American Society of Radiologic Technologist (ASRT) Practice Exam

Question: 1 / 400

What is the primary cause of decreased spatial resolution on radiographs?

Failure to use a grid

Incorrect milliampere-seconds (mAs)

Patient motion

The primary cause of decreased spatial resolution on radiographs is patient motion. When a patient moves during the exposure of the radiograph, this movement can lead to blurring of the image. This blurriness results from the superimposition of multiple images as the radiation is recorded, effectively reducing the clarity and detail that can be visualized in that particular area of the radiograph.

Spatial resolution refers to the ability of the imaging system to differentiate between small structures. In radiography, careful positioning and minimizing any movement during the exposure are critical for maintaining high spatial resolution. If a patient cannot remain still or if there is any unintentional movement, it will significantly impact the fidelity of the captured image, leading to a loss of detail and clarity.

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Improper kilovoltage peak (kVp) selection

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