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首页> 外文期刊>日本放射线技术学会杂志 >収縮末期再構成となった高心拍数症例の冠動脈CT撮影におけるRR問隔,最適再構成心位相,時問分解能,画質の関係: 高心拍数症例の最適撮影プロトコルを求めて
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収縮末期再構成となった高心拍数症例の冠動脈CT撮影におけるRR問隔,最適再構成心位相,時問分解能,画質の関係: 高心拍数症例の最適撮影プロトコルを求めて

机译:高心率病例末端收缩期重建的冠状动脉计算机断层扫描中RR间隔,最佳重建心脏相位,时间分辨率和图像质量之间的关系:寻找高心率病例的最佳成像方案

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The purpose of this study is to elucidate the relationship among RR interval (RR), the optimal reconstruction phase, and adequate temporal resolution (TR) to obtain coronary CT angiography images of acceptable quality using 64-MDCT (Aquilion 64) of end-systolic reconstruction in 407 patients with high heart rates. Image quality was classified into 3 groups [rank A (excellent): 161, rank B (acceptable): 207, and rank C (unacceptable): 39 patients]. The optimal absolute phase (OAP) significantly correlated with RR [OAP (ms)=119-0.286RR (ms), r=0.832, p<0.0001], and the optimal relative phase (ORP) also significantly correlated with RR [ORP (%)=62-0.023RR (ms), r=0.656, p<0.0001], and the correlation coefficient of OAP was significantly (p<0.0001) higher than that of ORP. The OAP range (+2SD) in which it is highly possible to get a static image was from [119-0.286RR (ms)-46] to [119-0.286RR (ms)+46]. The TR was significantly different among ranks A (97±22 ms), B (111+31 ms) and C (135±34 ms). The TR significantly correlated with RR in ranks A (TR=-16+0.149RR, r=0.767, p<0.0001), B (TR=-15+0.166RR, r=0.646, p<0.0001), and C (TR=52+0.117RR, r=0.425, p=0.0069). Rank C was distinguished from ranks A or B by linear discriminate analysis (TR=-46+0.21RR), and the discriminate rate was 82.6%. In conclusion, both the OAP and adequate TR depend on RR, and the OAP range (±2SD) can be calculated using the formula [119-0.286RR (ms)-46] to [119-0.286RR (ms)+46], and an adequate TR value would be less than (-46+0.21RR).%64列multidetector-row computed tomographyrn(MDCT)は冠動脈疾患の有用な診断ツールとして1~6)rn普及してきたが,retrospective ECG-gatingbelicalrnscanの被ばく線量は平均18.1±3.0mSv(範囲12.6-rn26.9mSv)7)で,診断カテーテル検査の平均被ばく線rn量8.5±4.4mSv(範囲1.4-20.5mSv)8)より高く,被ばくrn線量の低減が大きな課題となっている.
机译:这项研究的目的是阐明RR间隔(RR),最佳重建阶段和足够的时间分辨率(TR)之间的关系,以使用收缩末期的64-MDCT(Aquilion 64)获得质量可接受的冠状CT血管造影图像。 407例高心率患者的重建。图像质量分为3组[A级(优秀):161,B级(可接受):207,C级(不可接受):39位患者]。最佳绝对相位(OAP)与RR [OAP(ms)= 119-0.286RR(ms),r = 0.832,p <0.0001]显着相关,并且最佳相对相位(ORP)也与RR [ORP( %)= 62-0.023RR(ms),r = 0.656,p <0.0001],并且OAP的相关系数显着(p <0.0001)高于ORP。极有可能获得静态图像的OAP范围(+ 2SD)为[119-0.286RR(ms)-46]至[119-0.286RR(ms)+46]。在等级A(97±22 ms),等级B(111 + 31 ms)和等级C(135±34 ms)之间,TR显着不同。 TR与等级A(TR = -16 + 0.149RR,r = 0.767,p <0.0001),B(TR = -15 + 0.166RR,r = 0.646,p <0.0001)和C(TR)的RR显着相关。 = 52 + 0.117RR,r = 0.425,p = 0.0069)。通过线性判别分析(TR = -46 + 0.21RR)将等级C与等级A或B区分,区分率为82.6%。总之,OAP和适当的TR均取决于RR,并且可以使用公式[119-0.286RR(ms)-46]至[119-0.286RR(ms)+46]计算OAP范围(±2SD)。 ,并且适当的TR值应小于(-46 + 0.21RR)。%64列多排行计算机断层扫描rn(MDCT)は冠状动脉疾患の有用な诊断ツールとして1〜6)rn扩张してきたが,回顾性心电图-gatingbelicalrnscanの被ばく线量は平均18.1±3.0mSv(范囲12.6-rn26.9mSv)7)で,诊断カテーテル検查の平均被ばく线量量8.5±4.4mSv(范囲1.4-20.5mSv)8)より高く,被ばくrn线量の低减が大きなスとなっている。

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