CS233201B1

CS233201B1 - Luminescent probe for direct measurement of X-ray film enhancement effect

Info

Publication number: CS233201B1
Application number: CS792801A
Authority: CS
Inventors: Andrej Franko
Original assignee: Andrej Franko
Priority date: 1979-04-23
Filing date: 1979-04-23
Publication date: 1985-02-14
Also published as: CS280179A1

Abstract

Vynález sa týká priameho merania luminiscenčnej emisie zosilnovacích rentgenových fólií pre snlmkovanie. Podstata vynálezu spočívá v tom, Se pozostáva zo svetlotesnej krabice 1 opatrenej přítlačnou doskou 2, nad ktorú sú v střede opatrenom otvorom upevněné jednak distančná pertinaxová dóštička 3 a jednak plechová dgítička 4 pre vsunutie do primárnej clony rontgenky a pod ktorú je v střede upevněný deflektor, pozostávajúci z klínovitáho te- . lesa 24, do ktorého aú kolmo na seba vyvrtaná dva otvory, kde v jednom otvore je umiestnené prvá SoSovka 1, upevněná nylonovým krúSkom 23 a v druhom otvore je umiestnené druhá SoSovka 25 upevněná .druhým krúžkom 26, do ktorého je zasunuté válcové púzdro 19, opatřené v dne súoso fotoodporom 21, a v priesečníku Os otvorov je umiestnené odrazná zrkadlo 22, ktoré je upevněná ku klínovítámu telesu deflektora destičkou 28, pričom fotoodpor 21 je spojený vodičmi 31 so evorkovnicou 30 u£iestnenou na bočnom plechu ,4 svetlotesnej krabice.The invention relates to the direct measurement of the luminescence emission of amplifying X-ray films for imaging. The essence of the invention consists in the fact that it consists of a light-tight box 1 equipped with a pressure plate 2, above which a distance pertinax plate 3 and a sheet metal finger 4 for insertion into the primary screen of the X-ray machine are fixed above it in the center with an opening, and below which a deflector is fixed in the center, consisting of a wedge-shaped te-. forest 24, into which two holes are drilled perpendicular to each other, where the first lens 1 is placed in one hole, fixed with a nylon ring 23, and in the second hole is placed the second lens 25, fixed with the second ring 26, into which is inserted the cylindrical sleeve 19, equipped with photoresistor 21 at the bottom, and a reflector is placed in the intersection of the holes mirror 22, which is fixed to the wedge-shaped body of the deflector by a plate 28, while the photoresistor 21 is connected by conductors 31 to the electric box 30 located on the side plate 4 of the light-tight box.

Description

233201 2233201 2

Vynález sa týká prlameho merania luminiscenčnej emisie zosilňovacích fólií.BACKGROUND OF THE INVENTION The present invention relates to a beacon measurement of luminescent emission of enhancer films.

Doteraz intenzita luminiscenčnej emisie zosilňovacích fólií sa meria iba nepriamymimetodami pomocou filmovej denzitometrie, ktorá však předpokládá dodržiavanie presne sta-novených podmienok a Standart, takže je Sašovo a prístrojovo vysoko náročné a preto pre-vádzaná iba vo výzkume výroby rtg. fólií, připadne pri ich ověřovaní v špeciélnych ústa-voch. Filmová denzitometria luminiscenčného jasu zosilňovaclch fólií v bežnej dennej praxinie je uskutočnitelná.So far, the intensity of the luminescent emission of the enhancer films is measured only by indirect means using film densitometry, which, however, presupposes adherence to precisely set conditions and Standard, so that Saša and instrumentation are highly demanding and therefore only performed in X-ray production research. foil, will be tested in special mouths. Film densitometry of the luminescent brightness of enhancer films in routine practice is feasible.

