American Registry of Radiologic Technologists (ARRT) Practice Exam

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Prepare for the American Registry of Radiologic Technologists Test with engaging quizzes and detailed explanations. Boost your test readiness with multiple-choice questions designed to enhance your knowledge and confidence.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What type of relationship exists between recorded detail and SID?

Indirect
Exponential
Direct
Inverse

The correct answer is: Direct

The relationship between recorded detail and source-to-image distance (SID) is direct. This means that as the SID increases, the recorded detail also improves. When the distance between the x-ray tube (the source) and the image receptor increases, the x-ray beam spreads out less as it travels to the detector. This results in a sharper image with finer detail because the geometric unsharpness is reduced. With a larger distance, the effects of any motion or positioning inaccuracies are minimized, contributing further to enhanced image clarity. In practice, this concept is essential for radiologic technologists to understand, as adjusting the SID can be a technique utilized to optimize image quality during various imaging procedures. The correlation between SID and detail is a fundamental principle in radiography that influences exposure factors, positioning, and overall image quality.