What represents the ability of a detector to capture transmitted x-ray quanta?

The ability of a detector to capture transmitted x-ray quanta is best represented by inherent absorption efficiency. This refers to the effectiveness of a detector in absorbing x-ray photons that pass through a body and converting them into a measurable signal. A higher absorption efficiency means that more of the x-ray quanta are captured and converted into electrical signals, resulting in improved image quality.

Inherent absorption efficiency plays a critical role in the overall performance of a CT system, as it directly influences the detector's ability to produce accurate and high-quality images. This characteristic is important for optimizing the contrast and clarity of images, allowing for better diagnosis.

Although image resolution, signal-to-noise ratio, and contrast resolution are all important parameters in CT imaging, they do not directly reflect the ability of a detector to capture x-ray quanta. Image resolution pertains to the detail and sharpness of an image, signal-to-noise ratio refers to the proportion of useful information to background noise, and contrast resolution involves the ability to differentiate between different tissue types based on their density. While these factors depend on the detector's performance, they do not themselves define the detector's inherent absorption efficiency.