Radiographic contrast in computed radiography may be adjusted by changing:

Radiographic contrast in computed radiography may be adjusted by changing:

• A. Window level
• B. Window width
• C. Area of the patient being irradiated
• D. Imaging plate

Answer: (B)

In computed radiography, you control how the image looks after it’s captured by adjusting windowing, which maps the recorded pixel values to the displayed grayscale. The window width is the range of pixel values that are shown as the gradations from black to white. A narrower window width compresses that range into fewer shades, making differences in tissue density more pronounced and therefore increasing contrast. A wider window width expands the range, reducing contrast. So adjusting window width directly changes the image’s contrast. Window level, on the other hand, shifts the midpoint of the displayed range and affects overall brightness or density, not the contrast itself. The area of the patient irradiated and the imaging plate influence exposure and noise and can affect image quality, but they don’t set the displayed contrast in post-processing the way window width does.

In computed radiography, you control how the image looks after it’s captured by adjusting windowing, which maps the recorded pixel values to the displayed grayscale. The window width is the range of pixel values that are shown as the gradations from black to white. A narrower window width compresses that range into fewer shades, making differences in tissue density more pronounced and therefore increasing contrast. A wider window width expands the range, reducing contrast. So adjusting window width directly changes the image’s contrast.

Window level, on the other hand, shifts the midpoint of the displayed range and affects overall brightness or density, not the contrast itself. The area of the patient irradiated and the imaging plate influence exposure and noise and can affect image quality, but they don’t set the displayed contrast in post-processing the way window width does.