Berlin 2005 – scientific programme

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AK: Akustik

AK 3: Ultraschall in Biologie und Medizin (Sitzungsorganisation: Robert Lemor, St. Ingbert)

AK 3.2: Talk

Saturday, March 5, 2005, 09:00–09:30, TU EB222

Scanning Acoustic Microscopy on Bone - Status and Perspectives — •Kay Raum — Q-BAM Group, Dept. of Orthopedics, Martin Luther University of Halle-Wittenberg, Germany

High frequency ultrasound has become one of the most powerful tools for the elastic characterization of hard materials since its invention by Lemons and Quate in 1974. Many of the imaging and measurement techniques developed for NDE were also applied for the characterization of bone. However, the heterogeneous structure at several levels of organization implies multi-fold problems, e.g. tissue preparation, validity and applicability of the measurement techniques, resolution limitations, interpretation of results, etc. Furthermore the technical development of commercially available high resolution SAM lacks far behind other quantitative imaging modalities. The talk will describe the acoustic microscopes developed in our group, concepts for acoustic impedance mapping with frequencies up to 1 GHz and techniques for determining longitudinal, shear and surface wave velocities. The relations of acoustic to elastic parameters, either directly derived from the acoustic measurement or obtained from micromechanical tests, are presented. Combinations with other experimental and clinical techniques demonstrate the potential of SAM for an improved diagnosis, both in experimental and in clinical studies.