{"id":"idc-ct-vs-pet-ventilation-imaging","title":"CT-vs-PET-Ventilation-Imaging","short_title":"ct_vs_pet_ventilation_imaging","aliases":["ct_vs_pet_ventilation_imaging"],"summary":"The purpose of the CT Ventilation as a Functional Imaging Modality for Lung Cancer Radiotherapy study was to enable comparisons between: (i) CT ventilation images derived from exhale/inhale BHCT scans, (ii) CT ventilation images derived from free-breathing 4DCT scans, and (iii) Galligas PET (nuclear medicine) ventilation scans. This dataset can build the international capacity for prototyping and evaluating new CT ventilation imaging technologies. For this study, 20 lung cancer patients underwent exhale/inhale breath hold CT (BHCT), free-breathing four-dimensional CT (4DCT) and Galligas PET ventilation scans in a single session on a combined 4DPET/CT scanner.All image acquisitions were performed on a Siemens Biograph mCT.S/64 PET/CT scanner (Siemens, Knoxville, USA) at the Royal North Shore Hospital between 2013 and 2015. A total of 20 4DCT scans, 20 inhale/exhale BHCT scans, 20 Galligas PET scans and 19 attenuation CT scans (missing for CT-PET-VI-07) were successfully acquired for the 20 patients and included in this dataset. Please see the CT-vs-PET-Ventilation-Imaging wiki page to learn more about the images and to obtain any supporting metadata for this collection.","one_liner":null,"identifiers":[{"scheme":"idc_collection_id","value":"ct_vs_pet_ventilation_imaging","url":"https://portal.imaging.datacommons.cancer.gov/explore/?collection_id=ct_vs_pet_ventilation_imaging","is_primary":true,"evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC v3 API /collections","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":null,"locator":null,"confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]},{"scheme":"tcia_collection","value":"CT-vs-PET-Ventilation-Imaging","url":"https://www.cancerimagingarchive.net/collections/","is_primary":false,"evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC v3 API /collections","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":null,"locator":null,"confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]},{"scheme":"doi","value":"10.7937/3ppx-7s22","url":null,"is_primary":false,"evidence":[{"method":"fulltext","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC collection description","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":"The purpose of the CT Ventilation as a Functional Imaging Modality for Lung Cancer Radiotherapy study was to enable comparisons between: (i) CT ventilation images derived from exhale/inhale BHCT sc","locator":"accession extracted from description prose","confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Cross-repository link recovered from prose; verify before relying on it."}]}],"repository":{"name":"NCI Imaging Data Commons","short_name":"IDC","url":"https://portal.imaging.datacommons.cancer.gov","is_nci_crdc_node":true,"is_nih_repository":true},"additional_repositories":[],"program_name":"NCI Imaging Data Commons / The Cancer Imaging Archive","program_url":"https://imaging.datacommons.cancer.gov/","nci_program":"IDC","generating_institutions":[],"data_generation_funding_role":"unknown","version":null,"release_date":null,"last_upstream_update":null,"retrieved_at":"2026-09-18T02:44:36.389375Z","landing_page_url":"https://portal.imaging.datacommons.cancer.gov/explore/?collection_id=ct_vs_pet_ventilation_imaging","cancer_types":[{"label":"Lung Cancer","ontology":null,"code":null,"url":null}],"primary_sites":["Lung"],"subject":{"scope":"single","tissues":["LUNG"],"evidence":[{"method":"derived","source_url":null,"source_label":"cds.subjects","retrieved_at":null,"snippet":null,"locator":"cancer_types: Lung Cancer; primary_sites: Lung","confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Repository disease labels or primary sites mapped to pinned tissues."