Scanning Thorax / Breast Flashcards
What are some indications for a chest MRI ?
1) Mediastinal mass
2) Neurogenic lesions
3) Thoracic Aortic Dissection or aneurysm
4) Differentiation between vascular and lymph node irregularities
What position should patients be in for a chest MRI and what coils do we use?
Large surface coil
Supine head 1st with their lungs near the lungs on the bed.
What is your first MRI image in a chest protocol?
Localizers :)
Axial, coronal, and sagittal
At what level should you be at for a chest MRI?
at the level of the mediastinum
What are some indications for doing an Aorta MRI?
vascular occlusion, claudication, stenosis, aneurysm, dissection, Arteriovenous malformation.
When scanning an aorta, should you use a large or small field of view ? (FOV)
large
Will we use contrast scanning an aorta?
yes
When scanning a sagital aorta, use the axial image and go oblique over the axial view of aorta.
True
What are some indications for doing a heart MRI?
malignancy, benign mass, thrombus, mets from lung or other parts, infarction, pericarditis, or coronary diease.
Name a few cardiac malignancies
Angiosarcoma, sarcoma, malignant paraganglioma, rhabdomyosarcoma (pediatric)
Name a few benign cardiac masses
Fibroma, myxoma, lipoma, rhabdomyoma (pediatric)
What are the four views we have to get when imaging the heart?
2 chamber 4 chamber short axis LVOT (left ventricular outflow tract) RVOT (right ventricular outflow tract)
Which view of the heart is best for evaluating abnormal wall motion?
2 chamber 4 chamber short axis LVOT (left ventricular outflow tract) RVOT (right ventricular outflow tract)
2 Chamber view
Where should we align our box when getting a 2-chamber view?
Through the apex of the heart to the midpoint of the mitral valve
(use an axial localizer or 4ch view)
Which view would best show the calculation of ventricular volumes/mass, and ejection fraction?
2 chamber 4 chamber short axis LVOT (left ventricular outflow tract) RVOT (right ventricular outflow tract)
short axis
When are the chambers of the heart fully relaxed and largest??
Systole or diastole?
end of diastole
To get the short axis view, you need to choose a 2 chamber view at the end of diastole and position the slice across the mitral valve annulus.
True or False
True
When getting a 4chamber view, you must use which of the following views?
2 chamber 4 chamber short axis LVOT (left ventricular outflow tract) RVOT (right ventricular outflow tract)
Short axis
You align it to pass through the midpoint of the left ventricle and apex of the heart
The left ventricular outflow tract is often called the “three chamber view”
True or False
True
Use the short axis image at the base of the left ventricle when trying to get the LVOT view.
True
True
When imaging the RVOT (right ventricular outflow tract), you use a true axial localizer. Where would we align it to?
through the pulmonary trunk at the bifurication of the right and left pulmonary arteries.
You want to put your slice throught the main pulmonary artery.
What are some indications for doing a breast MR?
Known breast cancer
Ruptured implants
Screening for high risk patients or disease in the contralateral breast prior to surgery
Breast density is an issue in MRI.
True or False
FALSE!
If you are doing a breast MRI on a male, what is the best position to put them in
Prone or Supine?
prone
Why is prone the best position for an breast MRI?
It helps deflect any respiratory motion.
At what point in a women’s cycle should you do a breast MRI?
mid cycle, around week two (days 7-14)
We do not need contrast on breast MRI
True or False
False.
we shall start an IV in the antecubital vein. Timing of contrast is essential.
Before positioning the patient in the scanner for a breast MRI, what is the first thing we should do?
put markers on the nipples and any scars or biopsy sites
Which view is most important for evaluating fatty structures in the breast ?
3-dimensional vibrant (T1 FSPGR)
It is a NON-fat sat which makes sense bc if were looking for fatty tissues we do not want to drain the fat tissue out.
