to the WORLD of CRYSTALS
Roentgenophosphors
Print this frame

Roentgenophosphors

Roentgenophosphors convert X-ray radiation into visible light with spectrum matched to spectral response of roentgenographic films. Offered roentgenophosphors provide the possibility to manufacture diverse intensifying screens for medical and industrial radiography (roentgenology, defectoscopy) and the possibility of optimum choice with taking into account radiological safety of a patient.
   The described roentgenophosphors can be used within the temperature range from -50°C to +85°C and relative humidity of up to 80%.

Technical data:

Properties of phosphor R420-1  
Chemical formula
CaWO4
Wavelength of emission peak, nm
420
Average particle size, um
4 - 7
Afterglow
lower than threshold sensitivity of nonsensitized X-ray films
Three types of screens with phosphor R420-1
I
II
III
Intensifying or photographic action (speed of survey), arb. units
50
100
200
Modulation transfer function at spatial frequency 2 line pair/mm
0,60
0,35
0,30
Resolution (sharpness, definition), arb. units
100
80
70
General screen characteristics High definition and contrast of image Optimum ratio between speed of survey and definition The highest speed, short exposition time
Object quality on diagnostic photos:  
   -excellent Skeleton peripheral sections Jaw-facial section of scull, thorax See screen II, and also lumbar-sacrum section
   -good Jaw-facial section of scull, thorax Skeleton peripheral sections, alimentary canal, kinds of radiography Urinary organs, thorax, blood-circulating system

I N Q U I R Y    F O R M :

Material:
Quantity : kg
Application:
 
This field is for additional information, comments, add. requirements etc.
Name:
Tel-No: 
Fax:
E-Mail:
Your company name and address:
Cancel