IR

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Ir

The symbol for iridium.

IR

abbr.
1. information retrieval
2. infrared
3. Sports injured reserve
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ir

the internet domain name for
(Computer Science) Iran

Ir

the chemical symbol for
(Elements & Compounds) iridium

IR

abbreviation for
1. (General Physics) infrared
2. (Government, Politics & Diplomacy) (formerly, in Britain) Inland Revenue
3. (Government, Politics & Diplomacy) Iran (international car registration)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

IR

infrared.

Ir

Irish.

Ir


Chem. Symbol.
iridium.

ir-1

,
var. of in- 2 (by assimilation) before r: irradiate.

ir-2

,
var. of in- 3 (by assimilation) before r: irreducible.

Ir.

Ireland.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Ir

The symbol for iridium.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.IR - a heavy brittle metallic element of the platinum groupIr - a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
2.IR - a board of the British government that administers and collects major direct taxes
administrative body, administrative unit - a unit with administrative responsibilities
Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Fat-suppressed techniques are highly useful, and optimal fat suppression is achieved with spectral adiabatic inversion recovery (SPAIR).
Magnetic resonance imaging of the brain with fluid-attenuated inversion recovery sequences showed bilateral, multiple ill-defined foci of abnormal signal intensity involving the parietal and insular regions, some showing cystic centers.
Secondary objectives included determining the diagnostic performance of 18F-fluciclovine PET and MRI compared with various types of MRI: CE-T1W MRI alone; fluid-attenuated inversion recovery (or T2-weighted MRI) alone; and FLAIR (or T2W) MRI and CE-T1W MRI in combination.
The following techniques have been used to enhance the dark blood effect and to have a better visualization of lumen and vessel wall of the arteries: saturation band (14), double inversion recovery (DIR) (15), quadruple inversion recovery (QIR) (16), motion-sensitized driven-equilibrium (MSDE) (17), and delay alternating with nutation for tailored excitation (DANTE) (18), each method with its merits and shortcomings.
Sixty-five patients underwent serial isotropic 3-dimension fluid-attenuated inversion recovery sequence imaging (162 images) as well as transcranial and extracranial color-coded sonography.
The standardized protocols consist of the following scanning sequences: sagittal T1-weighted spin echo, axial T2-weighted fast spin echo, coronal oblique fast fluid-attenuated inversion recovery, coronal oblique fast multiplanar inversion recovery, axial diffusion (single-shot, spin echo planar), b = 1000, all directions), and axial three-dimensional spoiled gradient recalled echo.
Magnetic resonance imaging reveals a large right frontal area of increased signal on fluid-attenuated inversion recovery (FLAIR), which does not enhance on postcontrast imaging (Fig l).
The Galan 3T XGO Edition also delivers enhanced cardiac capabilities, including T1 mapping that utilizes MOdified Look-Locker Inversion recovery (MOLLI) sequence and allows providers to acquire a more quantitative characterization of myocardial tissue within a single breath hold.
* Arterial and venous infarction both can present with hypo- and hyper-intensity on T1- and T2-weighted images respectively; however, DWI and fluid-attenuated inversion recovery (FLAIR) sequences can differentiate the two.
The mass-like lesion was hyperintense on T2-weighted images and fluid-attenuated inversion recovery images (Figure, panel C).
Caption: Figure 1: Magnitude reconstructed inversion recovery image of MRI Tl-weighted imaging depicting linear delayed hyper-enhancement involving the midmyocardium of the distal septum.