BOA Reference

Body-and-Organ-Analysis feature extraction, radiomics, experimental aortic calcification, and visual collages.

For workflow context, see BOA module guide.

Functions And Classes

fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_aortic_calcification_features
fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_cohort_aortic_calcification_features
fyron.boa_extraction.features.discover_boa_cases
fyron.boa_extraction.features.extract_boa_features
fyron.boa_extraction.features.extract_body_region_features
fyron.boa_extraction.features.extract_cohort_body_region_features
fyron.boa_extraction.features.extract_cohort_total_features
fyron.boa_extraction.features.extract_total_segmentation_features
fyron.boa_extraction.features.read_json_file
fyron.boa_radiomics.features.discover_boa_radiomics_cases
fyron.boa_radiomics.features.extract_boa_radiomics_features
fyron.boa_radiomics.features.extract_case_radiomics_features
fyron.visualization.boa.create_boa_segmentation_collage
fyron.visualization.curate_previews.PreviewSource
fyron.visualization.curate_previews.discover_preview_sources
fyron.visualization.curate_previews.prepare_curate_image_previews
fyron.visualization.volume_difference.plot_volume_difference_heatmap

`fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_aortic_calcification_features`

Extract experimental aortic calcification burden from BOA-style masks.

Import path: fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_aortic_calcification_features

python

extract_experimental_aortic_calcification_features(case_folder_or_masks_dir: str | Path, *, ct_path: str | Path | None = None, masks_dir: str | Path | None = None, download_id: str | None = None, hu_threshold: float = 130.0, prefix: str = 'aortic_calcification', aorta_mask_filenames: str | Sequence[str] = DEFAULT_AORTA_MASK_FILENAMES, total_mask_filenames: str | Sequence[str] = DEFAULT_TOTAL_MASK_FILENAMES, total_aorta_labels: Sequence[int] = DEFAULT_TOTAL_AORTA_LABELS, thoracic_mask_filename: str = 'thoracic_cavity.nii.gz', abdominal_mask_filename: str = 'abdominal_cavity.nii.gz', body_region_mask_filename: str = DEFAULT_BODY_REGION_MASK_FILENAME, body_region_labels: Mapping[str, int] | None = DEFAULT_BODY_REGION_LABELS, iliac_glob: str = '*iliac*.nii.gz', include_iliac: bool = True, missing_value: float | None = np.nan) -> dict[str, Any] | None

Parameters

Parameter	Required	Type	Default	Description
`case_folder_or_masks_dir`	yes	`str or Path`		Patient folder or mask folder.
`ct_path`	no	`str or Path or None`	`None`	CT NIfTI in Hounsfield units. If omitted, common filenames are searched in the case folder.
`masks_dir`	no	`str or Path or None`	`None`	Folder containing BOA masks. Defaults to ``case_folder_or_masks_dir``.
`download_id`	no	`str or None`	`None`	Optional explicit case identifier. Defaults to the folder name.
`hu_threshold`	no	`float`	`130.0`	Voxels inside the vascular mask with HU >= this value are counted as calcification.
`prefix`	no	`str`	`'aortic_calcification'`	Prefix for all generated feature columns.
`aorta_mask_filenames`	no	`str or Sequence[str]`	`DEFAULT_AORTA_MASK_FILENAMES`	Binary aorta mask filenames to try first.
`total_mask_filenames`	no	`str or Sequence[str]`	`DEFAULT_TOTAL_MASK_FILENAMES`	Fallback multiclass total segmentation filenames.
`total_aorta_labels`	no	`Sequence[int]`	`DEFAULT_TOTAL_AORTA_LABELS`	Label values counted as aorta in ``total.nii.gz. Defaults to` `52`` and should be verified against the local label map.
`thoracic_mask_filename`	no	`str`	`'thoracic_cavity.nii.gz'`	See signature.
`abdominal_mask_filename`	no	`str`	`'abdominal_cavity.nii.gz'`	Optional binary body-region masks used to split the aorta.
`body_region_mask_filename`	no	`str`	`DEFAULT_BODY_REGION_MASK_FILENAME`	Optional multiclass body-region mask fallback.
`body_region_labels`	no	`Mapping[str, int] or None`	`DEFAULT_BODY_REGION_LABELS`	Mapping of output region names to labels in ``body_region_mask_filename``.
`iliac_glob`	no	`str`	`'iliac.nii.gz'`	Glob used to discover iliac masks for aortoiliac burden.
`include_iliac`	no	`bool`	`True`	Whether to include iliac-extension and total-aortoiliac features.
`missing_value`	no	`float or None`	`np.nan`	Value used for unavailable optional regions.

