MRI Imaging and Pixel Calculations Quiz
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Questions and Answers

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.

<p>False</p> Signup and view all the answers

The appearance of a digital image is not affected by the matrix size or the bit depth.

<p>False</p> Signup and view all the answers

Contrast resolution in digital imaging is influenced by factors such as pixel size and voxel information.

<p>True</p> Signup and view all the answers

Increasing the matrix size for the same field of view (FOV) will result in larger pixel sizes and poorer spatial resolution.

<p>False</p> Signup and view all the answers

A smaller field of view (FOV) without changing the matrix size will lead to larger pixel sizes and better spatial resolution.

<p>False</p> Signup and view all the answers

The bit depth of an image determines the number of shades of gray, affecting the density resolution.

<p>True</p> Signup and view all the answers

The process of scanning involves dividing the image into an array of pixels.

<p>True</p> Signup and view all the answers

Sampling involves converting the analog signal from the photomultiplier into a digital image for computer processing.

<p>False</p> Signup and view all the answers

Quantization assigns a specific integer value, called a gray level, to the brightness levels obtained during sampling.

<p>True</p> Signup and view all the answers

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.

<p>True</p> Signup and view all the answers

The appearance of digital images, such as sharpness and contrast, is primarily determined by the spatial resolution and bit depth of the imaging system.

<p>True</p> Signup and view all the answers

In digital imaging, spatial resolution is measured in bits per inch (bpi).

<p>False</p> Signup and view all the answers

Higher bit depth in digital imaging results in improved contrast resolution and a wider range of displayable intensity or color levels.

<p>True</p> Signup and view all the answers

Voxels are three-dimensional pixels used to represent volumetric data, such as in computed tomography (CT) or magnetic resonance imaging (MRI) scans.

<p>True</p> Signup and view all the answers

In digital imaging, higher spatial resolution always results in better image quality, regardless of the bit depth.

<p>False</p> Signup and view all the answers

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