Assessment of Congruence Angle according to the Central X-ray in the Merchant View of Patellofemoral Joint

Kim, Hyun‐Jin; Joo, Yeong-chul; Choi, Jaeho; Lim, Wootaek

doi:10.17946/jrst.2019.42.6.423

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…Most of the existing studies on patellar–femoral joint observation determined patellar dislocation and subluxation by measuring the congruence and sulcus angles [ 15 , 19 , 20 ]. To measure this in the Merchant method, the long axis of the femur must be parallel to the surface of the examination table using an auxiliary device.…”

Section: Discussionmentioning

confidence: 99%

Development of an Auxiliary Device for Patellar and Femoral Joint Tangential Axial Radiographic Imaging and a Method for Obtaining an Optimal Radiographic Image Using the Development

Rhee

Kim

Kwon

et al. 2022

Applied Bionics and Biomechanics

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This study evaluated the accuracy of tangential axial radiography of the patellar and femoral joint using an auxiliary device based on three image evaluation criteria, which we named the patellofemoral joint radiography auxiliary device (PJR). To compare the PJR method with conventional radiographic methods, such as Laurin, Merchant, and Settegast, a whole-body phantom (PBU-31) was used and three image evaluation items were set. The radiographic method, the smallest inclination of the patellar and showed the best half lateral image of the patella, is Settegast, and the measurement is 9.40. The second-best PJR measurement is 9.97, and the difference between the two measures is 5.76% ( p = 0.001 ). The radiographic method showing the image with the largest distance between the patellar and femoral joint space is PJR which a measurement is 12.35. The second best Merchant measure is 10.55, and the difference between the two measures is 14.54% ( p = 0.001 ). The method in which the two bones were well overlapped (i.e., evaluate the distortion of the image by measured as the distance between the femoral trochlear groove and the tibial tuberosity) is the PJR and the measurement is −0.37. The second-best Merchant measure is 3.93, and the difference between the two measures is 91.4% ( p = 0.001 ). The Settegast has the image with the smallest inclination of the patella, but the PJR has the image that best describes the patellar–femoral joint and the least distortion of the image. As a result of the comprehensive evaluation, when using PJR, bending the knee by 40° and setting a 140° angle between the long axis of the femur and the long axis of the lower leg were considered to be the most beneficial conditions. Therefore, we propose the use of PJR for tangential axial radiography of the patellar–femoral joint.

show abstract

Section: Discussionmentioning

confidence: 99%

Development of an Auxiliary Device for Patellar and Femoral Joint Tangential Axial Radiographic Imaging and a Method for Obtaining an Optimal Radiographic Image Using the Development

Rhee

Kim

Kwon

et al. 2022

Applied Bionics and Biomechanics

View full text Add to dashboard Cite

show abstract

“…Most of the existing studies on patellofemoral joint observation determined patellar dislocation and subluxation by measuring the congruence and sulcus angles [15,19,20]. To measure this in the Merchant method, the long axis of the femur must be parallel to the surface of the examination table using an auxiliary device.…”

Section: Discussionmentioning

confidence: 99%

A Study on the Development and Application of Patellofemoral Joint Radiography Auxiliary Device for Tangential Axial Radiography of the Patellar and Patellofemoral Joints

Rhee¹,

Kim²,

Kwon³

et al. 2021

Preprint

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This study evaluated the accuracy of tangential axial radiography of the patellofemoral joints using an auxiliary device, which we named patellofemoral joint radiography (PJR). To compare the PJR and conventional radiography methods such as the Laurin, Merchant, and Settegast, the images taken by three methods were evaluated using a whole body phantom (PBU-31). Settegast was the radiographic method that had the smallest inclination of the patella and showed the best half lateral image of the patella, with a difference of 5.76% when compared with PJR (p = 0.001). PJR was the method that had the largest distance between the patellar and femoral joint spaces, with a difference of 14.54% when compared with the Merchant method (p = 0.001). PJR was the method in which the two bones were well overlapped (i.e., measured by the distance between the femoral trochlear groove and the tibial tuberosity), with a difference of 109.41% when compared with the Merchant method (p = 0.001). The Settegast method has the image with the smallest inclination of the patella, but the PJR has the image that best describes the patellofemoral joint and the least distortion of the image. when using PJR, bending the knee by 40° degree and setting a 140° angle between the long axis of the femur and the long axis of the lower leg were considered to be the most beneficial conditions. We propose the use of PJR for tangential axial radiography of the patellar and patellofemoral joints.

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The Assessment of Tube Incidence Angle for Minimizing the Patellofemoral Joint Overlap Distance in Merchant View

Ye-Weon¹,

Young-Cheol²,

Kim³

et al. 2020

J. Radiol. Sci. Technol.

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Assessment of Congruence Angle according to the Central X-ray in the Merchant View of Patellofemoral Joint

Cited by 4 publications

References 11 publications

Development of an Auxiliary Device for Patellar and Femoral Joint Tangential Axial Radiographic Imaging and a Method for Obtaining an Optimal Radiographic Image Using the Development

Development of an Auxiliary Device for Patellar and Femoral Joint Tangential Axial Radiographic Imaging and a Method for Obtaining an Optimal Radiographic Image Using the Development

A Study on the Development and Application of Patellofemoral Joint Radiography Auxiliary Device for Tangential Axial Radiography of the Patellar and Patellofemoral Joints

The Assessment of Tube Incidence Angle for Minimizing the Patellofemoral Joint Overlap Distance in Merchant View

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