Biomedical Engineering GATE 2024 Questions with Answer
Ques 14 Biomedical Instrumentation
The Larmor frequency of a Na nucleus when placed in a magnetic field strength of 3 T is _______. (The gyromagnetic ratio of Na is given as gamma=11.26 MHz/T.) Give your answer in MHz rounded off to the nearest integer.
34 is the correct answer.
Ques 15 Biomedical Instrumentation
A Doppler ultrasound transducer operating at 5 MHz gave maximum output frequency shift of 3 kHz. The velocity of sound in blood is 1500 m/s If the probe was held at an angle of 45° to the direction of blood flow, the maximum velocity of blood flow through the artery is _______ m/s. (Give your answer rounded off to two decimal places.)
0.26 is the correct answer.
Ques 16 Biomedical Instrumentation
The wavelength of the peak emission from a human body at a temperature of 37°C due to black-body radiation is _______ µm. The value of Wien's displacement constant is 2.898×10-3 m. (Give your answer rounded off to 2 decimal places.)
9.35 is the correct answer.
Ques 17 Biomedical Instrumentation
Which of the following waveforms represents the output Vo of the circuit given below? The Zener diode used has a Zener breakdown voltage of 1 V and can be assumed ideal while in forward bias.
Ques 18 Biomedical Instrumentation
In magnetic resonance imaging (MRI), pulse repetition time (TR), time to echo (TE), T1 relaxation time, T2 relaxation time are some of the important pulse sequence design parameters. Which one of the following specifications is used for proton density weighted imaging?
Ques 19 Biomedical Instrumentation
Which one of the following events is NOT typically encountered in diagnostic X-ray projection radiography?
Ques 20 Biomedical Instrumentation
Which of the following statements is TRUE for a PET imaging system?
Ques 21 Biomedical Instrumentation
In a catheter-sensor system to measure blood pressure (P) as shown in the below figure, the liquid resistance (RL) of the catheter is due to friction between shearing molecules flowing through the catheter. Which of the following is TRUE for RL if only the radius of the catheter is doubled. Assume that the pressure difference across the catheter segment is fixed.
Ques 22 Biomedical Instrumentation
In the circuit below, what is the value if IL to transfer the maximum power to load?
Ques 23 Biomedical Instrumentation
A mechanical ventilator operating in volume controlled mode is set to deliver 600mL of tidal volume (TV) with a flow rate of 40 L/min. The frequency of breathing is set to 10 per minute. If the flow rate is doubled which one of the following is TRUE?
Ques 24 Biomedical Instrumentation
The X-ray attenuation coefficients as a function of photon energy for three materials are shown in the figure below. A tissue phantom containing these three materials is imaged at two different X-ray photon energies of 50 keV and 150 keV. When the developed X-ray film is viewed, which of the following statements is/are TRUE?
Ques 25 Biomedical Instrumentation
A DNA extract solution with a concentration of 15 ng/µL placed in a micro-cuvette of sample thickness 0.5 mm gave an absorbance of 0.24 at a wavelength of 260 nm in a spectrophotometer. After further concentration, the sample was found to give an absorbance of 0.38 at the same wavelength under identical conditions. The final concentration of the sample is _________ ng/µL. (Give your answer rounded off to 2 decimal places.)
23.75 is the correct answer.
Ques 26 Biomedical Instrumentation
An X-ray beam of initial intensity I0 of 70 keV imaging the chest is assumed to undergo attenuation through the muscle tissue for a thickness of 16 cm and further through the bone tissue for a thickness of 4 cm. The half value layer (HVL) thicknesses for the muscle and bone are 3.5 cm and 1.8 cm, respectively. The percentage of X-ray intensity transmitted through the body is _________ Give your answer rounded off to 2 decimal places.
1.76 is the correct answer.
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