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The "CT Colonography" (CTC) image collection in DICOM format, PHI de-identified for public download https://imaging.nci.nih.gov/ncia/ contains 825 cases from optical colonoscopy (OC)-validated subjects who had same-day sequential CTC followed by OC. The attached documents separately lists OC verified cases that contain: 243 Cases where no polyp was found; 69 cases possessing 6 to 9 mm polyps; and 35 cases that possess at least one polyp "larger than 10 mm." The key to the lesion coding in those XL files is: CTC key to XL colon lesion spreadsheet.docx
Collection Statistics |
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Modalities | CT |
Number of Patients | 785 |
Number of Studies | 794 |
Number of Series | 3,249 |
Number of Images | 889,732 |
