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Old May 20th 2010, 05:34 AM   #1
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Diagnostic Application of Lasers in Medical Science

Good Afternoon,

i have a question, but i have no really an idea how to question it.

Why is laser light better for diagnostics in medical science then ordinary white light?

i know that laser light is

monochromatic
coherent
collimated


but how can these properties be used for medical diagnostics?
why we dont use

polychromatic
non-coherent
collimated
light?


thx for helping

medicus
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Old May 20th 2010, 07:34 PM   #2
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I found a website which explains this.
CNRS Transversals - Use of lasers in medical diagnosis

In brief, the energy of laser can be controlled so that the body tissues would not be harmed. And for medical diagnosis, we would probably use laser with optical fibre to observe organs inside our body. If it is not monochromatic, only light of certain wavelengths and observation would be difficult.
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Old May 29th 2010, 10:40 AM   #3
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thy for help guys,

but i have another question to this topic.


Which laser light wavelenght you should use in Laser Imaging ( like for instance fluorescence microscopy)

is it better to use green or red light? and why




thank u very much for ur help

urs faithfully
medicus
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Old May 30th 2010, 12:32 AM   #4
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Well, the eye is more sensitive to green, but red light gets scatered less.
Dont know if this helps!
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Old May 30th 2010, 09:21 AM   #5
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thx for help,

maybe another point ist given by:
E=h*v

the green light is energyricher, so it is better for fluorescence imaging?


what are the limits of laser imaging?

i think the penetration depth is one point, by the use of laser doppler anemometry i think it isnt possible to measure the velocity of blood cells in like for example in heart

have u guys other limits of laser diagnostic application?

thank u very much for your help
medicus
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Old Jun 22nd 2010, 08:09 PM   #6
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I read from an article saying that for medical application, red light or infra-red is usually used but I don't find the reason.
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Old Dec 20th 2013, 03:51 AM   #7
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Great idea.
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