Returns

dict or None - One flat feature row, or `None` when CT/aorta inputs are unavailable.

See also: BOA module guide.

`fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_cohort_aortic_calcification_features`

Extract experimental aortic calcification features for many BOA cases.

Import path: fyron.boa_extraction.experimental_aortic_calcification.extract_experimental_cohort_aortic_calcification_features

python

extract_experimental_cohort_aortic_calcification_features(cohort_folder_or_cases: str | Path | Iterable[str | Path], *, num_workers: int = 1, show_progress: bool = True, **kwargs: Any) -> pd.DataFrame

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder_or_cases`	yes	`str or Path or Iterable[str or Path]`		See signature.
`num_workers`	no	`int`	`1`	See signature.
`show_progress`	no	`bool`	`True`	See signature.
`kwargs`	yes	`Any`		See signature.

Returns

pd.DataFrame

See also: BOA module guide.

`fyron.boa_extraction.features.discover_boa_cases`

Discover BOA patient folders below a cohort directory.

Import path: fyron.boa_extraction.features.discover_boa_cases

python

discover_boa_cases(cohort_folder: str | Path, *, measurement_filename: str = 'bca-measurements.json') -> list[Path]

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder`	yes	`str or Path`		Root folder containing patient subfolders such as ``patient0001``.
`measurement_filename`	no	`str`	`'bca-measurements.json'`	File used to identify completed BOA cases.

Returns

list[pathlib.Path] - Sorted patient folders that contain the measurement file.

See also: BOA module guide.

`fyron.boa_extraction.features.extract_boa_features`

Extract and merge available BOA feature families by `download_id`.

Import path: fyron.boa_extraction.features.extract_boa_features

python

extract_boa_features(cohort_folder_or_cases: str | Path | Iterable[str | Path], *, include_body_regions: bool = True, include_total: bool = True, num_workers: int = 1, show_progress: bool = True, body_region_kwargs: Mapping[str, Any] | None = None, total_kwargs: Mapping[str, Any] | None = None) -> pd.DataFrame

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder_or_cases`	yes	`str or Path or Iterable[str or Path]`		See signature.
`include_body_regions`	no	`bool`	`True`	See signature.
`include_total`	no	`bool`	`True`	See signature.
`num_workers`	no	`int`	`1`	See signature.
`show_progress`	no	`bool`	`True`	See signature.
`body_region_kwargs`	no	`Mapping[str, Any] or None`	`None`	See signature.
`total_kwargs`	no	`Mapping[str, Any] or None`	`None`	See signature.

Returns

pd.DataFrame

See also: BOA module guide.

`fyron.boa_extraction.features.extract_body_region_features`

Extract body-region tissue volumes and vertebral SMA features.

Import path: fyron.boa_extraction.features.extract_body_region_features

python

extract_body_region_features(case_folder_or_measurements: str | Path, *, body_regions: Sequence[str] = BODY_REGIONS, tissues: Sequence[str] = TISSUES, vertebrae: Sequence[str] = VERTEBRAE, measurement_filename: str = 'bca-measurements.json', sma_segmentation_filename: str | Sequence[str] = ('tissues.nii.gz', 'body-regions.nii.gz'), sma_label: int = 2, slice_levels: Sequence[str] = ('l3',), slice_tissue_labels: Mapping[str, int] | None = None, height_m: float | None = None, include_derived_markers: bool = True, derived_markers: Sequence[Mapping[str, Any]] = DEFAULT_BODY_REGION_DERIVED_MARKERS, download_id: str | None = None, include_sma: bool = True, missing_value: float | None = np.nan) -> dict[str, Any] | None

