18 Questions
Increasing the matrix size in digital imaging results in a larger pixel size and better spatial resolution.
False
Each pixel in a digital image with a bit depth of 3 can have 8 different gray levels.
True
A voxel in the context of imaging refers to the brightness level assigned to a pixel.
False
Higher bit depth in digital imaging results in higher spatial resolution.
False
The appearance of a digital image is not affected by the matrix size or the bit depth.
False
Contrast resolution in digital imaging is influenced by factors such as pixel size and voxel information.
True
Increasing the matrix size for the same field of view (FOV) will result in larger pixel sizes and poorer spatial resolution.
False
A smaller field of view (FOV) without changing the matrix size will lead to larger pixel sizes and better spatial resolution.
False
The bit depth of an image determines the number of shades of gray, affecting the density resolution.
True
The process of scanning involves dividing the image into an array of pixels.
True
Sampling involves converting the analog signal from the photomultiplier into a digital image for computer processing.
False
Quantization assigns a specific integer value, called a gray level, to the brightness levels obtained during sampling.
True
Digital images are represented as a collection of discrete pixels or voxels, with each pixel or voxel assigned a numerical value representing its intensity or color.
True
The appearance of digital images, such as sharpness and contrast, is primarily determined by the spatial resolution and bit depth of the imaging system.
True
In digital imaging, spatial resolution is measured in bits per inch (bpi).
False
Higher bit depth in digital imaging results in improved contrast resolution and a wider range of displayable intensity or color levels.
True
Voxels are three-dimensional pixels used to represent volumetric data, such as in computed tomography (CT) or magnetic resonance imaging (MRI) scans.
True
In digital imaging, higher spatial resolution always results in better image quality, regardless of the bit depth.
False
Test your knowledge on MRI imaging, pixel size calculations, tissue characteristics, and the impact of matrix size on spatial resolution. Learn about pixels, voxels, and the relationship between FOV, matrix size, and pixel size in digital imaging modalities.
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