Evaluate Thorax And Abdomen Images - ARRT Radiography Exam

1. What is the key evaluation criterion for a left lateral decubitus abdomen for free air detection?

   Include diaphragm; free air seen along right lateral abdomen. Diaphragm inclusion in left decubitus allows free air to rise along the right lateral border for identification of intraperitoneal gas.

2. Which finding indicates motion on a chest or abdomen radiograph during image evaluation?

   Blurring of bony margins and soft tissue interfaces. Motion artifacts manifest as blurred edges due to patient movement during exposure, compromising image sharpness and diagnostic quality.

3. What anatomy must be included on a lateral chest radiograph for adequate coverage?

   Apices through posterior costophrenic angles. Coverage from apices to posterior costophrenic angles ensures complete demonstration of lateral lung anatomy and potential abnormalities.

4. What is the correct side marker requirement for an abdomen decubitus image with a horizontal beam?

   Marker indicates the side down (dependent side). Marking the dependent side ensures accurate identification of patient orientation and pathology localization in decubitus projections.

5. Which finding indicates the arms were not elevated enough on a lateral chest radiograph?

   Humeri/soft tissue superimpose the upper lung fields. Inadequate arm elevation allows humeral and soft tissue overlap, obscuring apical lung regions in lateral projection.

6. What anatomical landmarks must be included on a PA chest radiograph for adequate coverage?

   Lung apices through costophrenic angles (entire lungs). Ensures comprehensive visualization of pulmonary structures from superior to inferior aspects for accurate pathology detection.

7. What anatomy must be demonstrated on a dorsal decubitus chest image taken for pleural effusion evaluation?

   Entire lungs with a horizontal beam; fluid layers posteriorly. Horizontal beam in dorsal decubitus demonstrates entire lungs with fluid layering posteriorly to confirm pleural effusion presence.

8. Identify the rotation error if the right SC joint is farther from the spine than the left on a PA chest.

   Patient is rotated toward the left side. Asymmetric positioning causes the farther sternoclavicular joint to indicate the direction of anterior rotation in PA projection.

9. Which finding indicates the abdomen radiograph was taken after the patient inhaled rather than exhaled?

   Diaphragm is lower; abdominal organs appear displaced inferiorly. Inspiration lowers the diaphragm and displaces organs inferiorly, altering expected anatomy compared to standard expiratory positioning.

10. What is the primary positioning indicator of rotation on a PA chest radiograph?

    Sternoclavicular joints are equidistant from the vertebral column. Symmetry of sternoclavicular joints relative to the spine confirms midline alignment and absence of rotational distortion.

11. Which exposure-related appearance is expected on an adequately penetrated PA chest radiograph?

    Thoracic spine faintly visible through the heart shadow. Faint visibility of the thoracic spine through the cardiac silhouette confirms appropriate kilovoltage for penetrating dense mediastinal structures.

12. What positioning adjustment is used to remove scapulae from the lung fields on a PA chest?

    Roll shoulders forward (protract scapulae). Protracting the scapulae laterally displaces them from superimposing on the lung fields, improving visibility of pulmonary anatomy.

13. What positioning indicator confirms a true lateral chest radiograph (no rotation)?

    Posterior ribs are nearly superimposed. Near superimposition of posterior ribs indicates perpendicular alignment of the median sagittal plane to the image receptor, minimizing rotation.

14. What is the key evaluation criterion for an erect abdomen to demonstrate free intraperitoneal air?

    Include diaphragms with a horizontal beam; air under diaphragm. Erect positioning with horizontal beam and diaphragm inclusion allows free air to rise subdiaphragmatically for detection of perforation.

15. What is the key evaluation criterion for a cross-table lateral abdomen (Dorsal decubitus lateral)?

    Horizontal beam; air-fluid levels in anterior abdomen. Horizontal beam in dorsal decubitus lateral projection visualizes air-fluid levels anteriorly for assessment of abdominal pathologies.

16. Which image finding indicates underinspiration on a PA chest radiograph?

    Fewer than 10 posterior ribs above the diaphragm. Insufficient rib count above the diaphragm reflects inadequate lung inflation, potentially obscuring basal pathologies.

17. What is the key evaluation criterion for a lateral decubitus chest image intended to show pleural effusion?

    Affected side down with a horizontal beam; fluid layers out. Positioning the affected side dependent with horizontal beam allows fluid to layer along the lateral chest wall for clear visualization.

18. Which side marker must appear on a lateral chest radiograph to identify the standard projection?

    Left marker (standard is left lateral). Standard left lateral projection requires a left marker to denote the side closest to the image receptor for accurate orientation.

19. What is the minimum inspiration criterion commonly used to judge an adequate PA chest radiograph?

    At least 10 posterior ribs visible above the diaphragm. Visibility of at least 10 posterior ribs ensures sufficient diaphragmatic descent for optimal lung expansion assessment.

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