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Lesions and tumours, segmentation

CPTAC-CCRCC-Tumor-Annotations

An abdominal CT of a patient with clear cell renal cell carcinoma before treatment, the kidney tumours outlined by radiologists and reviewed by board-certified radiologists (CPTAC-CCRCC-Tumor-Annotations on CPTAC-CCRCC, TCIA).

10 test casesabdomenimage CT
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Read before comparing (9)
  • Annotations. Version 2 of 2025-10-20 of TCIA's annotations. Radiologists holding MBBS degrees or higher drew each lesion by hand in the axial plane and US board-certified radiologists reviewed it, as RECIST 1.1 target lesions: five a scan and two an organ at most, the primary lesion whatever its size, other lesions above 1 cm.
  • Cases. A case is a patient's CT series with a contour named after a kidney, before treatment: the earliest such examination, then the series with the most images, then the highest series number. 52 patients have one: the pool. The other phases carry their own contours and are not used; the 7 patients annotated on MR are too few for a set of their own.
  • Labels. Only the kidney tumours are written. The other target lesions, on 25 of the 52 series and 3 of the 10 test cases (liver, adrenal glands, nodes, the renal vein and vena cava, lung), are not. No set of all target lesions was built: the caps leave metastases and nodes undrawn, which would charge a method that found them.
  • Truth. It passes the bar of a main leaderboard, with limits. A kidney with more than two tumours, or a second one under 1 cm, has tumour left undrawn. Two contours may be one mass, as the two halves on test case C3N-01646. Benign cysts are not drawn, where KiTS labels them apart. One annotator and one reviewer a scan, no agreement published.
  • Checks. On the 19 cases with one side drawn, the label's centre lies on the side its name gives, and the ten test outlines sit on a renal mass, not on the kidney around it. TotalSegmentator makes no tumour: on C3N-00244 its left kidney holds every voxel of the 'LEFT KIDNEY' tumour. The filled volumes are 0.6 to 1.5 times the report's.
  • Images. 512 by 512 pixels of 0.62 to 1.0 mm, slices 0.625 to 5 mm apart, in Hounsfield units, the scanner's padding left outside the reconstructed circle. The series are clinical venous, nephrographic and delayed phases; test case C3N-01989 shows no enhancement of the kidneys. Where a series holds two passes (C3N-00305, C3N-00313, C3N-03018), the image is the stack with the most contours.
  • Room. The ten test tumours hold 6.4 to 518 ml (median 52; 1.2 to 620 ml in development). Moved by one voxel in plane, the test masks keep a Dice of 0.95 to 0.99 (mean 0.97); by one slice, 0.82 to 0.98 (0.92). The surface Dice is at 1 mm, the provider giving no tolerance.
  • Overlap. KiTSCT and AorticTreeCTA hold C4KC-KiTS, other patients. TotalSegMR's test image s0042 and LiverSegmentsMR's QqIPw7GVi8YiXjfX are MR series of C3L-00800 and C3L-00609, hence their exclusion. The other 38 images those two sets then held match no MR series of CPTAC-PDA, CPTAC-UCEC or CPTAC-CCRCC by slice count, rows, columns and pixel size; a series holding several volumes was not tried.
  • Public. 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-CCRCC-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 42 outside development (4 GE, 4 Siemens, 1 Philips, 1 Toshiba), and 10 development patients, the last of the same seeded order; one CT each. C3L-00800 and C3L-00609, whose MR TotalSegMR and LiverSegmentsMR hold, are left out; neither has a kidney contour on CT.
Truth
contours by experts the target lesions named after the right or the left kidney, two a kidney at most: the renal 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

C3N-00313, C3N-01654, C3L-01352, C3N-01361, C3N-03018, C3N-00492, C3L-01459, C3N-02439, C3L-01976, C3N-00194