Enum: MRISequenceTypeEnum

MRI pulse sequence types

Permissible Values

Value	Meaning	Description
GRADIENT_ECHO	NCIT:C154542	Fast imaging sequence using gradient reversal
SPIN_ECHO	CHMO:0001868	Sequence using 180-degree refocusing pulse
EPI	NCIT:C17558	Ultrafast imaging sequence
MPRAGE	NCIT:C118462	T1-weighted 3D sequence with preparation pulse
SPACE	None	3D turbo spin echo sequence
TRUFI	NCIT:C200534	Balanced steady-state free precession sequence

Slots

Name	Description
mri_sequence_type	MRI pulse sequence type

Identifier and Mapping Information

Schema Source

from schema: https://w3id.org/linkml/valuesets

LinkML Source

name: MRISequenceTypeEnum
description: MRI pulse sequence types
from_schema: https://w3id.org/linkml/valuesets
rank: 1000
permissible_values:
  GRADIENT_ECHO:
    text: GRADIENT_ECHO
    description: Fast imaging sequence using gradient reversal
    meaning: NCIT:C154542
    annotations:
      speed:
        tag: speed
        value: fast
      typical_use:
        tag: typical_use
        value: T2*, functional imaging
      artifact_sensitivity:
        tag: artifact_sensitivity
        value: susceptible to magnetic field inhomogeneity
    title: Gradient echo sequence
    aliases:
    - Gradient Echo MRI
  SPIN_ECHO:
    text: SPIN_ECHO
    description: Sequence using 180-degree refocusing pulse
    meaning: CHMO:0001868
    annotations:
      speed:
        tag: speed
        value: slower
      typical_use:
        tag: typical_use
        value: T2 imaging, reduced artifacts
      artifact_resistance:
        tag: artifact_resistance
        value: good
    title: Spin echo sequence
    aliases:
    - spin echo pulse sequence
  EPI:
    text: EPI
    description: Ultrafast imaging sequence
    meaning: NCIT:C17558
    annotations:
      speed:
        tag: speed
        value: very fast
      typical_use:
        tag: typical_use
        value: functional MRI, diffusion imaging
      temporal_resolution:
        tag: temporal_resolution
        value: subsecond
    title: Echo planar imaging
  MPRAGE:
    text: MPRAGE
    description: T1-weighted 3D sequence with preparation pulse
    meaning: NCIT:C118462
    annotations:
      image_type:
        tag: image_type
        value: T1-weighted
      typical_use:
        tag: typical_use
        value: high-resolution anatomical imaging
      dimension:
        tag: dimension
        value: 3D
    title: Magnetization prepared rapid gradient echo
    aliases:
    - Magnetization-Prepared Rapid Gradient Echo MRI
  SPACE:
    text: SPACE
    description: 3D turbo spin echo sequence
    annotations:
      image_type:
        tag: image_type
        value: T2-weighted
      typical_use:
        tag: typical_use
        value: high-resolution T2 imaging
      dimension:
        tag: dimension
        value: 3D
    title: Sampling perfection with application optimized contrasts
  TRUFI:
    text: TRUFI
    description: Balanced steady-state free precession sequence
    meaning: NCIT:C200534
    annotations:
      contrast:
        tag: contrast
        value: mixed T1/T2
      typical_use:
        tag: typical_use
        value: cardiac imaging, fast scanning
      signal:
        tag: signal
        value: high
    title: True fast imaging with steady-state precession
    aliases:
    - Constructive Interference In Steady State