LRA 224 final Exam | Questions & 100% Correct Answers (Verified) | Latest Update | Grade A+

The chin is extended for a lateral projection of the cervical spine to: : Prevent superimposition of the mandible upon the spine A radiograph of a left posterior oblique (LPO) projection of the lumbar spine reveals that the downside pedicle is projected too far posterior on the vertebral body. What specific positioning error is present on this radiograph? : Excessive rotation of the spine The anterior oblique (RAO and LAO) positions of the lumbar spine will demonstrate the zygapophyseal joints closes to the image receptor : False If the waist is supported properly, an average-size patient does not require any CR angulation for the lateral lumbar spine projection. : True An abnormal lateral curvature of the spine is a congenital condition termed : Scoliosis A patient comes to radiology for a follow-up study of the lumbar spine. The patient had a spinal fusion performed at the l3-l4 level months earlier. Which of the following would best demonstrate the degree of movement at the fusion site? 2 | P a g e : Lateral flexion/extension Which of the following is NOT a correct evaluation criterion for the AP axial C spine projection? : All of the above are the correct criteria How many separate bones make up the adult thoracic vertebral column? : 12 A key advantage of a posteroanterior (PA) projection taken during a pediatric scoliosis study as compared with the AP projection is that it reduces : breast and thyroid dose by 90% What CR angle should be used for a lateral sacrum/coccyx projection? : None. The CR is perpendicular to the IR A radiograph of an AP open-mouth projection receals that the base of the skull is superimposed over the dens. What positioning error led to this radiographic outcome? : Excessive extension the skull A radiograph of a lateral thoracic spine reveals that there is excessive density along the posterior aspect of the spine. Even with good collimation, the scatter radiation reaching the image receptor obscures the spinous processes. What can the technologist do to improve the visibility of the posterior elements of the spine? : Place lead blocker on tabletop posterior to the patient An RPO position of the cervical spine requires 45 degree oblique of the body with a : 15 degree cephalad angl