Spine Flashcards
most spine imaging is performed with the use of
a surface/local coil
in patients who have undergone sugery for a herniated disk in the lumbar spine, contrast enhancment can be sued to distinguish recurrent disk from postoperative scar because
disk enhances more slowly than postoperative scar
for optimal imaging of the C spine patient positioning and local coil placment are
supine/under the neck to include C1-C7
on a 24cm FOV siagittal T spine image that demonstrates a cord compression the vertebral level can be determined by using
a large FOV localizer and counting down from C2
in lumbar spine imaging images acquired directly through intervertebral disk spaces can be acquired in the (plane)
oblique
on T1 weighted images of the spine the CSF appears
hypointense to the spinal cord
the conus and the cauda equina in adult patients are best demonstrated by any of the following
sagittal T spine
Sagittal L spine
coronal T spine
figure B 10 was acquiredin the _____plane
sagittal
figure B 10 is an example of a _____(weighting)
T1
figure B 10 arrow A
oropharynx
figure B 10 arrow B
anterior arch of C1
figure B 10 arrow C
Dens
figure B 10 arrow D
cervical disk
figure B 10 arrow E
trachea
figure B 10 arrow F
spinal cord
figure B 10 arrow G
vertebral body
figure B 10 the vertebral bodies of the C spine can be visualized because
hydrogen in cortical bone is too tightly bound to be “excited” by the MR process therefore cortical bone appears dark on MR images and outlines the vertebral body
bone marrow contains fat and water and therefore appears bright depending upon the scan parameters used to create the image
figure B 10 there is a slight cervical disk herniation at the level of
C5/C6
3D gradient coils on axial views can be used in C spine imaging to provide
thin contiguios sections of the spine
ability to reformat into any other imaging plane
ability to get either T1, spin density or T2* informatoin by changing the aquisition parameters (TR, TE, flip angle)
in complete spine imaging to rule out metastatic lesions of the spinal cord, contrast enhancement can be sued with T 1 weighted images because
metastatic lesions within the cord enhance and normal cord does not
figure B 11 was acquired with a 48cm rectangular FOV, 4 mm slice thickness, and a 512x512 matrix. A small FOV image that would bear the same spatial resolution is
24 cm FOV, 4 mm slice thickness and 256x256 matrix
judging from the SNR on figure B 11 the coil or coils that were most likely used to acquire this image are
phased array
figure B 11 the low signal intensity area (arrows H) that runs superior and inferior but posterior to the spinous process represents
spinatus tendon
figure B 11 was acquired in the ______plane
sagittal
figure B 11 is an example of _______weighting
T 2
figure B 11 arrow A
Pons
figure B 11 arrow B
cervical spinal cord
figure B 11 arrow C
T 3
figure B 11 arrow D
interbertebral disk
figure B 11 arrow E
conus medularis
figure B 11 arrow F
cauda equina
figure B 11 arrow G
sacrum
figure B 12 was acquired in the ________plane
sagittal
figure B 12 is an example of (weighting)
T 1
figure B 12 could have been acquired with a SE or FSE with
short TR and short TE
figure B 12 arrow A
conus medularis
figure B 12 arrow B
ligamentum flavum
figure B 12 arrow C
spinous process
figure B 12 arrow D
anterior longitudinal ligament
figure B 12 arrow E
cauda equina
figure B 12 arrow F
L3/L4 intervertebral disk
figure B 12 arrow G
epidural fat
figure B 12 arrow H
posterior longitudinal ligament
figure B 12 arrow I
L5 vertebral body
figure B 12 arrow J
L5/S1
to evaluate the intervertebral disk in the L spine imaging (figure B 13) is generally performed in the _______plane
off axis oblique plane
figure B 13 is an example of a (weighting)
T 2
figure B 13 wouild have bneen acquired with a SE or FSE with
long TR and long TE
figure B 13 arrow A
right common iliac artery
figure B 13 arrow B
right psoas muscle
figure B 13 arrow C
intervertebral disk
figure B 13 arrow D
pedicle
figure B 13 arrow E
spinal canal (with nerve roots)
figure B 13 arrow F
facet joint
zygapophyseal joint
figure B 13 arrow G
lamina
figure B 13 arrow H
spinous process
figure B 13 arrow I
right erector spinae muscle
