The chest radiograph on admission revealed an area of hyperlucency
containing air-fluid level in the lower 1/3 of the right lung area and an area of opacity in the lower 1/2 of the right hemithorax, with concave superior interface border (Figure 2).
One study evaluating the role of special radiological signs in the diagnosis of pneumothorax in neonates found that 46% of the neonates with pneumothorax had special radiological signs 0.5 to 27 hours before they were clinically diagnosed, namely, deep sulcus sign, medial stripe sign, basilar hyperlucency
, increased cardiomediastinal sharpness, large hyperlucent hemithorax, and the double diaphragm sign .
A chest X-ray was performed for abnormal breath sounds and showed hyperlucency
of the left lung (Figure 1).
On plain X-ray a hiatal hernia is seen as a rounded soft-tissue opacity or an air-filled hyperlucency
in the retrocardiac region, with or without an air-fluid level .
Radiography findings like hyperlucency
, diaphragm flattening, and emphysema presence were especially noted.
** Rapid tapering vascular shadows accompanied by hyperlucency
of the lungs maybe present
The chest radiograph of this patient showed relative hyperlucency
of the right lung with significant reduction in vascular markings.
The dentist had noted an area of hyperlucency
of the left palate during a routine examination.
Bullae in the lung apices, a zone of hyperlucency
between the lung parenchyma and the ribs (known as a black pleural line), and calcification in the pleura could be the other manifestations.
Other signs of pneumoperitoneum on supine abdominal film include the doge's cap sign (triangular collection of gas in Morrison's pouch), large area of hyperlucency
over the liver shadow, parahepatic air (gas bubble lateral to the right edge of the liver), air outlining the fissure of ligamentum teres and the cupola sign (gas trapped below central tendon of diaphragm).
(24) Radiographic findings include hyperlucency
in the lower chest, depression of the ipsilateral diaphragm and deepening of the lateral costophrenic sulcus.
In the asthmatics, abnormal HRCT findings of bronchial wall thickening, hyperlucency
, centrilobular prominence, bronchiectasis, thick linear opacities and mucoid impaction were found to be more prominent with increased severity, decreased FEV1 values and the duration of asthma.