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Image Analysis I Test 1, Exams of Radiography

A.T. Still University of Health Sciences (ATSU)Radiography

Image Analysis I Test 1 Image Analysis I Test 1

Typology: Exams

2023/2024

Available from 06/23/2024

CarlyBlair
CarlyBlair 🇺🇸

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Image Analysis I Test 1
The demographic requirements for radiographic images include all the following except: -
technologist's identification
Good collimation practices will do all the following except
-decrease radiation dosage.
-affect the amount of scatter radiation that reaches the IR.
-reduce the visibility of recorded details.
-reduce digital radiography histogram analysis errors. -
reduce the visibility of recorded details
Elongation occurs in all the following situations, except when -
the central ray and IR are perpendicular and the part is angled
Two images were obtained on the same structure. Image 1 was obtained using a 48-inch source-image
receptor distance (SID) and a 5-inch object-image receptor distance (OID), and image 2 was obtained
using a 48-inch SID and a 3-inch OID.
Which image will demonstrate greater size distortion? -
image 1
Which technical factor listed below is primarily used to regulate density? -
mAs
Which of the following technical factors is primarily used to regulate contrast? -
kVp
The following are true about double-exposed screen-film images except: -
They demonstrate adequate density because the system will adjust for the increased exposure.
The light collected and converted to an electrical signal by the photomultiplier tube (PMT) during CR
image sampling is then sent to the ________________ to be digitized. -
ADC (analog-to-digital converter)
Match each of the following with its location on a histogram graph.
Air/gas -
right
Match each of the following with its location on a histogram graph.
Background brightness -
Far Right
Match each of the following with its location on a histogram graph.
pf3
pf4
pf5
pf8
pf9

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Image Analysis I Test 1

The demographic requirements for radiographic images include all the following except: - technologist's identification Good collimation practices will do all the following except -decrease radiation dosage. -affect the amount of scatter radiation that reaches the IR. -reduce the visibility of recorded details. -reduce digital radiography histogram analysis errors. - reduce the visibility of recorded details Elongation occurs in all the following situations, except when - the central ray and IR are perpendicular and the part is angled Two images were obtained on the same structure. Image 1 was obtained using a 48-inch source-image receptor distance (SID) and a 5-inch object-image receptor distance (OID), and image 2 was obtained using a 48-inch SID and a 3-inch OID. Which image will demonstrate greater size distortion? - image 1 Which technical factor listed below is primarily used to regulate density? - mAs Which of the following technical factors is primarily used to regulate contrast? - kVp The following are true about double-exposed screen-film images except: - They demonstrate adequate density because the system will adjust for the increased exposure. The light collected and converted to an electrical signal by the photomultiplier tube (PMT) during CR image sampling is then sent to the ________________ to be digitized. - ADC (analog-to-digital converter) Match each of the following with its location on a histogram graph. Air/gas - right Match each of the following with its location on a histogram graph. Background brightness - Far Right Match each of the following with its location on a histogram graph.

Bone - left Match each of the following with its location on a histogram graph. Contrast/metal - left Match each of the following with its location on a histogram graph. Fat - right Match each of the following with its location on a histogram graph. Soft tissue - center All the following will result in histogram analysis errors except: -unusual pathologic conditions. -poor positioning. -motion. -alignment of the anatomic part with the IR. - motion All the following are guidelines for producing optimal image histograms except: -Choose the correct body part and projection from the workstation menu. -Leave minimal background in the exposure field through tight collimation. -Use the smallest possible IR and cover at least 50% of it. -Erase the imaging plate if the IR has not been used for a few days. - Use the smallest possible IR and cover at least 50% of it. The exposure indicator number represents all the following except: -the amount of light given off by the imaging plate. -the amount of exposure to the patient. -the amount of exposure to the imaging plate. -the measure of dose to the patient. - the measure of dose to the patient At what level is the exposure indicator reading taken on the VOI? - Halfway between S1 and S The _____________ is used in DR systems to monitor radiation output and dose to the patient. - dose-area product (DAP) All the following are true about display station resolution, except that: -it refers to the maximum number of pixels that the screen can demonstrate. -full display resolution is only possible if the digital and display systems have equal pixel capability.

A PA chest projection obtained with the patient rotated into an RAO position demonstrates

  1. 1 inch (2.5 cm) of the apical lung field above the clavicles.
  2. the vertebral column superimposed over the left sternoclavicular (SC) joint.
  3. elevated lateral clavicular ends.
  4. the left posterior ribs with greater length than the right posterior ribs. - 1 and 4 A PA chest projection with poor positioning demonstrates the scapulae in the lung field and elevated lateral clavicular ends. How should the patient be repositioned for an optimal projection to be obtained?
  5. Tilt the upper midcoronal plane away from the IR.
  6. Depress the shoulders.
  7. Coax the patient into a deeper inspiration.
  8. Anteriorly rotate the shoulders and elbows. - 2 and 4 For a left lateral chest projection with accurate positioning, the
  9. SID is set at 40 inches (102 cm).
  10. humeri are positioned vertically.
  11. shoulders, posterior ribs, and posterior pelvic wings are aligned perpendicular to the image receptor (IR).
  12. midsagittal plane is aligned perpendicular to the IR. - 2 and 3 A left lateral chest projection with accurate positioning demonstrates
  13. no humeral soft tissue in the lung field.
  14. no more than a total of 0.5 inch (1 cm) of space between the posterior and/or anterior ribs.
  15. the right hemidiaphragm inferior to the left hemidiaphragm.
  16. the hemidiaphragms inferior to the eleventh thoracic vertebra. - 1,2, and 4 Which of the following pertains to a lateral chest projection with accurate positioning that was obtained with the right side positioned adjacent to the IR?
  17. The heart shadow demonstrates increased magnification over a left lateral projection.
  18. The left lung demonstrates the sharpest recorded details.
  19. The left hemidiaphragm is demonstrated inferior to the right hemidiaphragm.
  20. 1.5 inches (4 cm) of space separates the posterior and anterior ribs. - 1 and 3 A left lateral chest projection with poor positioning demonstrates the humeri soft tissue superimposed over the anterior lung apices. How was the patient positioned for such an image to be obtained? - The humeri were positioned at a 90-degree angle with the body.

