TABLE 4.
Percentage Agreement of Organ- and Structure-Specific Diagnosis Codes From the Three Half-Dose Configurations and the Full Dose Plus Filtered Back-Projection (FBP) Configuration in Two Chest Organs (Lung and Mediastinum).
| Organ, Reader | Absolute Agreement, % (No./Total)
|
Normality Agreement, % (No./Total)
|
||||
|---|---|---|---|---|---|---|
| FBP | SAFIRE | aNLM | FBP | SAFIRE | aNLM | |
|
| ||||||
| Lung | ||||||
| Reader 1 | 88 (22/25) | 84 (21/25) | 80 (20/25) | 96 (24/25) | 92 (23/25) | 92 (23/25) |
| Reader 2 | 96 (24/25) | 100 (25/25) | 100 (25/25) | 96 (24/25) | 100 (25/25) | 100 (25/25) |
| Reader 3 | 84 (21/25) | 92 (23/25) | 92 (23/25) | 84 (21/25) | 92 (23/25) | 92 (23/25) |
| All readers | 89 (67/75) | 92 (69/75) | 91 (68/75) | 92 (69/75) | 95 (71/75) | 95 (71/75) |
| Mediastinum | ||||||
| Reader 1 | 100 (25/25) | 96 (24/25) | 100 (25/25) | 100 (25/25) | 96 (24/25) | 100 (25/25) |
| Reader 2 | 96 (24/25) | 96 (24/25) | 100 (25/25) | 96 (24/25) | 96 (24/25) | 100 (25/25) |
| Reader 3 | 88 (22/25) | 92 (23/25) | 92 (23/25) | 88 (22/25) | 92 (23/25) | 92 (23/25) |
| All readers | 95 (71/75) | 95 (71/75) | 97 (72/75) | 95 (71/75) | 95 (71/75) | 97 (73/75) |
Note—The three half-dose configurations were FBP, sinogram-affirmed iterative reconstruction (SAFIRE, Siemens Healthcare), and adaptive nonlocal means (aNLM). Absolute agreement was the percentage of cases with absolute agreement between diagnosis codes. Normality agreement occurred if both the full-dose and the half-dose configuration were normal or if both were not normal.