팬텀을 이용한 소아 PET/CT 검사 시 감쇄보정 CT 선량과 영상 평가

• 영문명: Evaluation of Dosimetry and Image of Very Low Dose CT Attenuation Correction for Pediatric PET/CT: Phantom Study
• 발행기관: 대한핵의학기술학회
• 저자명: 반영각(Young Kag Bahn) 김정열(Jung Yul Kim) 박훈희(Hoon-Hee Park) 강천구(Chun Goo Kang) 임한상(Han Sang Lim) 이창호(Chang Ho Lee)
• 간행물 정보: 『핵의학기술』Vol.15 No.2, 53~59쪽, 전체 7쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2011.11.30

영문 초록

Purpose: To evaluate the dosimetry and image of very low does CT attenuation correction for phantom using pediatric PET/CT. Materials and methods: three PET / CT scanners (Discovery STe, BiographTruepoint 40, Discovery 600) as a child-size acrylic phantom and ion chamber dosimeter (Unfous Xi CT, Sweden) using a CT image acquisition parameters (10, 20, 40, 80, 100, 160 mA; 80, 100, 120, 140 kVp) by varying the depth dose and evaluate CTDᵥ₀₁ value. And each attenuation corrected PET/CT images used NEMA PET Phantom™ (NU2-1994) was evaluated by SUV. Results: Abdominal diagnosis CT dose in general pediatric (about 10 ages) parameter (100 kVp, 100 mA) than very low dose CT parameter (80 kVp, 10 mA) at the depth dose was reduced approximately 92%, CTDIᵥ₀₁ was reduced to about 88%. Each CT attenuation corrected parameters PET images showed no change in the value of SUV. Conclusion: for pediatric patients, PET/CT scan can be obtained with very low dose attenuation correction CT (80 kVp, 10 mA), and such attenuation correction CT dose was reduced 100 fold than diagnosis CT dose. PET / CT scan used very low dose CT attenuation correction in pediatric patients can be helpful in reducing radiation dose.

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실험재료 및 방법

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REFERENCES

키워드

PET / CT Pediatric Phantom Dose