本文選題：胸部 + 體層攝影術(shù)�。� 參考：《中國醫(yī)學(xué)影像學(xué)雜志》2017年10期

【摘要】：目的探討自適應(yīng)統(tǒng)計迭代重建(ASIR)技術(shù)在胸部低劑量檢查中噪聲指數(shù)(NI)的最佳值,以減少患者的輻射劑量。資料與方法根據(jù)NI的不同將1200例中老年健康體檢者隨機分成4組,每組300例,A組:NI=20;B組:NI=25;C組:NI=30;D組為常規(guī)組NI=14,并結(jié)合ASIR技術(shù)對軸位圖像質(zhì)量進行閱讀、評價,根據(jù)圖像質(zhì)量及疾病的顯示滿意程度進行評分,并記錄結(jié)果。結(jié)果各組圖像的主觀評分分別為A組(3.53±0.43)分、B組(3.28±0.32)分、C組(3.12±0.18)分、D組(5.00±0)分;4組均3分,可用于診斷;體重指數(shù)分別為(24.39±3.09)kg/m~2、(25.49±2.45)kg/m~2、(25.53±3.21)kg/m~2、(25.55±2.28)kg/m~2;層數(shù)分別為60.64±6.38、64.42±5.71、61.77±6.45、62.32±6.15,4組間比較差異無統(tǒng)計學(xué)意義(P0.05);有效劑量(ED)分別為(1.66±0.84)mSv、(1.11±0.34)mSv、(0.88±0.30)mSv、(5.99±1.37)mSv,4組間兩兩比較差異均有統(tǒng)計學(xué)意義(均P0.05);C組ED最低,比D組輻射劑量低85%、比A組低47%、比B組低21%。結(jié)論結(jié)合ASIR技術(shù),選擇NI=30既能保證圖像質(zhì)量滿足診斷需求,又能有效降低輻射劑量,是一種較好的掃描方案。
[Abstract]:Objective to study the best value of the noise index (NII) of adaptive statistical iterative reconstruction (ASIRR) technique in low dose chest examination in order to reduce the radiation dose of patients. Materials and methods 1200 middle-aged and elderly healthy persons were randomly divided into 4 groups according to NI. Each group was divided into 4 groups: group A, group B, group B: 1, group 1: NI25, group C, group 1, group D, group Score according to the image quality and the degree of satisfaction of the disease, and record the results. Results the subjective scores of each group were 3.53 鹵0.43 in group A, 3.28 鹵0.32 in group B, 3.12 鹵0.18 in group C, 3.12 鹵0.18 in group C and 5.00 鹵0 in group D, respectively. 浣撻噸鎸囨暟鍒嗗埆涓，

本文編號：1915838