Value of low-dose multi-slice spiral CT chest scan in diagnosis of coal workers' pneumoconiosis
10.3760/cma.j.issn.1001-9391.2016.09.009
- VernacularTitle:多层螺旋CT胸部低剂量扫描在煤工尘肺诊断中的应用
- Author:
Peng DU
1
;
Aihong CAO
;
Ziwei GUO
;
Qing SHAO
;
Kai XU
Author Information
1. 221000,徐州医学院第二附属医院影像科
- Keywords:
Pneumoconisis;
Tomography;
X-ray computer;
Radiation dose
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2016;34(9):674-677
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of low-dose multi-slice CT (MSCT) chest scan in the diagnosis of coal workers' pneumoconiosis.Methods A total of 90 patients with a confirmed diagnosis of coal workers' pneumoconiosis were enrolled,and under the conditions of fixed tube voltage,pitch,and slice thickness,they underwent CT scan with a normal dose (150 mA) and a low dose (30-50 mA).The quality of images obtained from two scans was compared,and the imaging findings,opacity profusion,stage,and radiation doses were also compared.Results Compared with the normal-dose scan,low-dose scan increased the image noise,and the images obtained from scans with doses of 30,40,and 50 mA did not show significant reductions in signal-to-noise ratio or contrast-to-noise ratio (P＞0.05).There was no significant difference in the percentage of image quality between low-dose and normal-dose scans (P＞0.05).There were no significant differences in the percentage of various imaging findings,opacity profusion,or percentage of different stages between low-dose (30,40,and 50 mA) and normal-dose (150 mA) scans (P＞0.05).Conclusion There are no significant differences between low-dose MSCT chest scan and normal-dose CT in image quality,imaging findings of coal workers" pneumoconiosis,opacity profusion,and stage.Meanwhile,low-dose MSCT chest scan greatly reduces the radiation dose and can be used to assist the diagnosis and follow-up reexamination of coal workers" pneumoconiosis and cover the shortage of high-kilovoltage chest X-ray.
