Frameless stereotaxic integration of CT imaging data: accuracy and initial applications.
Radiology
; 188(3): 735-42, 1993 Sep.
Article
em En
| MEDLINE
| ID: mdl-8351341
ABSTRACT
To evaluate the spatial accuracy of a rapid interactive method of transferring computed tomographic (CT) information between its display on a computer screen to its source (test object, operating field), a multidimensional computer combined with a six-jointed position-sensing mechanical arm was tested with a Plexiglas model consisting of 50 rods of varied height and known location, a plastic replica of the skull, and, subsequently, three patients. The median error value between image and real location was 1-2 mm (P > .95), regardless of the registration target sites. The accuracy, however, increased with the selection of widespread registration points, and 95% of all errors were below 3.70 mm (P > .95). The results compare favorably with the four most commonly used stereotaxic framed units. A misregistration error of 0.3-2.2 mm was found during intraoperative correlation between anatomy on the CT display and actual anatomic location in the operative field.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Crânio
/
Tomografia Computadorizada por Raios X
/
Técnicas Estereotáxicas
Tipo de estudo:
Prognostic_studies
Limite:
Child
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Radiology
Ano de publicação:
1993
Tipo de documento:
Article