Diagnostic value of the third generation dual source CT in scanning pulmonary nodules by low radiation dose

doi:10.3877/cma.j.issn.2095-655X.2018.04.002

Abstract

Abstract:

Objective

To explore the diagnostic value of the third generation dual source CT in screening pulmonary nodules.

Methods

From June 2016 to January 2018, the third generation dual source CT and DR aiming at healthy people were performed in the Department of Radiology of Baotou Central Hospital. A total of 742 cases′ basic information and image data were collected. Based on gender, age and smoking history, the detection rates of non-calcified lung nodules in the third generation dual source CT and DR were analyzed by chi-square test. The detection rates of non-calcified pulmonary nodules and radiation doses in two imaging methods were compared by chi-square test and t test of two independent samples. Multivariate Logistic regression analysis was used to analyze the influencing factors of pulmonary nodules based on the results of CT detection.

Results

The detection of non-calcified pulmonary nodules by CT in male group (12.63%, 37/293) compared with women group (10.24%, 46/449), 40≤age <50 years old group (10.14%, 42/414) compared with aged 50 or more group (12.50%, 41/328), there were no statistically significant differences in both (χ²=1.01, 1.02, all P>0.05). The non-calcified pulmonary nodule detection rate by CT in the smoking group was 20.00% (42/210), which was significantly higher than that in the non-smoking group (7.71%, 41/532), and the difference was statistically significant (χ²=22.90, P<0.01). The detection rate of pulmonary nodules by DR was 0.94% (7/742), and by CT was 11.19% (83/742), the difference was statistically significant (χ²=76.02, P<0.05). The average radiation dose of DR was (0.16±0.04) mSv and CT was (0.28±0.06) mSv, the difference was statistically significant (t=45.03, P<0.01). Multivariate Logistic regression analysis showed that smoking was the influencing factor of pulmonary nodules (OR=4.68, 95%CI: 2.15-10.18, P<0.01).

Conclusions

The third generation dual source CT has high detection rate and low radiation dose for large pitch scanning lung nodules. It can be popularized in lung examination for people over 40 years old. Smoking is a risk factor for the occurrence of pulmonary nodules.

Key words: Pulmonary nodule, Tomography, X-ray computed, Diagnosis

Xinhua Wang, Yanli Zhou, Xiaolin Liu, Maorong Zhou, Kai Sun, Bin Lyu. Diagnostic value of the third generation dual source CT in scanning pulmonary nodules by low radiation dose[J]. Chinese Journal of Diagnostics(Electronic Edition), 2018, 06(04): 222-225.

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References 20

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项目		未检出(n＝659)	检出(n＝83)	合计(n＝742)	χ²值	P值
性别		?	?	?	1.01	>0.05
?	男	256(87.37)	37(12.63)	293(39.49)	?	?
?	女	403(89.76)	46(10.24)	449(60.51)	?	?
年龄		?	?	?	1.02	>0.05
?	40～49岁	372(89.86)	42(10.14)	414(55.80)	?	?
?	≥50岁	287(87.50)	41(12.50)	328(44.20)	?	?
吸烟史		?	?	?	22.90	<0.01
?	无	491(92.29)	41(7.71)	532(71.70)	?	?
?	有	168(80.00)	42(20.00)	210(28.30)	?	?

项目		未检出(n＝659)	检出(n＝83)	合计(n＝742)	χ²值	P值
性别		?	?	?	1.01	>0.05
?	男	256(87.37)	37(12.63)	293(39.49)	?	?
?	女	403(89.76)	46(10.24)	449(60.51)	?	?
年龄		?	?	?	1.02	>0.05
?	40～49岁	372(89.86)	42(10.14)	414(55.80)	?	?
?	≥50岁	287(87.50)	41(12.50)	328(44.20)	?	?
吸烟史		?	?	?	22.90	<0.01
?	无	491(92.29)	41(7.71)	532(71.70)	?	?
?	有	168(80.00)	42(20.00)	210(28.30)	?	?

变量	B	SE	Wald	P值	OR值	OR(95%CI)
性别	－0.76	0.40	3.62	>0.05	0.47	0.22～1.02
吸烟史	1.54	0.40	15.14	<0.01	4.68	2.15～10.18
常数项	－3.05	0.62	24.06	<0.01	－－	－－

变量	B	SE	Wald	P值	OR值	OR(95%CI)
性别	－0.76	0.40	3.62	>0.05	0.47	0.22～1.02
吸烟史	1.54	0.40	15.14	<0.01	4.68	2.15～10.18
常数项	－3.05	0.62	24.06	<0.01	－－	－－

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