The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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Application of Incidence Angle on Lumbar Spine Anteroposterior General Radiography Image according to Measured Intervertebral Disc Angle

방사선 일반 정면검사에서 허리뼈 추간판 계측 값에 따른 입사각 적용

  • 문슬지아 (전남대학교병원 영상의학과) ;
  • 김경립 (양산부산대학교병원 감마나이프센터) ;
  • 조희정 (부산과학기술대학교 의무행정과) ;
  • 성순기 (양산부산대학교병원 감마나이프센터) ;
  • 곽종혁 (양산부산대학교병원 영상의학과)
  • Received : 2019.04.01
  • Accepted : 2019.04.24
  • Published : 2019.06.28
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Abstract

L-spine 3~4, L-spine 4~5, and L-spine 5~Sacrum 1 intervertebral disc(IVD) angle according to gender, age, body mass index(BMI), lumbar lordosis angle(LLA) were compared and analyzed. The anteriorposterior incidence angle of L-spine 3 ~ 4, L-spine 4 ~ 5 and L-spine 5~Sacrum 1 in body mass index were 5.66, 13.23 and 29.13 degrees in the head direction and L-spine 3 4, L-spine 4 ~ 5, L-spine 5~Sacrum 1 had 6.32 degrees, 16.09 degrees and 35.36 degrees in the head direction. The distortion area ratio comparison was performed with the phantom image using the proposed incidence angle. There was a significant difference in L-spine 4~5 and L-spine 5~Sacrum 1 IVD angle relative to body mass index and LLA(p<0.05), IVD angle and LLA were positively correlated(p<0.05).As a result of evaluating the usefulness of the image by applying the incidence angles of the disc angles according to the phantom angle of deviation to the head direction as 11 degrees for L4 and 26 degrees for L5, the distortion ratio area decreased from 14.90% to 12.11% in L4, And from 15.25% to 13.72% in L5. In anteriorposterior image of the Lumbar spine applying the incidence angle according to the measured disc angle, it is possible to reduce the distortion to purpose L4, L5. And improved the quality and diagnostic information of the target site.

정상인을 대상으로 체질량지수, 전만각도에 따른 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 각각의 추간판각도를 비교 분석하여 입사각을 제시하였다. 체질량지수의 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 정면 입사각도는 머리 쪽 방향으로 5.66도, 13.23도, 29.13도였으며, 전만각도의 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 정면 입사각도는 머리 쪽 방향으로 6.32도, 16.09도, 35.36도였다. 체질량지수, 전만각도에 따른 정면 입사각도에 따라 적용한 팬텀의 일반 전후방향 영상의 왜곡정도를 면적비율로 비교한 결과 L-spine 4~5, L-spine 5~Sacrum 1의 추간판각도에서 유의미한 차이가 있었고(p<0.05), 전만각도와 추간판각도는 양의 상관관계를 보였다(p<0.05). 팬텀의 전만각도에 따른 추간판각도 계측 값을 머리 쪽 방향으로 입사각을 L4는 11도, L5는 26도로 적용하여 영상의 유용성을 평가한 결과, 왜곡비율면적은 L4에서 14.90%에서 12.11%로 줄어들었고, L5에서는 15.25%에서 13.72%로 줄어들었다. 계측된 추간판 각도에 따른 입사각을 적용한 허리뼈 일반 전후방향 영상에서 허리뼈 4번, 5번을 목적으로 하는 허리뼈 정면 영상에서 왜곡을 줄여, 정확한 구조의 정면 추체상과 인접하는 관절 간 영상을 얻을 수 있었고, 목적하는 부위의 영상의 질과 진단적 정보를 향상시킬 수 있었다.

Keywords

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그림 1. ATOM® phantom and Philips diagnosis X-ray equipment

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그림 2. Measurement of lumbar vertebral lordosis angle and disc angle

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그림 3. Measure the area of distortion using the ROI free draw tool of the PACS program (marosis, marotech)

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그림 5. L4, L5 ap X-ray applied to incidence angle

Table 1. Comparison of IVD angle according to Characteristics

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Table 2. Correlation between IVD angle and BMI, LLA

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Table 4. Comparison of distortion area according to incidence angle on L4 and L5

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Table 3. Incidence angle on lumbar spine anteroposterior general radiography according to LLA

CCTHCV_2019_v19n6_471_t0004.png 이미지

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