}]},"is_pediatric":null,"model_systems":[],"cohort":{"n_cases":20,"n_samples":null,"n_aliquots":null,"n_files":null,"total_bytes":null,"n_tumor_cases":null,"n_normal_cases":null,"has_matched_normal":null,"demographics":{"sex":{},"race":{},"ethnicity":{},"age_at_diagnosis_years":{},"vital_status":{},"country_or_region":{},"evidence":[]},"evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC v3 API /collections","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":null,"locator":null,"confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]},"assays":[{"modality":"radiology","label":"DICOM medical imaging","platform":null,"n_cases":20,"n_samples":null,"n_files":null,"data_levels":["DICOM series"],"access_tier":"open","evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC v3 API /collections","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":null,"locator":null,"confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]}],"clinical_variables":[],"longitudinal":{"has_followup":null,"has_survival_endpoint":null,"survival_endpoints":[],"median_followup_months":null,"max_followup_months":null,"n_cases_with_followup":null,"has_serial_samples":null,"timepoints":[],"n_cases_with_serial":null,"has_treatment_response":null,"response_criteria":[],"evidence":[]},"access":{"tier":"open","open_components":[],"controlled_components":[],"mechanism":"Public DICOM download from the IDC portal, its API, or the idc-index Python package; no account required for public collections.","dua_url":null,"data_access_committee":null,"typical_turnaround":null,"embargo_until":null,"login_required":false,"citation_requirement":"Cite the collection DOI and the IDC/TCIA data-citation guidance.","license":"Per-collection license, typically CC BY 3.0/4.0 or CC BY-NC","publication_policy_url":"https://www.cancerimagingarchive.net/data-usage-policies-and-restrictions/","evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/collections/ct_vs_pet_ventilation_imaging","source_label":"IDC v3 API /collections","retrieved_at":"2026-09-18T02:44:36.389375Z","snippet":null,"locator":null,"confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]},"useful_for":[],"limitations":[{"kind":"missing_data","statement":"IDC serves no clinical table for this collection, so nothing about outcome, stage, treatment or demographics can be read from the repository. Any such variable would have to come from the originating trial or publication.","severity":"blocking","affected_analyses":["survival","treatment response","stage-adjusted modelling","analysis by race or ethnicity"],"mitigation":null,"evidence":[{"method":"api","source_url":"https://api.imaging.datacommons.cancer.gov/v3/clinical/tables","source_label":"IDC v3 API /clinical/tables","retrieved_at":"2026-09-19T03:20:46.830869Z","snippet":null,"locator":"collection_id=ct_vs_pet_ventilation_imaging: no clinical table is served","confidence":"high","reviewer":null,"reviewed_at":null,"note":null}]}],"inappropriate_uses":[],"primary_publications":[],"reuse":[],"reuse_metrics":{"n_candidates_screened":0,"n_by_tier":{},"n_by_tier_raw":{},"accession_precision":null,"n_citations_to_primary_publication":null,"citation_to_reuse_ratio":null,"has_citable_accession":false,"n_verified_reuse":null,"n_reuse_examined":0,"n_independent_reuse":0,"n_nci_funded_reuse":0,"first_reuse_year":null,"latest_reuse_year":null,"years_since_release":null,"expected_reuse":null,"reuse_gap_index":null,"reuse_gap_percentile":null,"search_strategy_id":"epmc-index-v3","searched_at":"2026-09-20T18:07:49.656957Z","no_reuse_identified":false,"evidence":[{"method":"derived","source_url":null,"source_label":"reuse index","retrieved_at":"2026-09-20T18:07:49.656957Z","snippet":null,"locator":null,"confidence":"low","reviewer":null,"reviewed_at":null,"note":"This dataset has no accession specific enough to search for in the literature, so citation-based reuse cannot be measured. Absence of a count here is not evidence of absence of reuse."