Parameters

Parameter	Required	Type	Default	Description
`case_folder_or_measurements`	yes	`str or Path`		Patient folder or path to ``bca-measurements.json``.
`body_regions`	no	`Sequence[str]`	`BODY_REGIONS`	Body-region keys expected in the BOA aggregated measurements.
`tissues`	no	`Sequence[str]`	`TISSUES`	Tissue keys read from ``measurements_no_extremities``.
`vertebrae`	no	`Sequence[str]`	`VERTEBRAE`	Vertebral level keys used to select the middle axial slice.
`measurement_filename`	no	`str`	`'bca-measurements.json'`	Measurement filename when a patient folder is passed.
`sma_segmentation_filename`	no	`str or Sequence[str]`	`('tissues.nii.gz', 'body-regions.nii.gz')`	Segmentation file used for skeletal muscle area calculation. Pass a sequence to try multiple filenames in order.
`sma_label`	no	`int`	`2`	Label value counted as muscle in ``sma_segmentation_filename``.
`slice_levels`	no	`Sequence[str]`	`('l3',)`	Vertebral levels used for richer axial area markers, e.g. ``("l3",)``.
`slice_tissue_labels`	no	`Mapping[str, int] or None`	`None`	Mapping from marker names to segmentation label values. Defaults to ``{"sma": 2, "imat": 4, "vat": 7, "sat": 8}``.
`height_m`	no	`float or None`	`None`	Optional patient height in meters. Area-based ``smi,` `imati,` `vati, and` `sati` `do not require height. When height is provided, additional` `*_cm2_per_m2`` columns are calculated.
`include_derived_markers`	no	`bool`	`True`	Calculate body-region volume ratios such as muscle/bone and IMAT/TAT.
`derived_markers`	no	`Sequence[Mapping[str, Any]]`	`DEFAULT_BODY_REGION_DERIVED_MARKERS`	Marker definitions with ``name,` `numerator,` `denominator, and optional` `regions`` keys.
`download_id`	no	`str or None`	`None`	Optional explicit case identifier. Defaults to the patient folder name.
`include_sma`	no	`bool`	`True`	Calculate ``<vertebra>_sma`` when the segmentation file is present.
`missing_value`	no	`float or None`	`np.nan`	Value used when a measurement key is missing.

Returns

dict or None - One row of features. `None` is returned when the JSON file is missing or malformed.

See also: BOA module guide.

`fyron.boa_extraction.features.extract_cohort_body_region_features`

Extract body-region features for all completed BOA cases in a cohort.

Import path: fyron.boa_extraction.features.extract_cohort_body_region_features

python

extract_cohort_body_region_features(cohort_folder_or_cases: str | Path | Iterable[str | Path], *, num_workers: int = 1, show_progress: bool = True, measurement_filename: str = 'bca-measurements.json', **kwargs: Any) -> pd.DataFrame

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder_or_cases`	yes	`str or Path or Iterable[str or Path]`		See signature.
`num_workers`	no	`int`	`1`	See signature.
`show_progress`	no	`bool`	`True`	See signature.
`measurement_filename`	no	`str`	`'bca-measurements.json'`	See signature.
`kwargs`	yes	`Any`		See signature.

Returns

pd.DataFrame

See also: BOA module guide.

`fyron.boa_extraction.features.extract_cohort_total_features`

Extract total-segmentation features for all BOA cases in a cohort.

Import path: fyron.boa_extraction.features.extract_cohort_total_features

python

extract_cohort_total_features(cohort_folder_or_cases: str | Path | Iterable[str | Path], *, num_workers: int = 1, show_progress: bool = True, measurement_filename: str = 'total-measurements.json', **kwargs: Any) -> pd.DataFrame

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder_or_cases`	yes	`str or Path or Iterable[str or Path]`		See signature.
`num_workers`	no	`int`	`1`	See signature.
`show_progress`	no	`bool`	`True`	See signature.
`measurement_filename`	no	`str`	`'total-measurements.json'`	See signature.
`kwargs`	yes	`Any`		See signature.

Returns

pd.DataFrame

See also: BOA module guide.

`fyron.boa_extraction.features.extract_total_segmentation_features`

Extract organ volume, HU, CNR, and ratio features from total measurements.

