Which factor does NOT determine temporal resolution in CT?

In evaluating the factors that influence temporal resolution in CT imaging, it is important to understand how each element interacts with the imaging process. Temporal resolution refers to the ability of a CT scan to differentiate small time intervals, which is crucial when imaging moving structures, such as the heart.

The gantry rotation speed significantly influences temporal resolution because faster rotation allows for quicker acquisition of data, thus capturing moving anatomy more effectively. The number of detector channels also plays a role, as more channels enable simultaneous data collection from different angles, enhancing temporal resolution by reducing the time needed for image acquisition. The speed of recording changing signals directly impacts how swiftly the system can process those signals to produce images, further enhancing temporal accuracy.

However, patient anatomy does not inherently affect temporal resolution. While the complexity of anatomy may introduce challenges in imaging, it does not change the fundamental capabilities of the CT system to resolve temporal events. In essence, the structures being imaged do not dictate the speed or resolution at which temporal data can be acquired by the scanning system. This distinction is crucial for understanding which elements actually contribute to temporal resolution in CT, validating the choice that patient anatomy is not a determining factor.