What is maximum ultrasound intensity of narrow beam transducer?(a) 15 mW/cm^2(b) 20 mW/cm^2(c) 25 mW/cm^2(d) 30 mW/cm^2I got this question during an internship interview.Origin of the question is Oximeters topic in division Oximeters of Biomedical Instrumentation

What is maximum ultrasound intensity of narrow beam transducer?(a) 15

1.	What is maximum ultrasound intensity of narrow beam transducer?(a) 15 mW/cm^2(b) 20 mW/cm^2(c) 25 mW/cm^2(d) 30 mW/cm^2I got this question during an internship interview.Origin of the question is Oximeters topic in division Oximeters of Biomedical Instrumentation
Answer» The CORRECT answer is (c) 25 mW/cm^2 For explanation: The narrow BEAM TRANSDUCER uses a single ultrasound transmitter/receiver piezo-electric crystal pair. The maximum ultrasound intensity is generally kept below 25 mW/cm^2. The typical transducer diameter is 25 mm. The narrow beam transducer is very sensitive and produces a good trigger signal for INSTANTANEOUS heart rate determination.

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What is maximum ultrasound intensity of narrow beam transducer?(a) 15 mW/cm^2(b) 20 mW/cm^2(c) 25 mW/cm^2(d) 30 mW/cm^2I got this question during an internship interview.Origin of the question is Oximeters topic in division Oximeters of Biomedical Instrumentation

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