Biomedical Instrumentation Quiz

Which of the following is defined as how closely an instrument's reading approaches the true value of the variable being measured?

• Precision

• Sensitivity

• Accuracy

• Linearity

What is the ability of an instrument to display the original biosignal with high fidelity called?

• Signal-to-Noise ratio

• Frequency response

• Stability

• Sensitivity

Mechanical friction in an analog indicating meter that causes the movement of the indicating needle to lag behind corresponding changes in the measured variable is known as:

• Linearity

• Hysteresis

• Stability

• Precision

What is the primary purpose of electrical isolation in medical instruments?

• To increase linearity

• To prevent electrical shock to the patient and experimental animals

• To improve frequency response

• To reduce hysteresis

An instrument is considered linear if its sensitivity remains constant throughout its entire input range. This describes which design factor?

• Accuracy

• Sensitivity

• Linearity

• Stability

The ability of an instrument to detect even a very small change in the measured input is referred to as its:

• Precision

• Sensitivity

• Signal-to-Noise ratio

• Frequency response

What does the Signal-to-Noise ratio (S/N) indicate in biomedical instruments?

• The linearity of the output signal

• How much larger the magnitudes of the biosignals are compared to the input noise

• The stability of the instrument over time

• The speed at which the instrument responds to changes

Why should a medical instrument be designed simply?

• To increase its sensitivity

• To minimize errors in operation and maintenance

• To improve its frequency response

• To enhance its precision

The ability of an instrument to maintain a constant output for a given input, regardless of variations due to amplifier changes or drift, is known as:

• Linearity

• Sensitivity

• Stability

• Accuracy

Which design factor is a measure of the reproducibility of measurements and indicates the conformity of the degree of agreement within a group of measurements?

• Precision

• Accuracy

• Sensitivity

• Linearity