Anterior-posterior (AP) image
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Anterior-posterior (AP) image
- AP images are of inferior quality to PA images (posterior-anterior)
- The cardiothoracic ratio (CTR) is exaggerated on AP images
- As a general rule the heart should not be considered large if the CTR is increased on an AP view
- Note that the view is also lordotic which further exaggerates heart size
- This image was repeated (see below)
PA (posterior-anterior) image
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PA (posterior-anterior) image
- (Same patient as image above)
- A good quality PA image shows the heart is not enlarged
- Read more about projection