Development and evaluation of phantom for verification of section thickness at thin-section MR imaging.
The purpose of this study was to construct and evaluate a phantom for measurement of magnetic resonance (MR) imaging sections with thicknesses of 0.3-0.6 mm. The phantom consisted of 304 0.1-mm-thick disks, each of which had a single notch filled with a diluted solution of gadopentetate dimeglumine. Qualitative and quantitative evaluations of T1-weighted images with section thicknesses of 0.3-0.6 mm were performed. A computer simulation was performed to evaluate the influence of different examination angles. At quantitative evaluation, the difference between nominal and measured section thicknesses ranged from 11% (nominal section thickness, 0.6 mm) to 18% (nominal section thickness, 0.4 mm). Computer simulations revealed that the phantom's positioning along the z-axis had a negligible influence at quantitative evaluation.
Lemke
Arne-Jörn
AJ
Charité, Universitätsmedizin Berlin, Medizinische Fakultät der Humboldt-Universität zu Berlin, Campus Virchow-Klinikum, Klinik für Strahlenheilkunde, Augustenburger Platz 1, D-13353 Berlin, Germany. lemke@charite.de
Kazi
Iris
I
de Bary
Philipp
P
Bernhardt
Ullrich
U
Foerster
Paul Ivan
PI
Foerster
Michael
M
Felix
Roland
R
D003198:Computer Simulation; D003287:Contrast Media; D004867:Equipment Design; D019786:Gadolinium DTPA; D008279:Magnetic Resonance Imaging; D019047:Phantoms, Imaging; D013223:Statistics as Topic
D003287:Contrast Media; D019786:Gadolinium DTPA