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Neuroimaging Services Glossary

100 terms total — 24 showing — Last updated 15 Sep 2026

isotropic voxels

Intermediate Technical IVT

Three-dimensional image elements with equal dimensions in all spatial directions, enabling accurate volumetric measurements.

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neurite orientation dispersion

Professional Technical

Advanced diffusion MRI parameter that quantifies the angular variation of neurites within a voxel, providing microstruct...

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neurofeedback protocol

Intermediate Technical IVT

A standardized procedure using real-time neuroimaging feedback to train patients to modulate their brain activity patter...

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neuroplasticity mapping

Advanced Technical IVT

The use of neuroimaging techniques to track changes in brain structure and function over time, particularly following in...

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neurovascular coupling

Advanced Technical IVT

The physiological relationship between neural activity and local cerebral blood flow changes that underlies functional n...

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normalization

Intermediate Technical IVT

Spatial transformation process that aligns individual brain images to a standard anatomical template or coordinate syste...

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Nyquist ghost

Advanced Technical IVT

MRI artifact appearing as displaced duplicate image due to phase inconsistencies in EPI sequences.

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PACS integration

Professional Technical

Seamless connectivity between neuroimaging systems and Picture Archiving and Communication Systems for data management.

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parallel imaging

Advanced Technical IVT

MRI acceleration technique using multiple receiver coils to reduce scan time while maintaining image quality.

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penumbra

Intermediate Technical IVT

In stroke imaging, brain tissue that is hypoperfused but not yet irreversibly damaged, representing potentially salvagea...

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perfusion deficit

Intermediate Technical IVT

Abnormal reduction in cerebral blood flow detected through perfusion imaging techniques.

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perfusion-weighted imaging

Intermediate Technical IVT

MRI technique that measures cerebral blood flow and volume, essential for assessing tissue viability in stroke and tumor...

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perivascular spaces

Intermediate Technical IVT

Fluid-filled spaces surrounding blood vessels in the brain, appearing as punctate hyperintensities on T2-weighted images...

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phase encoding direction

Advanced Technical IVT

Spatial encoding axis in MRI that determines the direction of motion artifacts and distortion patterns.

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phase unwrapping

Professional Technical

A post-processing technique to remove 2π discontinuities in phase images, recovering true phase values across the image.

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phase-contrast MRI

Advanced Technical IVT

An MRI technique that measures tissue motion and flow by detecting phase shifts in the magnetic resonance signal.

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post-contrast enhancement

Intermediate Technical IVT

Increased signal intensity in tissues following intravenous contrast agent administration.

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preprocessing pipeline

Advanced Technical IVT

Standardized sequence of computational steps applied to raw neuroimaging data before statistical analysis.

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An ASL technique using radiofrequency pulses to label arterial blood water as an endogenous tracer for cerebral perfusio...

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radiological coordinate system

Intermediate Technical

Standardized three-dimensional reference frame used for consistent anatomical localization and image orientation in neur...

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radiology information system

Intermediate Technical IVT

Software platform managing neuroimaging workflow, scheduling, reporting, and data distribution.

RIS
Technical Term Full entry →

radiomics

Advanced Technical IVT

High-throughput extraction and analysis of quantitative imaging features to support clinical decision-making.

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readout direction

Professional Technical

Spatial axis along which MRI signal frequency encoding occurs during image acquisition, determining distortion character...

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readout gradient

Professional Technical

The magnetic field gradient applied during signal acquisition to spatially encode MRI data along the frequency-encoding...

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resting-state network

Advanced Technical IVT

Brain regions showing synchronized activity during task-free scanning periods.

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Showing 49–72 of 100

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