Week 10: Chest Flashcards
What are the four studies that can be performed in the chest?
- MRI brachial plexus.
- MRI cardiac.
- MRA chest.
- MRI breast.
Of the four studies, which is the only one where the patient is inserted into the bore prone, headfirst?
MRI breasts
Other than MRI breasts, how should the patient be positioned in the bore for the other studies of the chest?
Supine, headfirst
Similar to most MRI studies, the body of the patient should be positioned with the midsagittal line perpendicular to the alignment light. This is true for all studies of the chest. True or false?
False; MRI brachial plexus has the body offset, with the affected side perpendicular to the alignment light.
Given that MRI breasts are performed with the patient prone, what landmark should be used instead of mid sternum?
T5 thoracic vertebrae
All studies of the chest use the mid sternum landmark, except for ___________, which is slightly superior at the sternal notch.
MRI brachial plexus
What coil is used for MRI brachial plexus, MRI cardiac, and MRA chest?
8 channel cardiac phase array coil
What coil is used during MRI breast exams?
Breast coil
Which chest studies use contrast?
- MRA chest.
- MRI breast.
What is the order of procedures when using IV contrast?
- Patient receives IV line with confirmed flow, check for air.
- Collect Pre-contrast images.
- Begin power injector and collect CINE images simultaneously
- Start Post-contrast scan once the contrast is detected on CINE images
MRI Cardiac studies utilize gating to acquire images during moments of stillness. Gating uses ______ and ________ to monitor movement during the scan.
- EKG leads
- Respiratory Bellows
In regard to EKG monitoring or gating during MRI cardiac, when is image acquisition performed
Between the R-R interval (distole)
What sequence options are utilized during MRI brachial plexus?
- Flow compensation on.
- No phase wrap on.
- Saturation pulses, perpendicular to phase direction.
What sequence options are utilized during an MRI cardiac?
- Respiratory monitors.
- Dating.
- Trigger parameters.
What sequence option is utilized during MRI breasts?
Saturation bands
Where are saturation bands placed during MRI breasts? Why?
Laterally of the chest wall, posterior to the breasts. To ensure that any motion behind the breasts (breathing, pectoral muscles, back muscles, etc.) Doesn’t interfere with the imaging of the breast tissue.
Which study of the chest utilizes saturation bands, posterior and anterior to the given volume slab?
MRA chest
What are the five protocols of an MRI brachial plexus?
- Axial*
- Coronal oblique IR.
- Coronal oblique*
- Sagittal*
- ABER view*
3 of the protocols for MRI brachial plexus are left vague (*). What determines how the protocols are weighted? (T1, PD, T2, etc…)
The facility protocol
MRI brachial plexus axial protocol views the brachial plexus in cross-sectional, covering from ______ to ________.
- C3-C4
- Just below axilla
“Viewing on the short axis” and “viewing in cross section” are synonymous. True or false?
True
What is the approximate sliced thickness of the coronal oblique protocols of the MRI brachial plexus?
~2mm
How far must the coronal plane be obliqued for the coronal oblique protocols of the MRI brachial plexus?
The coronal plane must be obliqued until it follows/lines up with the long axis of the brachial plexus
The coronal oblique protocols of MRI brachial plexus follows the long axis of the brachial plexus. What does the IR protocol evaluate?
Interruptions along the nerve tract; tumors, fluid, masses, etc.
The sagittal protocol of MRI brachial plexus shows cross-sectional views of the nerves entering and exiting the __________.
Thoracic outlet
The ABER protocol of MRI brachial plexus is very similar to that of the sagittal. What is different about the patient position?
Patients arms above their head
What effect does the patient positioning have on the anatomy during the ABER protocol of MRI brachial plexus?
Putting the patient’s arms above their head compresses the thoracic outlet, thus showing the effect it has on the brachial plexus nerves.
What is the thoracic outlet? What two important anatomical structures are found within within it?
- The space between the clavicle and the first rib.
- The brachial plexus and the subclavian vein.
What is the brachial plexus and where does it originate?
- A network of nerves.
- Originates at the level of C5-T1
The brachial plexus runs perpendicular to the right and left subclavian artery and vein. True or false?
False; parallel