[CT evaluation of extravascular perfusion of contrast medium and its potential to a new method of diagnosis: an experimental study using macro, micro-molecular contrast media].
Nihon Igaku Hoshasen Gakkai Zasshi
; 54(4): 289-91, 1994 Mar 25.
Article
en Ja
| MEDLINE
| ID: mdl-8177705
ABSTRACT
To evaluate the dynamics of extravascular perfusion, dynamic CT with two different molecular sized contrast media was performed on VX2 tumor of rabbit. The first dynamic CT was performed with a bolus injection of iopamidol (IP120 mgI/ml, 5 ml). After ascertaining that the tumor attenuation had returned to the pre-contrast level, the second dynamic CT was performed on the same slice with bolus injection of iodoethylated starch (IES120 mgI/ml). The time-density (T-D) curves of the same tumor area on the images obtained by two contrast media were compared. The T-D curve with IP showed definitely higher level than that with IES. This occurrence can be explained that IP, 13 A in size, has higher permeability distributing not only in the intravascular space, but also into the extravascular space. On the other hand, IES, 200 A in size, will stay mostly in the intravascular space. From this, we consider that the attenuation difference between the two curves will be an indicator for the dynamics of extravascular perfusion, suggesting to become a new method for CT diagnosis.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tomografía Computarizada por Rayos X
/
Medios de Contraste
/
Extravasación de Materiales Terapéuticos y Diagnósticos
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
Ja
Revista:
Nihon Igaku Hoshasen Gakkai Zasshi
Año:
1994
Tipo del documento:
Article