Podstata vynálezu spočívá v tom, že luminiscenčná sonda pozostáva zo svetlotesnejkrabice, opatrenej přítlačnou doskou, nad ktorou sú v střede opatrenom otvorom upevněnéjednak distančná pertinaxová doštička a jednak plechová doštička pre vsunutie do primárnejclony rontgenky á pod ktorú je v střede upevněný deflektor, pozostávajúci z klínovitéhotelesa, do ktorého sú kolmo na seba vyvrtané dva otvory, kde v jednom otvore je umiestnenáprvá šošovka upevněná nylonovým krúžkom a v druhom otvore je umiestnená druhá šošovkadruhým nylonovým krúžkom, do ktorého je zasunuté válcové púzdro, opatřené v dne súosofOtoodporom a. v priesečíku 8s otvorov je umiestnené odrazné zrkadlo, ktoré je upevněnéku klínovitému telesu deflektora doŠtičkou, priSom fotoodpor je spojený vodičmi so Ksvor-kovnicou umiestnenou na bočnom plechu. Předložený vynález umožňuje priamo v najjednoduchších podmienkach rádiodiagnostic-kých oddělení kedykolvek, bez časovej náročnosti, previesť kontrolu luminiscenčnějúčinnosti fólií pomocou luminiscenčněj sondy, ktorá se připojí ku komerčně vyráběnémumerlču osvetlenia či jasu.The essence of the invention consists in that the luminescent probe consists of a light-gray box provided with a pressure plate, above which a distance pertinax plate is fixed on the middle and a sheet metal plate for insertion into the primary tube of the X-ray tube and below which a deflector is mounted, consisting of a wedge-shaped hotel, into which two holes are drilled perpendicularly to each other, wherein a first lens fixed by a nylon ring is disposed in one opening and a second lens is placed in the second opening by a second nylon ring into which a cylindrical sleeve is provided, which is provided with a coaxial support in the bottom. a reflecting mirror which is attached to the wedge-shaped deflector body by a plate, wherein the photoresistor is connected by conductors to a cage mounted on the side plate. The present invention makes it possible, directly, in the simplest conditions of radio-diagnostic departments, to carry out any time-consuming control of the luminescence of the films by means of a luminescent probe which is connected to a commercially-produced light or brightness counter.

Ueranie sa prevádza priamo na pracovisku tak, že primárné rtg. žiarenie zo žiaričakupr. rontgenky je úzko vyclonené primárnou clonou, do ktorej je zasunutá vrchná částprítlačnej došky. Medzi přítlačnou došku a zapustenú časť krabice nad deflektor sa vložískúmaná rtg. folia. Vybudované luminiscenčně světlo pomocou otického deflektora - zrkadlaa systémom šošoviek je sústredená na merací fotoodpor. Rohtgenové žiarenie zrkadlom nieje odrazené, ale absorbovaná plechovým obalom krytu sondy. Úroveň napaťovej zložky jevedené 5 m dlhým káblom do komerčně vyráběného luxmetra alebo iného druhu jasomeru čiosvitometra. Hodnoty intenzity luminoscenčného světla sa odčítavajú na lineárnej stupnici0-200 Lx.Ueranie is transferred directly to the workplace so that the primary X-ray. radiation from a radiator. The X-ray tube is narrowly shielded by a primary screen into which the top part of the press-on dock is inserted. X-rays are inserted between the thrust plate and the recessed part of the box above the deflector. folia. Built-in luminescent light using an otic deflector - mirror and lens system is centered on the photoresistor. Mirror X-ray radiation is not reflected but absorbed by the sheet metal casing of the probe cover. The level of the voltage component is led by a 5 m long cable to a commercially manufactured luxmeter or other kind of brightness meter. The luminosity light intensity values are read on a linear 0-200 Lx scale.

Deflexia luminiscenčního světla od rtg. žlarenia pomocou zrkadla je nutná, inakhodnota luminiscenčného jasu by bola překrývaná aj registrovanou hodnotou rtg.· žiarénia,na ktoré sú fotoodpory a tedy aj CdS ovel'a citlivejšia ako na slabé modré luminiscenčněsvětlo. Preto je vlastný fotoodpor CdS ešte navýše tienený oloveným plechom. Foužitiesystému šošoviek je nutné preto, že intenzita luminiscenčného světla je rádovo tak nízká(10"2 Lx), že komerčně vyrábané luxmetre nie sú schopné ju registrovat.Deflection of luminescent light from X-ray. Glare using a mirror is necessary, otherwise the luminescence brightness would be overlapped by the registered X-ray radiation, to which the photoresists and thus CdS are much more sensitive than to the weak blue luminescence light. That is why the CdS own photoresistor is even more shielded by lead metal. It is necessary to use the lens system because the luminescence light intensity is of the order of magnitude (10 2 Lx) that commercially manufactured luxmeters are not able to register it.

