What does increasing tube current in fluoroscopy primarily improve?

Increasing tube current in fluoroscopy primarily improves image brightness. The tube current, measured in milliamperes (mA), directly influences the amount of radiation produced by the x-ray tube. When the tube current is increased, more x-ray photons are generated, which leads to a denser image on the detector or image receptor. This results in brighter images, making it easier for the operator to visualize anatomical structures and assess any potential issues.

A brighter image is particularly beneficial in fluoroscopy, where real-time imaging is essential for various medical procedures. It allows for better detail and contrast, which is crucial when navigating complex anatomical regions. While increasing the tube current can affect other aspects of the imaging process, such as the overall exposure time, the primary benefit observed is an improvement in image brightness.