Week 10: Pelvis Flashcards
What is the patient positioning for all pelvic MRI exams?
Supine, feet first
All pelvic exams in MRI require the patient’s mid-sagittal line to be perpendicular to the alignment light. True or false?
True
What landmark is used for both male and female MRI pelvis?
1” above the pubic symphysis
The landmark used for MRI hamstring depends on the exam’s focus. What landmark is used for a proximal hamstring? Distal?
- Pubic symphysis
- Mid-thigh
What coil can be used for all exams of the pelvis?
8 channel cardiac coil
MRI Male Pelvis can sometimes use a linear shaped coil inserted into the rectum to provide increase signal near the prostate. What is this coil called?
Endo-rectal coil
Which of the 3 pelvic exams does NOT generally utilize IV contrast?
MRI Hamstring
Normal protocol for MRI Hamstring scans bilaterally, covering from above the _______ down to below the ________.
- Ischium
- Knee
What sequence options are utilized during MRI male and female pelvis?
- Flow compensation on
- No phase wrap on
- Saturation bands
What are the protocols for MRI Hamstring?
- 3 plane localizer Haste/SSFSE
- Axial* (T1, T2, PD)
- Coronal* (IR, T2 Fat Sat, Ideal Thin)
- Axial* (IR, T2 Fat Sat, Ideal Thin)
What is the area of coverage for the 3 plane localizer protocol of an MRI hamstring? Is this considered a short or long area of coverage?
- Hip to knee
- Long
What field of view is used for the 3 plane localizer and coronal protocols of MRI hamstring?
48-50cm
The Coronal protocol views the short axis of the hamstring. True or false?
False; long axis
The coronal protocol of MRI, hamstring scans from the _______ aspect of the hamstring to the _________.
- Anterior
- Posterior
The Axial* and Coronal (IR, T2 Fat Sat, Ideal Thin) protocols of MRI hamstring can show tears in the muscle. A tear would have what kind of appearance on these images?
Bright
Where are tears most common in the hamstring?
Near the ischium, the hamstring’s origin
Inversion recovery images are acquired during an MRI hamstring because they are ideal for showing what?
Edema patterns of possible tears
What three muscles make up the hamstring?
- Semitendinosus
- Semimembranosus
- Bicep femoris
The hamstring originates just below the posterior knee and attaches at the ischium. True or false?
False; it originates at the ischium and attaches just below posterior knee
What are three clinical concerns for MRI hamstring?
- Wakeboard injuries.
- Squatting
- Femoral extension injuries.
What are the protocols for MRI Female pelvis?
- 3 plane localizer
- Axial
- Axial T1/T2 LowAbd/Pel
- Coronal Ideal/IR LowAbd/Pel
- Uterus Sagittal T2
- Uterus Coronal-Oblique T2
- Uterus Axial-Oblique T2
- Uterus Axial-Oblique SPGR/Flash/T1 FatSat (pre- and post-contrast)
The Axial* protocol of MRI Female evaluates for what 4 concerns?
- Fibroids
- Endometriosis
- Heavy bleeding between cycles
- Pelvic pain
The first few protocols of MRI Female and Male are of the lower abdomen and pelvis. What is the recommended slice thickness for these?
5mm
The lower abdomen and pelvis protocols of MRI Male and Female recommend a FoV of _________.
32-36cm
For both MRI Male and Female, the Axial T1/T2 LowAbd/Pel protocol covers left trochanter to right trochanter, starting below the pubic symphysis and ending above the kidneys. True or false?
True
Which protocol of MRI female and male evaluates the presence of lymph node malignancies?
Axial T1/T2 LowAbd/Pel
The coronal Ideal/IR of the lower abdomen for male and female covers from the ________ to the _________.
- Sacrum
- Pubic symphysis
The Sagittal, Coronal-oblique, and Axial-oblique protocols of both the uterus and the prostate are all similar in that they have the same slice thickness and field of view. What are they?
- 2.5-3.5mm
- 16-20cm
The Sagittal T1/T2 of the ______ actually covers slightly farther than the _______, covering laterally to the mid-hips as opposed to acetabulums.
- Uterus
- Prostates
Covering rectum to public symphysis, the coronal-oblique protocol of MRI Female is angled until the plane is parallel with the _______.
Uterus
Covering from rectum to pubic synthesis, the coronal-oblique protocol of MRI Male is obliqued:
How much?
In what direction?
And off of which plane?
35° anteriorly off of the sagittal plane
A coronal-oblique protocol of MRI prostate is obliqued in such a way to view the long axis of what anatomical structure?
The urethra
The axial oblique protocol of MRI prostate and uterus is plotted perpendicular to which plane?
Perpendicular to the coronal oblique
The ___________ protocol, of both MRI prostate and uterus, covers from the anus up to above the bladder.
Axial oblique
For either MRI Prostate or Uterus, which protocol is used with contrast?
Axial-Oblique SPGR/Flash/ T1 Fat Sat
Malignancies are normally _________ fed, and show enhancement within the first __________ of injection.
- Arterially
- 30 seconds