}]},"underexplored":{"is_underexplored":false,"basis":["Not assessed: this dataset has no accession specific enough for citation-based reuse tracing, so a shortfall cannot be measured."],"index_value":null,"percentile":null,"comparator_set":"rgi-huber-v2","evidence":[]},"grants":[],"access_steps":[{"order":1,"action":"Open the collection in the IDC portal","detail":"Browse the series before downloading; imaging collections can be very large.","url":"https://portal.imaging.datacommons.cancer.gov/explore/?collection_id=ct_vs_pet_ventilation_imaging","requires":[],"est_time":"5 minutes","cli_snippet":null,"audience":"human","evidence":[{"method":"derived","source_url":"https://portal.imaging.datacommons.cancer.gov/explore/?collection_id=ct_vs_pet_ventilation_imaging","source_label":"IDC access documentation","retrieved_at":"2026-09-21T12:30:59.439868Z","snippet":null,"locator":null,"confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Generated by applying the repository's documented access policy to this dataset's identifiers. It is not a reviewer's account of this dataset."}]},{"order":2,"action":"Read the collection's own licence","detail":"Per-collection license, typically CC BY 3.0/4.0 or CC BY-NC. IDC licences differ by collection.","url":"https://www.cancerimagingarchive.net/data-usage-policies-and-restrictions/","requires":[],"est_time":"5 minutes","cli_snippet":null,"audience":"human","evidence":[{"method":"derived","source_url":"https://www.cancerimagingarchive.net/data-usage-policies-and-restrictions/","source_label":"IDC access documentation","retrieved_at":"2026-09-21T12:30:59.439870Z","snippet":null,"locator":null,"confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Generated by applying the repository's documented access policy to this dataset's identifiers. It is not a reviewer's account of this dataset."}]},{"order":3,"action":"Download with idc-index","detail":"The package resolves the collection to its buckets and pulls selected data.","url":"https://github.com/ImagingDataCommons/idc-index","requires":[],"est_time":"hours for a full collection","cli_snippet":"pip install idc-index\npython - <<'PY'\nfrom idc_index import IDCClient\nIDCClient().download_from_selection(collection_id=\"ct_vs_pet_ventilation_imaging\", downloadDir=\".\")\nPY","audience":"human","evidence":[{"method":"derived","source_url":"https://github.com/ImagingDataCommons/idc-index","source_label":"IDC access documentation","retrieved_at":"2026-09-21T12:30:59.439872Z","snippet":null,"locator":null,"confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Generated by applying the repository's documented access policy to this dataset's identifiers. It is not a reviewer's account of this dataset."}]},{"order":4,"action":"List the series before pulling pixels","detail":"List modality and size first so an agent can choose what to fetch.","url":"https://learn.canceridc.dev/","requires":[],"est_time":null,"cli_snippet":"python - <<'PY'\nfrom idc_index import IDCClient\ni = IDCClient().index\ns = i[i[\"collection_id\"] == \"ct_vs_pet_ventilation_imaging\"]\nprint(len(s), \"series\", s[\"PatientID\"].nunique(), \"patients\",\n      round(s[\"series_size_MB\"].sum() / 1024, 1), \"GB\")\nprint(s[\"Modality\"].value_counts().to_dict())\nPY","audience":"agent","evidence":[{"method":"derived","source_url":"https://learn.canceridc.dev/","source_label":"IDC access documentation","retrieved_at":"2026-09-21T12:30:59.439874Z","snippet":null,"locator":null,"confidence":"medium","reviewer":null,"reviewed_at":null,"note":"Generated by applying the repository's documented access policy to this dataset's identifiers. It is not a reviewer's account of this dataset."}]}],"analysis_examples":[],"agent_package":{"json_url":"/data/datasets/idc-ct-vs-pet-ventilation-imaging.json","jsonld_url":"/data/jsonld/idc-ct-vs-pet-ventilation-imaging.jsonld","croissant_url":"/data/croissant/idc-ct-vs-pet-ventilation-imaging.json","instructions_url":"/data/agent/idc-ct-vs-pet-ventilation-imaging.md","bundle_url":null,"mcp_resource_uri":null},"related_dataset_ids":[],"related_underexplored_ids":[],"review":{"status":"machine_only","reviewer":null,"reviewer_affiliation":null,"reviewed_at":null,"sections_reviewed":[],"open_questions":[],"notes":null},"verification":{"last_verified_at":null,"link_checks":[],"n_links_ok":0,"n_links_broken":0,"upstream_version_seen":null,"upstream_version_changed":false,"upstream_counts_seen":{},"upstream_drift":{},"notes":[]},"is_showcase":false,"completeness_score":16.1,"tags":["idc","imaging"],"search_text":null}