How to Interpret a Chest X-Ray

A-B-C-D-E-F-G











Two Types of X-Rays











* Anterior-Posterior (“AP”)* Classic “portable” xray* The beam shoots from in front of the patient (anterior)* TO* The plate sitting behind the patient (posterior)* Posterior-Anterior (“PA”)* Requires trip to radiology* Results in a better picture* The beam shoots from behind the patient (posterior)* TO* The plate sitting in front of the patient (anterior)











Three Indicators of a High Quality Chest X-Ray











* Well inflated lungs* Visualize spine through cardiac silhouette* Medial aspect of both clavicles lined up* Evaluates for rotation











Chest X-Ray Interpretation Mnemonic











* A-B-C-D-E-F-G* A = Airway* Trachea midline (rule out tension pneumothorax)* B = Bones* Rib/Clavicle/Shoulder fractures* C = Cardiac silhouette* Should be no bigger than 50% of distance from chest wall to chest wall* Larger than this may represent cardiomyopathy* D = Diaphragm* Costophrenic angles should be sharp* Blunted in pleural effusion* E = Equipment* Central lines* Endotracheal tubes* Chest tubes* F = Lung Fields* The most important step* Look at lung markings/tissue to evaluate for…* Pneumothorax* Consolidation* Nodules* Pulmonary Edema* G = Great vessels* Look for mediastinal widening (> 8cm)* Can be a sign of aortic injury* Looks falsely widened on AP/portable chest x-ray











Additional Reading











* How to Read a Chest X-Ray (Medgeeks)* Learn to Read a Chest X-Ray in 5 Minutes (YouTube)