EP2162188A2 - Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette - Google Patents

Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette

Info

Publication number
EP2162188A2
EP2162188A2 EP08756815A EP08756815A EP2162188A2 EP 2162188 A2 EP2162188 A2 EP 2162188A2 EP 08756815 A EP08756815 A EP 08756815A EP 08756815 A EP08756815 A EP 08756815A EP 2162188 A2 EP2162188 A2 EP 2162188A2
Authority
EP
European Patent Office
Prior art keywords
light
light source
irradiation head
visible
irradiation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08756815A
Other languages
German (de)
English (en)
Inventor
Andreas Lechthaler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lechthaler Andreas
Original Assignee
Strohal Robert
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Strohal Robert filed Critical Strohal Robert
Publication of EP2162188A2 publication Critical patent/EP2162188A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/0613—Apparatus adapted for a specific treatment
    • A61N5/0616—Skin treatment other than tanning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00057—Light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B2018/2015—Miscellaneous features
    • A61B2018/2025—Miscellaneous features with a pilot laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N2005/0658—Radiation therapy using light characterised by the wavelength of light used
    • A61N2005/0661—Radiation therapy using light characterised by the wavelength of light used ultraviolet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B60W2050/146—Display means

Definitions

  • the invention relates to a device for irradiating an object, in particular the human skin, with UV light, with a UV light source and an irradiation head containing an imaging optics, from which UV light is thrown onto the object.
  • a visible light emitting light source is provided whose light on the imaging optics of the irradiation head can be projected onto the object, wherein in the irradiation head, a preferably electronically controlled device for variable adjustment of the light distribution is arranged on the object and this device selectively or simultaneously with UV light from the UV light source and / or visible light from the visible light emitting light source acted upon is.
  • Fig. 1 shows a schematic representation of an embodiment of a device according to the invention.
  • Fig. 2 shows another embodiment, which is also suitable for outpatient treatment.
  • Fig. 3 shows an embodiment which is particularly suitable for inpatient treatment, for example in a clinic.
  • 4, 5, 6, 8, 9, 10 and 11 show various operating states of a further embodiment of the invention in a schematic representation (with LCOS modulator).
  • FIG. 7 shows an explanatory illustration relating to the spatial detection of the course of the surface of the object, in particular the human skin.
  • 4a, 5a, 6a, 8a, 9a, 10a and 11a show different operating states of a further embodiment of the invention in a schematic representation corresponding to the Fig. 4, 5, 6, 8, 9, 10 and 11, but with a DLP or DMD modulator.
  • a UV light source P is provided, which according to the invention is accommodated outside of the irradiation head 13 in a separate light source housing 14.
  • At least one flexible optical waveguide Q is arranged between the light source housing 14 and the irradiation head 13, via which UV light from the UV light source P can be fed to the irradiation head 13.
  • the flexible optical waveguide can contain at least one quartz glass fiber for the low-loss conduction of UV light. To protect the flexible optical fiber, it can be sheathed in a light-tight manner.
  • the flexible optical waveguide is connected via a detachable connection 15 to the UV light source housing 14 or the irradiation head 13.
  • the UV light is coupled into the optical fiber via a coupling-in collimation optics 16 and coupled out in the irradiation head 13 via a coupling-out collimation optics 17.
  • a control computer R which has a keyboard S or another input device, in particular a computer mouse and / or a light pen / graphics tablet, etc.
  • the control computer R has a screen (DFD, plasma, CRD) or a holographic projector as a display device.
  • the control computer is a laptop or a notebook.
  • a preferably electronically controllable via the lines 18 means for changeable adjustment of the light distribution on the object 3, more precisely, be arranged to be irradiated surface 3a of the object.
  • This device is shown only schematically in FIG. 1 and bears the reference numeral 19. With such a device, which will be explained in more detail with reference to the following embodiments, it is possible to selectively subregions of the area to be irradiated 3a of the object 3 with different intensities irradiate what is for the treatment of various skin diseases of great advantage, because it allows the radiation intensity to adapt to the local infestation well.
  • the light passes through the imaging optics 20, which is shown only schematically as a lens, but may in practice also comprise a plurality of lenses, from the irradiation head 13 from.
  • the irradiation head may further comprise a light source F emitting visible light, which is shown only schematically in FIG.
  • This light source makes it possible to project a visible image on the skin.
  • a camera preferably a CCD camera K supplying electrical image signals, can be arranged in the irradiation head 13.
  • This camera can - as will be explained in more detail below - on the one hand receive light from the UV light source P or the color light source F, which is mainly relevant for calibration purposes.
  • the CCD camera K can also take pictures of the section 3a to be irradiated and detect the UV light reflected by the surface 3a during the irradiation. This will be explained in more detail below.
  • a device I for detecting the distance and / or the spatial profile of the surface 3a of the object can be arranged on the irradiation head 13.
  • This device it is possible to precisely define the intensities that actually reach the subregions of the surface 3a.
  • the intensity depends not only on the energy radiated in a certain solid angle range, but also on the area of the subarea that is irradiated. This area in turn depends on the distance and the spatial course of the surface of the object. If you know the geometric course, you can - as will be explained in more detail below - the energy doses in the individual solid angle areas such correct that on the surface to be irradiated really the desired intensity is caused. This is even dynamic, for example, when the patient is breathing and thus moves the surface 3a.
  • a generally designated 21 supporting device for the irradiation head 13 is further provided.
