Validation of a low-dose hybrid RSA and fluoroscopy technique: Determination of accuracy, bias and precision

Ioppolo, J. L.; Börlin, Niclas; Bragdon, Charles R.; Li, Mingguo; Price, Roger I.; Wood, David; Malchau, Henrik; Nivbrant, Bo

doi:10.1016/j.jbiomech.2006.01.012

Cited by 20 publications

(18 citation statements)

References 15 publications

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“…The exposure parameters were estimated from previous phantom studies (Allen et al, 2004;Ioppolo et al, 2007;Ma¨kinen et al, 2004;Ö nsten et al, 2001) and selected as 70 kVp at 16 mA s for both the new cage and the uniplanar cage, and 50 kVp at 4 mA s for the biplanar cage. The radiographic examinations were performed in a dedicated RSA lab with two ceiling-mounted X-ray units (Proteus XR/a, GE Medical Systems, Milwaukee, WI, USA) and digital images were acquired by a computed radiography digital X-ray system (Capsula X CR, FujiFilm, Tokyo, Japan), which provides 3520 Â 4280 image matrix for a 35 Â 43 cm cassette and 2364 Â 2964 matrix for a 24 Â 30 cm cassette.…”

Section: Phantom Validationmentioning

confidence: 99%

Development of an RSA calibration system with improved accuracy and precision

Cai

Yuan

Rorabeck

et al. 2008

Journal of Biomechanics

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Section: Phantom Validationmentioning

confidence: 99%

Development of an RSA calibration system with improved accuracy and precision

Cai

Yuan

Rorabeck

et al. 2008

Journal of Biomechanics

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“…It has the potential for accuracy surpassing that of optical tracking methods and approaching that of RSA with digital radiography. Work has been done previously to assess the accuracy, bias, and precision of RSA systems (Tashman and Anderst, 2003;Li et al, 2004;Ioppolo et al, 2007;Koning et al, 2007). Furthermore, one study used fRSA as the gold standard to quantify the accuracy of a skin-mounted tracking system .…”

Section: Introductionmentioning

confidence: 99%

Comparative accuracy of radiostereometric and optical tracking systems

Kedgley

Birmingham

Jenkyn

2009

Journal of Biomechanics

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“…Radiostereometric analysis (RSA) may be a way forward. RSA involves implantation of tantalum markers to analyze implant and joint micromotion and has been shown to be accurate [4,9,12,16,21]. Further work is needed to evaluate this technology for use in TDR ROM measurements.…”

Section: Discussionmentioning

confidence: 99%

Radiographic total disc replacement angle measurement accuracy using the Oxford Cobbometer: precision and bias

et al. 2008

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Total disc replacement (TDR) clinical success has been reported to be related to the residual motion of the operated level. Thus, accurate measurement of TDR range of motion (ROM) is of utmost importance. One commonly used tool in measuring ROM is the Oxford Cobbometer. Little is known however on its accuracy (precision and bias) in measuring TDR angles. The aim of this study was to assess the ability of the Cobbometer to accurately measure radiographic TDR angles. An anatomically accurate synthetic L4-L5 motion segment was instrumented with a CHARITE artificial disc. The TDR angle and anatomical position between L4 and L5 was fixed to prohibit motion while the motion segment was radiographically imaged in various degrees of rotation and elevation, representing a sample of possible patient placement positions. An experienced observer made ten readings of the TDR angle using the Cobbometer at each different position. The Cobbometer readings were analyzed to determine measurement accuracy at each position. Furthermore, analysis of variance was used to study rotation and elevation of the motion segment as treatment factors. Cobbometer TDR angle measurements were most accurate (highest precision and lowest bias) at the centered position (95.5%), which placed the TDR directly inline with the x-ray beam source without any rotation. In contrast, the lowest accuracy (75.2%) was observed in the most rotated and off-centered view. A difference as high as 4°between readings at any individual position, and as high as 6°between all the positions was observed. Furthermore, the Cobbometer was unable to detect the expected trend in TDR angle projection with changing position. Although the Cobbometer has been reported to be reliable in different clinical applications, it lacks the needed accuracy to measure TDR angles and ROM. More accurate ROM measurement methods need to be developed to help surgeons and researchers assess radiological success of TDRs.

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Validation of a low-dose hybrid RSA and fluoroscopy technique: Determination of accuracy, bias and precision

Cited by 20 publications

References 15 publications

Development of an RSA calibration system with improved accuracy and precision

Development of an RSA calibration system with improved accuracy and precision

Comparative accuracy of radiostereometric and optical tracking systems

Radiographic total disc replacement angle measurement accuracy using the Oxford Cobbometer: precision and bias

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