To familiarize readers the key imaging features of spectrum of intracranial pathologies causing fluid levels. 2.
To discuss the pertinent features related to the pathology with emphasis on the pathophysiological cause of appearance. 3.
To understand the role of advanced sequences in the diagnosis of intracranial lesions causing fluid levels.
Intracranial pathologies which include extra-axial and intra-axial lesions showing fluid levels are not uncommon and have broad imaging spectra.
The authors have classified them as blood-fluid,
protein-fluid and fat- fluid levels and discussed the common and rare pathologies in each category in a case based approach under the categories of location,
incidence of fluid levels,
imaging characteristics and postulation for fluid level.
Image acquisition near perpendicular to the plane...
Findings and procedure details
Classification of Fluid Levels Although MR signal characteristics are helpful in identifying the contents of the fluid levels,
their formation is actually related to density differences secondary to their composition within the layers.
Fluid levels occur when two or more immiscible substances of unequal density coexist.
The fluid levels that we confronted are classified into four groups ( Fig. 1 ). Blood-fluid levels: Common: Pituitary adenoma,
This pictorial review provides an useful algorithm for accurate pre operative diagnosis This review also provides additional information about the common location of lesions and postulations for resultant fluid levels Also increases the awareness of rare intracranial pathologies causing fluid levels and emphasizes the sequence of choice for a particular type of fluid level It is important to remember that the MR appearance of a specific lesion may vary according to its composition and...
MR imaging of intracranial fluid levels.
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