct 2006 01:30:27 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-49 MM, I am a curator for an art/culture/science exhibition going on at Columbia College Chicago in March 2007. We would love to show this project as part of the exhibition. You can read more about the show at www.diychicago.org. If interested please get in touch. Many thanks. MM, I am a curator for an art/culture/science exhibition going on at Columbia College Chicago in March 2007. We would love to show this project as part of the exhibition. You can read more about the show at www.diychicago.org. If interested please get in touch. Many thanks.

]]> by: Mike http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-25 Sun, 16 Apr 2006 04:25:14 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-25 The spectrum emitted by an LED is 25-50 nm wide. This is much narrower than the 150-200 nm bandwidth of the cones in the eye. I think the color filters in a color camera also have a relatively wide bandwidth, like the eye. So the LEDs offer a few times higher spectral resolution than is possible with white light alone, (short of using a spectrometer). Also, there are a lot of combinations between 4 (or more) LED colors, and the RGB camera filters. 4! * 3! = 24 * 6 = 144 (note not all are useful) Simple software can process the pixel data arithmetically (yielding more color combinations), thus enhancing the resolution even further. The spectrum emitted by an LED is 25-50 nm wide. This is much narrower than the 150-200 nm bandwidth of the cones in the eye. I think the color filters in a color camera also have a relatively wide bandwidth, like the eye. So the LEDs offer a few times higher spectral resolution than is possible with white light alone, (short of using a spectrometer).

Also, there are a lot of combinations between 4 (or more) LED colors, and the RGB camera filters.
4! * 3! = 24 * 6 = 144 (note not all are useful) Simple software can process the pixel data arithmetically (yielding more color combinations), thus enhancing the resolution even further.

]]> by: Administrator http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-24 Sat, 01 Apr 2006 14:37:44 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-24 Personally me, I cannot define melanoma or other types of lesions. My method is only showing the relative distribution of pigments in skin layers. Presence of melanin in dermis doesn't show that it is melanoma or Spindle Cell nevus or Spitz nevi. There are so many factors who define lesion type: melanin spreading shape inside dermis, blood behavior inside lesion and around it, the thickness of collagen layer in papillary dermis. As i don't have qualification for this, I just can do a math and nothing more. And it needs much More investigations to be done to use this method of visualisation. This tool i made just can be a tool to dermatologist to see more inside the structure of formation of lesions, but it doesn't show is it a melanoma or other type of formation. Very good question. Thank you. Personally me, I cannot define melanoma or other types of lesions. My method is only showing the relative distribution of pigments in skin layers. Presence of melanin in dermis doesn’t show that it is melanoma or Spindle Cell nevus or Spitz nevi. There are so many factors who define lesion type: melanin spreading shape inside dermis, blood behavior inside lesion and around it, the thickness of collagen layer in papillary dermis. As i don’t have qualification for this, I just can do a math and nothing more. And it needs much More investigations to be done to use this method of visualisation. This tool i made just can be a tool to dermatologist to see more inside the structure of formation of lesions, but it doesn’t show is it a melanoma or other type of formation. Very good question. Thank you.

]]> by: Jime http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-23 Sat, 01 Apr 2006 01:56:51 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-23 um, it already exists and has for quite some time: http://www.dermlite.com/dl2ms.html And how do you DEFINE melanoma? What about atypical nevi? What about Spitz nevi? What about Pigmented Spindle Cell nevus of Reed? Can it tell these apart? Lentigo Maligna? What about amelanotic melanoma? Tell me what you MEAN by melanoma. um, it already exists and has for quite some time:

http://www.dermlite.com/dl2ms.html

And how do you DEFINE melanoma? What about atypical nevi? What about Spitz nevi? What about Pigmented Spindle Cell nevus of Reed? Can it tell these apart? Lentigo Maligna? What about amelanotic melanoma? Tell me what you MEAN by melanoma.

]]> by: Administrator http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-22 Fri, 31 Mar 2006 17:40:59 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-22 /*What is the mcd output of the LEDs you used?*/ I was using relative values, I did not tie to absolute I can only provide manufacturers characteristics of leds. /*What is the mcd output of the LEDs you used?*/
I was using relative values, I did not tie to absolute I can only provide manufacturers characteristics of leds.

]]> by: John Jorsett http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-21 Fri, 31 Mar 2006 17:20:17 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-21 What is the mcd output of the LEDs you used? What is the mcd output of the LEDs you used?

]]> by: Ptolemy http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-20 Fri, 31 Mar 2006 17:17:46 +0100 http://melanoma.blogsome.com/2006/03/29/imaging-system-with-four-different-wavelengths-lighting-obtained-from-leds/#comment-20 Your a frickin genius. Your a frickin genius.

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