27. Pulse Sequences
Menisci Short TE sequence (<20 msec) ,Proton density / gradient echo
/ (T1) Caution with FSE PD (blurring)
Tendons
Ligaments
Muscle
Fluid
FSE T2 with fat saturation
Inversion recovery (STIR)
Bone
marrow
FSE T2 with fat saturation
Inversion recovery (STIR)
Cartilage Good contrast between
fluid , cartilage and subchondral bone
53. Iliotibial Band Friction Syndrome
The T1-weighted coronal image demonstrates intermediate signal intensity
(arrows) replacing normal fat signal intensity deep to the iliotibial band
(arrowhead).
The STIR coronal image demonstrates ill defined increased signal intensity
(arrows) deep to the iliotibial band (arrowhead). Subtle increased signal
intensity (short arrows) is also present superficial to the iliotibial band.
60. • Right, Axial sonogram of posterior knee shows Baker’s cyst (arrowheads) with fluid (solid
straight arrow) between semimembranosus tendon (curved arrow) and medial
gastrocnemius tendon (open arrow). Note subgastrocnemius component (asterisk) of Baker’s
cyst. Note that top of image is posterior; right side of image is medial. M = medial
gastrocnemius muscle.
• , Axial proton density–weighted MR image with fat saturation reveals Baker’s cyst
(arrowheads ) with fluid (black arrow ) between semimembranosus tendon (curved white
arrow ) and medial gastrocnemius tendon (open arrow ). Note subgastrocnemius component
(asterisk ) of Baker’s cyst. M = medial gastrocnemius muscle.
61. • Right, Axial sonogram shows echogenic intraarticular body
(arrow ) in Baker’s cyst (arrowheads ). Note that top of
image is posterior.
• Left, Sagittal proton density–weighted MR image reveals
intermediate signal intraarticular body (arrow ) in Baker’s
cyst (arrowheads ).
62. • Right, Sagittal sonogram shows hypoechoic
meniscal cyst (curved arrow) in contact with
hyperechoic meniscus (open arrows) and
hypoechoic meniscal tear (solid straight arrows).
F = femur, c = hyaline cartilage.
• Left top, Sagittal proton density–weighted MR
image reveals meniscal cyst (curved arrow ) in
continuity with meniscal tear (straight arrow ).
• Left bottom, Axial proton density–weighted
MR image with fat saturation reveals meniscal
cyst (curved arrow ) with signal intensity of fluid
without extension between semimembranosus
tendon (undulating arrow ) and medial
gastrocnemius tendon (arrowhead ).