Lower Extremity Flashcards
CR for the PA Axial Foot:
10 degrees posterior angulation Cephalic/proximally to the base of the third metatarsal
KNOW FOOT ANATOMY
When performing a medial oblique of the foot, the plantar surface forms a _____ angle to the plane of the IR
30 degree angle
All of the following are best demonstrated on a medial oblique of the foot except:
Base of fifth metatarsal
Cuboid
Third Cuneiform
First cuneiform
First Cuneiform
On a 30 degree oblique of the foot you best demonstrate on a lateral all of the following except:
1st cuneiform
2nd cuneiform
Navicular
Cuboid
Cuboid
Which of the following will best demonstarte the longitudinal arch of the foot?
Lateral weight bearing method
How should you routinely perform the longitudinal arch of the foot?
Lateromedial Projection
Where the foot and the tib fib make a 90 degree angle:
Dorsiflexion
Axial Calcaneous:
30 degree Cephalic angulation to the long axis of the foot at the base of the third metatarsal
The patient is seated on the table their leg is fully extended and their foot is hyper flexed the CR enters with a 40 degree Cephalic Angulation to the long axis of the foot at the base of the third metatarsal:
Axial Calcanious
AP Ankle:
The foot is dorsiflexed
The CR enters halfway between the medial and lateral malioulus
How many degrees do you oblique the part for the mortise oblique of the ankle?
15-20 degree medial oblique to the midline
What is the purpose of performing stress methods of the ankle? Who stressed the joint?
Inversion Eversion for ligament tear
Physician
Which bone is the weight bearing bone?
Tibia
Which bone is the non weight bearing bone of the lower leg?
Fibula
Which bone projects down more distally the Tibia or Fibula?
Fibula
Which bone projects down more distally the Tibia or Fibula?
Fibula
The tibia is _____ in relationship to the fibula
Medial and Anterior
The fibula is ______ in relationship to the Tibia.
Lateral and Posterior
Clinically we have a long bone and want to include both joint spaces what do you do as a technologist?
Increase SID
Turn the Cassette Diagonally
KNOW ANATOMY OF THE KNEE
The Knee CR
1/2 inch below the apex of the patella
Anytime an anatomical part measures 19 cm or less on a pelvis we angle:
3-5 degree caudad angulation
Anytime an anatomical part measures 19 cm-24cm on a pelvis we angle:
Perpendicular
Anytime an anatomical part measures greater than 24 cm we angle the tube for the pelvis:
3-5 degree Cephalic
When we position a lateral knee you flex the anatomical part:
20-30 degrees
When you place a 3-5 degrees Cephalic angulation on the lateral knee the purpose is to:
Superimpose the condyles and epicondyles
BE ABLE TO LOOK FOR ROTATION ON A LATERAL KNEE:
Rotated clean up
If the proximal tib fib relationship start to see the superimposition go away/move further apart: over rotated
If the fibula stays well within the tibia: under rotation
Which of the following will best demonstrate the:
Menisci
Joint spaces
cartilage and it’s joint spaces
Arthritis
Bilateral AP Weight Bearing Knees
When you perform a 45 medial oblique of the knee what is best being demonstrated?
Proximal Tibiofibular Joint Spaces without superimposition
The patient is kneeling on all fours they lean forward 20 degrees, 70 degree angle the CR enters:
Perpendicular to the Tib Fib
If you demonstrate any tunnel view of the knee the CR must always be:
Perpendicular to the Tib Fib/lower leg
The patient is kneeling on all fours, lean forward 20 degrees, to create a 70 degree angle this is called:
Homblad
The largest sesamoid bone in the body:
Patella
Prone flexed at 90 degrees:
Settagast
When a patient presents with a perforation:
Water soluble
A tangential projection of the patella is not to be performed until you rule out what type of fracture of the lateral?
Transverse Fractures
A tangential projection of the patella shows what type of fractures?
Vertical Fractures
