SPECT双探头前、后位显像分别测量腮腺功能的比较研究

doi:10.12117/jccmi.2019.06.001

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Abstract Objective: To investigate the difference of the functional parameters of the parotid glands obtained by the anterior and posterior scanning in SPECT salivary glands scintigraphy(SGS). Methods: Sixty-four patients underwent SGS, which was performed by dual-detector SPECT with 99TcmO4-. The parotid ROI was delineated to obtain the net counts of parotid glands(Countnet). The 15 min uptake ratio(UR15) of the parotid gland, and the excretion fraction(EF) after acid stimulation at the anterior and posterior imaging were calculated. The Wilcoxon rank-sum test was used to compare the difference in the 15 min net counts(Countnet15), the maximum net count before acid stimulation(Countmax) of the parotid glands, the UR15 and EF of the anterior and posterior scanning, respectively. Results: In the anterior and posterior images, the Countnet15 of the left parotid gland were 2.46±1.29 vs. 2.92±1.70(Z=-3.42, P=0.01), and the right ones were 2.82±1.55 vs. 3.06±1.76, respectively(Z=-2.25, P=0.03). The Countmax of left parotid gland were 2.79±1.50 vs. 3.23±1.87(Z=-3.09, P＜0.01), and the right ones were 3.20±1.69 vs. 3.48±1.92(Z=-2.17, P=0.03). The UR15 of the left parotid at the anterior and posterior images were (1.71±0.76)% vs. (2.74±1.38)%(Z=-6.34, P＜0.01), and the right were (1.97±1.01)% vs. (2.86±1.45)%(Z=-6.11, P＜0.01). The EF of the left parotid were (74.84±14.81)% vs. (76.61±15.91)% (Z=-3.92, P＜0.01), and the right were (71.17±15.34)% vs. (71.48±14.90)% (Z=-4.68, P＜0.01). The Countnet15 and Countmax of both parotid glands in the posterior images were significantly higher than the anterior ones. The anterior UR15 of both parotid glands were significantly higher than that in the posterior ones. The EF of both parotids in the posterior images were significantly lower than that in the anterior. Conclusion: There are differences in the uptake and excretion of parotid glands dynamic imaging between the anterior and posterior scanning. The difference is caused by the osseous attenuation of the mandibular branch.

Key words： Parotid gland Tomography, emission-computed, single-photon Tomography, X-ray computed

Received: 03 July 2018

PACS:	Ｒ333
	Ｒ817.4
	Ｒ814.42

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	Articles by authors
	ZENG Yu
	LI Ya-ming
	LI Xue-na
	LIU Xiao-feng
	DU Bu-lin
	LI De-shun

Cite this article:

ZENG Yu,LI Ya-ming,LI Xue-na, et al. An investigation of dual-detector SPECT measuring the function of parotid glands by anterior or posterior scanning[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(6): 381-385.

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http://www.jccmi.com.cn/EN/10.12117/jccmi.2019.06.001 OR http://www.jccmi.com.cn/EN/Y2019/V30/I6/381

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