A chest X-ray is a fundamental imaging method for evaluating various organs and structures in the thoracic cavity, primarily used to examine the following conditions:

* Lungs and Pleura (Lung Membrane):
* Infectious diseases, including pneumonia, bronchitis, tuberculosis, and other atypical infections.
* Airway diseases such as emphysema, COPD, and asthma.
* Lung cancer, benign tumors, and other space-occupying lesions.
* Congenital or acquired structural anomalies, parenchymal diseases like fibrosis.
* Pleurisy (pleural effusion), pneumothorax, and other pleural pathologies.
* Lung involvement due to systemic or rheumatological diseases, or occupational exposures.

* Heart and Great Vessels:
* Size, position, and general contours of the heart.
* Congenital or acquired anomalies of the heart and great vessels.
* Pericardial diseases (inflammation of the heart membrane or fluid accumulation).

* Diaphragm:
* Structural disorders and movement limitations.

* Mediastinal Structures (Mid-Chest):
* Condition of structures such as the trachea, esophagus, and lymph nodes.
* Mediastinal masses or enlargements.

* Chest Wall and Bone Structures:
* Structural integrity, fractures, and deformities of bones such as the ribs, spine (thoracic portion), clavicle (collarbone), and scapula (shoulder blade).
* Soft tissue pathologies.

A chest X-ray is also an important screening and diagnostic tool, especially in cases of suspected or monitored lung cancer.