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In spite of the dramatic development in CT, there was no major breakthrough in the iodinated contrast media development. New agents based on hybrid between MRI and CT compounds may be a new innovative alternative. This new approach may also open new indications such as radiotherapy.

Backscattering yields of 300 keV protons are measured under channeling (χch), blocking (χb1) and double alignment (χda) conditions on (111)-silicon cry-stals. It was established that the relation χch χb1 = χda is fulfilled within an experimental error of 10% for clean surfaces as well as for vacuum deposited layers on the crystal surface.

Temperature measurements are reported effected by aid of thermocouples enclosed in tubules in TEP-implantations of the hip. Two techniques were employed: the first using as acrylic bone cement Palacos® or Sulfix-6 without concomitant cooling, the second Palacos® after precooling of the femur with crushed ice/water mixtures.

We describe an 11-year-old girl suffering from recurrent meningitis with a complete absence of the seventh component of complement (C7). Diagnosis was established by haemolytic titration and western blotting. The patient's serum lacked the 85 kDa C7 chain. Haemolytic activity of serum was reconstituted with either pooled normal human serum or with purified C7. The relatives (parents and one sister) had halfnormal levels of both immunochemically and functionally determined C7, indicating a heterozygous state for C7 deficiency.

Kallmann's syndrome is generally assessed by history and subjective tests of olfactory function. In this study three patients suffering from Kallmann's syndrome were investigated with more objective techniques, including the recording of chemosensory evoked potentials (CSEPs). After testing olfactory function by means of a simple odor identification test, anosmia was confirmed in only one patient, since the other two patients were able to distinguish between several odorants. However, investigations in which CSEPs were employed indicated that all three patients had complete loss of their olfaction as well as hypersensitivity of the trigeminal nerve. These findings prove the usefulness of CSEPs in clinical investigations of the sense of smell.

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