Feasibility of using real‐time MRI to measure joint kinematics in 1.5T and open‐bore 0.5T systems

Draper, Christine E.; Santos, Juan M.; Kourtis, Lampros; Besier, Thor F.; Fredericson, Michael; Beaupré, Gary S.; Gold, Garry E.; Delp, Scott L.

doi:10.1002/jmri.21413

Cited by 41 publications

(48 citation statements)

References 56 publications

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“…11 Techniques such as real-time ultrafast MRI using a combination of a fast low-angle shot (FLASH) or true fast imaging with steady-state precession (FISP) sequence with radial data sampling and view sharing of successive acquisitions allow for high-speed and motion-robust examinations. 12-17 This allows for a temporal resolution of up to 50 milliseconds per frame and low-latency online display of the images without the need for offline processing on external hardware.…”

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confidence: 99%

Clinical Utility of Continuous Radial Magnetic Resonance Imaging Acquisition at 3 T in Real-time Patellofemoral Kinematic Assessment: A Feasibility Study

Burke

Kaplan

Block

et al. 2018

Arthroscopy: The Journal of Arthroscopic & Related Surgery

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Purpose To compare patellar instability with magnetic resonance imaging analysis using continuous real-time radial gradient-echo (GRE) imaging in the assessment of symptomatic patients and asymptomatic subjects. Methods Symptomatic patients with suspected patellofemoral maltracking and asymptomatic volunteers were scanned in real time by a radial 2-dimensional GRE sequence at 3 T in axial orientation at the patella level through a range of flexion-extension. The degree of lateral maltracking, as well as the associated tibial tubercle–trochlear groove distance and trochlea depth, was measured. Patellar lateralization was categorized as normal (≤2 mm), mild (>2 to ≤5 mm), moderate (>5 to ≤10 mm), or severe (>10 mm). The patellofemoral cartilage was also assessed according to the modified Outerbridge grading system. Results The study included 20 symptomatic patients (13 women and 7 men; mean age, 36 ± 12.8 years) and 10 asymptomatic subjects (3 women and 7 men; mean age, 33.1 years). The mean time to perform the dynamic component ranged from 3 to 7 minutes. Lateralization in the symptomatic group was normal in 10 patients, mild in 1, moderate in 8, and severe in 1. There was no lateral tracking greater than 3 mm in the volunteer group. Lateral maltracking was significantly higher in symptomatic patients than in asymptomatic subjects (4.4 ± 3.7 mm vs 1.5 ± 0.71 mm, P = .007). Lateral tracking significantly correlated with tibial tubercle–trochlear groove distance (r = 0.48, P = .006). There was excellent agreement on lateral tracking between the 2 reviewers (intraclass correlation coefficient, 0.979; 95% confidence interval, 0.956-0.990). Conclusions The inclusion of a dynamic radial 2-dimensional GRE sequence is a rapid and easily performed addition to the standard magnetic resonance imaging protocol and allows dynamic quantitative assessment of patellar instability and lateral maltracking in symptomatic patients. With a paucity of reported data using this technique confirming that these results reach clinical significance, future work is required to determine how much lateral tracking is clinically significant. Level of Evidence Level III, case control.

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confidence: 99%

Clinical Utility of Continuous Radial Magnetic Resonance Imaging Acquisition at 3 T in Real-time Patellofemoral Kinematic Assessment: A Feasibility Study

Burke

Kaplan

Block

et al. 2018

Arthroscopy: The Journal of Arthroscopic & Related Surgery

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“…In a preclinical study, adequate tracking of the area of interest has been demonstrated up to speeds of 1.5 cm per second using a phantom [9]. In another phantom study, measurement accuracies within 2 mm were possible up to velocities of 38 mm per second [16].…”

Section: Discussionmentioning

confidence: 98%

Clinical feasibility of a magnetic resonance tracking system to guide the position of the scan plane during physiologic joint motion

et al. 2009

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“…With respect to dynamic MRI, our method is less expensive and more accurate [4]. Compared to actual clinical procedures, that are based on a previous static CT or MRI scan and a manual fitting of the shape, this method is less expensive (as CT and MRI can be avoided) and more accurate due to the automatic fitting.…”

