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Lesions and tumours, segmentation

CPTAC-PDA-Tumor-Annotations

Abdominal CT of a patient with a pancreatic ductal adenocarcinoma before treatment, the primary tumour outlined by radiologists and reviewed by board-certified radiologists (CPTAC-PDA-Tumor-Annotations on CPTAC-PDA, TCIA).

10 test casesabdomenimage CT
Look at the images
Read before comparing (9)
  • Annotations. Radiologists with MBBS degrees or higher outlined at most five target lesions a scan, two an organ, in the axial plane, RECIST 1.1 'generally followed' and the primary tumour drawn whatever its size; US board-certified radiologists reviewed them. Version 2 of 2025-10-20 is read.
  • Case. A patient's CT series with a contour named after the pancreas or the pancreatic duct, before treatment: the earliest such examination, then the series with the most images, then the highest series number. 86 patients have one, and 84 are the pool. The 13 patients annotated on MR are too few for a set of their own.
  • Label. The map holds the primary tumour's organ only, every lesion there. The series' other target lesions (liver, adrenal glands, nodes, lung) are not written, and a structure the descriptor does not name is not scored; 28 of the 86 series hold such targets, 2 of the 10 test cases among them. The cap of two lesions is reached in the pancreas on 6 of 86 series.
  • Truth. It meets the main leaderboard's bar, with limits: one annotator and one reviewer a scan, no second outline and no agreement published, and a cystic or benign pancreatic lesion that is no target is not drawn. The surface Dice is at 1 mm, the provider giving no tolerance.
  • Images. The clinic's own series, venous and arterial phases; development case C3L-05708 is named without contrast. Test case C3L-04495 is a chest CT whose lowest seven slices (5 mm) hold the tumour, at the edge of the field, and C3N-02998's image is the pass of 92 slices drawn on.
  • Tumours. 1.0 to 37 ml on the ten test CTs (median 9.4), in one piece but on C3L-05754 (two contours). Each test outline sits on a pancreatic mass darker than the gland after contrast, and the filled volumes agree with the report's (0.9 to 1.3 times). On C3L-01702, TotalSegmentator's pancreas holds 97% of the tumour's voxels.
  • Room. Moved by one voxel in plane, the test masks keep a Dice of 0.91 to 0.98 (mean 0.95); by one slice, 0.49 to 0.93 (0.79). On the smallest tumours (C3N-02998, 1.0 ml on three slices) the truth's own uncertainty from slice to slice weighs on any score.
  • Overlap. TotalSegMR's development image s0359 is C3L-03348's MR, left out here. The 40 images TotalSegMR and LiverSegmentsMR then held were compared with the CPTAC-PDA, CPTAC-UCEC and CPTAC-CCRCC MR series of their size: no other match, series holding several volumes untried. SAROSBodyCT, built from SAROS, holds one CPTAC-PDA patient, none of the 20 here, and leaves them out.
  • Outside numbers. None on these cases. The annotations are public since 2023: a network trained on them may have seen the test cases.

No method has a result on every case of this dataset yet.

Case by case

Click a score to look at that result: the image, the truth in green and the method's map in red. Underlined scores have their image; for the others you see the case without the result.

About the data

The first test case of CPTAC-PDA-Tumor-Annotations
The first test caseClick to look at every case.
Test cases
10 test patients drawn with seed 2026 by the maker of the annotated CT among the 74 outside development (6 GE, 2 Siemens, 1 Toshiba, 1 whose series names no maker), and 10 development patients, the last of the same seeded order; one CT each. Left out of the pool: C3L-03348, whose MR TotalSegMR holds, and C3L-03639, whose annotated series cannot be read as a volume.
Truth
contours by experts the target lesions named after the pancreas or the pancreatic duct, one or two a scan: the primary tumour, drawn by hand in the axial plane by radiologists (MBBS or higher) and reviewed by US board-certified radiologists, as RECIST target lesions
Licence
CC BY 4.0
10 cases for tuning, never tested

C3L-02112, C3L-05057, C3N-00957, C3N-02997, C3L-03743, C3L-05053, C3L-03356, C3L-00395, C3L-04853, C3L-05708