What tube-detector geometry is used by third generation CT scanners?

Third generation CT scanners utilize rotate-rotate tube-detector geometry, which is characterized by both the X-ray tube and detector array rotating continuously around the patient. This method allows for a more efficient data acquisition process, enabling the scanner to collect a large amount of data in a shorter time compared to older generations. The continuous rotation results in the ability to generate images with higher resolution and improved contrast, as well as reducing motion artifacts that can arise from patient movement during the scanning process.

In rotate-rotate geometry, as the X-ray tube emits X-rays, the detectors simultaneously capture the images from different angles. This dual rotation creates a comprehensive dataset that enhances image reconstruction algorithms, leading to more accurate and detailed cross-sectional images of the body. This advanced technology not only improves the speed of the scanning process but also the overall quality of the images produced, which is crucial for effective diagnosis and treatment planning.