CTMR 455: Unit 4:1: procedures of the
thorax questions well answered
passed
Indications of a MR chest/ Thorax (7):
-Visualization of lymph nodes, great vessels, trachea, and thymus.
-Detection of mediastinal lymphadenopathy.
-Bronchial tumors
-Vascular evaluation
-Chest wall infections
-Pleural disease
-Rib lesions/Mets
MR is an alternative to CT when the patient is hypersensitive to ________
contrast
Considerations of MR chest/thorax:
-The chest has a relatively poor ___ (Proton density of the lung fields is ___)
-There is little ___ to give good contrast.
(The implementation of a ______ _____ coil helps maintain SNR, Especially useful when thinner
slices and a finer matrix are required)
-Because the chest has poor proton density, _______ slices (7-10mm) should be used to
improve signal-to-noise (Coverage)
, -SNR; low
-fat; volume array
-thicker
Chest imaging can be performed with a number of RF coil designs. Although the ____ coil is
notorious for lower SNR, it can be utilized for large areas of coverage
-This coil is acceptable in cases where ________ _______ is the main determining factor in
image contrast, such as MRA of the aorta or the pulmonary arteries.
-For the most part this coil will produce optimum images for chest imaging. For higher SNR,
higher resolution _______ _____ coils should be used
-body
-injected contrast
-surface array
What allows for image acquisition in between breath holds, used for cardiac/thorax imaging in
MR?
respiratory compensation bellows and respiratory triggering
Phase Direction:
-The phase encoding direction is generally prescribed by the system (For the most part, the
phase direction defaults along the _____ axis of the anatomy)
-__________ to __________ on axial images and _____ to ____ on coronals.
-Swapping the phase axis to R to L on the axial scans and S to I on coronals is occasionally
beneficial to remove _________ from the area of interest.
-short
thorax questions well answered
passed
Indications of a MR chest/ Thorax (7):
-Visualization of lymph nodes, great vessels, trachea, and thymus.
-Detection of mediastinal lymphadenopathy.
-Bronchial tumors
-Vascular evaluation
-Chest wall infections
-Pleural disease
-Rib lesions/Mets
MR is an alternative to CT when the patient is hypersensitive to ________
contrast
Considerations of MR chest/thorax:
-The chest has a relatively poor ___ (Proton density of the lung fields is ___)
-There is little ___ to give good contrast.
(The implementation of a ______ _____ coil helps maintain SNR, Especially useful when thinner
slices and a finer matrix are required)
-Because the chest has poor proton density, _______ slices (7-10mm) should be used to
improve signal-to-noise (Coverage)
, -SNR; low
-fat; volume array
-thicker
Chest imaging can be performed with a number of RF coil designs. Although the ____ coil is
notorious for lower SNR, it can be utilized for large areas of coverage
-This coil is acceptable in cases where ________ _______ is the main determining factor in
image contrast, such as MRA of the aorta or the pulmonary arteries.
-For the most part this coil will produce optimum images for chest imaging. For higher SNR,
higher resolution _______ _____ coils should be used
-body
-injected contrast
-surface array
What allows for image acquisition in between breath holds, used for cardiac/thorax imaging in
MR?
respiratory compensation bellows and respiratory triggering
Phase Direction:
-The phase encoding direction is generally prescribed by the system (For the most part, the
phase direction defaults along the _____ axis of the anatomy)
-__________ to __________ on axial images and _____ to ____ on coronals.
-Swapping the phase axis to R to L on the axial scans and S to I on coronals is occasionally
beneficial to remove _________ from the area of interest.
-short
