Radiological Effects of Changes in Entry Points on the Medial Longitudinal Arch during Longitudinal Arch Lateral Projections
DOI:
https://doi.org/10.61841/wt4trx07Keywords:
Pes Planus, Pes Cavus, Longitudinal Arch, Center RayAbstract
Background/Objectives: The flatfoot and claw-foot are diagnosed mainly by measuring the degree of cu rvature of the arch of the foot. However, if the incidence point varies, the medial arch curvature in the im age may change. This change can increase the error rate and frequency of retakes, thereby increasing the dose of radiation to the patient. The purpose of this study was to investigate the importance of using the c orrect point of incidence and effect of the point of incidence on the radiologic finding of the medial arch.
Methods/Statistical analysis: The GC-85A radiation generator and phantom foot and ankle were used, and heights of the incidence point were set to the plantar base, metatarsal bone, ankle bone, and ankle jo int. The phantom was located on the front side, and the central X-ray was incident in the outward and in ward directions. Five radiology students obtained a total of 40 images, ten times at each incidence point after pre-training. The statistical program SPSS was used to calculate the average and analyze the sum. I n order to express the width of the mean increase and decrease based on the change in the incidence poi nt, it was calculated by setting the reference point as the foot bone.
Findings:When the incidence point was changed to the plantar base, the angle between the tibia and th e first metatarsal bone changed by 3.4%; the angle between the tibia and the calcaneus pitch changed by 0.55%; the angle between the calcaneus and the first metatarsal bone changed by 0.62%; the height of th e calcaneus changed by 0.5%, the height of the longitudinal joint changed by 3.04%; the cubic bone heig ht decreased by 5.63%; the tongue bone height decreased by 2.97%; and the first medial bone height cha nged by 6.19%.
Improvements/Applications: Upon changing CR to the ankle joint, the talo–first metatarsal angle decre ased by 12.96%, but the calcaneal pitch angle, calcaneo–first metatarsal angle, calcaneal height, calcaneo cuboid joint height, cuboid height, cuneiform height, and first metatarsal height increased by 5.9%, 9.56%, 5.05%, 4.39%, 5.93%, 6.73%, and 16.81%, respectively. This study suggests that the effect of changes in the incidence point on the curvature of the medial arch is important.
Downloads
References
[1] Lee TH, Chay SW, Kim HJ, Diagnosis of Flatfoot Deformity, Journal of Korean Foot & Ankle Society. 2016:20(1): 1-5.
[2] J. W. Suh, W. J Choi, J. W. Lee, Diagnosis and Treatment of Cavus Foot, Journal of Korean Foot and Ankle Society, 2016:20(2):55-61
[3] “Health and medical big data opening systems”, http://opendata.hira.or.kr/op/opc/olap4thDsInfo.do 2019
[4] Kim SB, Ki SY, Park HS, Kwak HH, Nam J, Park JS, Radiologic Measurement of Flatfoot, Journal of the Korean Academy of Rehabilitation Medicine 2000;24(5):995-1001
[5] Shim JH, Jang SH, Lee KH, Park SB, Radiographic Analysis of the Medial Longitudinal Arch of the Foot, Journal of the Korean Academy of Rehabilitation Medicine 2005;29(1):119-121.
[6] Kim EJ, Sang GS, Lee DY. Change of Radiologic Index of Foot, Journal of Korean Foot & Ankle Society. 2015:19(4),165-70
[7] Kim HC, Cho PG, Kim SS, Choi JH, Kim YH, A survey on radiation exposure of patient in mammography, Korean Society of Radiological Science, 2004:27:55-60.
[8] Food and Drug Administration. Guideline for reducing radiation dose of patients. 2011.
[9] Kim NS. Radiological awareness of radiologists engaged in diagnostic radiology
[10] Choi GN, Jeon GS, Kim YW. Radiation Exposure Dose on Persons Engaged in Radiation-related industries, Journal of the Korean Society of Radiology, 2012;6(1): 27-37
Downloads
Published
Issue
Section
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
