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Author Question: Pathologies associated with air or free air are classified as: compensating terminal additive ... (Read 11 times)

newyorker26

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on: Jul 17, 2018
Pathologies associated with air or free air are classified as:
 
 compensating
  terminal
  additive
  destructive

Question 2

Where is the central ray directed for AP obliques of the SI joints?
 
 at the level of the ASIS
  1 inch medial from the upside ASIS
  1 inch superior and 1 inch medial from the iliac crest
  1 inch medial from the downside ASIS


jordangronback

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Reply #1 on: Jul 17, 2018
Answer to Question 1

destructive

Rationale: Destructive pathologies allow photons to easily penetrate the tissue and result in increased density. Examples of destructive pathologies would be: pneumoperitoneum, osteoporosis, ileus, pneumothorax.

Answer to Question 2

1 inch medial from the upside ASIS

Rationale: AP oblique projections will require the patient to be placed into the RPO and LPO position. The SI joint furthest from the image receptor will open up on posterior oblique positions; therefore the CR should be directed 1 inch medial to the upside ASIS.


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