Cardiothoracic Imaging
Contents Anatomy Techniques Findings Cases References
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Pulmonary angiogram, arterial




Notes

Follow-up radiograph

COMMENTS

Angiograms are created by injecting an iodine solution into the bloodstream. Iodine was chosen because it is a high atomic weight material which differentially attenuates x-rays but is nonetheless well tolerated by the body (it is mostly excreted in the urine). When a catheter is threaded into the pulmonary artery and an iodinated solution ejected from its tip, the pulmonary arteries are quickly first opacified showing a relatively vertically oriented branching pattern, originating at the hilum. Normal arteries progressively reduce in diameter after multiple branches.

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December 18, 2004 (PL)
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