Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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An effectiveness of multitransmit parallel technique on scan time reduction in hip joint MRI

고관절 자기공명영상 검사 시 multitransmit 기법의 적용에 따른 검사시간 단축의 유용성

  • Choi, Kwan-Woo (Department of Radiology, Asan Medical Center) ;
  • Son, Soon-Yong (Department of Radiotechnology, Wonkwang Health Science University)
  • 최관우 (서울아산병원 영상의학과) ;
  • 손순룡 (원광보건대학교 방사선과)
  • Received : 2015.10.16
  • Accepted : 2016.03.03
  • Published : 2016.03.31
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Abstract

This study examined the effectiveness of the multitransmit parallel technique on the MRI scan time reduction by removing the dielectric effect. The T1 and T2 weighted images of the patients' hip joint were acquired with and without a multitransmit technique. The ROIs were located in the head of femur and iliopsoas muscle. The SNR, CNR and scan time were measured and compared. There was no difference in the images with and without multitransmit. In contrast, the acquisition time was decreased by 42.8% in T1WI and 49.7% in T2WI. In conclusion, this study demonstrated that significant scan time reductions can be accomplished without any differences in the image quality in hip joint MRI by applying the multitransmit parallel technique. Furthermore, the multitranstmit technique is useful in other body parts to resolve the long scan time of an MRI examination.

본 연구의 목적은 MRI 검사 시 multitransmit 기법의 적용으로 인한 검사시간 단축의 유용성을 알아보고자 하였다. 연구방법은 2015년 7월부터 동년 9월까지 고관절 MRI 검사를 시행한 환자를 대상으로 multitransmit 기법 적용 전-후 고관절의 T1, T2 강조영상을 획득하여 대퇴골두와 장요근의 SNR과 CNR, 그에 따른 검사시간을 비교 평가하였다. 연구결과, multitransmit 기법 적용 전-후 T1, T2 강조영상 모두 SNR과 CNR은 유의한 차이가 없었으며, 검사시간은 적용 전에 비해 T1 강조영상은 42.8%, T2 강조영상은 49.7%로 감소하였다. 결론적으로 MRI 검사 시 본 연구와 같이 multitransmit 기법을 적용하면, 기존의 검사시간 단축관련 연구들에서 문제가 되었던 영상의 질 저하 없이 검사시간을 획기적으로 줄일 수 있으며, 향후 다양한 검사에 multitransmit 기법을 적용한다면 MRI 검사의 고질적 문제인 검사시간을 단축할 수 있어 매우 유용하리라 사료된다.

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