Answer Happy

9:53 il 5GT Back BMED3501_2A_2021.... 1-15. Which statement is correct in nuclear medicine imaging? a. Radioactive tracers should have as short half-life as possible. BMED3501 Page 4 of 9 b. Radioactive tracers should have as long half-life as possible C. Both statements above are wrong. a 1-16. Which statement is NOT true in PET imaging? Nowadays clinical PET scanner is often integrated with CT scanner as PET/CT scanner, b. Nowadays clinical PET scanner is sometimes integrated with MRI scanner as PET/MRI. c. Nowadays clinical PET scanner is sometimes integrated with SPECT scanner as PET/SPECT scanner 1-17. Which statement is NOT true for single disc element ultrasound transducer? a. The larger the disc diameter, the less divergent the ultrasound beam. b. The higher the frequency, the less divergent the ultrasound beam. c. Ultrasound beam divergency is not affected by disc diameter and frequency. 1-18. Which statement is true regarding ultrasound attenuation in biological tissue? a. The higher the ultrasound frequency, the stronger the attenuation. b. The higher the ultrasound frequency, the weaker the attenuation. c. Ultrasound attenuation does not depend on frequency 1-19. Which statement is NOT true regarding ultrasound B-mode imaging? a. B-mode imaging cannot perform real-time imaging and obscrve organ motions. b. B-mode imaging utilizes short ultrasound pulses, i.c., few cycles of pressure waves. c. Modern B-mode imaging often utilizes linear or phase array transducers for ultrasound generation and detection 1-20. The Fourier transform of a 2D comb function with horizontal and vertical spacing of Ax and Ay (as shown below) is also a 2D comb function with corresponding spacing of У AX ду X