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The Significance of Maturation Score of Brain Magnetic Resonance Imaging in Extremely Low Birth Weight Infant

초극소 저체중 출생아의 뇌 MRI 상 Maturation Score의 의의

  • Song, In-Gu (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Su-Yeong (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Cur-Rie (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Yoon-Joo (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Shin, Seung-Han (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Lee, Seung-Hyun (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Lee, Jae-Myoung (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Lee, Ju-Young (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Ji-Young (Department of Radiology, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Sohn, Jin-A (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Lee, Jin-A (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Choi, Chang-Won (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Ee-Kyung (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Cheon, Jung-Eun (Department of Radiology, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Woo-Sun (Department of Radiology, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Han-Suk (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, Byeong-II (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Kim, In-One (Department of Radiology, Seoul National University College of Medicine and Institute of Radiation Medicine) ;
  • Choi, Jung-Hwan (Department of Pediatrics, Seoul National University College of Medicine and Institute of Radiation Medicine)
  • 송인규 (서울대학교 의과대학 소아과학교실) ;
  • 김수영 (서울대학교 의과대학 소아과학교실) ;
  • 김규리 (서울대학교 의과대학 소아과학교실) ;
  • 김윤주 (서울대학교 의과대학 소아과학교실) ;
  • 신승한 (서울대학교 의과대학 소아과학교실) ;
  • 이승현 (서울대학교 의과대학 소아과학교실) ;
  • 이재명 (서울대학교 의과대학 소아과학교실) ;
  • 이주영 (서울대학교 의과대학 소아과학교실) ;
  • 김지영 (서울대학교 의과대학 영상의학교실) ;
  • 손진아 (서울대학교 의과대학 소아과학교실) ;
  • 이진아 (서울대학교 의과대학 소아과학교실) ;
  • 최창원 (서울대학교 의과대학 소아과학교실) ;
  • 김이경 (서울대학교 의과대학 소아과학교실) ;
  • 천정은 (서울대학교 의과대학 영상의학교실) ;
  • 김우선 (서울대학교 의과대학 영상의학교실) ;
  • 김한석 (서울대학교 의과대학 소아과학교실) ;
  • 김병일 (서울대학교 의과대학 소아과학교실) ;
  • 김인원 (서울대학교 의과대학 영상의학교실) ;
  • 최중환 (서울대학교 의과대학 소아과학교실)
  • Published : 2011.11.30

Abstract

Purpose: The aim of this study was to investigate the effect of perinatal risk factors on brain maturation and the relationship of brain maturation and neurodevelopmental outcomes with brain maturation scoring system in brain MRI. Methods: ELBWI infants born at the Seoul National University Children's Hospital from January 2006 to December 2010 were included. A retrospective analysis was performed with their medical record and brain MR images acquired at near full term. We read brain MRI and measured maturity with total maturation score (TMS). TMS is a previously developed anatomic scoring system to assess brain maturity. The total maturation score was used to evaluate the four parameters of maturity: (1) myelination, (2) cortical infolding, (3) involution of glial cell migration bands, and (4) presence of germinal matrix tissue. Results: Images from 124 infants were evaluated. Their mean gestational age at birth was 27.1${\pm}$2.1 weeks, and mean birth weight was 781.5${\pm}$143.9 g. The mean TMS was 10.8${\pm}$2.0. TMS was significantly related to the postmenstrual age (PMA) of the infant, increasing with advancing postmenstrual age (P<0.001). TMS showed no significance with neurodevelopmental delay, and with brain injury, respectively. Conclusion: TMS was developed for evaluating brain maturation in conventional brain MRI. The results of this study suggest that TMS was not useful for predicting neurodevelopmental delay, but further studies are needed to make standard score for each PMA and to re-evaluate the relationship between brain maturation and neurodevelopmental delay.

목적: ELBWI의 출생과 생존율이 증가함에 따라 그들의 삶의 질의 향상을 위해 신경학적 발달을 예측 및 평가하고 재활 치료를 통해 발달 지연을 최소화하기 위한 많은 연구가 이루어지고 있다. 뇌 손상의 평가 및 신경학적 발달을 예측하기 위하여 뇌 MRI의 촬영이 많이 이루어지고 있고, 연구를 통해 다양한 프로토콜이 개발되고 있다. 저자들은 Childs 등이 제안한 뇌 성숙도를 점수화 하는 방법을 통해 ELBWI의 주산기에 발생하는 위험 인자와 뇌성숙의 관계, 뇌 성숙과 신경학적 발달 지연과의 관계에 대해 확인하고자 한다. 방법: 교정 주령 만삭 근처에 뇌 MRI를 시행한 ELBWI 124명을 대상으로 의무 기록을 후항적으로 분석하여 주산기적 위험인자를 확인하였고, 뇌 MRI에서 뇌 성숙도를 점수화(TMS) 하고, 동반 되는 이상 소견을 판독하였으며, BSID III를 시행하여 신경학적 발달에 대한 평가를 하였다. 주산기적 위험인자와 TMS의 관계, 뇌 MRI에서 관찰 되는 이상 소견과 TMS의 관계, TMS와 BSID III 결과의 관계에 대한 분석을 하였다. 결과: 대상 환자의 평균 출생 재태 주령은 27.1${\pm}$2.1주, 평균 출생 체중은 781.5${\pm}$143.9 g 이었다. 뇌 성숙도 점수의 평균은 10.8${\pm}$2.0점이었다. 주산기적 위험 인자와의 관계 분석에서는 MRI 검사 당일의 PMA만이 통계학적으로 유의한 관계를 보였고 (P<0.001), BSID III에서 확인되는 신경학적 발달 지연이나 뇌 MRI에서 이상 소견과 뇌 성숙도 점수 간에는 통계학적으로 유의한 상관관계가 없었다. 결론: Conventional 뇌 MRI에서 뇌 성숙도를 평가하여 신경학적 발달을 예측하고, 뇌 성숙에 영향을 주는 주산기적 위험인자를 찾고자 하였으나 MRI 검사 당일의 PMA 외에는 통계학적으로 의미 있는 결과가 없었다. 하지만 수초화 등의 뇌 성숙의 정도가 신경학적 발달에 영향을 줄 것으로 추측되므로 향후 더 다양한 교정 주수에 촬영된 영상과 여러 임상 환자군의 영상에 대한 분석 및 BSID III 등 신경학적 발달 검사와의 관계에 대한 연구가 필요하다.

Keywords

References

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