Abstract
RATIONALE AND OBJECTIVES. Accurate registration of computed tomography (CT) images to the patient is crucial for computer-assisted surgery. Markers used in roentgen stereogrammetric analysis (RSA) can be located in a CT scan using a novel approach and also can be located physically. Roentgen stereo- grammetric analysis data act as 'ground truth' for the three-dimensional marker locations. METHODS. Two foam-bone phantoms were marked. The markers were scanned seven times with RSA, three times with axial CT, and contacted four times with a coordinate measuring arm. Root-mean-square (RMS) errors were derived for the registrations. RESULTS. Computed tomography and RSA data register to 0.15 mm RMS error. Computed tomography and arm data register to 0.25 mm. The markers are biocompatible, and the coordinate measuring arm is usable in an operating room. CONCLUSIONS. Typical in vitro registration errors are approximately 2 mm. The authors have developed a marker that provides superior registration, and a procedure that can be used for in vivo studies.
| Original language | English |
|---|---|
| Pages (from-to) | 658-667 |
| Number of pages | 10 |
| Journal | Investigative Radiology |
| Volume | 31 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1996 |
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Keywords
- computed tomography
- computer-assisted surgery
- Registration
- validation
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
Cite this
Use of a biocompatible fiducial marker in evaluating the accuracy of computed tomography image registration. / Ellis, Randy; Toksvig-Larsen, Søren; Marcacci, Maurilio; Caramella, Davide; Fadda, Marco.
In: Investigative Radiology, Vol. 31, No. 10, 10.1996, p. 658-667.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Use of a biocompatible fiducial marker in evaluating the accuracy of computed tomography image registration
AU - Ellis, Randy
AU - Toksvig-Larsen, Søren
AU - Marcacci, Maurilio
AU - Caramella, Davide
AU - Fadda, Marco
PY - 1996/10
Y1 - 1996/10
N2 - RATIONALE AND OBJECTIVES. Accurate registration of computed tomography (CT) images to the patient is crucial for computer-assisted surgery. Markers used in roentgen stereogrammetric analysis (RSA) can be located in a CT scan using a novel approach and also can be located physically. Roentgen stereo- grammetric analysis data act as 'ground truth' for the three-dimensional marker locations. METHODS. Two foam-bone phantoms were marked. The markers were scanned seven times with RSA, three times with axial CT, and contacted four times with a coordinate measuring arm. Root-mean-square (RMS) errors were derived for the registrations. RESULTS. Computed tomography and RSA data register to 0.15 mm RMS error. Computed tomography and arm data register to 0.25 mm. The markers are biocompatible, and the coordinate measuring arm is usable in an operating room. CONCLUSIONS. Typical in vitro registration errors are approximately 2 mm. The authors have developed a marker that provides superior registration, and a procedure that can be used for in vivo studies.
AB - RATIONALE AND OBJECTIVES. Accurate registration of computed tomography (CT) images to the patient is crucial for computer-assisted surgery. Markers used in roentgen stereogrammetric analysis (RSA) can be located in a CT scan using a novel approach and also can be located physically. Roentgen stereo- grammetric analysis data act as 'ground truth' for the three-dimensional marker locations. METHODS. Two foam-bone phantoms were marked. The markers were scanned seven times with RSA, three times with axial CT, and contacted four times with a coordinate measuring arm. Root-mean-square (RMS) errors were derived for the registrations. RESULTS. Computed tomography and RSA data register to 0.15 mm RMS error. Computed tomography and arm data register to 0.25 mm. The markers are biocompatible, and the coordinate measuring arm is usable in an operating room. CONCLUSIONS. Typical in vitro registration errors are approximately 2 mm. The authors have developed a marker that provides superior registration, and a procedure that can be used for in vivo studies.
KW - computed tomography
KW - computer-assisted surgery
KW - Registration
KW - validation
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UR - http://www.scopus.com/inward/citedby.url?scp=0029793771&partnerID=8YFLogxK
U2 - 10.1097/00004424-199610000-00008
DO - 10.1097/00004424-199610000-00008
M3 - Article
VL - 31
SP - 658
EP - 667
JO - Investigative Radiology
JF - Investigative Radiology
SN - 0020-9996
IS - 10
ER -