Questions With Complete Solutions
Describe how to take a lateral oblique axial view Correct
Answers - foot at *45 deg*
-demonstrates the post facet of the calc
-demonstrates the ant facet of the calc
- central ray directed vert to a point 1 inch ant to the lat malleoli
Describe how to take a lateral oblique view? Correct Answers -
foot at *30 deg*
- post joint in profile
- foot held in *maximally DF and everted* position with a sling
- central ray 1 inch distal to the medial malleoli at an angle of 10
deg cephalic from vertical
Describe how to take a medial oblique axial view? Correct
Answers - foot at *30 deg*
- maximally DF and invert the foot
- middle facet
- central ray directed at 1 inch distal and 1 inch ant to the lateral
malleolus at an *angle of 10 deg cephalic from verticle*
How do MRIs work? Correct Answers Hydrogen nuclei in the
body become capable of producing radiofreq signals.
How is a ankle AP taken? Correct Answers - Beam // to floor
- foot straight ahead
- central beam btwn malleoli
- good visualization of the tibial plafond and medial space btwn
the medial mal and the body of the talus
, - not good visualization of the lateral mall and talus
How is a ankle mdial oblique taken? Correct Answers leg
internally rotated 45 deg
- good view for tibfib syndesmosis
How is a ankle- lateral oblique taken? Correct Answers leg
externally rotated 45 deg.
How is a axial calc X-ray taken? Correct Answers - angle unit
at 45 deg
- central ray aimed at post aspect of calc
- examines the calc for fx, abnrmalities in shape, or internal
fixation in major tarsal fusions
How is a Harris-Beath X-ray taken? Correct Answers - angle
unit at 45 deg
- patient stands on film
- knees bent and ankle flexed 15-20 deg
- first take a scout lateral film and determine the declination
angle of post facet of STJ
- Then take 3 views: one at the angle determined by the lateral
film, one 10 deg above and one 10 deg below
- some advocate 3 arbitrary views at 35 deg, 40 deg, and 45 deg
How is a plantar axial taken? Correct Answers - 1st met head
angles at 90 deg to the vertical
- Beam aimed at the plantar aspect of the sesamoids
- toes DF against film and then raise heel