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symbol for the element iridiumiridium
, metallic chemical element; symbol Ir; at. no. 77; at. wt. 192.217; m.p. about 2,410°C;; b.p. about 4,130°C;; sp. gr. 22.55 at 20°C;; valence +3 or +4.
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Abbrev. for infrared.




Abbr. for “inside radius.”






The country code for Iran.


(1) (Industry Remarketer) See VAR and VAD.

(2) See infrared, IR detector and IrDA.

(3) See information resources.
References in periodicals archive ?
The most common technique error that prompted a retake for both direct and PSP receptors was image receptor misplacement for bitewings and inadequate coverage of the apical area for periapical images.
Forensic oral imaging quality of handheld dental X-ray devices: Comparison of two image receptors and two devices.
Although an automatic collimation system reduces the radiation field size to the dimensions of the image receptor, many pediatric patients are significantly smaller than the image receptor, resulting in the need for additional manual adjustment of collimation.
Conventional radiography using film as an image receptor will be obsolete and replaced by digital imaging.
As radiology departments move into the digital age, the cassette and screen-film combination often is replaced by an imaging plate held in an image receptor that is similar in appearance to a regular cassette.
In digital imaging, the cassette is replaced by an electronic detector system called the image receptor.
The equipment should be designed and maintained so that the primary beam is confined to the image receptor.
Though contrary to most radiographers' instincts, placing the object (ie, valve marker) farther from the image receptor magnifies the pressure indicator and makes the pressure interpretation easier.
The patient stands facing the image receptor with the edge of the film cassette firmly against the chest wall.
Facilities must ensure that the x-ray field in all mammography systems extends to or beyond the edge of the image receptor.
A variety of filter shapes are used;[1-9] the filter shape usually is dependent on different image receptor systems, part positions and exposure factors.