Journal of Capital Medical University ›› 2022, Vol. 43 ›› Issue (6): 854-860.doi: 10.3969/j.issn.1006-7795.2022.06.006

• Nuclear Medicine and Molecular Imaging Assists Clinical Diagnosis and Treatment • Previous Articles     Next Articles

Comparison of continuous-bed-motion and step-and-shoot acquisition modes on 18F-FDG PET/CT imaging

Yang Sen, Wang Ling, Liu Peng, Jin Chaoling, Li Honglei, Fu Liping*   

  1. Department of Nuclear Medicine, China-Japan Friendship Hospital, Beijing 100029, China
  • Received:2022-09-30 Online:2022-12-21 Published:2022-11-30
  • Contact: *E-mail:flp39@163.com

Abstract: Objective To investigate the effects of continuous-bed-motion (CBM) and step-and-shoot (SS) acquisition modes on image quality and quantitative analysis in 18F-FDG(fluorodeoxyglucose) PET/CT (positron emission tomography/computed tomography) . Methods A total of 50 patients were prospectively selected and undertake PET image acquisition in Siemens Biograph Vision 600 PET/CT equipment with CBM and SS modes. Mean standardized uptake value (SUVmean) and standard deviation (SD) of mediastinal blood pool, lung, liver, muscle, and bone were measured, and evaluate image noise with SD. Paired t test, Paired rank sum testPearson correlation analysis and Bland-Altman Figure were used to evaluate the difference and relationship between the data of two groups. Results In different acquisition sequences, the SUVmean of mediastinal bloodPool and liver were decreased significantly (t= 5.630 and 4.993, all P<0.05), the SUVmean of lumbar vertebra was increased significantly (t=-3.320, P<0.05), while the SUVmean of lung and muscle was not significantly different (all P>0.05). In different acquisition modes, there were no significant difference in SUVmean of all tissues (t values:from-1.626 to-0.311, P>0.05), and there were high correlation with them (r values: from 0.903 to 0.985),the Bland-Altman Figure shows that the mean difference of each tissues are-0.02(95%CI:-0.27 to 0.24), -0.01(95%CI:-0.05 to 0.03), 0.00(95%CI:-0.19 to 0.18), -0.01(95%CI:-0.08 to 0.06), -0.03(95%CI:-0.28 to 0.22),and 0.00(95%CI:-0.07 to 0.08). Except for the SD of thigh muscle (Z= -1.163, P>0.05), the SSSD of other tissues was lower than that of CBMSD (Z=-4.406, -2.856, -5.556, -2.954 and -3.104, all P<0.05). Conclusion CBM is a flexible acquisition method, which can provide the same quantitative information as SS. It is an effective supplement to PET/CT image acquisition method.

Key words: positron emission tomography, step-and-shoot mode, continuous-bed-motion mode, mean standardized uptake value

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