DICOM Series Selector Operator

Authors: Holoscan SDK Team (NVIDIA)
Supported platforms: x86_64, aarch64
Language: Python
Last modified: August 5, 2025
Latest version: 1.1.0
Minimum Holoscan SDK version: 1.0.3
Tested Holoscan SDK versions: 2.2.0, 3.2.0
Contribution metric: Level 2 - Trusted

This operator selects specific DICOM series from a set of studies for further processing in medical imaging workflows.

Overview

The DICOMSeriesSelectorOperator enables filtering and selection of relevant DICOM series, streamlining downstream analysis and processing in Holoscan pipelines.

Requirements

• Holoscan SDK Python package
• pydicom

Example Usage

from holoscan.core import Fragment
from operators.medical_imaging.dicom_series_selector_operator import DICOMSeriesSelectorOperator

fragment = Fragment()
selector_op = DICOMSeriesSelectorOperator(
    fragment,
    name="series_selector",  # Optional operator name
    rules="""
    {
        "Modality": "CT",
        "SeriesDescription": "Axial"
    }
    """,  # JSON string defining selection rules
    all_matched=False  # Whether all rules must match (AND) or any rule can match (OR)
)

API Reference

Python

DICOMSeriesSelectorOperator

Inherits from: Operator

This operator selects a list of DICOM Series in a DICOM Study for a given set of selection rules.

Methods

Method	Description
__init__(fragment)	Instantiate an instance.
setup(spec)
compute(op_input, op_output, context)	Performs computation for this operator.
filter(selection_rules, dicom_study_list, all_matched)	Selects the series with the given matching rules.