Modality: X-ray (Frontal)

- “ Projection and degree on inspiration are very important to note when interpreting chest x-rays.  ”

Used in the following article:

  • Cardiothoracic ratio - “ The cardiothoracic ratio (CTR) aids in the detection of enlargement of the cardiac silhouette, which is most commonly from cardiomegaly but can be...”
  • Chest (supine view) - “ The supine anteroposterior chest view is the alternative to the PA view and the AP erect view when the patient is generally too unwell to tolerate...”
  • Chest (AP erect view) - “ The erect anteroposterior chest view is performed with the x-ray tube anteriorly, firing photons through the patient to form the image on a detect...”

View full size version of Differences in PA versus AP projection on a chest radiograph

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