Table 3.
Positive sample sequence summarised attribute: Total of 23 sequences are provided as positive sample sequence for patients with polyp instances during colonoscopy examination.
| Sequence | Description | Artifact |
|---|---|---|
| seq. 1 | Normal mucosa | Light reflections; green patch |
| seq. 2 | 5 mm polyp at 6 o’clock | Partially covered with stool; reflections; green patch |
| seq. 3 | Polyp at distance, 4 o’clock | Light reflection from liquid; green patch |
| seq. 4 | 2–3 mm polyp | Liquid covering half of the image; green patch |
| seq. 5 | 5 mm polyp catched by a snare | Partial occlusion by biopsy instrument |
| seq. 6 | Polyp covering half of the circumference | Cap; green patch |
| seq. 7 | Normal mucosa | Light reflection; some remnant stool; green patch |
| seq. 8 | Typical flat cancer | Light reflection; green patch |
| seq. 9 | 2 mm polyp at 2 o’clock | Light reflection; green patch |
| seq. 10 | Subtle small protrusions | some remnant stool |
| seq. 11 | Polyp at 2–3 o’clock | Light reflections in the periphery |
| seq. 12 | Dye lifted 4–5 mm polyp | Low contrast |
| seq. 13 | 6–7 mm polyp catched with a snare | Low contrast; small reflections |
| seq. 14 | Paris 1 p polyp, large long stak, JNET 2a | Lifted by Indigo Carmine, snare place around the stalk |
| seq. 15 | Paris 1 s JNET2a polyp and 1 Paris 1 sp to the left | Lifted by Indigo Carmine |
| seq. 16 | Paris 1 p polyp, large long stalk, JNET 2a | Lifted by Indigo Carmine |
| seq. 17 | Paris 1 sp polyp | Light reflections make surface assessment impossible |
| seq. 18 | Difficult interpretation | Blurry image and reduced view |
| seq. 19 | Paris 1 p polyp, large long stalk, JNET 2a | Less contrast and slightly occluded |
| seq. 20 | half of the polyp visible | Blurry image, with some blood on the mucosa |
| seq. 21 | Two adenomas polyp | Blurry image |
| seq. 22 | adenomas polyp | Blurry image makes exact diagnosis impossible |
| seq. 23 | serrated polyp | Perfect clean mucosa, minor light reflections |
Here JNET refers to Japan NBI Expert Team classification score. These sequences depict different sized polyps and location with different artifacts and varying visibility. Sequences referring to one selected image is shown in Fig. 4.