Resolution Recovery 기반의 Astonish 영상 재구성 기법의 평가

• 영문명: The Evaluation of Resolution Recovery Based Reconstruction Method, Astonish
• 발행기관: 대한핵의학기술학회
• 저자명: 승종민(Jong Min Seung) 이형진(Hyeong Jin Lee) 김진의(Jin Eui Kim) 김현주(Hyun Joo Kim) 김중현(Joong Hyun Kim) 이재성(Jae Sung Lee) 이동수(Dong Soo Lee)
• 간행물 정보: 『핵의학기술』Vol.15 No.1, 58~64쪽, 전체 7쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2011.04.30

영문 초록

Objective: The 3-dimensional reconstruction method with resolution recovery modeling has advantages of high spatial resolution and contrast because of its precise modeling of spatial blurring according to the distance from detector plane. The aim of this study was to evaluate one of the resolution recovery reconstruction methods (Astonish, Philips Medical), compare it to other iterative reconstructions, and verify its clinical usefulness. Materials and Methods: NEMA IEC PET body phantom and Flanges Jaszczak ECT phantom (Data Spectrum Corp., USA) studies were performed using Skylight SPECT (Philips) system under four different conditions; short or long (2 times of short) radius, and half or full (40 kcts/frame) acquisition counts. Astonish reconstruction method was compared with two other iterative reconstructions; MLEM and 3D-OSEM which vendor supplied. For quantitative analysis, the contrast ratios obtained from IEC phantom test were compared. Reconstruction parameters were determined by optimization study using graph of contrast ratio versus background variability. The qualitative comparison was performed with Jaszczak ECT phantom and human myocardial data. Results: The overall contrast ratio was higher with Astonish than the others. For the largest hot sphere of 37 mm diameter, Astonish showed about 27.1% and 17.4% higher contrast ratio than MLEM and 3D-OSEM, in short radius study. For long radius, Astonish showed about 40.5% and 32.6% higher contrast ratio than MLEM and 3D-OSEM. The effect of acquired counts was insignificant. In the qualitative studies with Jaszczak phantom and human myocardial data, Astonish showed the best image quality. Conclusion: In this study, we have found out that Astonish can provide more reliable clinical results by better image quality compared to other iterative reconstruction methods. Although further clinical studies are required, Astonish would be used in clinics with confidence for enhancement of images.

목차

서론

실험재료 및 방법

결과

결론 및 고찰

요약

REFERENCES

키워드

Resolution recovery MLEM 3D-OSEM Astonish