Import path: fyron.boa_extraction.features.extract_total_segmentation_features

python

extract_total_segmentation_features(case_folder: str | Path, *, labels: Mapping[str, int] = TOTAL_LABELS, ratios: Sequence[tuple[str, str]] = TOTAL_RATIOS, measurement_filename: str = 'total-measurements.json', download_id: str | None = None, round_digits: int | None = 2, missing_value: float | None = np.nan) -> dict[str, Any] | None

Parameters

Parameter	Required	Type	Default	Description
`case_folder`	yes	`str or Path`		Patient folder containing ``total-measurements.json``.
`labels`	no	`Mapping[str, int]`	`TOTAL_LABELS`	Organ labels to extract from ``segmentations.total``.
`ratios`	no	`Sequence[tuple[str, str]]`	`TOTAL_RATIOS`	Organ volume ratios to compute as ``organ_a / organ_b``.
`measurement_filename`	no	`str`	`'total-measurements.json'`	Total segmentation measurements filename.
`download_id`	no	`str or None`	`None`	Optional explicit case identifier. Defaults to the patient folder name.
`round_digits`	no	`int or None`	`2`	Number of digits used for rounded numeric features. Set to ``None`` to keep original precision.
`missing_value`	no	`float or None`	`np.nan`	Value used when a metric or organ is missing.

Returns

dict or None - One row of total-segmentation features, or `None` when no valid JSON is available.

See also: BOA module guide.

`fyron.boa_extraction.features.read_json_file`

Read a JSON file and return parsed content.

Import path: fyron.boa_extraction.features.read_json_file

python

read_json_file(file_path: str | Path) -> dict[str, Any] | list[Any]

Parameters

Parameter	Required	Type	Default	Description
`file_path`	yes	`str or Path`		JSON file path.

Returns

dict or list - Parsed JSON content.

See also: BOA module guide.

`fyron.boa_radiomics.features.discover_boa_radiomics_cases`

Discover BOA patient folders with a target segmentation file.

Import path: fyron.boa_radiomics.features.discover_boa_radiomics_cases

python

discover_boa_radiomics_cases(cohort_folder: str | Path, *, segmentation_filename: str | Path = 'total.nii.gz') -> list[Path]

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder`	yes	`str or Path`		See signature.
`segmentation_filename`	no	`str or Path`	`'total.nii.gz'`	See signature.

Returns

list[Path]

See also: BOA module guide.

`fyron.boa_radiomics.features.extract_boa_radiomics_features`

Extract BOA radiomics features for a cohort of patient folders.

Import path: fyron.boa_radiomics.features.extract_boa_radiomics_features

python

extract_boa_radiomics_features(cohort_folder_or_cases: str | Path | Iterable[str | Path], *, image_filename: str | Path | Sequence[str | Path] = DEFAULT_IMAGE_FILENAMES, segmentation_kind: SegmentationKind = 'total', segmentation_filename: str | Path | None = None, labels: Mapping[str, int] | Sequence[int] | None = None, extractor_settings: Mapping[str, Any] | None = None, feature_prefix: str = 'radiomics', include_paths: bool = True, exclude_diagnostics: bool = True, minimum_voxels: int = 1, resample_mask: bool = True, on_error: OnError = 'skip', num_workers: int = 1, show_progress: bool = True) -> pd.DataFrame

Parameters

Parameter	Required	Type	Default	Description
`cohort_folder_or_cases`	yes	`str or Path or Iterable[str or Path]`		See signature.
`image_filename`	no	`str or Path or Sequence[str or Path]`	`DEFAULT_IMAGE_FILENAMES`	See signature.
`segmentation_kind`	no	`SegmentationKind`	`'total'`	See signature.
`segmentation_filename`	no	`str or Path or None`	`None`	See signature.
`labels`	no	`Mapping[str, int] or Sequence[int] or None`	`None`	See signature.
`extractor_settings`	no	`Mapping[str, Any] or None`	`None`	See signature.
`feature_prefix`	no	`str`	`'radiomics'`	See signature.
`include_paths`	no	`bool`	`True`	See signature.
`exclude_diagnostics`	no	`bool`	`True`	See signature.
`minimum_voxels`	no	`int`	`1`	See signature.
`resample_mask`	no	`bool`	`True`	See signature.
`on_error`	no	`OnError`	`'skip'`	See signature.
`num_workers`	no	`int`	`1`	See signature.
`show_progress`	no	`bool`	`True`	See signature.