Section: Discussionmentioning

confidence: 99%

“…However, it can only be used with relatively slow movements, and the accuracy obtained increases from 1mm to more than 3mm depending from the velocity of the movement. In addition, MRI scans are highly expensive [4]. Traditional CT and MRI provide an accurate evaluation of the morphology of the knee, but are limited to static positioning of the patient.…”

Section: Fig8 : "Exted" -> "Extend"mentioning

confidence: 99%

Fluoroscopy-based tracking of femoral kinematics with statistical shape models

Valenti

Momi

et al. 2015

Int J CARS

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Abstract:Purpose Precise knee kinematics assessment helps to diagnose knee pathologies and to improve the design of customized prosthetic components. The first step in identifying knee kinematics is to assess the femoral motion in the anatomical frame. However, no work has been done on pathological femurs, whose shape can be highly different from healthy ones. Method We propose a new femoral tracking technique based on Statistical Shape Models (SSMs) and two calibrated fluoroscopic images, taken at different flexion-extension angles. The cost function optimization is based on genetic algorithms, to avoid local minima. The proposed approach was evaluated on 3 sets of digitally reconstructed radiographic images of osteoarthritic patients. Results It is found that using the estimated shape, rather than that calculated from CT, significantly reduces the pose accuracy, but still has reasonably good results (angle errors around 2 degrees, translation around 1.5mm). Cover Letter. Powered by Editorial Manager® and ProduXion Manager® from Aries Systems CorporationThe authors thank the reviewers and the editor for their interest in this topic and for giving them the possibility to improve the paper with their comments. Hereunder we answer the questions arisen, with indications on the changes made to the manuscript According to the reviewer comment, we modified the text in the "State of the Art" section as follows:"Knee kinematics assessment has great importance both to understand the problems associated with a large number of knee pathologies and to improve the design of prosthetic components. In case of severe osteoarthritis, that are eligible for joint implant surgery, in vivo pre-operatory knee kinematics is fundamental to understand the relative motion between the three joint bones. The relative movement can give an insight of how the ligaments are stretched and their stability, and how could be the feeling for the patient. In this way, pre operatory knee kinematics could help the surgeon to decide which prosthesis should be used and how to correct the misalignment of the bones [3]. Currently, the reconstruction of the pose of the knee can be done using 3D scans such as real-time Magnetic Resonance Imaging (MRI) or through a 2D/3D registration method that superimposes the shape extracted from MRI or Computed Tomography (CT) onto an image, usually X-ray or fluoroscopy. Real-time MRI is suitable to study joint kinematics, as it evidences the muscle structure during movements. However, it can only be used with relatively slow movements, and the accuracy obtained increases from 1mm to more than 3mm depending on the velocity of the movement. In addition, MRI scans are highly expensive [4]. Traditional CT and MRI provide an accurate evaluation of the morphology of the knee, but are limited to static positioning of the patient.[…]The use of dynamic fluoroscopy to detect knee kinematics is described in [12]. The authors use a fluoroscopic system flashing at 30Hz, obtaining continuous images of the knee flexion from 0° to 120°...

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Feasibility of using real‐time MRI to measure joint kinematics in 1.5T and open‐bore 0.5T systems

Cited by 41 publications

References 56 publications

Clinical Utility of Continuous Radial Magnetic Resonance Imaging Acquisition at 3 T in Real-time Patellofemoral Kinematic Assessment: A Feasibility Study

Clinical Utility of Continuous Radial Magnetic Resonance Imaging Acquisition at 3 T in Real-time Patellofemoral Kinematic Assessment: A Feasibility Study

Clinical feasibility of a magnetic resonance tracking system to guide the position of the scan plane during physiologic joint motion

Fluoroscopy-based tracking of femoral kinematics with statistical shape models

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