K.-J. Zülch – författare

Wilhelm Tönnis hatte am Ende seines Lebens vor, die Geschichte der deutschen Neurochirurgie an seinem Le­ bensbericht darzustellen. Er hat jedoch leider nur einen Torso, d. h. einzelne Kapitel hinterlassen können. Zu früh nahm ihm der Tod die Feder aus der Hand. Seine Freunde hielten es aber für wichtig, diese Berichte für die deutsche Neurochirurgie zu erhalten. Als Dr. Dr.h.c. mult. Heinz Götze sich bereit erklärt hatte, diesen Bericht in überarbeiteter Form im Springer-Verlag drucken zu lassen, habe ich diese Aufgabe übernommen. Mir schien es aber wichtig, zwischen den oft nur bruchstück­ haften Erinnerungen kurze Sachdarstellungen zu setzen, die den geschichtlichen Zusammenhang besser verständlich machen, in dem diese Einzelstücke stehen. Sie sind durch ein "Z" und Kursiv-Druck gekennzeichnet. Ich glaubte, diese Aufgabe übernehmen zu können, da ich einen großen Teil meines Lebens mit Wilhelm Tönnis - oder in seiner Nähe - verbracht habe. Ich hoffe, daß das - wenn auch bruchstückhafte - Ergebnis die Geschichte der deutschen Neurochirurgie lebendig erhalten kann. Ich erwähne hier dankbar die Hilfe durch Frau Herma Tönnis. An vielen Stellen habe ich Arbeiten aus der Literatur zitiert, damit bestimmte Angaben oder Anschauungen er­ weitert im Original nachgelesen werden können. Sicher ist dies keine vollständige Geschichte der deut­ schen Neurochirurgie geworden, doch hoffe ich, daß das Wirken von Wilhelm Tönnis für das Werden der deutschen V Neurochirurgie - deren Schöpfer er ja letzten Endes wa- im Gedächtnis der folgenden Generationen erhalten bleibt.

The aim of this book is to expand the clinical information given by computed tomograms (CTs) of cerebral infarcts. Anatomical sections are displayed parallel to the CT correlate in the hope that the interpretation of pathogenesis will provide valuable clinical data at a time when the number of angiographies performed in cerebrovascular cases has diminished rapidly. For better understanding of pathogenesis our concepts concerning the process of infarction have been summarized on the basis of schematic draw- ings. K.-J. ZULCH KOln Acknowledgments I am most grateful to Professor Hoeffk:en for permission to use computed tomograms from his institution, to Herr GOldner and Frau Miihlhover for their technical assistance, and to Frau Goldner for help during the editorial work. My particular thanks go to my friend Professor W.S. Fields, Houston, who undertook the great burden of styling the English text. My gratitude is expressed to Dr. Dr. h.c. multo Heinz Gotze and Springer- Verlag for the excellent layout and quality of this book.

The investigation of the brain by means of ultrasound has acquired increasing importance in the last years because it permits insight into the spatial relationships within the intact human skull in a short time without endangering the patient. The road from the first ultra­ sonic investigations on the exposed brain to the detection of intracranial midline shifts on the intact skull, the registration of echo pulsations and recently, to ultrasonotomography has been a long one already. However, this development is by no means at an end. Following the suggestion of numerous colleagues concerned with echo-encephalography in this country and abroad, the Neurosurgical Clinic of the University of Erlangen-Nuremberg organized an "International Symposium on Echo-Encephalography" on April 14th and 15th, 1967. Here there was an open exchange of experience on the results obtained up to the present. The limitations of the method and sources of error as well as the directions of future development of the ultrasonic echo procedure were discussed.

The investigation of the brain by means of ultrasound has acquired increasing importance in the last years because it permits insight into the spatial relationships within the intact human skull in a short time without endangering the patient. The road from the first ultra­ sonic investigations on the exposed brain to the detection of intracranial midline shifts on the intact skull, the registration of echo pulsations and recently, to ultrasonotomography has been a long one already. However, this development is by no means at an end. Following the suggestion of numerous colleagues concerned with echo-encephalography in this country and abroad, the Neurosurgical Clinic of the University of Erlangen-Nuremberg organized an "International Symposium on Echo-Encephalography" on April 14th and 15th, 1967. Here there was an open exchange of experience on the results obtained up to the present. The limitations of the method and sources of error as well as the directions of future development of the ultrasonic echo procedure were discussed.