- Limited ability in imaging the skull and facial bones -- conventional X-ray or CT scan is better in demonstrating bone details.
- Compared to CT scanning, MRI is less sensitive in demonstrating acute hemorrhage, as in subarachnoid hemorrhage and hemorrhagic infarction.
- Hard to depict calcifications
- MRI does not always distinguish tumor tissue from edema fluid
- Less sensitive in detecting small abnormalities compared to CT scans (poor spatial resolution)
- Inability to scan critically-ill patients requiring life support systems and monitoring devices that employ ferromagnetic materials.
- May be dangerous in scanning patients with metal implants and other metal objects
- May provoke claustrophobia
- Longer exam time compared to CT scans
- Safety in scanning pregnant women is not known.
Popular Posts
-
Normal MRI Anatomy The pectoralis tendon is best seen on axial T1 and T2-weighted images as a curvilinear low-signal band inserting o...
-
High Resolution Brainstem Imaging CISS (Constructive Interference Steady State) CISS is a strongly T2 weighted GRE sequence. In essen...
-
SAGITAL ORBIT MRI PLANNING REFERRAL LINES AXIAL ORBIT MRI PLANNING REFERRAL LINES CORONAL ORBIT MRI PLANNING REFERRAL ... -
MP-RAGE stands for Magnetisation Prepared RApid Gradient Echo. MP-RAGE is a 3DFT contrast prepared gradient echo sequence. The T1 weig...
-
Axial Plane: Prescribe plane perpendicular to midshaft of the proximal phalanx of the thumb. Scan from 1st carp-metacarpal joint th...
-
Magnetic field risk: The static magnetic field of the MRI system is exceptionally strong, A 1.5 T magnet generates a magnetic that is ...
-
Prescribing sagittal images. Images are obtained no more than 10° oblique to a perpendicular to a line connecting the ... -
An advanced MRI mapping from the Sperling Prostate Center can help inform all three surgical approaches to prostate cancer treatment: op...
No comments:
Post a Comment