Table 2.
Evaluation of CT imaging distribution and severity of two periods for initial negative RT-PCR and positive RT-PCR of patients with COVID-19. Number (%).
| First chest CT(32 patients) | Second chest CT(25 patients) | |
|---|---|---|
| Ground glass opacities | 31(96.9%) | 21(84.0%) |
| Right upper lobe | 22(68.8%) | 15(60.0%) |
| Right middle lobe | 13(40.6%) | 9(36.0%) |
| Right lower lobe | 18(56.3%) | 16(64.0%) |
| Left upper lobe | 15(46.9%) | 16(64.0%) |
| Left lower lobe | 19(59.4%) | 16(64.0%) |
| Consolidation | 17(53.1%) | 16(64.0%) |
| Right upper lobe | 2(6.3%) | 6(24.0%) |
| Right middle lobe | 2(6.3%) | 4(16.0%) |
| Right lower lobe | 12(37.5%) | 13(52.0%) |
| Left upper lobe | 4(12.5%) | 6(24.0%) |
| Left lower lobe | 13(40.6%) | 12(48.0%) |
| Number of lobes affected | ||
| 1.0 | 9(28.1%) | 4(16.0%) |
| 2.0 | 1(3.1%) | 1(4.0%) |
| 3.0 | 8(25.0%) | 4(16.0%) |
| 4.0 | 5(15.6%) | 4(16.0%) |
| 5.0 | 9(28.1%) | 12(48.0%) |
| Unilateral lung | 10(31.3%) | 3(12.0%) |
| Bilateral lung | 22(68.8%) | 22(88.0%) |
| More than 2 lobes affected | 21(65.6%) | 21(84.0%) |
| Median of total Lung Severity Score (25%,75%) | 6(2.25,9.75) | 8(3.5,10.5) |
| Crazy-paving pattern | 4(12.5%) | 3(12.0%) |
| Peripheral distribution | 24(75.0%) | 11(44.0%) |
| Pleural effusion | 0(0%) | 1(4.0%) |
| Other abnormalities | ||
| Cavitation | 0(0%) | 0(0%) |
| Interlobular septal thickening | 6(18.8%) | 4(16.0%) |
| Calcification | 0(0%) | 0(0%) |
| Lymphadenopathy | 0(0%) | 0(0%) |
| Dose Length Product(mGy.cm) | 248 (196,291) | 207(174,263) |
| Effective Dose(mSv) | 3.48 (2.75,4.08) | 2.9(2.43,3.69) |