Exposures Quiz 3: Study Online at

 

exposures quiz 3 Study online at quizlet.com/_1h7co

1.

as magnification increases what does resolution do

decrease

2.

as OID increase increases s what does magnification do?

increases

3.

as SID increases what does magnification do?

decreases

4.

determination of the cause of the problem?

Technical factor factorssphotographic- contrast density  geometric- detail distortion Procedural Procedu ral factors patient postion patient prep-are they cleaned out equipment malfunction phototiming phototim ing not calibrated tube misfired  wrong buckey  processing time in machine CR reader - weird artifacts

14.  what

is proper alignment alignme nt and why is i t so critical?

-when the CR is per perpend pendicular icular to the part and image receptor -part parallel to image i mage recept receptor or = cr is the only perpe perpendicular ndicular portion port ion of the beam so if the CR is not centered centered the image w will ill be formed forme d by an angled gled photons resulting in shape distortion

15.  What

unequal magnification of the shape of the object being imaged

16.  What

application of scientific knowledge to the analysis of an image-making a decision about the quality of an image

17.  what

-within acceptance limits- dont rep repeat eat if passes this -optimal -optim al or n not ot opt optimalimal- h elps in future -outside acceptance limits

18.  what

1)classification of the image 2) determ determination ination of the cause of  the problem 3) recommendation of corrective action

is shape sha pe distortion

is the art of image critique?

is the classification of the image?

is the order order of the image critique method?

exposure chemicals 5.

t or f object size is always larger large r than image size

false

6.

T or F there will always be magnification

true

19.  what

improper alignment of the tube and IR(film)

 what are on on the spot decision of quality?

position tech factors pathology  film screen processing

20.  what

part being improperly improperly alig ned

21.  when

magnification. bc of the divergence of the beam

7.

is the reason reason for elongation? is the reason reason for foreshortening? dealing de aling with tthe he creation of xrays and distortion d o we see magnification or minification? and why 

8.

 What are the 2 types o of  f  distortion?

size and shape

9.

 what are the recommendation recomm endation for corrective action?

appropriate action for each appropriate cause or problem we identify 

22.  When

mammography 

elongation and foreshortening

23.  who

the radiographer! they need to diagnos e the pr problem oblem and know  how to fix it.. are relied on by the radiologist

10.  What

are the two ttypes ypes of  shape distortion?

11.  What

is distortion? di stortion?

misrepresentation of siz e or misrepresentation shape of object being examined - distortion may be present but not visible bc of  density/contrast

12.  What

is elongation elongation

 when objects appear longer than they actually are

is foreshortening? foreshortening?

 when objects appear shorter

13.  what

than they actually are

do we use magnification to our advantage? is the expert in image analysis?