A method to reduce systematic spatial shift associated with magnetic resonance imaging.
To reduce the chemical shifts during magnetic resonance (MR) imaging, the authors replaced the petroleum gel in the Brown-Roberts-Well (BRW) MR localizer with chromium chloride. Computed tomography and MR scans were obtained of a phantom skull containing objects with known spatial coordinates. A 2-to 3-mm systematic spatial shift in the frequency-encoded direction was observed with petroleum gel, but not with CrCl3. Results were verified by reconstructing the three-dimensional spatial location of each object using X-Knife computer software. The authors conclude that spatial localization is more accurate with a CrCl3-filled than a petroleum-filled BRW-MR localizer.
Taha
J M
JM
Department of Neurosurgery, University of Cincinnati Medical Center, Ohio, USA.
Lamba
M A
MA
Samaratunga
C
C
Breneman
J C
JC
Warnick
R E
RE
D002712:Chlorides; D017608:Chromium Compounds; D005782:Gels; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D010578:Petroleum; D019047:Phantoms, Imaging; D012886:Skull / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D013238:Stereotaxic Techniques; D014057:Tomography, X-Ray Computed
D002712:Chlorides; D017608:Chromium Compounds; D005782:Gels; D010578:Petroleum; C017133:chromous chloride