Browse > Article
http://dx.doi.org/10.17946/JRST.2020.43.3.161

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

Ko, Ye-Weon (Department of Radiology, Samsung Medical Center)
Joo, Young-Cheol (Department of Radiology, Samsung Medical Center)
Kim, Min-suk (Department of Radiology, Samsung Medical Center)
Go, Yu-Rim (Department of Radiology, Samsung Medical Center)
Publication Information
Journal of radiological science and technology / v.43, no.3, 2020 , pp. 161-167 More about this Journal
Abstract
This study aimed to found out the effect of patellofemoral overlap distance by changing femur thickness and center X-ray angles in Merchant method images. Based on the femur thickness, it suggested tube angle minimizes overlap. It was conducted by Merchant method, a knee tangential view, and the image was obtained by changing the thigh thickness from 14 to 20 cm and the center ray angle from 60°, 57°, 55°. The images were measured by five researchers using a method of measuring the overlap, which was designed by them. The results showed at 60°, 57°, 55° angle, the patellofemoral overlap distance resulted in 0.47±0.66 to 20.89±0.65 cm, 2.26±0.28 to 15.73±0.62 cm, 1.39 ± 0.83 to 12.49 ± 0.37 cm. However, for 57° and 55°, no overlap in thickness under 14.5 and 14 to 15.5 didn't appear. it showed high correlation between femur thickness and overlap. The difference in the mean value of overlap in each group showed a statistically significant difference (p<0.01), all were classified as independent groups in the post-hoc test. In all images, the patellofemoral overlap distance increased as the thickness increased, and at the average thickness of Korean men and women, overlap decreased when reducing center ray. When conducting Merchant tests on Koreans, it was suggested it would be useful to use 57° angle because it minimize the effects of overlap and intrusions of tibia.
Keywords
Knee tangential view; Merchant method; Pateollofemoral joint; Femur thickness; Center X-ray angle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 The Korean Orthopedic Association. Orthopedics. 1995;6(2):686-94.
2 DeHaven KE, Dolan WE, Mayer PJ. Chondromalacia patellae in athletes. Clinical presentation and conservative management. Am J Sports Med. 1979;7:5-11.   DOI
3 Hughston JCL. Subluxation of the patella. J Bone Joint Surg. 1968;50A:1003.   DOI
4 Greenspan A. Musculoskeletal orthopedic imaging: A practical approach. Garvey Medicine. 2008;4:243-8.
5 Merchant AC, Mercer RL, Jacobsen RH, Cool CR. Roentgenographic analysis of patellofemoral congruence. J. Bone Joint Surg. 1974;56A;1391.
6 Mc Alindon T, Cooper C, Kirwan J, Dippe P. Determinanats of disability in osteoarthritis of the knee. Annals of the Rheumatic Diseases. 1993;52(4):258-62.   DOI
7 Settegast. Typische roentgenbilder von normalen menschen. Lehmans Med Atlanten. 1921;5:211-23.
8 Ficat RP, Hungerford DS. Disorder of the patellofemoral joint. Williams & Wilkins, Baltimore; 1977.
9 Seo SY, Han MS, Jeon MC, Yu SJ, Kim YK. The evaluation of usefulness new assistant device to observe posterior cruciate ligament rupture and patellofemoral joint injury in emergency patient. Journal of Radiological Science and Technology. 2010;33(2):93-6.
10 Keats TE, Sistrom C. Atlas of radiologic measurement. Atlas of Radiologic Measurement: Lower Extermity. 2001:268-71.
11 Size Korea. South Korea Human Body Index. https://sizekorea.kr (November.9th.2019)
12 Martinew S, Korobkin M, Fondren FB, Hedlund LW, Goldner JL. Diagnosis of patellofemoral malalignment by computed tomography. J Comput Assist Tomogr. 1983;7:1050-3.   DOI
13 Dupuy DE, Hangen DH, Zachazewski JE, Boland AL, Palmer W. Kinematic CT of the patellofemoral joint. AJR Am J Roentgenol. 1997;169:211-5.   DOI
14 Shellok FG, Mink JH, Deutsch AL, Fox JM. Patellar tracking abnormalitites: Clinical experience with kinematic MR imaging in 130 patients. Radiology. 1989;172;799-804.   DOI
15 Aglietti P, Insall JN, Cerulli G. Patellar pain and incongruence. I: Measurements of incongruence. Clinical Orthopaedics and Related Research. 1983;176:217-24.
16 Brossmann J, Muhle C, Schroder C, et al. Patellar tracking patterns during active and passive knee extension: Evaluation with motion-triggered cine MR imaging. Radiology. 1993;187;205-12.   DOI
17 Chung YK, Lee KB, Young WK. A clinical study of traumatic dislocation of the knee joint: Analysis of 7 cases. Journal of the Korean Orthopaedic Association. 1986;21(4):703-8.   DOI
18 Kim HJ, Joo YC, Choi JH, Lim WT. Assessment of congruence angle according to the central X-ray in the merchant view of patellofemoral joint. Journal of Radiological Science and Technology. 2019;42(6):423-8.   DOI