|
Timing
Parameters
|
Series
4
|
|
|
Coronal
T2 FSE-XL FS
|
|
TR/TE
|
4000/72
|
|
ETL
|
8
|
|
Flip
Angle
|
—
|
|
RBW
|
21
kHz
|
|
FOV
|
16
cm
|
|
Matrix
|
512
x 192
|
|
Slice
Thickness
|
4mm
|
|
Interslice
Gap
|
1mm
|
|
NEX
|
2
|
|
Acquisition
Time
|
3:12
|
|
Fat
Sat
|
yes
|
|
No
Phase Wrap
|
yes
|
|
EDR
|
no
|
|
Freq
|
S/I
|
|
The coronal
T2-weighted images (Fig. 8.4) are prescribed to
match the coronal T1-weighted images. These images
are useful for detection of marrow edema, injuries
to the collateral ligaments, and cartilage defects.
|
|
Figure
8.4 (click on image to see enlarged view)
Coronal T2-weighted image showing fluid at the
lateral aspect of the joint (arrow). |
Fat suppression
is used to improve visualization of fluid signal.
Extending the bandwidth to 20-22 kHz allows 512
matrix imaging without an increase in the scan time.
Note that the echo time may be reduced to 40-60
msec to improve the SNR of these images.
|
