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Table 2 Chest imaging and diagnostic criteria of selected studies

From: Systematic review and meta-analysis for the use of ultrasound versus radiology in diagnosing of pneumonia

Study

Imaging

Pneumonia diagnosis

Patient type

Inclusion criteria

Ultrasound operator

Diagnostic criteria

Blinding

Benci et al. [27]

CXR + Chest CT if CXR/LUS discordance

Clinical diagnosis or imaging

Hospitalized

Pneumonia symptoms

Experienced physicians

Consolidation

Yes

Lichtenstein et al. [19]

Chest CT

Imaging only

Critically ill

Acute respiratory distress syndrome

Experienced physicians

Consolidation

Yes

Lichtenstein et al. [28]

Chest CT

Imaging only

Critically ill

Chest pain or severe thoracic diseases

Two ED physician sonographers

Consolidation

Yes

Lichtenstein et al. [29]

CXR + Chest CT if possible

Clinical diagnosis or imaging

Critically ill

Acute respiratory failure

Experienced physicians

Alveolar and interstitial

Yes

Parlamento et al. [30]

CXR + Chest CT if CXR/LUS discordance

Imaging only

Presented to ED

CAP symptoms

Experienced physicians

Alveolar and interstitial

Yes

Cortellaro et al. [31]

CXR + Chest CT if possible

Clinical diagnosis or imaging

Presented to ED

CAP symptoms

Experienced physicians

Alveolar and interstitial

Yes

Xirouchaki et al. [32]

Chest CT scan

Imaging only

Critically ill

Mechanically ventilated patients scheduled for chest CT scan

Single physician (Expertise not mentioned)

Consolidation

Yes

Reissig et al. [33]

CXR + chest CT if CXR/LUS discordance

Clinical diagnosis or imaging

Presented to ED or hospitalized

CAP symptoms

Experienced physicians

Consolidation

Yes

Testa et al. [34]

CXR + chest CT if possible/indicated

Clinical diagnosis or imaging

Presented to ED

Suspected H1N1 infection

Experienced physicians

Alveolar and interstitial

Yes

Unluer et al. [24]

CXR + chest CT if possible/indicated

Imaging only

Presented to ED

CAP symptoms

Trained emergency physicians

Alveolar and interstitial

Yes

Nafae et al. [37]

Chest CT scan

Imaging only

Hospitalized

Pneumonia symptoms

Experienced physicians

Consolidation

No

Esposito et al. [39]

CR

Imaging only

Critically ill

CAP symptoms

Resident with limited experience

Alveolar and interstitial

Yes

Liu et al. [38]

CT scan

Imaging only

Presented to ED

CAP symptoms

Trained emergency physicians

Consolidation

Yes

Copetti et al. [36]

Electrocardiogram, Chest X-ray, and Color-Doppler echocardiography.

Imaging only

Critically ill

acute pulmonary edema

NA

Alveolar and interstitial

NA

Iuri [23]

Chest radiographs

Imaging only

admitted to the pediatric emergency ward

CAP symptoms

Two radiologists

Alveolar and interstitial

Yes

Shah [35]

Chest radiographs

Imaging only

patients had a routine clinical examination

Pneumonia symptoms

Trained physicians

Consolidation

Yes

Dien [25]

Chest radiographs

Imaging only

Critically ill

Pneumonia symptoms

One radiologist

Consolidation

NA

Caiulo [26]

Chest radiographs

Clinical diagnosis or imaging

Presented to ED

Pneumonia symptoms

One radiologist

Alveolar and interstitial

Yes

Nazerian [40]

Chest CT scan

Clinical diagnosis or imaging

Presented to ED

Any respiratory complaint

Trained emergency physicians

Consolidation

Yes

Bourcier [41]

Chest CT scan

Clinical diagnosis or imaging

Presented to ED

CAP pneumonia 

Trained emergency physicians

Alveolar-interstitial syndrome 

NA