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ARDMS Exam SPI Topic 2 Question 11 Discussion
Actual exam question for
ARDMS's
Sonography Principles and Instrumentation exam
Question #: 11
Topic #: 2
[All Sonography Principles and Instrumentation Questions]
Topic #: 2
What is the effect of an increased aperture in a linear array transducer?
Suggested Answer:
A
The aperture of a transducer is the active area that emits and receives the ultrasound waves. In a linear array transducer, increasing the aperture (using more elements for transmission and reception) results in a deeper focus because the beam is more tightly focused over a longer distance. This improves lateral resolution at greater depths, as the ultrasound beam maintains a narrower width for a longer distance. It allows for better imaging of deeper structures without sacrificing resolution.
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.
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