DE733799C - Device for reducing the scattered rays falling on the image layer during X-ray recordings - Google Patents

Device for reducing the scattered rays falling on the image layer during X-ray recordings

Info

Publication number
DE733799C
DE733799C DEC53449D DEC0053449D DE733799C DE 733799 C DE733799 C DE 733799C DE C53449 D DEC53449 D DE C53449D DE C0053449 D DEC0053449 D DE C0053449D DE 733799 C DE733799 C DE 733799C
Authority
DE
Germany
Prior art keywords
image layer
reducing
layer during
scattered rays
ray recordings
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.)
Expired
Application number
DEC53449D
Other languages
German (de)
Inventor
Dr Med Heinrich Chantraine
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.)
HEINRICH CHANTRAINE DR MED
Original Assignee
HEINRICH CHANTRAINE DR MED
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 HEINRICH CHANTRAINE DR MED filed Critical HEINRICH CHANTRAINE DR MED
Priority to DEC53449D priority Critical patent/DE733799C/en
Application granted granted Critical
Publication of DE733799C publication Critical patent/DE733799C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Description

Einrichtung zur Verminderung der bei Röntgenaufnahmen auf die Bildschicht auffallenden Streustrahlen Das Patent 716 88o behandelt eine Einrichtung zur Verminderung der bei Röntgenaufnahmen auf die Bildschicht auffallenden Streustrahlen; eine an sich bekannte, aus zwei während der Aufnahme in zur Bildschicht parallelen Ebenen zu beiden Seiten .des Objektes wandernden, ' z. B. in Bleiplatten angebrachten Schlitzen bestehende Ausblendvorrichtung ist mit einer Rasterblende bekannter Ausführung vereinigt. Die Rasterblende, deren Lamellen entweder parallel .oder senkrecht zu den Schlitzen liegen können, ist zweckmäßig mit dem der Bildschicht benachbarten Schlitz gekuppelt, so daß sie bei der Bewegung der Ausblendvorrichtung mitgenommen wird.Device for reducing the effects of x-rays on the image layer incident scattered rays. Patent 716 88o deals with a device for reducing the scattered rays incident on the image layer during x-ray recordings; one on known from two planes parallel to the image layer during the exposure wandering on both sides of the object, 'z. B. made in lead plates slots existing masking device is combined with a grid diaphragm of known design. The louvre screen, the slats either parallel or perpendicular to the slots is expediently coupled to the slot adjacent to the image layer, so that it is taken along with the movement of the masking device.

Die Erfindung hat die weitere Verbesserung einer solchen Einrichtung zum Gegenstand und besteht darin, daß die Lamellen der mit der Ausblendvorrichtung vereinigten Rasterblende schräg zu den Schlitzen angeordnet sind. Vorzugsweise beträgt der Winkel zwischen der Längsachse der Schlitze und den Lamellen der Rasterblende ungefähr 6o°. Der Vorteil der schrägen Lamellenanordnung besteht .darin, daß jegliche Rasterbildung auf der Bildschicht bei guter Streustrahlenausblendung vermieden ist. Ordnet man bei der Einrichtung gemäß dem Hauptpatent die Lamellen parallel zu den Schlitzen an, so ist zwar auch die Rasterbildung auf der Bildschicht vermieden, jedoch ist die Streustrahlenverminderung nicht so groß wie bei schräg liegenden Lamellen. Werden dagegen bei der Einrichtung gemäß dem Hauptpatent die Lamellen senkrecht zu den Schlitzen angeordnet, so erzielt man zwar die größte Streustrahlenausblendung, erhält aber auf der Bildschicht ein störendes Raster.The invention has the further improvement of such a device the subject and consists in the fact that the slats with the masking device united grid diaphragm are arranged obliquely to the slots. Preferably is the angle between the longitudinal axis of the slots and the slats of the louvre diaphragm about 60 °. The advantage of the inclined lamella arrangement is that any Raster formation on the image layer is avoided with good anti-scatter suppression. If you arrange the slats in the device according to the main patent parallel to the Slits, this also avoids raster formation on the image layer, however, the reduction in scattered radiation is not as great as with inclined ones Slats. On the other hand, in the device according to the main patent, the slats arranged perpendicular to the slots, the greatest anti-scatter suppression is achieved, but receives a disturbing grid on the image layer.

Ein Ausführungsbeispiel für eine Einrichtung gemäß der Erfindung ist in den Abb. i und 2 schematisch dargestellt. In der Abb. i sind wie in dem Beispiel des Hauptpatents die Röntgenstrahlenquelle mit i i, das Objekt mit 12, die die Bildschicht enthaltende Kassette mit 13 und die Ausblendvorrichtung mit 14 bis 17 bezeichnet. Die Rasterblende 18 ist wieder mit der Bleiplatte 17 gekuppelt und verdeckt deren Schlitz 16. Aus der Abb.2 ist ersichtlich, daß die Lamellen i 9 der Rasterblende 18 schräg zu dem Schlitz 16 der Bleiplatte 17 liegen. Sie bilden mit der Längsachse des Schlitzes einen Winkel von ungefähr 6o°.An embodiment of a device according to the invention is shown schematically in Figs. In Fig. I are as in the example of the main patent the X-ray source with i i, the object with 12, which is the image layer containing cassette with 13 and the masking device with 14 to 17 designated. The grid screen 18 is coupled again to the lead plate 17 and covers it Slot 16. From Fig.2 it can be seen that the lamellae i 9 of the grid diaphragm 18 are inclined to the slot 16 of the lead plate 17. They form with the longitudinal axis of the slot makes an angle of about 60 °.

Claims (2)

PATENTANSPRÜCHE: i. Einrichtung zur Verminderung der bei Röntgenaufnahmen auf die Bildschicht auffallenden Streustrahlen nach Patent 71688o, dadurch gekennzeichnet, daß die Lamellen der Rasterblende schräg zu den Schlitzen der Ausblendvorrichtung angeordnet sind. PATENT CLAIMS: i. Device for reducing the scattered rays incident on the image layer during X-ray recordings according to patent 71688o, characterized in that the lamellae of the grid diaphragm are arranged at an angle to the slots of the masking device. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß der Winkel zwischen der Längsachse der Schlitze und den Lamellen der Rasterblende ungefähr 6o° beträgt.2. Device according to claim i, characterized in that the Angle between the longitudinal axis of the slots and the lamellas of the louvre shutter approximately 6o °.
DEC53449D 1937-12-10 1937-12-10 Device for reducing the scattered rays falling on the image layer during X-ray recordings Expired DE733799C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC53449D DE733799C (en) 1937-12-10 1937-12-10 Device for reducing the scattered rays falling on the image layer during X-ray recordings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC53449D DE733799C (en) 1937-12-10 1937-12-10 Device for reducing the scattered rays falling on the image layer during X-ray recordings

Publications (1)

Publication Number Publication Date
DE733799C true DE733799C (en) 1943-04-02

Family

ID=7027785

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC53449D Expired DE733799C (en) 1937-12-10 1937-12-10 Device for reducing the scattered rays falling on the image layer during X-ray recordings

Country Status (1)

Country Link
DE (1) DE733799C (en)

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