지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
An MR-based attenuation correction (MRAC) map plays an important role in quantitative positron emission tomography (PET) image evaluation in PET/magnetic resonance imaging (MRI) systems. However, the MRAC map is affected by the magnetic field inhomogeneity of MRIs. This study aims to evaluate the characteristics of MRAC maps of physical phantoms on PET/MRI images. Phantom measurements were performed using the Siemens Biograph mMR. The modular type physical phantoms that provide assembly versatility for phantom construction were scanned in a fourchannel Body Matrix coil. The MRAC map was generated using the two-point Dixon-based segmentation method for whole-body imaging. The modular phantoms were scanned in compact and non-compact assembly configurations. In addition, the phantoms were scanned repeatedly to generate MRAC maps. The acquired MRAC maps show differently assigned values for void areas. An incorrect assignment of a void area was shown on a locally compact space between phantoms. The assigned MRAC values were distorted using a wide field-of-view (FOV). The MRAC values also differed after repeated scans. However, the erroneous MRAC values appeared outside of phantom, except for a large FOV. The MRAC map of the phantom was affected by phantom configuration and the number of scans. A quantitative study using a phantom in a PET/MRI system should be performed after evaluation of the MRAC map characteristics.
목차
등록된 정보가 없습니다.
참고문헌 (16)
참고문헌 신청
Bushberg JT / 2011 / The essential physics of medical imaging / Lippincott Williams & Wilkins
Kinahan PE / 1998 / Attenuation correction for a combined 3D PET/CT scanner / Med Phys 25:2046~2053
Hofmann M / 2008 / MRI-based attenuation correction for PET/MRI : a novel approach combining pattern recognition and atlas registration / J Nucl Med 49:1875~1883
Judenhofer MS / 2008 / Simultaneous PET-MRI : a new approach for functional and morphological imaging / Nat Med 14:459~465
Hofmann M / 2009 / Towards quantitative PET/MRI : a review of MR-based attenuation correction techniques / Eur J Nucl Med Mol Imaging 36(Suppl 1):S93~S104
Kinahan PE / 1998 / Attenuation correction for a combined 3D PET/CT scanner / Med Phys 25:2046~2053
Hofmann M / 2008 / MRI-based attenuation correction for PET/MRI : a novel approach combining pattern recognition and atlas registration / J Nucl Med 49:1875~1883
Judenhofer MS / 2008 / Simultaneous PET-MRI : a new approach for functional and morphological imaging / Nat Med 14:459~465
Hofmann M / 2009 / Towards quantitative PET/MRI : a review of MR-based attenuation correction techniques / Eur J Nucl Med Mol Imaging 36(Suppl 1):S93~S104
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