Table 3.
Classification of Images by Imaging Modality
| Modality | Number | Frequency (%) | Example text words |
|---|---|---|---|
| CT | 22,458 | 23.8 | CT; MDCT; computed tomography |
| Graphic | 7,527 | 8.0 | Diagram; drawing; bar chart |
| MRI | 24,862 | 26.4 | MR; T1-weighted; MRCP |
| Nuc Med | 603 | 0.6 | Nuclear medicine; scintigraphy; SPECT |
| PET | 777 | 0.8 | PET; positron; FDG |
| Photo | 3,967 | 4.2 | Photomicrograph; endoscopic image |
| US | 7,782 | 8.3 | US; Doppler; sonography |
| X-ray | 12,426 | 13.2 | Radiograph; X-ray; ERCP |
| Total Classified | 80,402 | 85.3 | |
| Unclassified | 13,854 | 14.7 | |
| Total | 94,256 | 100.0 |
Each image was assigned to one of eight imaging modalities, as itemized here. The “example text words” indicate some of the terms used to assign the imaging modality.