Returns

pd.DataFrame

See also: BOA module guide.

`fyron.boa_radiomics.features.extract_case_radiomics_features`

Extract PyRadiomics features for one BOA case folder.

Import path: fyron.boa_radiomics.features.extract_case_radiomics_features

python

extract_case_radiomics_features(case_folder: str | Path, *, image_filename: str | Path | Sequence[str | Path] = DEFAULT_IMAGE_FILENAMES, segmentation_kind: SegmentationKind = 'total', segmentation_filename: str | Path | None = None, labels: Mapping[str, int] | Sequence[int] | None = None, extractor: Any | None = None, extractor_settings: Mapping[str, Any] | None = None, feature_prefix: str = 'radiomics', download_id: str | None = None, include_paths: bool = True, exclude_diagnostics: bool = True, minimum_voxels: int = 1, resample_mask: bool = True, on_error: OnError = 'skip') -> dict[str, Any] | None

Parameters

Parameter	Required	Type	Default	Description
`case_folder`	yes	`str or Path`		See signature.
`image_filename`	no	`str or Path or Sequence[str or Path]`	`DEFAULT_IMAGE_FILENAMES`	See signature.
`segmentation_kind`	no	`SegmentationKind`	`'total'`	See signature.
`segmentation_filename`	no	`str or Path or None`	`None`	See signature.
`labels`	no	`Mapping[str, int] or Sequence[int] or None`	`None`	See signature.
`extractor`	no	`Any or None`	`None`	See signature.
`extractor_settings`	no	`Mapping[str, Any] or None`	`None`	See signature.
`feature_prefix`	no	`str`	`'radiomics'`	See signature.
`download_id`	no	`str or None`	`None`	See signature.
`include_paths`	no	`bool`	`True`	See signature.
`exclude_diagnostics`	no	`bool`	`True`	See signature.
`minimum_voxels`	no	`int`	`1`	See signature.
`resample_mask`	no	`bool`	`True`	See signature.
`on_error`	no	`OnError`	`'skip'`	See signature.

Returns

dict[str, Any] | None

See also: BOA module guide.

`fyron.visualization.boa.create_boa_segmentation_collage`

Create a multi-patient BOA collage with OpenCV.

Import path: fyron.visualization.boa.create_boa_segmentation_collage

python

create_boa_segmentation_collage(boa_folders: Sequence[StrPath], output_path: StrPath, *, orientation: Orientation = 'axial', segmentation_layers: Sequence[SegmentationLayer | SegmentationKind | str] | None = None, patient_labels: Sequence[str] | None = None, slice_index: int | None = None, slice_indices: Sequence[int] | None = None, slice_fraction: float | None = None, ct_filename: str | None = None, window_center: float = 40.0, window_width: float = 400.0, segmentation_opacity: float = 0.45, overlay_alpha: float | None = None, panel_width: int = 320, row_label_prefix: str | None = None, crop_body_region: int | str | None = None, body_region_padding_mm: float = 15.0, body_region_slices: BodyRegionSliceMode = 'best') -> CollageResult

