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RAD 120 Exam 2

Part 3

QuestionAnswer
Why is the exposure made at the end of the second full inspiration when performing routine chest radiography? To move the diaphragm down and prevent distortion
The X-ray tube is on top during C-arm procedures, this results in? 1.) Increased OID 2.) Increased scatter 3.) Decreased image resolution
What is the best way that a radiologic technologist can reduce their occupational exposure to radiation while performing mobile radiography? Stand behind the intensifier
What is in each radiographic room and on mobile units? Radiographic technique charts
What's most important to a radiologic technologist when they're working with Fluoroscopy/Mobile radiology equipment? Protective apparel
Where should the radiologic technologist place the cathode while examining a patient's thoracic spine using mobile radiography? Over the lower thoracic vertebrae
What should the radiologic technologist do first when performing chest radiography on a patient using a mobile x-ray unit? Rotate the patient's arm internally
What will increase radiation exposure to the face and neck region of the operator standing next to the C-arm by approximately a factor of 4? A 30° tilt of the C-arm x-ray tube from the vertical position
A patient enters the ED with a possible shoulder dislocation. Because of his multiple injuries, the patient is unable to stand or sit erect What position/projection will best demonstrate the dislocation? AP and horizontal beam transthoracic lateral projections
A patient enters the ED on a backboard with multiple injuries, including an injury to the knee region with a possible stellate fracture noted on the examination requisition What position/projection will best demonstrate this injury safely? AP and horizontal beam lateral projections of the knee and patella without knee flexion
Ideally, the horizontal beam lateral projections for the abdomen require a? 40- to 44-inch SID
What CR position is required when performing a horizontal beam lateral lumbar spine projection? Perpendicular to the vertebral column
What will best demonstrate an intracranial air-fluid level with the patient recumbent? Horizontal beam lateral
A greenstick fracture usually affects? Pediatric patients
Using a grid on unstable surface may cause absorption of primary beam, this is known as? Grid Cutoff
Longer SID requires increased? mAs
Increased mAs results in? Longer exposure time
What are the principles of performing mobile examinations? 1.) Two projections - 90 degrees to each other with true CR- part-IR alignment 2.) True AP/PA and a true lateral – to include both joints 3.)Include as much information as possible as to how the image was achieved
Using an IR cover makes positioning easier because? The cover does not stick to skin
When maneuvering the C-Arm, positioning the Image Intensifier on top results in? Decreases OID and scatter, While Increasing resolution
What is generally regarded as the best position for the C-Arm to be in? Image Intensifier on top
Created by: user-2016295
 

 



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