Duplex IQI

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Description

Duplex IQI Product information

The Duplex IQI is used in many X-ray applications, especially in digital x-ray. Designed for evaluating total image unsharpness of films and additionally basic spatial resolution of digital images according to EN 13068 (Radioscopy), EN 14784 and ISO 16371 (CR – Computed Radiography with imaging plates), ISO 17636-2 (Digital Radiography of welds – flat panel detectors) or ASTM E 2597 (characterisation of digital detector arrays) and ASTM E2737 (DR – Duplex Plate Phantom). ASTM E 2903 describes the Duplex Wire Type IQI application for focal spot size measurements of micro focus 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.

Specification:

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	0.080
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

• Duplex IQI consists of 13 or 15 wire pairs from 1D to 13D or 15D
• material for wires 1D to 3D is tungsten and for wires 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

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Additional information

Option	EN 462-5 (13 wires), EN 462-5 (15 wires)