Line 3:13·Do not put punctuation at the end of a heading.
Headings Valid
warning
Expected headings
H1
Terminology
H1
Usage
H1
Epidemiology
H2
Risk factors
H2
Associations
H1
Clinical presentation
H2
Complications
H1
Diagnosis
H2
Diagnostic criteria
H2
Diagnostic clues
H1
Pathology
H2
Aetiology
H2
Location
H2
Classification
H2
Macroscopic appearance
H2
Microscopic appearance
H2
Immunophenotype
H2
Markers
H2
Genetics
H1
Radiographic features
H2
Plain radiograph
H2
Mammography
H2
Antenatal ultrasound
H2
Transoesophageal echocardiography
H2
Ultrasound
H2
CT
H3
Dual-energy CT
H2
Angiography (DSA)
H2
MRI
H2
CT/MRI
H2
Nuclear medicine
H3
PET-CT
H3
PET-MRI
H1
Radiology report
H1
Treatment and prognosis
H2
Complications
H1
History and etymology
H1
Differential diagnosis
H2
Clinical differential diagnosis
H1
Practical points
H1
See also
"Aetiology:"
Line 3:1·"Aetiology:" is not a recognised heading for this article type.
Oxford Comma
suggestion
"Imaging features depend on the cause of the obstruction, complete or check valve, and on collateral flow. The lung may be atelectatic or hyperinflated and ventilation and perfusion will be reduced."
Line 33:48·Use the Oxford comma in 'obstruction, complete or check'.