What is the purpose of Automatic Tube Current Modulation (ATCM)?

The purpose of Automatic Tube Current Modulation (ATCM) is to minimize patient radiation dose during CT scans. ATCM adjusts the amount of radiation used based on the density and composition of the tissues being imaged. By modulating the tube current, the system can use a higher current when imaging denser structures (such as bone) and reduce it when imaging less dense tissues (like air-filled spaces). This tailored approach helps ensure that the minimum necessary radiation dose is delivered for each specific scan without compromising the diagnostic quality of the images.

In contrast, while enhancing image quality, increasing scan speed, and improving contrast resolution are important aspects of CT imaging, they are not the primary objective of ATCM. The main goal of this technique revolves around optimizing patient safety by reducing unnecessary radiation exposure.