Quality improvement of general anteroposterior radiographic image of vertebral body according to optimum angle of incidence

Author:

Kwak Jong Hyeok1,Lee Chi Hyung2,Kim Gyeong Rip2,Lee Sang Weon2,Kim Young Ha2,Song Geun Sung2,Son Dong Wuk2,Sung Hynu Chul3,Kwak Jin Sung4,Sung Soon Ki2

Affiliation:

1. Department of Radiology, Pusan National University Yang-san Hospital, Yang-san, Korea

2. Department of Neurosurgery, Pusan National University Yang-san Hospital, Pusan National University School of Medicine, Yang-san, Korea

3. Department of Radiology, Pusan National University Hospital, Busan, Korea

4. Department of Physics, Changwon National University, Changwon, Korea

Abstract

OBJECTIVE: In this study, we present an appropriate angle of incidence to reduce the distortions in images of L4 and L5 during a general anteroposterior radiograph examination. METHOD: We selected 170 patients who had normal radiological findings among those who underwent anteroposterior and lateral examination for lumbar vertebrae. An optimum angle of incidence wa suggested through the statistical analysis by measuring the lumbar lordosis angle and the intervertebral disc angle in these 170 patients. RESULT: We suggested the incident angle (10.28°) of L4 and the incident angle (23.49°) of L5. We compared the distorted area ratios when the incident angle was 0°, 10°, and 23.5° using the ATOM® phantom. The ratio for the L4 decreased from 14.90% to 12.11% and that of the L5 decreased from 15.25% to 13.72% after applying the angle of incidence. We determined the incident angle (9.34°) of L4 and (21.26°) of L5 below 30° of LLA. Thus, we determined the incident angle (11.21°) of L4 and (25.73°) of L5 above 30° of LLA. CONCLUSION: When you apply the optimum angle of incidence, the distortion of image was minimized and an image between the joints adjacent to the anteroposterior vertebral image with an accurate structure was obtained. As a result, we were able to improve the quality of the image and enhance diagnostic information.

Publisher

IOS Press

Subject

Electrical and Electronic Engineering,Condensed Matter Physics,Radiology Nuclear Medicine and imaging,Instrumentation,Radiation

Reference26 articles.

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4. The lumbar lordosis in acute and chronic low-back pain;Hansson;Spine (Phila Pa 1976),1985

5. Pelvic lordosis and alignment in spondylolisthesis;Jackson;Spine (Phila Pa 1976),2003

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