Towards accurate, robust and practical ultrasound-CT registration of vertebrae for image-guided spine surgery.
Int J Comput Assist Radiol Surg
; 6(4): 523-37, 2011 Jul.
Article
en En
| MEDLINE
| ID: mdl-20976567
ABSTRACT
PURPOSE:
Accurate registration of patient anatomy and preoperative computed tomography (CT) images is key to successful image-guided spine surgery. Current manual landmark and surface-based techniques are time-consuming and not always accurate. Intraoperative ultrasound imaging of the vertebrae, combined with automated registration, could improve surgery by improving accuracy, reducing operative time, and decreasing invasiveness.METHODS:
We present a simple ultrasound-CT registration technique that is automated, accurate, and robust. Registration is achieved by aligning the posterior vertebral surface, extracted from both CT and ultrasound images, using a forward and a backward scan line tracing method, respectively. The registration technique is validated using a simple plastic phantom in a water bath and a more realistic porcine cadaver in a simulation of open back surgery.RESULTS:
Clinically relevant accuracy was estimated by comparing automated registrations with gold standard imaging fiducial-based reference transformations, which yielded target registration errors of under 1 mm for the plastic phantom and under 1.6 mm for the porcine cadaver.CONCLUSIONS:
Our registration technique demonstrates good accuracy and robustness under clinically realistic conditions and thus warrants further studies on its surgical application.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Enfermedades de la Columna Vertebral
/
Columna Vertebral
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Tomografía Computarizada por Rayos X
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Cirugía Asistida por Computador
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Neuronavegación
Tipo de estudio:
Diagnostic_studies
/
Guideline
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Int J Comput Assist Radiol Surg
Asunto de la revista:
RADIOLOGIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Canadá