This document provides information about chest x-ray interpretations. It includes labeled diagrams of the structures seen on a lateral chest x-ray and a posteroanterior (PA) chest x-ray. The diagrams identify anatomical structures like the aorta, heart borders, lungs, diaphragm, ribs, trachea and gastric/colonic air. Links are provided to external sources with further information on chest x-ray interpretations.

1. “CON LA
AYUDA DE
OTROS”
Gaspar Alberto Motta Ramirez,
médico radiólogo,
radbody2013@yahoo.com.mx
11, Diciembre, 2022

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21. https://radiology.expert/x-

33. https://dentowesome.in/2020/06/02/chest-xray-
interpretations/

42. Structures seen on a lateral chest x-ray.
A = aorta; CPA = posterior costophrenic
angle; LHD = left hemidiaphragm; PHB =
posterior heart border (Note: The posterior
heart border represents the left atrium
superiorly and left ventricle inferiorly; the
anterior heart border is not clearly defined
on this film but represents the right
ventricle.); RA = retrosternal airspace;
RHD = right hemidiaphragm; RMF = right
major fissure (left major fissure and minor
fissures not well visualized on these films
but can occasionally be seen); S =
scapula; T = tracheal air column.
https://flylib.com/books/en/2.569.1.23/1/

43. Structures seen on a posteroanterior (PA) chest
x-ray.
1 = first rib; 2 10 = posterior aspect of ribs 2 10;
AK = aortic knob; APW = aortopulmonary window,
BS = breast shadow (labeled only on right); C =
carina; CA = colonic air; CPA = costophrenic
angle, DA = descending aorta; GA = gastric air;
LHB = left heart border (Note: Most of the left
heart border represents the left ventricle; the
superior aspect of the left heart border represents
the left atrial appendage.); LPA = left pulmonary
artery; RC = right clavicle (left clavicle not
labeled); RHB = right heart border (Note: The
right heart border represents the right atrium.);
RHD = right hemidiaphragm (left hemidiaphragm
not labeled); RPA = right pulmonary artery; T =
tracheal air column.
https://flylib.com/books/en/2.569.1.23/1/