Ace Your SPI ARDMS SPI Exam

Comprehensive and Detailed Explanation From Exact Extract:

Axial resolution depends on spatial pulse length (SPL), which is determined by the number of cycles per pulse. Fewer cycles per pulse shorten the SPL, thereby improving axial resolution and allowing better separation of closely spaced structures along the beam axis.

According to sonography instrumentation reference:

“Axial resolution improves with fewer cycles per pulse, which decreases the spatial pulse length and allows better discrimination of structures along the beam path.”

Therefore, the correct answer is B: Reducing the number of cycles per pulse.

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Comprehensive and Detailed Explanation From Exact Extract:

In color Doppler imaging, the default color map assigns red and blue to represent flow direction relative to the transducer (usually red toward, blue away). The color invert control reverses this assignment.

According to sonography Principles and Instrumentation:

"The color invert control reverses the baseline of the color map, swapping red and blue assignments for flow direction."

Color priority adjusts the overlay of color vs grayscale.

Color gain controls amplification of the Doppler signal.

Color threshold sets minimum amplitude to display color.

Therefore, the correct answer is D: Color invert.

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Compression in ultrasound imaging adjusts the range of grayscale displayed, affecting the contrast resolution.

This function allows sonographers to enhance the differentiation between structures of varying echogenicities.

By modifying the contrast resolution, sonographers can better visualize subtle differences in tissue composition and improve the diagnostic quality of the images.

Increasing contrast resolution is particularly important in differentiating between fluid-filled cysts and solid masses.References:

ARDMS Sonography Principles and Instrumentation guidelines on image processing and contrast resolution.