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CTPA was introduced in the 1990s as an alternative to ventilation/perfusion scanning (V/Q scan), which relies on radionuclide imaging of the blood vessels of the lung. It is regarded as a highly sensitive and specific test for pulmonary embolism. [1] CTPA is typically only requested if pulmonary embolism is suspected clinically.
The following is a complete list of 25 metropolitan areas in Texas, as defined by the United States Office of Management and Budget. The largest two are ranked among the top 10 metropolitan areas in the U.S. Some metropolitan areas contain metropolitan divisions. Two metropolitan divisions exist within the Dallas–Fort Worth–Arlington MSA.
Texas population density map As of May 2024, the 1,225 Texas municipalities [ 3 ] [ a ] include 971 cities , 231 towns , and 23 villages . These designations are determined by United States Census Bureau requirements based on state statutes and may not match a municipality's self-reported designation. [ 4 ]
English: The cities and counties in or near the Texas Triangle, a megaregion of the US state of Texas. City names in bold in the map legend are in the top 10 most populous Texas cities. City names in bold in the map legend are in the top 10 most populous Texas cities.
Selective pulmonary angiogram revealing significant thrombus (labelled A) causing a central obstruction in the left main pulmonary artery. Pulmonary angiography (or pulmonary arteriography,conventional pulmonary angiography, selective pulmonary angiography) is a medical fluoroscopic procedure used to visualize the pulmonary arteries and much less frequently, the pulmonary veins.
While only about 20% of Texas counties are generally located within the Houston—Dallas—San Antonio—Austin areas, they serve a majority of the state's population with approximately 22,000,000 inhabitants. Texas was originally divided into municipalities (municipios in Spanish), a unit of local government under Spanish and Mexican rule.
Computed tomography angiography (CTA) is a type of contrast CT to visualize the arteries and veins throughout the body. [47] This ranges from arteries serving the brain to those bringing blood to the lungs, kidneys, arms and legs. An example of this type of exam is CT pulmonary angiogram (CTPA) used to diagnose pulmonary embolism (PE).
Computed tomography angiography (also called CT angiography or CTA) is a computed tomography technique used for angiography—the visualization of arteries and veins—throughout the human body. Using contrast injected into the blood vessels, images are created to look for blockages, aneurysms (dilations of walls), dissections (tearing of walls ...