Computerized tomographic identification of visceral pleural changes other than in interlobar lung fissures

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Abstract
Computer window adjustments are possible when viewing the pictures obtained on computerized tomography (CT). A mediastinal window setting is used for pleural viewing (soft tissue), whereas a double‐window adjustment allows pleura and lung substance to be viewed concomitantly. The lung can also be viewed on its own by using a corresponding window setting. Relevant cases with pleural changes were investigated by CT. With the window adjustments, it was possible to demonstrate pleural extrusions (tags) penetrating the lung substance and retracting the thickened or calcified overlying pleural areas. The areas of pleural retraction are identified as the pleura covering and encasing the lung itself, i.e., the visceral pleura.

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