Systém dvoch spojných 10 dioptrických šošoviek sústredí emitované luminiscenčně světlovo svojom ohnisku, do ktorého je umiestnený merací fotoodpor. Bolo by možné aj riešeniebez šošoviek, potom však pripojenie sondy by muselo byť k fotonásobiču, přístrojů pod-statné zložitejšiemu a cenove nákladnéjšlemu. Doba odčítavania je maximálně 30 sekúnd.Celková doba merahia jednej fólie včetne vloženia do sondy netrvá viac ako 60 sekúnd.The system of two connected 10 diopter lenses concentrates emitted by the luminescence light of its focus into which the photoresistor is placed. It would also be possible to solve lenses, but then the probe connection would have to be more complicated and costly to the photomultiplier, the devices. The reading time is a maximum of 30 seconds. The total measurement time of one film, including insertion into the probe, does not last more than 60 seconds.

Na připojených výkresoch je znázorněné technické prevedenie krabice luminiscenčnějsondy a detaily podstaty vynálezu, kde sú na obr. 1 bokorysný pohlad na sondu, obr. 2 ρδ-dorysný pohled, obr. 3 bokorysný rez v rovině A-Á z obr. 2 a obr. 4 deflektor v pSdorysnompohlede, nárysnom pohl’ade a v bokorysnom řeze v rovině A-A'.BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings, there is shown a technical embodiment of a luminescent box and details of the subject matter of the invention, wherein FIG. 1 is a side elevational view of the probe; FIG. 2 is a plan view; FIG. 4 shows a deflector in a plan view, an elevation view and a side view in the plane A-A '.

Luminiscenčná sonda je vytvořená krabicou zo železných plechov skladajúca sa z přitlač-nej došky 2, na ktorej je upevněná distančná pertinaxová doštička J a plechová štvorcovádoštička i, ktoré sa vsúva do primárnej clony rontgenky. Spodná časť krabice sondy jeThe luminescent probe is formed by an iron sheet box consisting of a pressure pad 2, on which a pertinax plate J and a sheet metal plate 1, which is inserted into the primary tube of the x-ray tube, are fixed. The bottom of the probe box is

Claims

3, 233201 formed by an angled side plate 14 to which the bottom panels 12 and the top plate 2 as well as the L profile 2, to which the pressure plate 2 engages, are fastened by screws 8 and 13, respectively. The deflector 1 is fastened with a screw! on the underside of the top plate 2 · The openings in the plate 4 and top plate 2 are identical. The deflector is formed from a reinforced PVC body 24 into which two holes are drilled perpendicular to each other. A first slider 11 is mounted in one aperture fixed by a nylon ring 23. The second slider 25 disposed in the second aperture is sealed with a more massive ring 26 into which a cylindrical hollow carriage 2 is inserted, which is a photoresistor holder 21. The luminescent light is reflected by the mirror 22 which is fixed to the deflector body 24 by a plate 28 of the ureubaai 17. The sheet metal box 1 itself serves to light seal and pressurize the tube. reinforcement film. Primary X-ray. irradiation with a mirror 12 or with a lens H, 15 is not captured, whereas a built-in luminescent light of the intensifying films is mirrored by the mirror 12, respectively. deflected and goose 11, 15 from the irradiated area concentrated in the focus of the second lens 15 on the diameter of the photoresist surface 21. which, according to the intensity of the luminescence light generated, alters the level of its resistance, which is registered by the commercial luminaire, e.g. Accurate measurement of luminescence emissivity gives the possibility! fast detection efficiency of X-rays. foil, and adjust the necessary exposure values in the scan to avoid overexposure or underexposure and thus unnecessary repetition and exposure to increased X-ray doses. radiation. Navlec gives the possibility of determining whether the film is capable of operation or must be discarded. The cost of foils is high and thus economical. BACKGROUND OF THE INVENTION A luminescent probe for direct measurement of the amplification effect of x-ray films, characterized in that it comprises a light-proof box (1) provided with a pressure plate (2) fixed at the center by a distance pertinax plate. (3) and, on the other hand, a sheet metal tray (4) for insertion into the primary screen of the X-ray tube, below which is a centrally mounted deflector consisting of a wedge-shaped body (24) into which two holes are drilled perpendicular to each other, in which a first lens C11 is disposed in one opening ) fixed by a nylon ring (23) and a second screw (25) mounted in the second opening secured by a second ring (26), into which a cylindrical housing (19) provided with a photoresistor (21) and in the hole axis of the holes is inserted a reflector (22) is provided which is fixed to the wedge-shaped body by a baffle plate (28), wherein the photoresistor (21) is connected by conductors (31) to a drawing board (30) placed on the side panel (14) 4 drawings