Bontragers Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John Lampignano Test Bank

Test Bank Bontrager's Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John LampignanoTest Bank Bontrager's Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John LampignanoTest Bank Bontrager's Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John LampignanoTest Bank Bontrager's Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John LampignanoTest Bank Bontrager's Textbook of Radiographic Positioning and Related Anatomy, 9th Edition by John Lampignano 36. A radiograph of a submentovertex projection of the cranium reveals that the mandibular condyles are projected into the petrous pyramids. What must be altered during the repeat exposure to produce a more diagnostic radiograph? a. Increase the extension of the skull. b. Increase the flexion of the skull. c. Decrease the CR angulation. d. None of the above; it is an acceptable image. ANS: A REF: 439 37. A radiograph of a lateral projection of the cranium reveals that the orbital roofs (plates) are not superimposed—one is slightly superior to the other. Which of the following positioning errors led to this radiographic outcome? a. Rotation b. Tilt c. Excessive flexion d. Excessive extension ANS: B REF: 412 | 418 | 436 38. A radiograph of a lateral cranium reveals that the mentum was cut off from the bottom of the radiograph. A 24  30-cm (10  12-inch) IR was used, and it was placed crosswise. What must be altered if a repeat exposure is performed? a. Center the CR at the EAM. b. Increase SID to reduce magnification. c. Place the 24  30-cm (10  12-inch) IR lengthwise. d. None of the above; all of the structures were demonstrated. ANS: D REF: 411 39. Lesions of decreased density are termed osteoblastic lesions. a. True b. False ANS: B REF: 400 40. Both CT (computed tomography) and MRI (magnetic resonance imaging) can provide reconstructed images in three planes: axial, sagittal, and coronal. a. True b. False ANS: A REF: 409 41. A patient comes to radiology for a routine study of the cranium. He is unable to flex his head and neck sufficiently to place the OML perpendicular to the IR for the AP axial projection. What should the technologist do to compensate for this problem without creating excessive magnification of the occipital bone? a. Use the inferior OML and increase the CR angulation by 7. b. Perform the Haas method. c. Perform a submentovertex projection in place of the AP axial projection. d. Use the AML and increase the CR angulation by 10.