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| Application value of spiral CT low-dose scanning in monitoring the condition of pulmonary tuberculosis |
| ZHANG Yunxuan1, ZHANG He2, XIN Yazhou1, HU Xianhua1, WU Huiwen1, RAO Guofeng1, TIAN Leqing1 |
1. The Second Hospital of Huangshi City, Huangshi 435002 China;
2. Huangshi Maternity and Children's Health Hospital of Edong Healthcare Group |
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Abstract Objective To investigate the application value of 64-row 128-slice spiral CT low -dose scanning technique in monitoring the condition of pulmonary tuberculosis. Methods The 120 pulmonary tuberculosis patients diagnosed in our hospital were collected. Routine dose(120 mA) and the following Low-dose(15~40 mA) scanning were used with the same tube voltage of 120Kv and other factors. Read a slice in a blind manner to record CT dose Index volume(CTDIvol) and dose-length product(DLP). Effective dose (ED) was estimated according to effective dose conversion factor. The special imaging manifestations of low-dose and conventional dose scanning and thin-layer reconstruction were compared for quantitative measurement and difference analysis. Results There was no significant difference between the two scanning methods in terms of the basic signs of tuberculosis, such as consolidation, bronchiectasis, cavitation, ground-class opacity, calcification, tree-in-bud sign, nodule, pleural hypertrophy and hydrothorax. The X-ray radiation dose received by the subjects in low-dose scanning decreased significantly. Conclusion Compared with the conventional dose, the low-dose scanning technique of PHILIPS 64-slice spiral CT can significantly reduce the radiation dose under the condition of guaranteeing the detection effect, which can be applied to the clinical diagnosis and follow-up of pulmonary tuberculosis.
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Received: 22 October 2018
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