Patient-specific optimisation of administered activity and acquisition times for ¹⁸F-FDG PET imaging

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• 作者：Fred Wickham ; Helena McMeekin ; Maria Burniston ; Daniel McCool…
• 关键词：Positron emission tomography ; Administered activity ; Acquisition time ; Optimisation ; Image quality ; Noise equivalent counts
• 刊名：EJNMMI Research
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：7
• 期：1
• 全文大小：1231KB
• 刊物主题：Nuclear Medicine; Imaging / Radiology; Orthopedics; Cardiology; Oncology;
• 出版者：Springer Berlin Heidelberg
• ISSN：2191-219X
• 卷排序：7

文摘

BackgroundThe purpose of this study is to identify a method for optimising the administered activity and acquisition time for 18F-FDG PET imaging, yielding images of consistent quality for patients with varying body sizes and compositions, while limiting radiation doses to patients and staff. Patients referred for FDG scans had bioimpedance measurements. They were injected with 3 MBq/kg of 18F up to 370 MBq and scanned on a Siemens Biograph mCT at 3 or 4 min per bed position. Data were rebinned to simulate 2- and 1-min acquisitions. Subjective assessments of image quality made by an experienced physician were compared with objective measurements based on signal-to-noise ratio and noise equivalent counts (NEC). A target objective measure of image quality was identified. The activity and acquisition time required to achieve this were calculated for each subject. Multiple regression analysis was used to identify expressions for the activity and acquisition time required in terms of easily measurable patient characteristics.