TōmōRAD Technology  
         
Computed Radiography workstation
Digital Light-Box®
ALLPRO scanner – PSP scanner
Aspen Aerogels – heat shields
Phosphor Storage Plates - PSPs
Display screen
Processor/Computer selection
 
 
TōmōRAD Computed Radiography workstation
 

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Digital Light-Box ®
 
Overview
‘State-of-the-art’ viewer software
Allows image manipulation eg magnification/zoom
Configurable GUI/simple intuitive interface
Allows adjustment of brightness, contrast etc
Compatible with a variety of input devices/controllers
Digital interpretation of defects
Built-in PSP QC function – increases working life of plates
Can be used to ‘stitch’ images (one-file-per-weld)
Depth/height of flaws using source-shift (parallax) (See animation)
Access control for cross-check or interpreter qualification



More to come soon

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ALLPRO scanner – PSP scanner
 
Phosphor plate scanners are available as either flat-bed or drum-type from several manufacturers.
While a flat-bed is easier and quicker to use TōmōRAD have selected a drum-type manufactured by Allpro Imaging, NY
The advantages of a drum-type scanner are:
less moving parts, improved reliability
more robust, can easily be shipped
smaller form factor
generally gives higher resolution.
TōmōRAD are authorised distributors for ALLPRO Imaging.
Scanner resolution
18+ lp/mm (vertical)
12-14 lp/mm (horizontal)
PSP resolution - 5.5-6 lp/mm or 12 pixels/mm
Pixel depth - 12 bits/4,096 gray shades
Scan-cycle - 55 sec (approx)
Dimensions - 520 x 770 x 711 mm
Weight - 60 kg (including eraser)
Transport - ATA certified transit case
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Aspen Aerogels – heat shields
 
To reduce cycle times, while protecting the PSPs, TōmōRAD working with Aspen Aerogels, Ma have developed a high performance welding heat-shield.
The heat-shields consist of a high-temperature silicone coated Aerogel which is durable and capable of withstanding temperatures up to 650°C (1,200°F) without damaging the PSP.

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Phosphor Storage Plates - PSPs
 
Following scanning the PSPs must be erased by scanning with high-intensity white light prior to re-use (> 1000 times)
Eraser characteristics
light output - 25,000 lux
erase cycle time - 35 sec
weight - 5.45 kg (12 lbs)

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Display screen
 

Correct screen selection is essential for interpretation of digital radiographs. Recommended screen format is summarised below:

19-inch or larger
resolution 1600 x 1200 @ 60 Hz, 24-bit colour (16.7M colours)
pixel pitch 0.27mm (H) x 0.27mm (V)
wide format preferred (WXGA)
contrast-ratio >600:1 (the basic determinant for discernability of anomalies)
brightness > 200 cd/m2, Greyscale, µ = 2.2
coated-glass, resistant to scratching
cleaned regularly with approved solvent.

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Processor/Computer selection
 

Digital images of welds can be large files which require a high-specification computer to manipulate and analyse. The recommended configurations, depending upon usage, are given below:

Main Computer Minimum Preferred
Processor, clockspeed Pentium IV, 1.4 GHz Pentium IV, >3.3 GHz
Memory 1 GB DRAMMs >2 GB DRAMMs
Operating system Windows XP Professional
Communications None T3 network connection
Internal HDD 60 GB 2 x 200 GB serial ATA
Internal DVD Combo CD-RW DVD RW 24x
Power supply 350 W + supplementary cooling
Misc Small-form factor preferred (eg Shuttle, Voodoo)
Input devices Wireless keyboard/mouse,
Griffin – PowerMate,
Digitising tablet (optional)

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