MIT 327 QUIZ

Radiologist technologists have not responsibility to control the radiation dose to all patients under their care.

• True

• False

As collimation Increase (use)...

• decrease the radiation dosage

• Improve the contrast

• Reducing scattered radiation

• All of the above are correct

The collimation border not only demonstrates good collimation

practices but also can be used to determine :

• kV and low mAs techniques

• Correct filtration

• The Thicker part being imaged

• The exact location of central ray placement.

When AP lumbar vertebrae radiograph is taken.the transverse collimation length reduced to ....cm

• 25cm

• 20cm

• 35cm

• 15cm

How we can sure the all anatomical area included into the image when we using collimator?

• adjacent the patient's skin-line

• use very little collimation because the entire film is needed to demonstrate the required anatomy.

• Use palpable anatomical structures around the area of interest

• collimated border on all four sides of the image

Clipping of required anatomy on this image result from ..

• A.view the shadow of the object collimator light.

• B.over collimation on a structure

• C.Poor centering

• B & C are correct

Proper gonadal shielding practices reduce radiation exposure of the female gonads by about .......percent

• 95%

• 90%

• 55%

• 50%

To properly shield the female gonad place the..

• wider end just superior to the symphysis pubis

• Narrower end of the shield to lay superiorly over the reproductive organs.

• wider end of the shield to lay superiorly over the reproductive organs.

• None of the above are correct

To protect Radiosensitive cells place

a flat contact of

• of vinyl and 1 mm of copper

• of vinyl and 1 mm of lead

• of vinyl and 1 mm of glass

• of vinyl and 1 mm of zinc

When accurately positioned, the male shield frames the inferior outlines of the symphysis pubis and inferior ramus and extends inferiorly until the entire .......... is covered.

• Hip joint

• Pelvis bone

• Ovaries

• Scrotum