  • the irradiation head 13 may be slidably and / or rotatably mounted on the support device in order to achieve an optimal alignment with respect to the surface to be irradiated. It is also possible that the irradiation head is adjustable by motor.
  • a supplied via a beam splitter 22 with light from the UV light source P photospectrometer O may be provided in order to detect the spectral light distribution of the UV light of the UV source P.
  • a shutter 24 which is preferably movable by way of a motor 23 may be provided in the light source housing. About this can be prevented even when the UV light source P is the exit of light into the light guide and thus the irradiation head, if there the UV light is not needed.
  • UV light source housing 14 is connected to the control computer R via lines 25, which may also be combined to form a collecting line.
  • FIG. 2 shows an embodiment of a device according to the invention, which is suitable for ambulatory use.
  • the same reference numerals designate the same parts as in FIG. 1.
  • a region 3a can be defined via the irradiation head. Over the opening angle h, the size of the irradiation window g. The distance is denoted by f.
  • the irradiation head 13 can be moved linearly in height e telescopically. Also, the irradiation head 13 in the elevation angle (arrow 26) and in the azimuth angle (arrow 27) can be adjusted. A linear adjustment in the horizontal direction (arrow 28) is possible. Finally, the irradiation head 13 can also be rotatable about the dashed optical axis leading to the patient, preferably by 90 °. A rectangular irradiation area can thus be changed from portrait to landscape format (and conversely). In this way, the treatment head 13 can be aligned optimally relative to the object (patient 3), which in the present example sits on a chair.
  • the irradiation head 13 is likewise mounted adjustably on a carrying device 21. This has two motor-adjustable linear axes in the vertical and horizontal directions. The pivot bearing of the irradiation head 13 can be adjusted by motor. This setting is made via the control computer R, which is in a manner not shown in connection with the servomotors.
  • the object or the patient himself is also movable by standing on a turntable 29 controlled by the control computer R. It is therefore for the relative orientation of radiation head 13 on the one hand, and patient 3 on the other hand, not only the irradiation head, but also the patient moves.
  • the irradiation head 13 is shown in greater detail.
  • optical details such as the collimating optics, which are not necessary for understanding, are omitted for the sake of simplicity.
  • the structure of the overall system is similar to that in FIG. 1.
  • the electronic components of the control computer R including keyboard S and screen T are also arranged separately and communicate via lines or a bus system with the irradiation head 13 on the one hand, and the UV light source housing 14 on the other.
  • the beam splitter B preferably a dichroic prism
  • light from the UV light source P can pass via the optical waveguide Q
  • light from a colored light source F can reach the further components of the irradiation head or the object 3a.
  • the system is in positioning or teach-in mode.
  • the diaphragm 24 of the UV light source P is closed or the UV light source is switched off.
  • the visible light emitting light source F is turned on. It can be an RGB unit preferably containing light-emitting diodes, which can emit both colored and white light.
  • colored light for example red light, is emitted.
  • the light source F is driven by the ⁇ electronic control unit (control computer R) which is arranged in the irradiation head 13 (sub) control unit such as FPGA or DSP.
  • a temperature monitoring sensor E monitors the temperature of the visible light emitting RGB light source F.
  • EASLM electronically controllable spatial light modulator
  • This modulator may, for example, be a Liquid Crystal on Silicon Unit (LCOS).
  • the modulator D is controlled via an image data processing unit G by the control unit H.
  • the light modulator D which as well as other components can be monitored by means of temperature sensors E, it is possible, for example in an imaginary pixel grid, to illuminate certain fields on the object with variable brightness or intensity, but not others. Finally, the modulator D forms the core for the selective radiation of partial areas on the object to be irradiated.
  • the modulator D is driven to provide a relatively large checkered pattern on the object (see FIG. 4, bottom right).
  • the exit aperture 30 is opened above the engine 31.
  • the imaging optics 20 can be controlled by the control unit H motor (m) to realize a zoom and einstellfunktion preferably continuously adjusted. After adjusting the zoom and focus (visible by sharp image of the checkerboard pattern on the object), the alignment of the irradiation head can be relative to the patient or to the object in such a way that in the active irradiation window the trapezoidal and pincushion distortion is minimally pronounced by the generally curved course of the object.
  • the camera K described below and the 3D scanner I are not active. This is only a pre-adjustment of the radiation head relative to the patient.
  • FIG. 4a shows another embodiment in the same operating mode as FIG. 4.
  • a DLP Digital Light Processing
  • this may be a digital micromirror device (DMD) housed on a chip.
  • DMD digital micromirror device
  • Such a DMD chip has microscopically small mirrors distributed over the surface whose edge length can be on the order of magnitude of 10 ⁇ m. These mirrors can be controlled electronically, for example by electrostatic fields, in their alignment. Due to the inclination of the individual micromirrors on the DMD chip D, the light is either reflected directly to the beam splitter C and further onto the patient or directed to the absorber J. By pulse-width modulated control of the mirror different brightness levels of the individual pixels can be generated. Otherwise, the structure is the same as in the LCOS variant according to FIG. 4.
  • the screen D will be arranged in such a way that it can be viewed by the viewer, for example the doctor, as well as the irradiating area of the object 3. It is thus possible to display this on the screen To look at the object simultaneously with a correlated image produced by the color light source F over the modulator, which is of great advantage for control purposes.
  • Fig. 5 shows the same device as Fig. 4, but in a different operating mode - namely to capture an image of the area to be treated (3a) of the object during the next treatment setup step.
  • the device in the irradiation head 13 has a camera K, preferably a CCD camera. This gives electrical image signals to the control unit H and on to the control computer R.
