Data From RIDER PHANTOM PET-CT

The RIDER Phantom PET-CT collection consists of repeat measurement PET/CT phantom scan collections carried out under the aegis of the Society of Nuclear Medicine (SNM) to discern the uniformity of clinical imaging instrumentation at various sites. They were obtained in cooperation with SNM as a resource for increased quantitative understanding of machine acquisition, analytic reproducibility and image processing. The phantom was manufactured by Sanders Medical(www.sandersmedical.com) in December of 2006. The phantom was based on a NEMA NU-2 IQ phantom (manufactured by Data Spectrum, Durham NC), but with the central 5 cm diameter 'lung' cylinder of the IQ phantom removed. In addition the two larger fillable spheres were changed to hot spheres, as opposed to cold spheres as in the NEMA NU-2 specifications. Nominal target/background ratio was 4:1 with the initial background activity level set to be equivalent to 15 mCi in a 70 Kg patient, With the 271 day half-life of Ge-68 after 6 months the activity will be about 9.5 mCi. After a year it was 6 mCi.

RIDER体模PET-CT数据集（RIDER Phantom PET-CT collection）为核医学学会（Society of Nuclear Medicine, SNM）牵头开展的重复测量PET/CT体模扫描合集，旨在探明不同临床位点的成像设备一致性。本数据集由SNM合作产出，旨在为深化对设备采集流程、分析重现性及图像处理技术的量化认知提供支撑资源。该体模由Sanders Medical（官网：www.sandersmedical.com）于2006年12月制造，其原型为NEMA NU-2 IQ体模（由位于美国北卡罗来纳州达勒姆市的Data Spectrum公司制造），但移除了IQ体模中央直径5厘米的“肺部”圆柱腔体。此外，原NEMA NU-2标准中的两个较大可填充球体被修改为热球体（hot spheres），而非冷球体。该数据集的标称靶/本底比值为4:1，初始本底活度设置为相当于70公斤体重患者体内15毫居里（mCi）的活度。由于锗-68（Ge-68）的半衰期为271天，6个月后活度约为9.5毫居里，1年后活度降至6毫居里。