Spiral CT is a type of computed tomography CT scan. It is being used more and more in medical centers across the country to diagnose lung cancer. Spiral CT uses a faster machine that spins continuously around the body. This allows it to more quickly detect images and spot problems. It can also detect small nodules early-stage lung disease that cannot be clearly seen on chest x-rays.
Another advantage of spiral CT is that it delivers a lower dose of radiation than traditional CT scans. Spiral CTs also can be used to look for masses in the adrenal glands, brain and other organs that may be affected if lung cancer has spread.
Sequential scanning step-and-shoot acquisition is still used in some situations e. The radiation dose administered during helical acquisition depends on the speed of the patient through the scanner, also known as the pitch.
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