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.
Original language | English (US) |
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Pages (from-to) | 735-742 |
Number of pages | 8 |
Journal | RADIOLOGY |
Volume | 188 |
Issue number | 3 |
State | Published - Sep 1993 |
Keywords
- Computed tomography (CT), three-dimensional, 10.12117, 20.12117
- Computers, examination control
- Skull, abnormalities, 10.1439
- Skull, neoplasms, 125.3641, 239.373
- Stereotaxis, 10.1299, 20.1299
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging