Assessment of the severity of pulmonary hypertension by CT pulmonary artery imaging with different doses(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2020年第11期
- Page:
- 1403-1407
- Research Field:
- 医学影像物理
- Publishing date:
Info
- Title:
- Assessment of the severity of pulmonary hypertension by CT pulmonary artery imaging with different doses
- Author(s):
- MA Zhenyuan; ZOU Ying; LIAO Yurong; CAO Zhiting; LU Liumei
- Department of Radiology, Liuzhou Peoples Hospital, Liuzhou 545007, China
- Keywords:
- Keywords: computed tomography pulmonary angiography pulmonary hypertension ct value contrast noise ratio image signal noise ratio effective dose
- PACS:
- R816.41
- DOI:
- DOI:10.3969/j.issn.1005-202X.2020.11.012
- Abstract:
- Abstract: Objective To explore the value of computed tomography pulmonary angiography (CTPA) with different doses in evaluating the severity of pulmonary hypertension (PH). Methods 70 patients diagnosed with PH were selected and divided into a control group (n=35) and a low-dose group (n=35) according to random number table method. In the control group, 60-80 mL contrast media was used for scanning. In the low-dose group, 35 mL contrast media was used. The average pulmonary artery CT, contrast noise ratio (CNR), image signal noise ratio (SNR), effective dose (ED) and image score was compared between the two groups. The Effects of CTPA with different doses on the diagnostic rate of PH severity and its effects on the diagnostic efficacy of PH severity were also compared. Results Compared with the control group, the CT value and CNR of the low-dose group were significantly higher, the ED was significantly lower, and the differences were statistically significant (P<0.05). The differences in SNR and image scores between the two groups was not statistically significant (P>0.05). Compared with the control group (80.00%), the low-dose group had a significantly higher diagnosis rate (91.43%) for the severity of PH, Compared with the control group, the sensitivity, specificity, accuracy, positive predictive value, negative predictive value, and area under ROC curve of the CTPA significantly increased in low-dose group when diagnosing the severity of PH, and the difference was statistically significant (P<0.05). Conclusion The value of CTPA with different does for the severity evaluation of PH is different. The value of small doses is higher, which can significantly improve the CT value, CNR and accuracy of diagnosis and has certain reference value for the clinic.
Last Update: 2020-12-02