【摘要】：目的:探討能譜CT單能量成像對優(yōu)化肝臟血管圖像質(zhì)量的價值。方法:回顧性分析行腹部能譜CT檢查的35例腹部疾病患者的病例資料,應(yīng)用能譜分析軟件,分別采用140kVp混合能量模式(QC)、70keV單能量、最佳單能量模式進行肝總動脈、門靜脈及肝靜脈重建,比較QC、70keV和最佳單能量3組圖像肝總動脈、門靜脈及肝靜脈的CT值、圖像平均噪聲值(IN)、對比噪聲比(CNR)、信噪比(SNR)及圖像質(zhì)量主觀評分,并進行統(tǒng)計學(xué)分析。結(jié)果:最佳單能量組、70keV組、QC組肝總動脈的CNR分別為(24.55±10.86)、(18.12±8.32)和(11.64±4.64),圖像質(zhì)量評分分別為(4.74±0.16)、(4.04±0.30)和(3.62±0.35)分;門靜脈CNR分別為(6.94±2.73)、(4.26±1.90)和(2.97±2.11),圖像質(zhì)量評分分別為(4.45±0.30)、(3.87±0.37)和(3.30±0.34)分;肝靜脈CNR分別為(5.74±2.28)、(4.24±1.92)和(2.72±1.44),圖像質(zhì)量評分分別為(4.31±0.33)、(3.75±0.41)和(3.24±0.34)分,差異均有統(tǒng)計學(xué)意義(P值均0.01),組間兩兩比較差異也均有統(tǒng)計學(xué)意義(P值均0.05),最佳單能量組肝臟血管的CNR、SNR和圖像質(zhì)量主觀評分均優(yōu)于70keV單能量組和QC組。結(jié)論:能譜CT最佳單能量成像能夠提高肝臟動脈、門靜脈及肝靜脈的CNR和SNR,從而優(yōu)化肝臟血管圖像質(zhì)量。
[Abstract]:Objective: to evaluate the value of energy dispersive CT single-energy imaging in optimizing the quality of hepatic vascular images. Methods: the data of 35 patients with abdominal diseases were analyzed retrospectively. The common hepatic artery was performed with 140 KVP mixed energy model (QC) 70keV single energy and optimal single energy model. The CT values of common hepatic artery, portal vein and hepatic vein, image mean noise value (IN), contrast noise ratio (CNR), signal-to-noise ratio (SNR) and subjective score of image quality were compared and analyzed statistically. Results: in the best single energy group, the CNRs of the common hepatic artery were (24.55 鹵10.86), (18.12 鹵8.32) and (11.64 鹵4.64), the scores of image quality were (4.74 鹵0.16), (4.04 鹵0.30) and (3.62 鹵0.35), the scores of portal vein CNR were (6.94 鹵2.73), () 4.26 鹵1.90 and (2.97 鹵2.11), and the image quality scores were (4.45 鹵0.30), (3.87 鹵0.37) and (3.30 鹵0.34), respectively. The CNR of hepatic vein was (5.74 鹵2.28), (4.24 鹵1.92) and (2.72 鹵1.44), and the score of image quality was (4.31 鹵0.33), (, 3.75 鹵0.41) and (3.24 鹵0.34), respectively. The differences were statistically significant (P = 0.01), and the differences between the two groups were statistically significant (P = 0.05). The CNRN SNR and image quality subjective score of liver vessels in the best single energy group were better than those in the 70 Kev single energy group and QC group. Conclusion: energy dispersive CT can improve CNR and SNR of hepatic artery, portal vein and hepatic vein, so as to optimize the quality of hepatic vascular image.
【作者單位】： 河北大學(xué)附屬醫(yī)院CT/MRI室;
【基金】：2015年河北省科技計劃項目(15277740D) 2014年河北省醫(yī)學(xué)科學(xué)研究重點課題項目(ZD20140443) 2015河北省政府資助臨床醫(yī)學(xué)優(yōu)秀人才培養(yǎng)項目(361007) 河北大學(xué)附屬醫(yī)院青年基金(2015Q001)
【分類號】：R575;R816.5

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