gms | German Medical Science

55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

25. bis 28.04.2004, Köln

Methods for objective display of areas with contrast medium uptake in MRI scans

Methoden objektiver Darstellung von Arealen mit Kontrastmittelaufnahme in NMR-Bildern

Meeting Abstract

Suche in Medline nach

  • corresponding author Andreas Dötterl - Neurochirurgische Klinik und Poliklinik, Klinikum rechts der Isar der Technischen Universität München, München
  • A. E. Trappe - Neurochirurgische Klinik und Poliklinik, Klinikum rechts der Isar der Technischen Universität München, München

Deutsche Gesellschaft für Neurochirurgie. Ungarische Gesellschaft für Neurochirurgie. 55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie. Köln, 25.-28.04.2004. Düsseldorf, Köln: German Medical Science; 2004. DocP 08.89

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2004/04dgnc0372.shtml

Veröffentlicht: 23. April 2004

© 2004 Dötterl et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Objective

The complete information about the localization and intensity of contrast medium (CM) uptake in MRI scans is contained in two different images, T1+CM and T1 plain. To obtain this information, which is rather metainformation, an evaluation of both images is mandatory, and is mainly performed by mental, to-and-fro, comparison. Changes in intensity stand for areas of CM uptake. We describe two techniques to objectively present this metainformation.

Methods

The first technique obtains the demanded information by subtracting both corresponding images as known and performed by the method of Digital Subtraction Angiography (DSA). The second technique applies the RGB-Transformation (red, green, blue) with the attachment of the T1+CM to the red color channel, and the T1 plain to the green and blue channels. These three color channels then are additively combined to one color image by a computer program which was developed at our clinic.

Results

The subtraction technique clearly displays the areas of CM uptake. However, adjacent anatomical structures and their relationship to the areas in question are not visible. This fact is the advantage of the latter technique: Here CM is coded in a red color whereas the surrounding tissue is clearly displayed as in the original scans. Sometimes it may appear in a light cyan hue.

Conclusions

The subtraction technique allows a quick evaluation of areas with CM uptake. Its disadvantage, however, is a poor demonstration of anatomical relationships. With the ongoing computerization of hospitals it is no problem to apply RGB-Transformation to receive optimal images with an objective display of CM-dependent changes in red within the originally included anatomical structures. The intuitive evaluation is thus more exact, easy and quick, especially in cases with only slight CM uptake.