8 musculi graciles of human cadavers were examined sonographically by means of high-frequency ultrasound probes (10 MHz) to evaluate the echo texture of skeletal muscles. It could be shown that the smallest structures of skeletal muscles that may be differentiated sonographically are the primary bundles. In addition, 100 patients with clinically suspected muscular trauma and 8 patients with neuromuscular diseases were examined via high-frequency ultrasound probes (10 or 7.5 MHz). The typical signs of muscle tears and neuromuscular diseases in relation to normal sonomorphology are discussed. The special value of the method in these indications is emphasised.

Es wurden 8 Musculi graciles von menschlichen Leichen sonographisch unter Anwendung eines hochfrequenten Ultraschallkopfes (10 MHz) untersucht, um die normale Sonomorphologie der Skelettmuskulatur zu erarbeiten. Es konnte gezeigt werden, daß die kleinsten sonographisch noch differenziorbaren Strukturen die sogenannten primären Muskelbündel sind. Weiters wurden 100 Patienten mit klinisch vermuteter Muskelverletzung und 8 Patienten mit neuromuskulären Erkrankungen unter Anwendung hochfrequenter Ultraschallköpfe (10 oder 7,5 MHz) untersucht. Die typischen sonographischen Zeichen von Muskelrissen und neuromuskulären Erkrankungen werden dargelegt und im Vergleich zur normalen Sonomorphologie diskutiert. Es wird auf den hohen Wert dieser Untersuchungsmethode hingewiesen.

Heavy-ion hot-fusion reactions with actinide targets have been extensively used to produce relatively neutron- rich superheavy elements (SHE), i.e. elements with at- omic numbers Z 104. In these reactions surviving SHE nuclei are usually formed after evaporation of four or more neutrons. Consequently, up to now only 4n and 5n evaporation channels have been exploited in the synthesis of SHE with beams up to Z = 16. Lower xn channels were not studied, probably due to the fact that the magnitude of the 3n channel was decreasing rapidly in the sequence of carbon, nitrogen, and oxygen induced reactions. This has commonly been interpreted as the vanishing of the 3 n channel with increasing atomic number of the projecti le. In this work, we report the successful search for the 3 n evaporation channel product of the hot fusion reaction 26 Mg + 248 Cm the new isotope 271 Hs.