  • the control computer R After the correctly completed positioning according to FIG. 4, the conclusion is confirmed on the control computer R by means of an operating or input element S. Thereafter, the modulator D is automatically controlled such that the light originating from the color source F is modified to a regular pattern in the irradiation window or on the region 3 a of the object 3 to be irradiated.
  • the CCD camera then takes a picture of the projection pattern, which is generally distorted because of the curvature of the surface 3a, which can be stored on the screen D as a basis for the subsequent spatial imaging.
  • FIG. 5 a shows a variant of the invention according to FIG. 5, in which, in FIG. 4 a, instead of the LCOS unit D, a DMD unit D is used.
  • the method step according to FIGS. 6 and 7 essentially concerns the consideration of the different sizes and positions of the individual irradiated subarea areas A1 to A7 (see FIG. 7) caused by the spatial structure of the surface 3a and, in the end, computationally compensating. If one knows the energy emitted in a solid angle range ⁇ of a partial surface to be irradiated, it is necessary to know the medically relevant intensity (ie energy per surface and time) to know the surface of the individual partial regions A1 to A7, which in general for each Subrange varies because it generally has a different distance from the radiation head and also a different orientation.
  • a position detection device I for contactless detection of the spatial profile of the area 3 a of the surface 3 of the object 3 to be irradiated is provided in FIG.
  • the position detection device 3 is preferably arranged in or on the irradiation head 13 and measures the surface 3a therefrom.
  • the position detection device detects an SD laser scanner for detecting the surface geometry of the object.
  • the position detection device 3 can also be a device for the projection of contain predefined patterns on the object, which are then captured by a camera and evaluated electronically.
  • the position detection device I is activated by an electronic control device R, which evaluates the measurement signals and optionally stores.
  • the 3D laser scanner I measures the surface area covered by the irradiation window and transmits its data to the control software in the control computer R via the control unit H.
  • a spatial facet model of the surface area 3a covered by the imaging optics 20 of the irradiation head 13 and of the irradiation window is calculated.
  • an SD correction matrix is calculated by the control software, with each field or element of the matrix corresponding to a partial region of the surface to be irradiated or a corresponding solid angle region.
  • the values in the 3D correction matrix are correlated with the location of the areas A1 to A7 (see FIG. 7).
  • FIG. 6a again shows the DMD variant for the LCOS variant of FIG. 6.
  • the diaphragm 30 of the irradiation head 13 is closed via the motor 31 in order to be able to adjust the CCD camera K.
  • the camera A transmits the control unit H a dark image.
  • the RGB unit F is programmed to emit white light.
  • the prism C is pivoted by 90 ° (as shown in Fig. 8), so that the light from the light source F via the modulator directly (ie, not reflected from the object 3) reaches the camera K.
  • the camera K then sends an image to the control unit H, which now calculates a correction matrix that is temporarily valid for the treatment session for possible image disturbances for dust or scratches.
  • control unit H calculates a correction matrix which optimizes non-uniform illumination from the light source F by means of a corresponding correction modulation of the modulator D to a uniform light distribution over the projection window.
  • unevenness of the light source F or other optical components can be compensated, stored and corrected in the following.
  • FIG. 8 a shows the DM D variant for the LCOS variant of FIG. 8.
  • the irradiation head 13 emits a full-area (and calibrated in accordance with the previous step) white light onto the irradiation surface 3a via the RGB light source F and the modulator D.
  • the camera K takes with this illumination, for example, several color images of the surface to be irradiated per second and transmits this image stream via the control unit H to the control software in the control computer R.
  • the control software By means of the control software, the light intensity of the color light source F can be adjusted so that the best possible exposed and thus assessable uptake of the skin area within the control system is available for further processing.
  • FIG. 9 a shows the DMD variant for the LCOS variant of FIG. 9.
  • the control software in the control computer R now changes the radiation intensity from 0% to 100% of the calculated maximum radiation intensity and the CCD camera sends these images to the control unit H.
  • FIG. 10 a shows the DMD variant for the LCOS variant of FIG. 10.
  • the physician Before the actual treatment - that is to say the irradiation with UV light begins - the physician or, in general, the operator has defined the desired intensity setpoint values for the individual partial areas of the object. This can be done, for example, from patient files that have been previously stored. But it can also be done directly on the screen, for example, by coloring with the help of a pen in front of him.
  • the doctor On the screen, the doctor has a visible image of the patient's skin and can easily identify the parts to be treated.
  • the area to be irradiated and the area identified by it on the screen can be projected onto the skin via the RGB light source and thus simultaneously controlled.
  • the illustrated irradiation device After the illustrated irradiation device always knows the position of the individual subareas via the position detection device, it is now possible to control the modulator D via the control computer R or the control unit H such that the radiant power of the UV light emitted by the irradiation head in the solid angle region corresponding to the respective subarea on the surface of the partial area of the object essentially leads to the respectively desired intensity setpoint.
  • the doctor or the operator does not need to worry about the position or the distance of the object, even if this changes, for example, by breathing, as shown schematically in Fig. 11, bottom right.
  • the modulator compensates for this by supplying a correspondingly higher energy in this solid angle region, so that the desired intensity target value is reached on the skin surface.
  • FIG. 11 a shows the DMD variant for the LCOS variant of FIG. 11.
  • the active irradiation process is shown in more detail in FIG. 11, wherein it can be seen that, parallel to the UV light, the 3D laser scanner constantly monitors the position of the object.

