Purpose: dinamic roentgen stereophotogrammetric analysis (RsA), a technique currently based only on customized radiographic equipment, has been shown to be a very accurate method for detecting threedimensional (3D) joint motion. the aim of the present work was to evaluate the applicability of an innovative RsA set-up for in vivo knee kinematic analysis, using a biplane fluoroscopic image system. to this end, the Authors describe the set-up as well as a possible protocol for clinical knee joint evaluation. the accuracy of the kinematic measurements is assessed. Methods: the Authors evaluated the accuracy of 3D kinematic analysis of the knee in a new RsA set-up, based on a commercial biplane fluoroscopy system integrated into the clinical environment. the study was organized in three main phases: an in vitro test under static conditions, an in vitro test under dynamic conditions reproducing a flexion-extension range of motion (RoM), and an in vivo analysis of the flexionextension RoM. For each test, the following were calculated, as an indication of the tracking accuracy: mean, minimum, maximum values and standard deviation of the error of rigid body fitting. Results: in terms of rigid body fitting, in vivo test errors were found to be 0.10±0.05 mm. Phantom tests in static and kinematic conditions showed precision levels, for translations and rotations, of below 0.1 mm/0.2º and below 0.5 mm/0.3º respectively for all directions. Conclusions: the results of this study suggest that kinematic RsA can be successfully performed using a standard clinical biplane fluoroscopy system for the acquisition of slow movements of the lower limb. Clinical relevance: a kinematic RsA set-up using a clinical biplane fluoroscopy system is potentially applicable and provides a useful method for obtaining better characterization of joint biomechanics.

Evaluation of RSA set-up from a clinical biplane fluoroscopy system for 3D joint kinematic analysis / Bonanzinga, Tommaso; Signorelli, Cecilia; Bontempi, Marco; Russo, Alessandro; Zaffagnini, Stefano; Marcacci, Maurilio; Bragonzoni, Laura. - In: JOINTS. - ISSN 2282-4324. - STAMPA. - 4:2(2016), pp. 121-125. [10.11138/jts/2016.4.2.121]

Evaluation of RSA set-up from a clinical biplane fluoroscopy system for 3D joint kinematic analysis

BONANZINGA, TOMMASO;BONTEMPI, MARCO;RUSSO, ALESSANDRO;ZAFFAGNINI, STEFANO;MARCACCI, MAURILIO;BRAGONZONI, LAURA
2016

Abstract

Purpose: dinamic roentgen stereophotogrammetric analysis (RsA), a technique currently based only on customized radiographic equipment, has been shown to be a very accurate method for detecting threedimensional (3D) joint motion. the aim of the present work was to evaluate the applicability of an innovative RsA set-up for in vivo knee kinematic analysis, using a biplane fluoroscopic image system. to this end, the Authors describe the set-up as well as a possible protocol for clinical knee joint evaluation. the accuracy of the kinematic measurements is assessed. Methods: the Authors evaluated the accuracy of 3D kinematic analysis of the knee in a new RsA set-up, based on a commercial biplane fluoroscopy system integrated into the clinical environment. the study was organized in three main phases: an in vitro test under static conditions, an in vitro test under dynamic conditions reproducing a flexion-extension range of motion (RoM), and an in vivo analysis of the flexionextension RoM. For each test, the following were calculated, as an indication of the tracking accuracy: mean, minimum, maximum values and standard deviation of the error of rigid body fitting. Results: in terms of rigid body fitting, in vivo test errors were found to be 0.10±0.05 mm. Phantom tests in static and kinematic conditions showed precision levels, for translations and rotations, of below 0.1 mm/0.2º and below 0.5 mm/0.3º respectively for all directions. Conclusions: the results of this study suggest that kinematic RsA can be successfully performed using a standard clinical biplane fluoroscopy system for the acquisition of slow movements of the lower limb. Clinical relevance: a kinematic RsA set-up using a clinical biplane fluoroscopy system is potentially applicable and provides a useful method for obtaining better characterization of joint biomechanics.
2016
Evaluation of RSA set-up from a clinical biplane fluoroscopy system for 3D joint kinematic analysis / Bonanzinga, Tommaso; Signorelli, Cecilia; Bontempi, Marco; Russo, Alessandro; Zaffagnini, Stefano; Marcacci, Maurilio; Bragonzoni, Laura. - In: JOINTS. - ISSN 2282-4324. - STAMPA. - 4:2(2016), pp. 121-125. [10.11138/jts/2016.4.2.121]
Bonanzinga, Tommaso; Signorelli, Cecilia; Bontempi, Marco; Russo, Alessandro; Zaffagnini, Stefano; Marcacci, Maurilio; Bragonzoni, Laura
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/566037
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