Page History

Data Access

Collections Used in this Third Party Analysis

Below is a list of the Collections used in these analyses:

Click the Versions tab for more info about data releases.

Additional Resources for this Dataset

The following external resources have been made available by the data submitters.  These are not hosted or supported by TCIA, but may be useful to researchers utilizing this collection.

• NCTN/NCORP Data Archive provides the Clinical Data files related to these subjects, and is also where you go to request access to the entire dataset
• Jupyter notebook demonstrating how to use the NBIA Data Retriever Command-Line Interface application and our REST API (with authentication) to access these data
• Instructions for Visualizing these data in 3D Slicer

Detailed Description

Important information contained in the DICOM headers:

1. Anatomic Region Sequence (0x0008, 0x2218) was inserted containing CNS Segmentation Types as defined in: https://dicom.nema.org/medical/dicom/current/output/chtml/part16/sect_CID_7153.html. In cases where tumor spans multiple regions, multiple location codes were inserted. For example, if the tumor is centered in the parietal lobe, but also involves the frontal and temporal lobes, anatomical codes for all three locations were attached to the structure.
2. Segmented Property Category Code Sequence (0x0062,0x0003) was inserted into DICOM SEG objects containing one of the following codes:
   • (NCIt, C113842, "Enhancing Lesion")
   • (NCIt, C81175, "Non-Enhancing Lesion")
   • (SNOMED-CT, 14799000, "Neoplasm, Secondary")
   • (SNOMED-CT, 79654002, "Edema")
3. Tracking ID (0x0062,0x0020) and Tracking UID (0x0062,0x0021) tags were inserted for each segmented structure to enable longitudinal lesion tracking.
4. A study time point description was inserted into the Clinical Trial Time Point ID (0x0012,0x0050) attribute to help identify each annotation in the context of the clinical trial assessment protocol. The time point description contains one of the following strings: pre-operative, post-operative, post-radiation, post-chemotherapy, or recurrence. Additionally, a Concept Name Code Sequence (0x0040, 0xA043) and Concept Code Sequence (0x0040,0xA168) were added to Acquisition Context Sequence (0x0040, 0x0555).The former defines a Time Point Type concept and latter is populated with one of the following concepts:
   • (SNOMED-CT, 262068006, "Pre-operative")
   • (SNOMED-CT, 262061000, "Post-operative")
   • (SNOMED-CT, 264908009, "Post-radiation")
   • (SNOMED-CT, 262502001, "Post-chemotherapy")
   • (SNOMED-CT, 25173007, "Recurrent tumor (finding)")
5. For reviewed studies with no radiologic findings, a "negative" DICOM SEG and/or RTSS file are provided. These files contain no segmentation or contour data, but still contain pertinent metadata in Clinical Trial Time Point ID, Acquisition Context Sequence, Anatomic Region Sequence, and Segmented Property Category Code Sequence. The primary motivation for providing these annotations is to capture the information that no radiologic findings (e.g. progression or new metastatic disease) were found during review.

Citations & Data Usage Policy

Other Publications Using This Data

TCIA maintains a list of publications which leverage TCIA data. If you have a manuscript you'd like to add please contact TCIA's Helpdesk.

Version 3 (Current): Updated 2023/08/03

Updated annotation metadata spreadsheet column for Annotation Type to be consistent with other NCTN annotation datasets.

Version 2: Updated 2023/03/21

Removed 5 duplicated annotation files and updated metadata report.

Version 1: Updated 2022/10/05