Parameters

Parameter	Required	Type	Default	Description
`boa_folders`	yes	`Sequence[StrPath]`		One BOA output directory per patient.
`output_path`	yes	`StrPath`		Destination image path (``.png`` recommended).
`orientation`	no	`Orientation`	`'axial'`	``axial,` `sagittal, or` `coronal``.
`segmentation_layers`	no	`Sequence[SegmentationLayer or SegmentationKind or str] or None`	`None`	Which masks to show and how. Pass kinds (``"body_regions",` `"tissues",` `"total") or` `SegmentationLayer` `objects with` `display_mode` `of` `ct,` `ct_overlay, or` `segmentation``.
`patient_labels`	no	`Sequence[str] or None`	`None`	Patient ID shown rotated at the start of each row (e.g. ``Patient A``).
`slice_index`	no	`int or None`	`None`	Absolute slice index along the orientation axis.
`slice_indices`	no	`Sequence[int] or None`	`None`	Multiple slice rows (absolute indices). Not combined with ``slice_fraction``.
`slice_fraction`	no	`float or None`	`None`	Relative slice position in ``[0, 1]` `per patient (handles different volume depths). Ignored when` `slice_indices`` is set.
`ct_filename`	no	`str or None`	`None`	Optional explicit CT filename inside each folder.
`window_center`	no	`float`	`40.0`	See signature.
`window_width`	no	`float`	`400.0`	CT window for grayscale / overlay backgrounds.
`segmentation_opacity`	no	`float`	`0.45`	Opacity of segmentation colors in ``ct_overlay` `and` `segmentation` `panels, in` `[0, 1]. Per-layer override via` `SegmentationLayer(opacity=...)``.
`overlay_alpha`	no	`float or None`	`None`	Deprecated alias for ``segmentation_opacity``.
`panel_width`	no	`int`	`320`	Panel width in pixels; height follows voxel spacing.
`row_label_prefix`	no	`str or None`	`None`	See signature.
`crop_body_region`	no	`int or str or None`	`None`	BOA body-region label id or name (e.g. ``3` `or` `"Abdominal Cavity"). Selects only slices containing this region and crops each panel to its bounding box (plus` `body_region_padding_mm``).
`body_region_padding_mm`	no	`float`	`15.0`	Padding around the cropped body region in millimetres.
`body_region_slices`	no	`BodyRegionSliceMode`	`'best'`	``best` `(default): slice with largest in-plane region area;` `center: middle slice of the region extent;` `all``: every slice that contains the region.

Returns

dict - `output_path, patient_paths, segmentation_layers, slice_indices_used, orientation, image_shape, and when cropping is enabled crop_body_region`.

See also: BOA module guide.

`fyron.visualization.curate_previews.PreviewSource`

Input source resolved from a directory scan.

Import path: fyron.visualization.curate_previews.PreviewSource

python

PreviewSource()

Parameters

No parameters documented.

Returns

Class constructor.

See also: BOA module guide.

`fyron.visualization.curate_previews.discover_preview_sources`

Discover DICOM series and image files below a directory.

Import path: fyron.visualization.curate_previews.discover_preview_sources

python

discover_preview_sources(input_dir: StrPath, *, recursive: bool = True, include_dicom: bool = True, include_image_files: bool = True) -> list[PreviewSource]

Parameters

Parameter	Required	Type	Default	Description
`input_dir`	yes	`StrPath`		See signature.
`recursive`	no	`bool`	`True`	See signature.
`include_dicom`	no	`bool`	`True`	See signature.
`include_image_files`	no	`bool`	`True`	See signature.

Returns

list[PreviewSource]

See also: BOA module guide.

`fyron.visualization.curate_previews.prepare_curate_image_previews`

Write Curate-ready PNG previews from medical image folders.

Import path: fyron.visualization.curate_previews.prepare_curate_image_previews

python

prepare_curate_image_previews(input_dir: StrPath, output_dir: StrPath, *, recursive: bool = True, include_dicom: bool = True, include_image_files: bool = True, panel_width: int = 384, window_center: float | None = None, window_width: float | None = None, percentile_clip: tuple[float, float] = (1.0, 99.0), overwrite: bool = False, manifest_csv: StrPath | None = None) -> dict[str, Any]

Parameters

Parameter	Required	Type	Default	Description
`input_dir`	yes	`StrPath`		Directory containing CT/MRI volumes, DICOM files, or 2-D images.
`output_dir`	yes	`StrPath`		Destination folder for PNG previews.
`recursive`	no	`bool`	`True`	If True, scan nested folders.
`include_dicom`	no	`bool`	`True`	If True, read DICOM series from directories containing DICOM files.
`include_image_files`	no	`bool`	`True`	If True, read NIfTI/MHA/NRRD and common 2-D raster image files.
`panel_width`	no	`int`	`384`	Output width per PNG. Height follows physical spacing for 3-D slices.
`window_center`	no	`float or None`	`None`	See signature.
`window_width`	no	`float or None`	`None`	Optional fixed grayscale window, useful for CT. If omitted, robust percentile normalization is used, which also works for MRI.
`percentile_clip`	no	`tuple[float, float]`	`(1.0, 99.0)`	Low/high percentiles for automatic normalization when no fixed window is supplied.
`overwrite`	no	`bool`	`False`	If False, existing PNG files are left untouched.
`manifest_csv`	no	`StrPath or None`	`None`	Optional manifest path. Defaults to ``output_dir / "manifest.csv"``.

