Which two variable changes are expected to improve contrast resolution of CT scans?

Improving contrast resolution in CT scans is crucial for distinguishing between different types of tissues and identifying pathology. The correct choice highlights how adjustments in kilovoltage peak (kVp) and milliamperage (mA) directly affect the quality of the image produced.

Increasing kilovoltage peak (kVp) enhances the energy of the X-ray beam. A higher kVp leads to greater penetration through the tissues, resulting in more uniform exposure and a more effective range of contrast between different tissue densities. While a very high kVp can reduce contrast by diminishing the differences between tissue densities, optimal kVp settings can improve the range of contrast resolution significantly.

Increasing milliamperage (mA) affects the quantity of X-ray photons produced during the scan. This increase enhances the overall signal-to-noise ratio in the image. A higher mA provides more photons, allowing for better image quality with reduced noise. This leads to improved visualization of subtle differences in tissue contrast, particularly important in detecting small lesions or vascular structures.

Together, these variables work synergistically to create images with improved contrast resolution, which is vital for accurate diagnosis and assessment.

In contrast, while increased matrix size and modifications to display field-of-view (DFOV) can impact image