Videofluoroscopy Instrument to Identify the Tibiofemoral Contact Point Migration for Anterior Cruciate Ligament Reconstruction Follow-up: CINARTRO

Símini, Franco; Santos, Darío; Francescoli, Luis

doi:10.1088/1742-6596/705/1/012056

Cited by 4 publications

(9 citation statements)

References 9 publications

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“…We are working towards the design of a dedicated compact X-ray device, probably derived from veterinary equipment [20], which will allow us to design a simple, portable CINARTRO for routine clinical practice.…”

Section: Discussionmentioning

confidence: 99%

“…In order to correct the pin cushion distortion effect, we have designed a plastic device [20][21][22] with lead spheres separated by 10 mm in a two dimensional regular pattern (Figure 3). We called the device "Phantom" and it was placed in the sagittal plane the patients would be located subsequently.…”

Section: Image Quality Control To Reduce Pin Cushion Effectmentioning

confidence: 99%

“…Due to the relative intensifier/source geometry, the X-ray image taken of the Phantom pattern appears distorted. By matching the theoretical position of every lead sphere with their real position, our software [3,20] is able to correct the operatordefined fiducial points. We have put in practice the method published by Baltzopoulos [3] which minimizes a global error doi: 10.7243/2054-1945-5-4 function with linear algebra methods.…”

Section: Image Quality Control To Reduce Pin Cushion Effectmentioning

confidence: 99%

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Measurement of knee articulation laxity by videofluoroscopy image analysis: CINARTRO

Símini¹,

Santos²,

Artigas³

et al. 2017

Med Imaging Radiol

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Several methods are used to evaluate knee articulation during movement, such as the Tibio Femoral Contact Point migration or the Instantaneous Centre of Rotation displacement and even the Moment Arm variations during extension. Such evaluation is important in case of Anterior Cruciate Ligament reconstruction or Total Knee Replacement, but unfortunately, it is only available in research settings. We have devised a novel clinical methodology based on serial images of knee movement videofluoroscopy, which are interactively analysed to allow automatic determination of kinematics parameters. The method, called CINARTRO, compares values with the contralateral knee and produces a standard Clinical Document Architecture file ready for Electronic Medical Record systems. To correct the "pin cushion" effect of X ray intensifiers, a 10 mm apart lead spheres phantom was developed. To validate the interactive selection of anatomical points, cadaver limbs were marked with lead markers and compared with points marked on the blind image. Anterior Cruciate Ligament (injured and reconstructed) and contralateral Moment Arms averages of 53mm, 39mm and 43mm respectively were found. Similarly the Total Knee Replacement patient`s Moment Arm was reduced to 33mm. These findings justify the use of our methodology to help clinicians during rehabilitation follow-up.

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Section: Discussionmentioning

confidence: 99%

Section: Image Quality Control To Reduce Pin Cushion Effectmentioning

confidence: 99%

Section: Image Quality Control To Reduce Pin Cushion Effectmentioning

confidence: 99%

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Measurement of knee articulation laxity by videofluoroscopy image analysis: CINARTRO

Símini¹,

Santos²,

Artigas³

et al. 2017

Med Imaging Radiol

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“…To objectively determine the TFCP, we have used CINARTRO equipment which consists of a C-arm X-ray device with video data acquisition; hardware to digitize the images and a custom made software to calculate the percentage of migration of TFCP over the tibial plateau [4]. CINARTRO allows to measure the distance between the point of contact and the posterior tibial plateau extremity, for every VFC image in the three conditions (contralateral, injured and reconstructed) during a load-less active extension movement of the knee.…”

Section: Methodsmentioning

confidence: 99%

“…Anterior Cruciate Ligament (ACL) lesions account for 20% of knee lesions as a consequence of sports practice, as shown by epidemiological studies [2]. This yields an estimated 80,000 ACL lesions per year in the USA [3] and about 900 ACL ruptures in three-Million people Uruguay [4]. Diagnostic tests to confirm ACL tears include the Lachman test, the pivot shift test and the use of the KT 1000/2000 arthrometer [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of anterior cruciate ligament reconstructed patients should include both self-evaluation and anteroposterior joint movement estimation?

Santos¹,

Massa²,

Símini³

2015

Phys Ther Rehabil

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Background: The migration of the Tibio-femoral Contact Point of the Femur with respect to the tibial plateau is altered by the rupture of the Anterior Cruciate Ligament and again changed after reconstructive surgery, as shown by sequences of video fluoroscopic knee images during extension. Besides, subjective satisfaction of reconstructed knee function is assessed using the The Lysholm score and the Tegner activity scale. We have tested whether the subjective score is correlated to objective and dynamic joint anteroposterior movement after Anterior Cruciate Ligament reconstruction. Methods: The Lysholm score and the Tegner activity scale was obtained by personal interviews and we have designed a new simple procedure (called CINARTRO) with interactive determination of Tibio-femoral Contact Point in each one of 30 video fluoroscopic images during extension to output clinical reports. Contact Point migration is expressed as percentage of tibial plateau length. We have applied the method to 5 male patients whose Tegner activity score was 7 (competitive amateur sportsmen) and 25 (SD 3.6) years old. Results: Combination of subjective and clinical objective (quantitative & dynamic) estimation of Tibiofemoral Contact Point migration showed no correlation in the 5 patients: -0.46

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CINARTRO: Clinical Tool to Assess Knee Kinematics by Videofluoroscopy

Olivera

Rodriguez

Santos

et al. 2017

VII Latin American Congress on Biomedical Engineering CLAIB 2016, Bucaramanga, Santander, Colombia, October 26th -28th, 2016

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Videofluoroscopy Instrument to Identify the Tibiofemoral Contact Point Migration for Anterior Cruciate Ligament Reconstruction Follow-up: CINARTRO

Cited by 4 publications

References 9 publications

Measurement of knee articulation laxity by videofluoroscopy image analysis: CINARTRO

Measurement of knee articulation laxity by videofluoroscopy image analysis: CINARTRO

Evaluation of anterior cruciate ligament reconstructed patients should include both self-evaluation and anteroposterior joint movement estimation?

CINARTRO: Clinical Tool to Assess Knee Kinematics by Videofluoroscopy

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