Computed Tomography Technologist Practice Exam

Question: 1 / 615

In CT, what is the primary purpose of a line-pair phantom?

Testing dose distribution

Testing spatial resolution

The primary purpose of a line-pair phantom in CT imaging is to assess spatial resolution. Spatial resolution refers to the ability of the imaging system to distinguish between closely spaced objects or to discern small details in an image. Line-pair phantoms are designed with alternating lines, typically black and white, spaced at various intervals. By evaluating the smallest line pairs that can be seen clearly on the image, technicians can quantify the spatial resolution of the CT system being tested.

This capability is crucial because higher spatial resolution allows for better differentiation of structures within the scanned area, leading to more accurate diagnoses. Proper testing using a line-pair phantom ensures that the CT system is functioning optimally and can produce high-quality images necessary for effective patient care.

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Testing image noise

Testing color resolution

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