Browse > Article
http://dx.doi.org/10.7742/jksr.2021.15.6.919

A Study on the Optimal Angle as Modified Tangential Projection of Knee Bones  

Oh, Wang-Kyun (Department of Radiology, Cheongju Medical Center)
Kim, Sang-Hyun (Department of Radiological Science, Shinhan University)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.6, 2021 , pp. 919-926 More about this Journal
Abstract
In this study, we wanted to find out the optimal angle as a modified tangential projection of the patella. In the experiment, we used Kyoto Kagaku's PBU-50 phantom. In the supine position, the F-T angle was set to 95°, 105°, 115°, 125°, 135°, 145°, and Patella tangential projection images were obtained by varying the X-ray tube angle by 5° so that the angle between the X-ray centerline and tibia at each angle was 5~20°. Image J was used for image analysis and the congruence angle, lateral patellofemoral angle, patellofemoral index and contrast to noise ratio(CNR) were also measured. SPSS 22 was used for statistical analysis, and the mean values of congruence angle, patellofemoral angle, patellofemoral index, and CNR were compared with Merchant method through one-way batch analysis and corresponding sample t-test. As a result of the study, in the case of congruence angle, the angle of incidence of the knee-angle X-ray centerline was 105°-72.5° (20° tangential irradiation), 115°-72.5°, 77.5° (15, 20° tangential irradiation), 125°-82.5° (20° tangential irradiation), lateral patellofemoral angle is 115°-72.5°, 77.5° (15, 20° tangential irradiation), 125°-72.5° (10° tangential irradiation), patellofemoral index is 115°-72.5° (15° tangential irradiation) and 125°-72.5° (10° tangential irradiation) were not significantly different from Merchant method (p> .05). In case of CNR, it is not different from Merchant method at 105°-67.5°, 72.5° (15, 20° tangential irradiation), 115°-67.5°, 72.5°, 77.5° (10, 15, 20° tangential irradiation). (P> .05). Based on the results of this study, high diagnostic value images can be obtained by setting the knee angle and the angle of incidence of the X-ray tube to 115°-72.5° (15° tangential irradiation) during the modified tangential examination of the knee bone. It was confirmed.
Keywords
Patella; Merchant; tangential view; Congruence angle; Lateral patellofemoral angle; Patellofemoral index;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. W. Lee, J. M. Kim, J. H. Park, H. C. Shon, D. J. Youn, S. I. Bin, "A Radiological Analysis of the Patients with Patellofemoral Pain Syndrome", Journal of Korean Orthopaedic Association, Vol. 36, No. 3, pp. 227-231, 2001. http://dx.doi.org/10.4055/jkoa.2001.36.3.227   DOI
2 S. Y. Seo, M. S. Han, M. C. Jeon, S. J. Yu, Y. K. Kim, "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, Vol. 33, No. 2, pp. 93-96, 2010.
3 T. E. Keats, C. Sistrom, Atlas of radiologic measurement, 7nd Ed., Elsevier Health Sciences Publishing Co., London, United Kingdom, pp. 267-271, 2001.
4 J. Brossmann, C. Muhle, C. Schroder, U. H. Melchert, C. C. Bull, R. P. Spielmann, M. Heller, "Patellar tracking patterns during active and passive knee extension: Evaluation with motion-triggered cine MR imaging", Radiology, Vol. 187, No. 1, pp. 205-212, 1993. http://dx.doi.org/10.1148/radiology.187.1.8451415   DOI
5 S. H. Lee, B. K. Lee, S. W. Yoon, Y. J. Kim, "The Comparison of Sulcus Angle and Congruence Angle in the Patient with and without the Patella Pain Syndrome", Journal of the Korean Orthopaedic Association, Vol. 23, No. 4, pp. 991-996, 1988. http://dx.doi.org/10.4055/jkoa.1988.23.4.991   DOI
6 S. H. Son, S. K. Kim, "The evaluation of usefulness new assistant device to increase patient convenience and processes efficiency of radiographic procedures for merchant view", The Korean Society for Digital Imaging in Medicine, Vol. 12, No. 1, pp. 43-50, 2010.
7 Y. H. Seoung, "Usefulness Evaluation of Merchant Auxiliary Equipment of Body Type Changing Suitable for X-ray Table Integral Type", Journal of the Korea Academia-Industrial cooperation Society, Vol. 14, No. 6, pp. 2773-2779, 2013. http://dx.doi.org/10.5762/KAIS.2013.14.6.2773   DOI
8 H. J Kim, Y. C. Joo, J. H Choi, W. T Lim, "Assessment of Congruence Angle according to the Central X-ray in the Merchant View of Patellofemoral Joint", Journal of Radiological Science and Technology, Vol. 42, No. 6, pp. 423-428, 2019. http://dx.doi.org/10.17946/JRST.2019.42.6.423   DOI
9 H. S. Kyun, J. K. Hwang, "Diagbostic approach of patello-femoral instability", Journal of Korean Orthopedic Sports Medicine, Vol. 7, No. 2, pp. 84-94, 2008.
10 N. H. Choi, J. H. Lee, "Evaluation of patellofemoral joint disorder", Journal of Korean Orthopedic Sports Medicine, Vol. 5, No. 1, pp. 17-21, 2006.
11 E. K. Song, H. S. Kim, M. J. Kim, D. H. Ryang, "Analysis of Kinematic Patellar Motions in Normal Korean by Computerized Tomography", Journal of the Korean Orthopaedic Association, Vol. 27, No. 4, pp. 1147-1157, 1992. http://dx.doi.org/10.4055/jkoa.1992.27.4.1147   DOI
12 Y. W Ko, Y. C. Joo, M. S. Kim, Y. R. Go, "The Assessment of Tube Incidence Angle for Minimizing the Patellofemoral Joint Overlap Distance in Merchant View", Journal of Radiological Science and Technology, Vol. 43, No. 3, pp. 161-167, 2020. https://doi.org/10.17946/JRST.2020.43.3.161   DOI
13 https://en.m.wikipedia.org/wiki/Contrast-to-noise_ratio.
14 A. C. Merchant, "Patellofemoral Imaging", Clinical Orthopeadic and Related Research, Vol. 389, No. 389, pp. 15-21, 2001. http://dx.doi.org/10.1097/00003086-200108000-00004   DOI
15 H. S. Kyung, B. W. Lee, W. J. Jeong, "Evaluation of Anterior Knee Pain", Knee Surgery and Related Research, Vol. 21, No. 3, pp. 127-141, 2009.