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  • Annotations for Rituximab and Combination Chemotherapy in Treating Patients With Diffuse Large B-Cell Non-Hodgkin's Lymphoma (CALGB50303-Tumor-Annotations)

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Excerpt

This dataset contains image annotations derived from the NCI Clinical Trial "Rituximab and Combination Chemotherapy in Treating Patients With Diffuse Large B-Cell Non-Hodgkin's Lymphoma (CALGB50303)”.  The key objective of this project is to generate a large and highly curated imaging dataset of pediatric Hodgkin lymphoma patients with annotations suitable for cancer researchers and AI developers.

Annotation Protocol

For each patient, CapeStart reviewed every DICOM Study and DICOM Series to identify and annotate the clinically relevant time points and sequences. In a typical patient all available time points will be annotated:

In a typical patient the following annotation rules were followed:

a.    PERCIST criteria was followed. Specifically, the lesions estimated to have the most elevated SUVmax were annotated. 
b.    Lesions were annotated in the axial plane. If no axial plane were available, lesions were annotated in the coronal plane. 
c.    Lesions were annotated on the attenuation corrected PET series as well as the diagnostic contrast enhanced CT. If no diagnostic contrast enhanced CT was available for that timepoint, then the non contrast CT portion of the PET/CT was annotated. 
d.    A maximum of 5 lesions were annotated per patient scan (timepoint); no more than 2 per organ. For the purposes of this project, the lymph nodes constitute 1 organ, while other lymphatic structures such as the spleen, salivary glands, and Waldeyer’s ring structures constitute separate organs.  The same 5 lesions were annotated at each time point.  RECIST 1.1 principles were followed. Specifically, lymph nodes were annotated if > 1.5 cm in short axis. Other lesions were annotated if > 1 cm.  
e.    Lesions were labeled separately.
f.    Seed points were automatically generated and reviewed by a radiologist.

At each time point:

  1. A seed point (kernel) was created for each segmented structure. The seed points for each segmentation are provided in a separate DICOM RTSS file. 
  2. SNOMED-CT “Anatomic Region Sequence” and “Segmented Property Category Code Sequence” and codes were inserted for all segmented structures.
  3. “Tracking ID” and “Tracking UID” tags will be were inserted for each segmented structure to enable longitudinal lesion tracking.
  4. Imaging time point codes were inserted to help identify each annotation in the context of the clinical trial assessment protocol. 
    1. (255235001, SCT, “Pre-dose”)
    2. (262502001, SCT, "Post-chemotherapy")
    3. etc
    1. “Clinical Trial Time Point ID” will be was used to encode time point type using one of the following strings as applicable: “pre-dose” or “post-chemotherapy”
    2. Content Item in “Acquisition Context Sequence” was added containing "Time Point Type" using Concept Code Sequence (0040,A168) selected from:
      1. (255235001, SCT, “Pre-dose”)
      2. (262502001, SCT, "Post-chemotherapy")
      3. etc

Acknowledgements

We would like to acknowledge the individuals and institutions that have provided data for this collection:

...

Hospital/Institution Name city, state, country - Special thanks to First Last Names, degree PhD, MD, etc from the Department of xxxxxx, Additional Names from same location.



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Clark, K., Vendt, B., Smith, K., Freymann, J., Kirby, J., Koppel, P., Moore, S., Phillips, S., Maffitt, D., Pringle, M., Tarbox, L., & Prior, F. (2013). The Cancer Imaging Archive (TCIA): Maintaining and Operating a Public Information Repository. In Journal of Digital Imaging (Vol. 26, Issue 6, pp. 1045–1057). Springer Science and Business Media LLC.https://doi.org/10.1007/s10278-013-9622-7

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Images, Segmentations, and Radiation Therapy Structures/Doses/Plans CALGB50303 Annotations - Segmentations, Seed Points, and Negative Findings Assessments (DICOM, XX.X GB)

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