Enum: ImageQualityMetricEnum

Metrics computed during image quality and pixel data validation to document that images are readable and of adequate fidelity for AI applications. Simple metrics can be extended to check conformance with FDA technical performance guidance for quantitative imaging devices where applicable.

URI: valuesets:ImageQualityMetricEnum

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Permissible Values

Value	Title	Meaning	Description
PIXEL_READABILITY	Pixel readability		Whether the pixel array can be decoded without error
INTENSITY_HISTOGRAM	Intensity histogram		Distribution of pixel intensities, checked for extreme outliers, clipping or empty images
SIGNAL_TO_NOISE_RATIO	Signal to Noise Ratio	NCIT:C94983	Ratio of signal in a region of interest to the standard deviation of background noise
CONTRAST_TO_NOISE_RATIO	Contrast to noise ratio		Difference in signal between two regions relative to background noise
SHARPNESS	Sharpness		Measure of edge definition or high-frequency content, such as Laplacian variance
BIT_DEPTH	Bit depth		Number of bits per pixel stored and allocated, checked for consistency after decompression
PIXEL_SPACING	Pixel spacing		Physical distance between pixel centres, checked for presence and plausibility
SLICE_THICKNESS	Slice thickness		Nominal thickness of each slice in a volumetric acquisition, checked for presence and plausibility
COMPRESSION_FIDELITY	Compression fidelity		Agreement between compressed and original pixel data, for example comparing a JPEG-compressed instance with its uncompressed source
ARTIFACT_PRESENCE	Artifact presence		Detection of motion, metal, aliasing or other acquisition artifacts

Slots

Name	Description
image_quality_metric	A metric computed to assess image pixel data quality

Identifier and Mapping Information

Schema Source

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

LinkML Source

name: ImageQualityMetricEnum
instantiates:
- valuesets_meta:ValueSetEnumDefinition
description: Metrics computed during image quality and pixel data validation to document
  that images are readable and of adequate fidelity for AI applications. Simple metrics
  can be extended to check conformance with FDA technical performance guidance for
  quantitative imaging devices where applicable.
title: Image Quality Metric
from_schema: https://w3id.org/valuesets
contributors:
- orcid:0000-0002-6601-2165
- https://github.com/anthropics/claude-code
status: DRAFT
rank: 1000
permissible_values:
  PIXEL_READABILITY:
    text: PIXEL_READABILITY
    description: Whether the pixel array can be decoded without error
    title: Pixel readability
  INTENSITY_HISTOGRAM:
    text: INTENSITY_HISTOGRAM
    description: Distribution of pixel intensities, checked for extreme outliers,
      clipping or empty images
    title: Intensity histogram
  SIGNAL_TO_NOISE_RATIO:
    text: SIGNAL_TO_NOISE_RATIO
    description: Ratio of signal in a region of interest to the standard deviation
      of background noise
    meaning: NCIT:C94983
    title: Signal to Noise Ratio
    aliases:
    - SNR
  CONTRAST_TO_NOISE_RATIO:
    text: CONTRAST_TO_NOISE_RATIO
    description: Difference in signal between two regions relative to background noise
    title: Contrast to noise ratio
    aliases:
    - CNR
  SHARPNESS:
    text: SHARPNESS
    description: Measure of edge definition or high-frequency content, such as Laplacian
      variance
    title: Sharpness
  BIT_DEPTH:
    text: BIT_DEPTH
    description: Number of bits per pixel stored and allocated, checked for consistency
      after decompression
    title: Bit depth
  PIXEL_SPACING:
    text: PIXEL_SPACING
    description: Physical distance between pixel centres, checked for presence and
      plausibility
    title: Pixel spacing
  SLICE_THICKNESS:
    text: SLICE_THICKNESS
    description: Nominal thickness of each slice in a volumetric acquisition, checked
      for presence and plausibility
    title: Slice thickness
  COMPRESSION_FIDELITY:
    text: COMPRESSION_FIDELITY
    description: Agreement between compressed and original pixel data, for example
      comparing a JPEG-compressed instance with its uncompressed source
    title: Compression fidelity
  ARTIFACT_PRESENCE:
    text: ARTIFACT_PRESENCE
    description: Detection of motion, metal, aliasing or other acquisition artifacts
    title: Artifact presence