SU1363549A1 - Spectrofluorometric endoscope - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is the diagnosis of the state of tissues by spectral characteristics. The endoscope contains a source of ultraviolet radiation 1, a light guide 2, a registration light guide 3, a monochromator 4 with a scanning spectrum and a photodetector 5. The input light guide 2 may contain an optical system 8 for inputting ultraviolet radiation of source 1. Part of the endoscope may include source 10 backlight. 1 il.

Description

The invention relates to medical technology and can be used to digest tumors of human internal organs.

. The purpose of the invention is to diagnose the condition of tissues by special (tractive characteristic).

The drawing shows the block diagram of the proposed endoscope.

It contains a source of ultraviolet radiation 1, for example, an ultraviolet laser, an illumination light guide 2, a registration light guide 3, a monochromator 4 s, a spectrum sweep and a photodetector 5. A photochronograph is used as a photodetector 5, which is synchronized with a mono chromator 4. As the photodetector 5, other radiant energy receivers, such as PMT, can be used, however, in this case it is necessary to additionally enter the information processing unit 6. The light guide 2 at its entrance may contain a set of attenuators 7 and an optical system 8 for inputting ultraviolet radiation from source 1. The endoscope may include a light guide, 9 lights and a light source 10, such as a glow lamp or a helium-neon laser.

A spectrofluorimetric endoscope is used as follows.

The radiation source 1, for example, a pulse-periodic laser that generates ultraviolet radiation with a wavelength of 340-350 nm; with a pulse duration of 10 s, an intensity of B / cm is inputted into the light guide 2 through the standard scale) Fokon. The source 10 for illumination of internal organs is the red light of a helium-neon laser or the light of a different wavelength in the visible part of the spectrum, generated by other gas discharge sources.

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mi The light for illumination of the internal organ is selected in such a way that its length does not coincide with the wavelength of the luminescence emission spectrum of the studied part of the organ. The use of a pulsed periodic laser permits the use of a photoelectric luminescence detection technique without additional modulation of the light flux. The high Mouin of the probe radiation pulse, which is 10–10 times higher than the power of a cw laser, allows one to observe the luminescence of objects with a low quantum yield. The luminescent radiation of an object enters through a registration light guide 3 to a monochromator 4 with a sweep of the spectrum, the output of which is a photochronograph synchronized with the sweep of the spectrum of the monochromator 4.

The photoreceiver 5 can be used as a quick response photomultiplier of the ELU-FT type with a time resolution of 10 s and a gain of 10 - 10. The signal from the PMT is recorded with an oscilloscope or a peak voltmeter. Information processing is carried out using a DZ-28 mini-computer with display of the results on the display.

Claims (1)

Invention Formula A spectrofluorimetric endoscope containing a source of ultraviolet radiation and an illuminating light guide, a recording light guide and a photodetector, characterized in that, in order to diagnose tissue state according to spectral characteristics, a photo scanning monochromator is installed between the recording light guide and the photodetector, which is synchronized with the sweep of the spectrum of the monochromator.