4. 5. 6. 7. 8. 9. 3. 10 Q1/ Choose the most appropriate answer for each of the following statements: In regarding ESWL technique, . results by the shock wave pulse that causes a tensile create microbubbles in liquids like urine or blood. Hopkinson effect forces a. b. Shear forces c. Quasistatic squeezing d Cavitation 2. 1. transducer should be used. b. Focused array c. Curved array d. Phased array To get a sharp x-ray image, one of the following should be increased; a. Diameter of the focal spot To get a large field of view of US Imaging, a. Linear array b. Distance (patient-film) d. Width of blurring in value will affect the heart muscle function. 19 MA 120 mA c. Distance (x-ray tube-patient) Exposure to current with a. 9mA c. 50 mA a. Liquid-giass c. Thermistor b. d. thermometer is characterized by its large sensitivity to temperature changes. b. Thermocouple d. Both b and c The frequency that could be obtained by piezoelectric element with thickness 0.004cm is: a. 5 MHz C 500 MHz In regarding sonar, if the speed of sound in tissue is (1540 m/s) and the duration of the wave's return is (4.5 * 105 sec), the distance of the object will be: a. 3.47 * 102 cm 26 -0693 c. 6.93* 102 cm b. 3.47 cm d. 6.93 cm ZA The indirect method of blood pressure measurement is characterized by it is: a. Non-invasive c. No needing to use catheter In X-ray Imaging, a filter should be used to reduce: (20 marks) b. 50 MHz d. 5000 MHz -1540x41715 b. 2 d. 4 22= b. Not requiring entering the body All of the above d. d vt d- vat 1540 a. Hard x-ray b. Soft x-ray c. Absorbed x-ray by patient d. Both b and c The energy power that is emissive from the body is directly proportional with its temperature to the power of a. 1 c. 3 18 20 11 17 12 13 14 15 16 Seeback effect is produced when two metals with different a. Type are joint b. Electromotive force c. Voltage d. Temperature To detect the change in cancer mass size after two months of the last chemotherapy dose, it is preferred to use: a. A-Mode US c. M-Mode US-heart que The function of coupling system in ESWL machine is coupling between a. F1 and F2 Shock waves and skin c. Shock waves and stone All the choices are wrong When the pitch number = 1, this means that there is a. Small gaps C. No gaps Hounsfield number indicates to the sum of the tissues a. Attenuation c. Thicknesses The divergence of the Fraunhofer zone is determined by: a. Frequency of the produced US waves c. Velocity of sound in tissue In regarding US Doppler, one of the following is INCORRECT, a. It is used to measure the blood speed. c. Doppler Shift is measured by cm unit. a. Dynamic error c. Random error b. B-Mode US d. D-Mode US b. d. a. Removes soft x-rays c. Restricts scatter from outside of desired slice. 2 between CT image slices. b. Large gaps d. Overlap b. Densities d. Both a and b b. During US test, there is 2 Doppler shi. d. Doppler shift is the difference transmitted and received US waves. When the measurement system cannot detect the change in the input signal, the resultant error called as at the ends. b. Diameter of the transducer d. None of the above 19 In regarding thermocouple thermometer, the value of voltage that is produced as a result to Seeback Effect is based on: a. Length of wires c. Mass of junction In regarding CT, collimator is used to: b. Systematic error d. Quantization error b. kinds of metals d. None of the above b. Lowers radiation dose to patient. d. Both c and b.