Chest X-Ray Heart Size and Contours: Anatomic Review

A review of normal cardiac anatomy on chest radiography, detailing how to assess heart size using the cardiothoracic ratio and outlining the specific chambers and great vessels that form the right and left heart borders. This refresher provides a systematic approach to identifyi…

• This is an educational tutorial from Radiology Masterclass covering the fundamentals of cardiac silhouette assessment on frontal chest X-rays.
• Describes the structures forming the right heart border (superior vena cava, right atrium, inferior vena cava) and left heart border (aortic knuckle, pulmonary trunk, left atrial appendage, left ventricle).
• Provides a qualitative framework for contour analysis; no new research data or clinical study numbers are reported.

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