Operating Manual

ManualsBrandsGE ManualsDigital X-rayGE DXR250 Detector

175174

Figure 39-16 shows a detail of the

selected pipe wall area with the

reported results.

This example of a valve with a

great variety of wall thicknesses

also shows one of the strengths of

a digital exposure. If needed the

same image can be used to study

the thin and thick wall parts of the

valve thanks to the large dynamic

range contained in the image.

Archiving and reliability of images

Archiving can be done on almost all existing professional mass storage facilities, e.g.

CD-ROM (~700 MB), double layer DVD (~10 GB), double layer HD-DVD (~30 GB),

double layer blu (blue) ray disk (~50 GB) or hard disk.

In the not too distant future other high capacity optical solutions such as holographic disk

technology (~300 GB) will become available.

Such mass memories are needed to be able to store a number of high resolution digital

images A single image of a ~ 400 x 400 mm panel with a pixel size of 50 microns requires

120 Mb (position and up to16 bit of density data). A pixel size of 100 micron needs “only” 30 MB.

Integrity-procedures should be applied to prohibit manipulation or even forgery of digital

images. To exclude such tampering with images, it is part of the data handling protocol to

always include the original unprocessed data with the processed data set (images), see sec-

tion 16.9.

Although attractive to save memory space, it is impossible to compress the original umpro-

cessed data. However, for reporting purposes, algorithms such as JPEG, are in use to redu-

ce file sizes of processed images and for printing .

Exchange of data

The workstation can also transfer images electronically over great distances (through

internet, intranet or wireless), which can be viewed, interpreted or stored by remote

users on identical satellite workstations.

This way information is sent to the experts rather than sending the experts to the

information. Because the images are digital, multiple copies of the images are always

identical. These capabilities are driving the latest trends of enhanced database capabilities

and common workstation standards for digital radiography software.

Figure 40-16 shows a block diagram of the various components that make up a complete

system for digital radiography.

Fig. 39-16. Detail of pipe wall of figure 38-16 with report

Wall Thickness Result

Nr. Material D

Soll

Ist

1 Steel 3,5 3,5

2 3,5 1,3

Wireless

transmission

DR- panel

Printer

Storage/