Returns

dict - `input_dir, output_dir, manifest_csv, sources_found, images_written, images_skipped, and rows`.

See also: BOA module guide.

`fyron.visualization.volume_difference.plot_volume_difference_heatmap`

Plot aligned CT/MR slices with a zero-centered difference heatmap.

Import path: fyron.visualization.volume_difference.plot_volume_difference_heatmap

python

plot_volume_difference_heatmap(volume_a: VolumeInput, volume_b: VolumeInput, *, data_type: DataType = 'ct_hu', orientation: Orientation = 'axial', slice_index: int | None = None, slice_indices: Sequence[int] | None = None, slice_fraction: float | None = None, label_a: str = 'Volume A', label_b: str = 'Volume B', window_center: float = 40.0, window_width: float = 400.0, rescale_slope: float = 1.0, rescale_intercept: float = -1024.0, mr_normalization: str = 'percentile', mr_percentile: float = 99.0, diff_vmax: float | None = None, diff_percentile: float = 99.0, diff_cmap: str = 'fyron_diverging_blue_red', figsize: tuple[float, float] | None = None, title: str | None = None, save_path: StrPath | None = None) -> tuple[plt.Figure, np.ndarray, pd.DataFrame]

Parameters

Parameter	Required	Type	Default	Description
`volume_a`	yes	`VolumeInput`		See signature.
`volume_b`	yes	`VolumeInput`		NIfTI path, ``SimpleITK.Image, or NumPy array in` `(z, y, x)`` order. Path and SimpleITK inputs are checked for matching spacing, origin, and direction. NumPy arrays are checked for shape only.
`data_type`	no	`DataType`	`'ct_hu'`	``"ct_hu"` `assumes arrays are already Hounsfield units.` `"ct_uint16"` `converts stored values with` `arr * rescale_slope + rescale_intercept.` `"mr"` `normalizes each volume to a` `[0, 1]`` scale before comparison.
`orientation`	no	`Orientation`	`'axial'`	Slice plane: ``"axial",` `"coronal", or` `"sagittal"``.
`slice_index`	no	`int or None`	`None`	See signature.
`slice_indices`	no	`Sequence[int] or None`	`None`	See signature.
`slice_fraction`	no	`float or None`	`None`	Select one absolute slice, several absolute slices, or one relative slice location in ``[0, 1]``. If none is provided, the center slice is shown.
`label_a`	no	`str`	`'Volume A'`	See signature.
`label_b`	no	`str`	`'Volume B'`	Column labels for the first two panels.
`window_center`	no	`float`	`40.0`	See signature.
`window_width`	no	`float`	`400.0`	CT display window for ``ct_hu` `and` `ct_uint16`` inputs.
`rescale_slope`	no	`float`	`1.0`	See signature.
`rescale_intercept`	no	`float`	`-1024.0`	Conversion from stored CT values to HU for ``data_type="ct_uint16"``.
`mr_normalization`	no	`str`	`'percentile'`	See signature.
`mr_percentile`	no	`float`	`99.0`	MR normalization mode and percentile passed to ``normalize_mr``.
`diff_vmax`	no	`float or None`	`None`	Symmetric absolute limit for the difference map. When omitted, it is estimated from ``diff_percentile`` of the absolute full-volume difference.
`diff_percentile`	no	`float`	`99.0`	Percentile used for automatic ``diff_vmax``.
`diff_cmap`	no	`str`	`'fyron_diverging_blue_red'`	Matplotlib colormap name or Fyron named diverging colormap.
`figsize`	no	`tuple[float, float] or None`	`None`	Optional figure size. Defaults to a readable size based on slice count.
`title`	no	`str or None`	`None`	Optional figure title.
`save_path`	no	`StrPath or None`	`None`	Optional output image path. Parent directories are created.

Returns

tuple - `(fig, axes, table) where axes is an n_slices x 3 array and table` contains slice-level difference summary statistics.

See also: BOA module guide.