20 lines
1.3 KiB
Markdown
20 lines
1.3 KiB
Markdown
---
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title: "AIR (program)"
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chunk: 1/1
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source: "https://en.wikipedia.org/wiki/AIR_(program)"
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category: "reference"
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tags: "science, encyclopedia"
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date_saved: "2026-05-05T12:13:02.939111+00:00"
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instance: "kb-cron"
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---
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The AIR (Automated Image Registration) is a program suite for volume-based image registration constructed by Roger P. Woods from UCLA School of Medicine.
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It reads and writes Analyze volume files and can work with 4x4 transformation matrices stored in its own file format with the filename extension .air.
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It is especially designed for neuroimaging applications and has primarily been used in research-oriented functional neuroimaging with brain scans from positron emission tomography and magnetic resonance scanners.
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The suite provides a number of programs for image registration with different transformation models, such as rigid-body, affine and nonlinear warping.
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For example, for affine transformation the registration from one brain scan to another may be found with the alignlinear program and written to the special air-file that stores the transformation matrix.
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The transformation may be inverted with the invert_air program and the volume may finally be resliced and interpolated with the reslice program.
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== External links ==
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Automated Image Registration — homepage for the fifth version of the program suite |