Landscapes

  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Radiation-Therapy Devices (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette, ce dispositif comportant une source de lumière ultraviolette et une tête d'irradiation dotée d'une optique d'imagerie et émettant des rayons ultraviolets sur l'objet. En complément de la source de lumière ultraviolette (P), une source de lumière (F) émet de la lumière visible qui est projetée sur l'objet (3) par l'intermédiaire de l'optique d'imagerie (20) de la tête d'irradiation (14), dans la tête d'irradiation étant monté un dispositif (D), de préférence à commande électronique, destiné au réglage variable de la diffusion lumineuse sur l'objet (3), lequel dispositif (D) recevant sélectivement ou simultanément la lumière ultraviolette de la source de lumière ultraviolette (P) et/ou la lumière visible émise par la source de lumière (F).
EP08756815A 2007-06-13 2008-06-12 Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette Withdrawn EP2162188A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0091707A AT505357B1 (de) 2007-06-13 2007-06-13 Vorrichtung zur bestrahlung eines objektes, insbesondere der menschlichen haut, mit uv-licht
PCT/AT2008/000205 WO2008151342A2 (fr) 2007-06-13 2008-06-12 Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette

Publications (1)

Publication Number Publication Date
EP2162188A2 true EP2162188A2 (fr) 2010-03-17

Family

ID=39941904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08756815A Withdrawn EP2162188A2 (fr) 2007-06-13 2008-06-12 Dispositif d'irradiation d'un objet, notamment la peau d'une personne, au moyen de lumière ultraviolette

Country Status (4)

Country Link
US (1) US20100114264A1 (fr)
EP (1) EP2162188A2 (fr)
AT (1) AT505357B1 (fr)
WO (1) WO2008151342A2 (fr)

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US11889979B2 (en) * 2016-12-30 2024-02-06 Barco Nv System and method for camera calibration
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Also Published As

Publication number Publication date
WO2008151342A2 (fr) 2008-12-18
WO2008151342A3 (fr) 2009-02-12
AT505357A1 (de) 2008-12-15
US20100114264A1 (en) 2010-05-06
AT505357B1 (de) 2009-04-15

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