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Summary

Excerpt

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locationhttps://www.cancerimagingarchive.net/collection/exact/
Accurate pre-therapeutic imaging of the tumour and regional lymph nodes, is - in addition to clinical examination and assessment for distant metastases -essential for prognostication and guiding treatment. Nodal staging has been validated as an important independent prognostic factor [EORTC22861; RTOG9811] and the nodal stage as well as the precise location of involved lymph nodes (mesorectum, presacral space, internal iliac lymph nodes, external iliac lymph nodes, ischiorectal fossa, inguinal lymph nodes) informs the planning of radiotherapy treatment especially when using more conformal techniques such as intensity modulated radiotherapy. It is therefore essential to optimize and standardize pre-treatment imaging to provide accurate and reproducible information to guide treatment decision, development of radiotherapy atlases and clinical trial design.

Whereas there currently exist a lack of consensus as to which staging modality should be considered as the gold standard for local staging of the tumour (T) and detection of lymph node involvement (N), the use of multi-parametric Magnetic Resonance Imaging (MRI) of the pelvis has been endorsed by international guidelines (NCCN, ESMO/ESTRO).

An expert panel of radiologist and radiation oncologists with expertise in anal cancer diagnosis and treatment identified by the Anal Staging Subgroup of the International Rare Cancer Incentive (IRCI) will be invited to participate. The panelists will be assigned into groups based on the geographical location and local practice. Each panelist will be provided with access to a series of anonymized MRI datasets of patients with newly diagnosed anal cancer and asked to provide a TNM stage as well as to identify sites of involved nodes (using a standardised proforma – Appendix1).  Each case was selected for the presence of MRI sequences like these:

  • T2w TSE sagittal [T2-w sagittal turbo spin echo (TSE) sequence covering the pelvis]
  • T1w TSE axial [sequence for pelvic nodal detection] 
  • T2-w TSE axial [sequence of the pelvis]
  • T2w TSE sFOV [high-resolution small-field-of-view T2-w TSE sequences perpendicular and parallel to the anal canal]
  • DWI [single shot spin echo-echo planar imaging DWI]
  • ADC parametric map [apparent diffusion coefficient (ADC) maps]

Acknowledgements

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

...

Localtab Group


Localtab
activetrue
titleData Access

Data Access

This is a limited access data set. If you are an investigator on this project, to request access to ExACT data, please contact help@cancerimagingarchive.net.

Data TypeDownload all or Query/FilterLicense

Images,(DICOM, 1.6 GB)


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urlhttps://wiki.cancerimagingarchive.net/download/attachments/140312582/ExACT%20January%202023.tcia?api=v2



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labelSearch
urlhttps://nbia.cancerimagingarchive.net/nbia-search/?MinNumberOfStudiesCriteria=1&CollectionCriteria=ExACT

Search: 


(Download requires NBIA Data Retriever)

TCIA Restricted

Clinical data (CSV)

Please contact help@cancerimagingarchive.net to request access to ExACT clinical data.

TCIA Restricted

Proforma for project panelists (fillable pdf, 575 kB)


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urlhttps://wiki.cancerimagingarchive.net/download/attachments/140312582/Anal%20Cancer%20Staging%20Consensus%20Form.pdf?api=v2



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TCIA Restricted

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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.

Appendix - staging criteria


Localtab
titleDetailed Description

Detailed Description

Image Statistics

Radiology Image Statistics

Modalities

MR

Number of Patients

30

Number of Studies

30

Number of Series

179

Number of Images

6,400

Images Size (GB)1.6

Note that some MR imaging sequences are missing from Patient ID 02, 04, 09, 10, 15, 25, and 26. Potential replacements were found in imaging from different people, who currently have the identifiers 9b, 10b, 15b, 25b, and 26b. They are unrelated.

Each case was selected for the presence of MRI sequences like these:

  • T2w TSE sagittal [T2-w sagittal turbo spin echo (TSE) sequence covering the pelvis]
  • T1w TSE axial [sequence for pelvic nodal detection] 
  • T2-w TSE axial [sequence of the pelvis]
  • T2w TSE sFOV [high-resolution small-field-of-view T2-w TSE sequences perpendicular and parallel to the anal canal]
  • DWI [single shot spin echo-echo planar imaging DWI]
  • ADC parametric map [apparent diffusion coefficient (ADC) maps]




Localtab
titleCitations & Data Usage Policy

Citations & Data Usage Policy

Tcia limited license policy
Please contact help@cancerimagingarchive.net to request access.

title
Info
titleData Citation

Owczarczyk K.,  Prezzi D., Boisfwr D.,  Adams, R., Goh, V.  (2023) Expert Anal Cancer Consensus Staging (ExACtExACT) [Dataset]. The Cancer Imaging Archive. https://doi.org/10.7937/2023.na2x-j031 

Info

Publication Citation

We ask on the proposal form if they have ONE traditional publication they'd like users to cite.


Info
titleTCIA Citation

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).  https://doi.org/10.1007/s10278-013-9622-7

Other Publications Using This Data

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


Localtab
titleVersions

Version 1 (Current): Updated

yyyy

2023/

mm

03/

dd

30

Data TypeDownload all or Query/FilterLicense

Images (DICOM 1.9 GB)


Tcia button generator
urlhttps://wiki.cancerimagingarchive.net/download/attachments/140312582/ExACT%20January%202023.tcia?api=v2



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labelSearch
urlhttps://nbia.cancerimagingarchive.net/nbia-search/?MinNumberOfStudiesCriteria=1&CollectionCriteria=ExACT


(Download requires the NBIA Data Retriever)

TCIA Restricted

Clinical data (CSV)

Please contact help@cancerimagingarchive.net to request access to ExACt clinical data.


TCIA Restricted

Proforma for project panelists (fillable pdf)


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urlhttps://wiki.cancerimagingarchive.net/download/attachments/140312582/Anal%20Cancer%20Staging%20Consensus%20Form.pdf?api=v2



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TCIA Restricted