摘要
目的比较符合线路显像标准摄取值(SUV)与PET显像的SUV。方法用双探头符合显像仪及PET对模型显像,分别采用不同的重建算法重建,测定图像上热灶的SUV。结果对直径小于30mm热灶,相同大小时,PET得到的SUV高于符合线路显像;无论对PET还是符合线路显像,随热灶大小增加SUV增加;SUV与重建算法有关;选取的感兴趣区(ROI)越大,获得的SUV越小;由PET图像获得的热灶SUV可见,当热灶大于2倍的系统分辨率时,SUVmax接近热灶的真实值(SUVtrue)。结论符合线路显像的SUV低于PET显像;病灶大小、重建算法、ROI大小均影响SUV。
Objective To compare dual-head coincidence imaging standard uptake value (SUV) with PET imaging SUV. Methods The scans were performed with dual-head coincidence imaging equipment and PET on a phantom which consisted of some hot lesions. The images were reconstructed with different algorithms. The hot lesions' SUVs were measured. Results For the same hot lesions, the SUV from PET images was larger than that from the dual-head coincidence images. For both the PET image and dual-head coincidence image, the SUV increased with the size of the lesions. The SUV was related with reconstruction algorithm. The larger the region of interest (ROI), the smaller the SUV of a lesion. The SUV from PET images showed the maximum SUV and was nearly coming to the true SUV value of the hot lesions 2 times larger than that of system resolution. Conclusion The SUV in dual-head coincidence imaging is lower than that in PET imaging; and the lesion size, reconstruction algorithm, and the size of ROI can influence the SUV.
出处
《中华核医学杂志》
CAS
CSCD
北大核心
2004年第5期308-309,共2页
Chinese Journal of Nuclear Medicine
关键词
符合线路显像
PET显像
SUV
比较研究
Tomography, emission-computed, single-photon
Tomography, emission-computed
Standard uptake value
