Analysis of tibial rotation using magnetic resonance imaging

Samukawa, Mina; Yamamoto, Toru; Miyamoto, Shigenori; Yamaguchi, Aogu; Katayose, Masaki

doi:10.1016/j.math.2009.01.003

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…All subjects had axial CT scanning performed on bilateral knees at 0° and 30° of flexion in the supine position, with the limbs fixed by equipment to support the joint at the correct angle. The flexion angle was monitored using a handheld goniometer.…”

Section: Methodsmentioning

confidence: 99%

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Zhang

Wang

Niu

et al. 2016

Orthopaedic Surgery

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Section: Methodsmentioning

confidence: 99%

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Zhang

Wang

Niu

et al. 2016

Orthopaedic Surgery

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“…Huang [13] and Liu et al [14] studied the formation and stability of gas layer film during GAE by means of experiments and simulations, and it was proved that the use of gas-assisted method can effectively eliminate some bad phenomena, such as extrusion expansion, pressure drop during extrusion, and the interface instability. For decades, many investigations in this filed, both experiments and simulations, [15][16][17][18][19][20][21][22][23][24][25][26][27] have shown the prospect and superiority of GAE technology, and many scholars [28][29][30][31][32][33][34][35][36][37] have demonstrated that GAE promotes the melt slippage phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental studies on the effect of thickness difference between up and down gas layers on sheet polymer gas‐assisted extrusion forming

Jiang

Liu

Huang

et al. 2020

Polymer Engineering & Sci

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In this study, to make gas-assisted extrusion (GAE) can be better applied to conventional horizontal extrusion forming process, the thickness difference between up and down gas layer was simulated for the first time by GAE of molten high-density polyethylene sheet. In order to ascertain the effects of the thickness difference of up and down gas layers on sheet extrusion molding, a method based on the model of two-phase (gas and melt) flow was put forward, and an outer-layer GAE isothermal numerical simulation made by POLYFLOW was explored and researched. The numerical results analysis indicated that when the thickness of down gas layer is increased, the velocities, pressure drop and shear rate of the melt increase. Compared with the simplified-GAE simulation, GAE simulation method can well reflect the flow characteristics, the physical field distribution, and the morphology changes of melt extrudates. The experimental results show that with the increase of the thickness of the down gas layer, the melt falling can be obviously improved during extrusion. Thus, in the actual use of GAE for sheet production, not only the thickness difference between up and down gas layers should be reasonably controlled, but also other factors, such as melt inlet volume flow rate, gas pressure and temperature should be controlled accordingly. Finally, GAE forming technology can give full play to its advantages.

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“…5 Although the biomechanical perspective of SHM established, their values reported varying widely. 3,4,[6][7][8][9][10][11] The reason for the difference in values of SHM was affected by the various experimental environment, conditions, and measuring equipment. 10 Since the study of SHM using autopsy specimen, various kinematic studies have been conducted on living persons.…”

Section: Introductionmentioning

confidence: 99%

“…10 Since the study of SHM using autopsy specimen, various kinematic studies have been conducted on living persons. 6,9,12 Three-dimensional magnetic resonance imaging is a non-invasive method of obtaining precise anatomic and geometric information for in vivo studies of musculoskeletal biomechanics. 9 However, this method is difficult to reflect dynamic knee movements as a method to analyze a series of images taken under static conditions.…”

Section: Introductionmentioning

confidence: 99%

“…6,9,12 Three-dimensional magnetic resonance imaging is a non-invasive method of obtaining precise anatomic and geometric information for in vivo studies of musculoskeletal biomechanics. 9 However, this method is difficult to reflect dynamic knee movements as a method to analyze a series of images taken under static conditions. 6 Although the roentgen stereophotogrammetric analysis applied to determine dynamic studies of in vivo knee kinematics, it could lead to unnecessary exposure to radiation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detection and Quantification of Screw-Home Movement Using Nine-Axis Inertial Sensors

Jeon

Lee

et al. 2019

J Kor Phys Ther

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Purpose: Although previous studies on the screw-home movement (SHM) for autopsy specimen and walking of living persons conducted, the possibility of acquiring SHM based on inertial measurement units received little attention. This study aimed to investigate the possibility of measuring SHM for the non-weighted bearing using a micro-electro-mechanical system-based wearable motion capture system (MEMSS). Methods: MEMSS and camera-based motion analysis systems were used to obtain kinematic data of the knee joint. The knee joint moved from the flexion position to a fully extended position and then back to the start point. The coefficient of multiple correlation and the difference in the range of motion were used to assess the waveform similarity in the movement measured by two measurement systems. Results: The waveform similarity in the sagittal plane was excellent and the in the transverse plane was good. Significant differences were found in the sagittal plane between the two systems (p< 0.05). However, there was no significant difference in the transverse plane between the two systems (p> 0.05). Conclusion:The SHM during the passive motion without muscle contraction in the non-weighted bearing appeared in the entire range. We thought that the MEMSS could be easily applied to the acquisition of biomechanical data on the knee related to physical therapy.

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Analysis of tibial rotation using magnetic resonance imaging

Cited by 5 publications

References 23 publications

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Numerical and experimental studies on the effect of thickness difference between up and down gas layers on sheet polymer gas‐assisted extrusion forming

Detection and Quantification of Screw-Home Movement Using Nine-Axis Inertial Sensors

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