CAMRT Knee & Patella Projections + Critique
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
4.18.1 Anteroposterior (AP) lateral
Patella fully EXTEND KNEE
lies just proximal to the femoral
patellar surface and is slightly
MEDIAL OR LATERAL to the knee
midline.
AP knee, to have intercondylar Internally rotate the leg, placing the
eminence entered within the femoral
intercondylar fossa, and tib Si one epicondyles at equidistant and parallel with
1/2 the IR.
of fib head... how should the leg
be
positioned?
AP knee • Angle the CR to align it b. tibial plateau
parallel with the....... • 5 degrees caudal if ASIS to the table
a. lower leg measurement is 18 cm or below
b. tibial plateau • perpendicular beam if ASIS to the table
c. tibia measurement is between 19 and 24 cm
• 5 degrees cephalic if ASIS to the table
measurement is 25 cm and above
THIS ALLOWS A + P DISTAL TIB
MARGINS TO BE
ALIGNED, AND FIB HEAD 1.25CM
DISTAL TO THE
TIBIAL PLATUEA
,AP KNEE: Knee joint (femorotibial) medial epicondyle
is Bontrager says 1.25cm distal to apex of
at the center of the exposure field. patella
by centering... Longitudinally collimate to include 1/4 of
• Center the CR to the midline of the distal
the femur and proximal lower leg.
knee at a level 1 inch (2.5 cm)
distal
to the.....
AP knee: if the leg is not internally medial
rotated enough to put epicondyles tib superimposes more than 1/2 of the
parallel with IR, the medial fibular head
epicondyles is placed closer to the
IR and the projection will show a
larger appearing _______ femoral
condyles
AP KNEE: To visualize the patella DISTALLY
and onto the patellar surface of the femur and
fossa as required, the leg must be then
in laterally into the intercondylar
full extension. As the knee is fossa, duplicating a C-shaped path that is
flexed, open
the patella shifts PROXIMALLY laterally
OR
DISTALLY and medially
, Generally, when the knee is flexed a. intercondylar
20 90 the patella is within the intercondylar
degrees, the patella is fossa
demonstrated
on the patellar surface. With 30 to
70
degrees of knee flexion, the
patella
is demonstrated between the
patellar surface and the
___________
fossa.
a. intercondylar
b. patellar
c. posterior
d. inferior
AP KNEE: With patellar laterally
subluxation laterally situated patella, evaluate the
(partial patellar dislocation), the symmetry of
patella may be situated more the femoral condyles and the relationship
laterally OR medially than normal of the
on an AP knee projection tibia and fibular head to rule out external
rotation
before assuming that the patella is
subluxed.
External rotation also
results in a laterally located patella.
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
4.18.1 Anteroposterior (AP) lateral
Patella fully EXTEND KNEE
lies just proximal to the femoral
patellar surface and is slightly
MEDIAL OR LATERAL to the knee
midline.
AP knee, to have intercondylar Internally rotate the leg, placing the
eminence entered within the femoral
intercondylar fossa, and tib Si one epicondyles at equidistant and parallel with
1/2 the IR.
of fib head... how should the leg
be
positioned?
AP knee • Angle the CR to align it b. tibial plateau
parallel with the....... • 5 degrees caudal if ASIS to the table
a. lower leg measurement is 18 cm or below
b. tibial plateau • perpendicular beam if ASIS to the table
c. tibia measurement is between 19 and 24 cm
• 5 degrees cephalic if ASIS to the table
measurement is 25 cm and above
THIS ALLOWS A + P DISTAL TIB
MARGINS TO BE
ALIGNED, AND FIB HEAD 1.25CM
DISTAL TO THE
TIBIAL PLATUEA
,AP KNEE: Knee joint (femorotibial) medial epicondyle
is Bontrager says 1.25cm distal to apex of
at the center of the exposure field. patella
by centering... Longitudinally collimate to include 1/4 of
• Center the CR to the midline of the distal
the femur and proximal lower leg.
knee at a level 1 inch (2.5 cm)
distal
to the.....
AP knee: if the leg is not internally medial
rotated enough to put epicondyles tib superimposes more than 1/2 of the
parallel with IR, the medial fibular head
epicondyles is placed closer to the
IR and the projection will show a
larger appearing _______ femoral
condyles
AP KNEE: To visualize the patella DISTALLY
and onto the patellar surface of the femur and
fossa as required, the leg must be then
in laterally into the intercondylar
full extension. As the knee is fossa, duplicating a C-shaped path that is
flexed, open
the patella shifts PROXIMALLY laterally
OR
DISTALLY and medially
, Generally, when the knee is flexed a. intercondylar
20 90 the patella is within the intercondylar
degrees, the patella is fossa
demonstrated
on the patellar surface. With 30 to
70
degrees of knee flexion, the
patella
is demonstrated between the
patellar surface and the
___________
fossa.
a. intercondylar
b. patellar
c. posterior
d. inferior
AP KNEE: With patellar laterally
subluxation laterally situated patella, evaluate the
(partial patellar dislocation), the symmetry of
patella may be situated more the femoral condyles and the relationship
laterally OR medially than normal of the
on an AP knee projection tibia and fibular head to rule out external
rotation
before assuming that the patella is
subluxed.
External rotation also
results in a laterally located patella.
