Magnetic Resonance Imaging (MRI) of fingers with a high spatial resolution using a low-field magnetic system.
For our low-field resistive MRI-System we have developed suitable rf-probes to be able to image fingers with a possibly high spatial resolution. To reduce the measurement time and to improve the signal/noiseratio, which is inherently bad in a low field system, we used a multi-echo sequence, accumulating up to six echo signals for each image. For a 256 x 256 pixel matrix we achieved with this technique a spatial resolution of 176 microns/pixel in measuring times between 4 and 5 minutes. In comparison to healthy persons also first MR-images of patients suffering on arthrosis at the fingers and small joint injures were acquired. Using a 512 x 512 pixel matrix and a field of view of 5 cm images with a resolution of 80 microns/pixel were recorded in a total measuring time of less than 10 minutes.
Höpfel
D
D
Institut für Innovation und Transfer der FH Karlsruhe-Hochschule für Technik Sensorsystemtechnik. dieter.hoepfel@fh-karlsruhe.de
Kaniantoko
K
K
Terekhov
M
M
D005383:Finger Injuries / Q000175:diagnosis*; D005384:Finger Joint / Q000473:pathology*; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D008280:Magnetics; D010003:Osteoarthritis / Q000175:diagnosis*; D012680:Sensitivity and Specificity