Samsung MySono U5 Manual de usuario descargar pdf (Pagina 163)

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Chapter 5 Measurements and Calculations

5-3

Measurement Accuracy

Measurement values can vary, depending on the nature of the ultrasound, the body’s response to

ultrasound, the measurement tools, algorithms, product settings, probe type and user operation.

Before using this product, make sure to read and understand the following information regarding the

causes of measurement errors, and the methods for optimizing measurements.

Causes of Measurement Errors

Image Resolution

The resolution of ultrasound images may be limited by the available space.

X Errors due to the signal range can be minimized by adjusting focus settings. You can increase the

resolution of the measurement area by optimizing the focus settings.

X In general, lateral resolution is lower than axial resolution. Therefore, measurements should be

taken along the axis of the ultrasound beam for more accurate values.

X Gain has a direct impact on resolution. Gain can be adjusted by using the Gain button for each

mode.

X In general, increasing the ultrasound frequency enhances resolution.

Pixel Size

X An ultrasound image is made up of pixels.

X Since a single pixel represents the basic unit of an image, a measurement error may result in the

displacement of approximately ±1 pixel when compared to the original image size.

X However, this error becomes signicant only when a small distance in an image is measured.

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Samsung MySono U5 Manual de usuario Pagina 163

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