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Journal of the Korean Physical Society

, Volume 62, Issue 5, pp 826–833 | Cite as

A comparative quantitative analysis of the IDEAL (iterative decomposition of water and fat with echo asymmetry and least-squares estimation) and the CHESS (chemical shift selection suppression) techniques in 3.0 T L-spine MRI

  • Eng-Chan Kim
  • Jae-Hwan Cho
  • Min-Hye Kim
  • Ki-Hong Kim
  • Cheon-Woong Choi
  • Jong-min Seok
  • Kil-Ju Na
  • Man-Seok Han
Article
  • 86 Downloads

Abstract

This study was conducted on 20 patients who had undergone pedicle screw fixation between March and December 2010 to quantitatively compare a conventional fat suppression technique, CHESS (chemical shift selection suppression), and a new technique, IDEAL (iterative decomposition of water and fat with echo asymmetry and least squares estimation). The general efficacy and usefulness of the IDEAL technique was also evaluated. Fat-suppressed transverse-relaxation-weighed images and longitudinal-relaxation-weighted images were obtained before and after contrast injection by using these two techniques with a 1.5T MR (magnetic resonance) scanner. The obtained images were analyzed for image distortion, susceptibility artifacts and homogenous fat removal in the target region. The results showed that the image distortion due to the susceptibility artifacts caused by implanted metal was lower in the images obtained using the IDEAL technique compared to those obtained using the CHESS technique. The results of a qualitative analysis also showed that compared to the CHESS technique, fewer susceptibility artifacts and more homogenous fat removal were found in the images obtained using the IDEAL technique in a comparative image evaluation of the axial plane images before and after contrast injection. In summary, compared to the CHESS technique, the IDEAL technique showed a lower occurrence of susceptibility artifacts caused by metal and lower image distortion. In addition, more homogenous fat removal was shown in the IDEAL technique.

Keywords

Pedicle screw fixation CHESS technique IDEAL technique Fat suppression 

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Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  • Eng-Chan Kim
    • 1
  • Jae-Hwan Cho
    • 2
  • Min-Hye Kim
    • 3
  • Ki-Hong Kim
    • 4
  • Cheon-Woong Choi
    • 5
  • Jong-min Seok
    • 6
  • Kil-Ju Na
    • 7
  • Man-Seok Han
    • 8
  1. 1.Department of PhysicsYeungnam UniversityGyeongsanKorea
  2. 2.Department of International Radiological ScienceHallym University of Graduate StudiesSeoulKorea
  3. 3.Department of Radiological ScienceCatholic University of DaeguGyeongsanKorea
  4. 4.Department of Radiological TechnologyChoonHae College of Health SciencesUlsanKorea
  5. 5.Department of Respiratory and Critical Care MedicineKyunghee University Hospital at GangdongSeoulKorea
  6. 6.Department of RadiologyNational Police HospitalSeoulKorea
  7. 7.Department of Radiological TechnologyMokpo Science CollegeMokpoKorea
  8. 8.Department of Radiological ScienceKangwon National UniversitySamchukKorea

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