Duplex IQI EN462-5

Duplex IQI

The Duplex IQI is used in many X-ray applications, especially in digital X-ray. Designed for evaluating total image unsharpness of film and additionally basic spatial resolution of digital images according to EN 13068 (Radioscopy), EN 14784 and ISO 13671

CR – Computed Radiography with imaging plates), ISO 17636-2 (digital radiology of welds – flat panel detectors) or ASTM E 2597 (characterization of digital detector arrays). A new ISO standard is in preparation, describing the possibility of using the Duplex IQI for determination of focal spot size of X-ray tubes.

Image valuation with Duplex Wire Type IQI

In radiography the wire pair with largest diameter d has to be identified, which cannot be separated visually.

The radiographic film may be magnified up to 4X.

In digital radiology the separation between wires (Dip) is evaluated. The wire pair with largest d, showing Dip less than 20 percent of the wire pair contrast, identifies total image unsharpness (U = 2d) and basic spatial resolution (SRb = d) of digital image.

Scope of supply:

Duplex Wire Type IQI in wooden box with Instructions,

Declaration of Conformity according to ISO/IEC 17050-1 and individual Test Certificate according to ASTM E 2002, ISO 19232-5 with all relevant measurements

Duplex IQI EN462-5

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  • Duplex IQI consists of 13 or 15 wire pairs from 1D to 13D or 15D
  • Material for wires 1D to 3D is tungsten and forwires 4D to 15D is platinum
  • Distance between wires of each wire pair equals exactly diameter of wires
  • Wires are casted in a transparent, resistant and dimensional stable plastic
  • Standard and serial number are indelible casted and shown on each image
  • Design-type test for Duplex IQI is in process at BAM / Berlin
DD UT (mm) SRb (mm) LP (1/mm) D (mm)
D1 1,600 0,800 0,625 0,800
D2 1,260 0,630 0,790 0,630
D3 1,000 0,500 1,000 0,500
D4 0,800 0,400 1,250 0,400
D5 0,640 0,320 1,560 0,320
D6 0,500 0,250 2,000 0,250
D7 0,400 0,200 2,500 0,200
D8 0,320 0,160 3,130 0,160
D9 0,260 0,130 3,850 0,130
D10 0,200 0,100 5,000 0,100
D11 0,160 0,080 6,250 0,800
D12 0,130 0,063 7,690 0,063
D13 0,100 0,050 10,000 0,050
D14 0,080 0,040 12,500 0,040
D15 0.064 0,032 15,600 0,032

DD       Duplex Wire Number

UT        Corresponding Unsharpness

SRb      Corresponding Basic Spatial Resolution

LP        Corresponding Line Pair Value

d          Wire Diameter and Spacing