A left lateral chest projection demonstrates the gastric air bubble directly beneath the superior hemidiaphragm. Identify the superior lung. - left A rotated left lateral chest projection demonstrates the heart shadow posterior to the sternum. Identify the anteriorly positioned lung. - right For an AP chest projection obtained with a mobile x-ray unit,

  1. the IR is positioned parallel with the midcoronal plane.
  2. the image is obtained without the use of a grid.
  3. the manubrium is superimposed over the fourth thoracic vertebra.
  4. 10 or 11 posterior ribs are demonstrated above the diaphragm. - 1,2, and 3 A mobile AP chest projection obtained with the central ray angled caudally demonstrates
  5. vertically contoured ribs.
  6. the manubrium projected superior to the fourth thoracic vertebra.
  7. less than 1 inch (2.5 cm) of the apices above the clavicles.
  8. vertical clavicles. - 1 and 4 For an AP-PA chest projection (right lateral position), the
  9. shoulders and the posterior ribs are positioned perpendicular to the cart.
  10. humeri are positioned at a 90-degree angle with the IR.
  11. midcoronal plane is aligned perpendicular to the IR.
  12. patient is elevated on a radiolucent sponge or cardiac board. - 1 and 4 only An AP-PA chest projection (lateral decubitus position) with accurate positioning demonstrates - 2 and 4 A PA chest projection (lateral decubitus position) demonstrates - 2,3, and 4 For a PA oblique chest projection,
  13. the patient is rotated until the midsagittal plane is aligned 45 degrees with the IR.
  14. there is twice as much lung field demonstrated on one side of the vertebral column as on the opposite side.
  15. 10 or 11 posterior ribs are demonstrated above the hemidiaphragm.
  16. the apices, costophrenic angles, and lateral chest walls are included on the image. - 2,3, and 4 A left PA 60-degree oblique chest projection (LAO position)
  1. position the shoulders and the ASISs at equal distances from the IR.
  2. obtain the exposure on expiration.
  3. position the patient's right side adjacent to the imaging table or cart. - 1,2, and 3 For an AP neonatal or infant chest projection, the
  4. central ray is centered to the midsagittal plane at the level of the mammary line.
  5. longitudinal collimation should be open enough to include the upper airway.
  6. head faces straight up, without rotation.
  7. central ray is angled 5 degrees caudally. - 1,2,3, and 4 An AP neonatal chest projection with accurate positioning demonstrates
  8. the right and left side inferior posterior ribs at equal lengths.
  9. upwardly projecting anterior ribs.
  10. at least nine posterior ribs above the diaphragm.
  11. the chin superior to the airway. - 1 and 4 A PA chest projection on a patient with a right side pneumothorax will demonstrate - air in the right pleural cavity. To position the scapulae outside the lung field for a PA chest projection, the patient's - elbows and shoulders are rotated anteriorly A PA chest projection obtained in full lung expansion - demonstrates 10 to 11 posterior ribs above the diaphragm. A lateral chest projection demonstrates the posterior ribs separated by 2.5 inches (6.35 cm). The superior heart shadow does not extend into the anteriorly situated lung. How should the patient be repositioned to obtain an optimal image? - Rotate the right side of the chest 1 inch (2.5 cm) posteriorly An AP chest projection (lateral decubitus position) obtained with the right side positioned against the imaging table will best demonstrate which of the following conditions? - Right pleural effusion A neonate AP chest projection demonstrates the left posterior ribs with greater length than the right posterior ribs. How should the positioning setup be changed to obtain an optimal projection? - Angle the central ray toward the patient's right side. A neonate lateral chest projection taken without full inspiration - demonstrates the hemidiaphragms situated high in the thorax with an exaggerated cephalic curvature. Optimal contrast, density, and penetration have been achieved on AP abdominal projections when which anatomic structures are demonstrated? -

Psoas major muscle, kidneys, inferior ribs, and lumbar transverse processes To best demonstrate intraperitoneal air, - allow the patient to be positioned upright for 5 to 20 minutes prior to obtaining the exposure for an upright AP abdomen projection. An AP abdomen projection demonstrates greater distances from the left lumbar vertebral pedicle to the spinous process than the right pedicles to the spinous process. The projection - was taken with the patient in a LPO position. An AP neonate abdomen projection that was obtained with the patient in a slight RPO position will demonstrate - a wider right iliac wing. Extremity images are displayed so that the anterior or lateral surfaces are facing the viewer. - false A hypersthenic patient's thorax is wider than that of an asthenic patient. - true Energy that is trapped in the computed radiography (CR) imaging plate when images are taken reflects the subject contrast of the imaged body part. - true During digitization, pixels receiving the greatest radiation exposure are assigned values that represent more brightness. - false In DR imaging, the thin-film transistor (TFT) receives the remnant radiation and converts it to light signals of varying intensity. - false The DAP is a measure of the exposure after going through the patient. - false Exposures should not be repeated in digital radiography because of overexposure, brightness, or contrast concerns. - true State whether the following statements relating to digital radiography artifacts are true or false. Phantom images occur when the imaging plate (IP) is not adequately erased before using. - true State whether the following statements relating to digital radiography artifacts are true or false. Natural background radiation can cause fog to appear on the image. - true