[Retracted] Research Value of Intensity Modulated Radiation Therapy in Alleviating Parotid Gland Function Injury in Patients with Stage N0 Nasopharyngeal Carcinoma from Physical and Dosimetric Aspects

Table 3

Comparison of quantitative determination results of 99mTc radionuclide imaging of the parotid gland before and after radiotherapy between the two groups.

	3D-CRT group ()	IMRT group ()
Before radiotherapy
UI			0.4159	0.6787
EI			0.6352	0.5272
At the end of radiotherapy
UI			1.3526	0.1803
EI			1.1828	0.2406
3 months after radiotherapy
UI			0.5152	0.6079
EI			2.0646	0.0424
6 months after radiotherapy
UI			4.9893	<0.0001
EI			4.0503	0.0001
12 months after radiotherapy
UI			10.1353	<0.0001
EI			3.2465	0.0017

Notes: UI: uptake index; EI: excretion index.