DE1961386U - ROENTGEN ENHANCEMENT FILM. - Google Patents

Description

17-21.2.67 Z

DIPL-INQ. DIETER JANDER DR.-INQ. MANFRED BÖNINQ

PATENT LAWYERS

1 BERLl N 35 (DAH LEM)

HOTTENWEG 15

Phone: 76 13 03

Telegrams: Consideration Berlin

818/11 626 VS February 21, 1967

G-username registration

of the company
.Auerge seilschaft G-.mbH,

1 Berlin 65
Friedrich-Krause-Ufer 24

"X-ray intensifying screen"

X-ray intensifier films made of luminescent inorganic Substances are known. Their advantage is that they due to the high atomic number of the iuminescent material absorb a larger proportion of X-rays than the X-ray film itself. The part absorbed is in the form of the visible light mostly in the blue spectral range Blackening of the X-ray film used. The stronger the

- 2nd

Postal checking account Berlin-West 1743 84 Berliner Bank ΑΘ., Depositenkasse 1

DIPL..INO. DIETER JANDER DR.-INQ. MANFRED BONING PATENT LAWYERS

Luminescence cliiclit of the intensifying screens is carried out, A higher proportion of X-rays can be converted into light. A disadvantage of these strong luminescent layers however, it is that the scattering of the luminescent light in the relatively thick layer deteriorates the sharpness of the characters. This is like This can be explained as follows: Each crystal of the luminescent layer that is hit by X-rays emits its light kuge! symmetrical. Of this, only the portion that the PiIm is facing contribute to the imaging, but not the remainder of the emission. To eliminate this error, it is known, the soft or plastic back walls of the X-ray intensifying screens to be carried out in such a parbe that it contains a large proportion of what falls on sweet absorb luminescent light, so that from this back wall no reflected and thus diffusely emitted part of light radiation reaches the film. But then remains the lateral propagation of the luminescent light within the luminescent layer remains unchanged and therefore always still a considerable amount of blurring. To face this mistake, it is known in the binder of the luminescent substances to dissolve a dye. Then the lateral propagation of the iuminescence light is caused by increased absorption within the Reduced binder. The single fluorescent crystal but is then enveloped by the colored binder solution in such a way that the light absorption is almost in all directions occurs evenly..This results in addition to the gate part a sharpness improvement the disadvantage of the decrease of usable luminescent light.

The innovation ties in with the last-mentioned X-ray T / strengthening

DIPL..INO. DIETER JANDER DR.-INQ. MANFRED BDNINC

PATENT LAWYERS

foils, so to a Höntgen-Ver stronger foil, "consisting of a binder, luminescent material and a dye, at.

The innovation is based on the task, the disadvantage mentioned these slides too. "remove.

According to the innovation, this is achieved in that the! Dye in colloidal form is embedded in the binder.

! Films of this type absorb less light than normal Foil surface than the foils in which the dye is dissolved. In addition, due to the renewal according to the Measure also improves the absorption capacity for scattered light is.

It is particularly useful when the dye is black.

According to the agreement, it is also proposed that the concentration of the dye in the binder be between 0.01 and 0.2 ° , in particular 0.05 %

and / or that the pigment particles have a size between 10 "cm and 10 ^ cm.

An exemplary embodiment is shown in the single figure of the drawing.

It denotes an X-ray film with 1 and an X-ray intensifying screen with 2. In the latter, luminescent particles 3 and colloidally divided color particles 4 are embedded. The X-ray light falls on the foil or the film in the direction of the arrow 5 *

Claims (1)

RA.-B 004117-21.2.6 / Ό DIPL-INQ. DIETER JANDER DR.-INQ. MANFRED BÖNINQ PATENT LAWYERS 1 BERLIN 33 (DAHLEM) HOTTENWEG 15 Phone: 7-13 03 Telegrams: Consideration Berlin 818/11 626 February 21, 1967 G-username registration
of the company Auergesellschaft G-.mbH '
1 Berlin 65
Iriedrich-Krause-Hfer 24 Protection claims l) X-ray intensifying film, consisting of a binding agent, luminescent material and a! dye, thereby marked ,, that the latter (4) in colloidal Form is embedded in the binder. Z) X-ray intensifier film according to claim 1, characterized in that the dye (4) is black. 5) X-ray intensifying screen according to Claim 1 or 2, characterized in that the concentration of the dye (4) in the binder is between 0, Oi fo and 0.2 1 ° , in particular 0.05 $. 4) X-ray Ver stronger film according to .Anspruch 1 to J>, characterized in that the pigment particles (4) have a size between 10 cm and 10 ^ cm. Postal checking account Bsrlin-West 1743 84 Berliner Bank AG., Deposit kasse 1