Table 1.
Success rates of obtaining nine fetal echocardiography views after applying the Fetal Intelligent Navigation Echocardiography (FINE) method to 246 normal spatiotemporal image correlation (STIC) volume datasets using diagnostic planes and/or Virtual Intelligent Sonographer Assistance (VIS-Assistance®)
| Diagnostic plane (n=246) | VIS-Assistance® (n=246) | Diagnostic plane and/or VIS-Assistance® (n=246) | ||||
|---|---|---|---|---|---|---|
| Fetal echocardiography view | n (%) | 95% CI* | n (%) | 95% CI* | n (%) | 95% CI* |
| 1. Four-chamber | 229 (93) | 89 to 96 | 246 (100) | 98 to 100 | 246 (100) | 98 to 100 |
| 2. Five-chamber | 231 (94) | 90 to 96 | 245 (99.6) | 98 to >99.9 | 245 (99.6) | 98 to >99.9 |
| 3. LVOT | 225 (91) | 87 to 94 | 243 (99) | 96 to 99.7 | 243 (99) | 96 to 99.7 |
| 4. Short-axis view of great vessels/RVOT | 216 (88) | 83 to 91 | 245 (99.6) | 98 to >99.9 | 245 (99.6) | 98 to >99.9 |
| 5. 3VT | 226 (92) | 88 to 95 | 245 (99.6) | 98 to >99.9 | 245 (99.6) | 98 to >99.9 |
| 6. Abdomen/Stomach | 246 (100)† | 98 to 100 | 246 (100)‡ | 98 to 100 | 246 (100) | 98 to 100 |
| 7. Ductal arch | 205 (83) | 78 to 88 | 239 (97) | 94 to 99 | 239 (97) | 94 to 99 |
| 8. Aortic arch | 214 (87) | 82 to 91 | 238 (97) | 94 to 98 | 238 (97) | 94 to 98 |
| 9. SVC/IVC | 187 (76) | 70 to 81 | 236 (96) | 93 to 98 | 236 (96) | 93 to 98 |
| • SVC | 230 (93) | 90 to 96 | --- | --- | --- | --- |
| • IVC | 200 (81) | 76 to 86 | --- | --- | --- | --- |
The Wald method was used to calculate two-sided CIs for proportions expressed in the table; as the true proportion cannot exceed 100%, upper confidence limits are truncated at 100%.
Defined as visualization of the stomach in the diagnostic plane.
Defined as visualization of both the stomach and four-chamber view in VIS-Assistance® (to determine situs).
3VT, three-vessels and trachea; IVC, inferior vena cava; LVOT, left ventricular outflow tract; RVOT, right ventricular outflow tract; SVC, superior vena cava.