【摘要】：目的比較不同劑量前瞻性門(mén)控軸面掃描心臟冠狀動(dòng)脈多層螺旋CT成像質(zhì)量及輻射劑量。方法抽取通過(guò)前瞻性門(mén)控軸面掃描擬行心臟冠狀動(dòng)脈成像的80例患者為研究對(duì)象,隨機(jī)雙盲法將其分為兩組,每組40例,120k V/100m As者為低劑量組,120k V/200m As者為常規(guī)劑量組,多層螺旋CT掃描后專業(yè)人員處理圖像,比較兩組圖像質(zhì)量及有效輻射劑量等指標(biāo)。結(jié)果低劑量組圖像質(zhì)量:優(yōu)30例,良10例;常規(guī)劑量組圖像質(zhì)量:優(yōu)31例,良9例,兩組圖像質(zhì)量比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05);兩組SNR、CNR比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05);低劑量組ED(1.71±0.18)m Sv顯著低于常規(guī)劑量組的(2.86±0.44)m Sv,差異有統(tǒng)計(jì)學(xué)意義(P0.01)。結(jié)論低劑量前瞻性門(mén)控軸面掃描成像與常規(guī)劑量成像質(zhì)量類似,但能顯著減少受檢者輻射劑量,值得臨床推廣。
[Abstract]:Objective to compare the imaging quality and radiation dose of multislice spiral CT in cardiac coronary artery with different dose prospective gated axial scan. Methods A total of 80 patients undergoing prospective gated axial scanning were randomly divided into two groups: 40 patients in each group and 120 kV / 100m As as low dose group. In 120kV / 200m As group, the images were processed by professionals after multi-slice spiral CT scanning. The image quality and effective radiation dose were compared between the two groups. Results in the low dose group, the image quality was excellent in 30 cases and good in 10 cases, while in the routine dose group, the image quality was excellent in 31 cases and good in 9 cases. There was no significant difference in image quality between the two groups (P0.05). There was no significant difference in SNR,CNR between the two groups (P0.05), and ED in the low dose group (1.71 鹵0.18) m Sv) was significantly lower than that in the conventional dose group (2.86 鹵0.44) m Sv,) (P0.01). Conclusion the quality of low dose prospective gated axial scanning is similar to that of conventional dose imaging, but it can significantly reduce the radiation dose of the patients, which is worthy of clinical application.
【作者單位】： 湖北省荊州市第二人民醫(yī)院CT室;
【分類號(hào)】：R816.2;R541.4

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