Pulmonary arteries CT angiography (CTA) is a non-invasive diagnostic technique used to visualize the pulmonary arteries and detect possible disruptions in blood flow. This method provides detailed three-dimensional images of the pulmonary vessels using computed tomography and a contrast medium injected into a vein.
 
Components:
CT Scanner: A device that generates X-ray beams and creates three-dimensional images of internal body structures.
Contrast Medium: A special solution injected into the vein to improve the visualization of the vessels in the images.
Software: Computer programs that process and reconstruct the images of the pulmonary arteries.
 
Applications: CTA of the pulmonary arteries is widely used for diagnosing conditions such as pulmonary embolism (PE), congenital vascular anomalies, and pulmonary hypertension. It helps in evaluating:
Pulmonary embolism: One of the main diagnostic methods for detecting blood clots blocking the pulmonary arteries.
Pulmonary hypertension: Identifying structural changes in the pulmonary vessels that may cause elevated blood pressure in the lungs.
Post-trauma or post-surgical evaluation: Monitoring changes in the pulmonary vessels after chest injuries or surgeries.
Congenital anomalies: Detecting developmental abnormalities in the pulmonary arteries and veins.
 
Preparation:
Fasting: Avoid food and fluids for 4-6 hours before the procedure.
Pregnancy: Inform your doctor if you are pregnant or might be pregnant, as the procedure involves radiation.
Medications: Notify your doctor about all medications you are taking, as some may affect the results.
Metal Objects: Remove all metal jewelry, watches, and other metallic items to prevent artifacts on the images.
Contrast Medium Preparation: Blood tests may be required to assess kidney function, as the contrast medium is excreted through the kidneys.
 
Procedure:
The patient is positioned on the CT scanner table.
A contrast medium is injected into a peripheral vein to enhance the visualization of the pulmonary arteries.
The patient must remain still and may need to hold their breath briefly during the scan.
The CT scanner rotates around the patient, capturing a series of X-ray images.
The resulting images are processed and analyzed by a radiologist.