[Theoretical principles and technical realization of high resolution nuclear magnetic resonance tomography with the example of a dedicated coil system].
The theory of high-resolution magnetic resonance imaging (MRI) and the physical properties of a dedicated coil system with its clinical application are reviewed. To evaluate the spatial resolution of the system, a phantom sample was depicted by a transverse T1-weighted sequence (time of repetition 500 ms, time of echo 25 ms, 256 x 256 matrix, 3 acquisitions, field of view 25 mm2). Relative signal intensity decrease was less using the 5-cm coil, as signal intensity field distribution depends on coil diameter. The phantom appeared as an attainable resolution of 100-microns pixel width using the 2.5-cm coil. For the 5-cm coil the pixel width was 200 microns, not accomplishing clear resolution of the phantom. Coil head choice depends on the anatomic depth of the target organ. Work-up of the skin and musculoskeletal lesions is the main indication for high-resolution MRI using surface coils.
Mäurer
J
J
Strahlenklinik und Poliklinik, Virchow-Klinikum, Medizinische Fakultät der Humboldt-Universität Berlin, Deutschland.
Requardt
H
H
Herrling
T
T
Knollmann
F D
FD
Schedel
H
H
Vogl
T J
TJ
Felix
R
R
D000125:Achilles Tendon / Q000293:injuries / Q000473:pathology; D002349:Carpal Tunnel Syndrome / Q000175:diagnosis; D004867:Equipment Design; D005383:Finger Injuries / Q000175:diagnosis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008475:Median Nerve / Q000473:pathology; D008953:Models, Anatomic; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis; D013708:Tendon Injuries / Q000175:diagnosis
Theoretische Grundlagen und technische Realisation der hochauflösenden Kernspintomographie (KST) am Beispiel eines dedizierten Spulensystems.