fidopt Interactive view
Thyroid nodules on ultrasound, 2D segmentation

DDTI, thyroid nodules outlined on ultrasound

A 2D B-mode thyroid ultrasound image of a patient's nodule, described with TI-RADS by radiologists of IDIME (Bogotá) and outlined in the provider's web tool: one image a case of DDTI's first version (Pedraza et al. 2015).

29 test caseshead and neckimage US2D, distances in pxresearch only
Look at the images
Read before comparing (9)
  • Images. JPEGs of 560 x 360 pixels from Toshiba Nemio 30 and Nemio MX scanners, in colour as stored; many show two views of the nodule side by side, each outlined. No pixel size is given, so distances are in pixels.
  • Cases. The archive holds 390 cases (numbers 1 to 400) and 480 images. 298 cases carry a TI-RADS score, for the paper's 299 patients: the pool is those, one case a patient. The 92 cases with no description are left out; they hold byte copies of described cases' images (150, 323, 326 and 349 repeat one of 233, 396 one of 353).
  • Cut outlines. The tool kept an outline in 2,500 characters: 8 outlines stop mid-way, 7 of them on a described case's first image (54, 127, 166, 176, 197, 203 and 205), and those cases are left out. It also stored 8 arrows, on 6 cases, which are not outlines and stay out of the truth.
  • Truth. Two radiologists described each case; the paper does not say which of them drew the outlines, and radiology residents annotated images for training too. No agreement figure is given for the outlines.
  • Patients. The XMLs name no patient, only an age and a sex. No development case shares both with a test case (69 cases of the pool held back for it); a patient with two described cases could otherwise fall on two sides.
  • Tolerance and start. 2 pixels: on the test images the truth grown or thinned by one pixel keeps a Dice of 0.98 and a surface Dice of 0.995 to 0.997 at 1 pixel, 0.999 at 2. The whole image scores a Dice of 0.16 and its dark pixels (under Otsu's threshold, the black frame included) 0.06; a nodule covers 9% of its image on average (1 to 26%).
  • Source. The provider's page and archives are gone from the university's site (404). prepare.py reads the original archive, 'DDTI first version', from the Wayback Machine's copy of 28 July 2024, every member pinned by the archive's central directory. The 'second version' (2023, TI-RADS updated) was not archived.
  • Overlap. No other dataset of the corpus holds thyroid ultrasound. SonoCorpus's DDTI is the TN-SCUI 2020 winners' copy, 637 single-view crops at 256 x 256, whose MD5s cannot meet these files; none of its files matches another of its sets. TN3K and TN-SCUI come from hospitals in China.
  • Seen. DDTI has been public since 2015 and is in SAMUS's US30K training set: a model trained on it has probably seen the test cases. SonoBase was evaluated on DDTI (the TN-SCUI 2020 winners' crops), not trained on it.

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

Under a licence that is not open

Methods whose code or weights are released for non-commercial use, or under share-alike or custom terms: shown for reference, ranked nowhere.

AccuracyCost
#MethodDiceSurface DiceHD95 pxTime sRAM GBGPU GBMachineImages
Medical SAM3 · thyroid noduleGPUappSAM License (code); weights: MIT on the model card, a fine-tune of SAM 3's weights (SAM License)older run0.393 ±0.1340.138 ±0.058113.94 ±35.016.66.3Laptop

Dice: how much the organ contours overlap, 1 is perfect. Surface Dice: the share of the contours' surfaces within a tolerance of each other, 1 is perfect. HD95: distance between the contours' surfaces.

Case by case

Dice1234567891011121314151617181920212223242526272829

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

Test cases
29 test cases drawn with seed 2026 among the 291 described cases with a whole outline, and 26 development cases, the last of the same seeded order less any whose age and sex are a test case's. One image a case, its first outlined one.
Truth
contours by experts the nodule outlined as a freehand polygon in the provider's web annotation tool, the case described with TI-RADS by head-and-neck radiologists of IDIME (Pedraza et al. 2015); a two-view image has one outline in each view
Licence
none stated (the paper calls the database open access)
26 cases for tuning, never tested

13, 366, 247, 187, 259, 179, 105, 257, 316, 204, 386, 268, 113, 25, 50, 369, 27, 6, 90, 95, 311, 306, 130, 330, 190, 244