when evaluating heavily calcified arteries what system settings should be increased to improve the demonstration of flow in the vessels? A. frequency and output power B. color gain and angle of insolation C. velocity scale persistence D. persistence and sensitivity {Ans: D. persistence and sensitivity}If an ellispe is used to document the area of structure, what unit will be used to report the measurement? A. cm 2 B. cm C. cm 3 D. cm/s {Ans: A. cm 2}you switch from a 5 MHz curved probe to a 2.5 MHz sector probe to image deeper in the abdomen. How is the attenuation rate affected by the change to the new probe? A. decreases by 25% B. decreases by 50% C. doubles D. increases by 4 times {Ans: B. decreases by 50%}Apodization is a function of the: A. image former B. image processor C. beam former D. signal processor {Ans: C. beam former}The rectus abdominis muscles are associated with ____, while the diaphragm is associated with ______. A. shadowing, enhancement B. comet tail, ring down C. refractive shadowing, lobe artifact D. refraction artifact, mirror image artifact {Ans: D. refraction artifact, mirror image artifact}edge enhancement, pixel interpolation, persistence,