| 吴丹,郝悦,郭士婷,李婧雯,张欣.螺旋采集对99Tcm-ECD SPECT/CT脑血流灌注显像图像质量的影响[J].中国医学影像技术,2023,39(11):1726~1730 |
| 螺旋采集对99Tcm-ECD SPECT/CT脑血流灌注显像图像质量的影响 |
| Impact of SwiftScan step-and-shoot continuous acquisition on 99Tcm-ECD SPECT/CT imaging quality of cerebral blood flow perfusion |
| 投稿时间：2023-06-09 修订日期：2023-09-06 |
| DOI：10.13929/j.issn.1003-3289.2023.11.030 |
| 中文关键词: 脑血管疾病 体层摄影术,发射型计算机,单光子 图像质量 |
| 英文关键词:cerebrovascular disorders tomography, emission computed, single photon image quality |
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| 中文摘要: |
| 目的 观察螺旋采集模式对99Tcm-ECD SPECT/CT脑血流灌注显像图像质量的影响。方法 回顾性分析55例接受螺旋采集模式99Tcm-ECD SPECT/CT的脑血流灌注减低患者资料,经后处理获得步进式(SS,SS组)、步进连续式(SSC,SSC组)、SSC75%-time(模拟SSC减少25%采集时间)及SSC50%-time(模拟SSC减少50%采集时间)SPECT/CT图像;采用视觉模拟评分法(VAS)及半定量法对比4组图像质量。结果 SS组、SSC组、SSC75%-time组及SSC50%-time组图像VAS评分分别为4.0(4.0,4.5)分、5.0(4.5,5.0)分、3.5(3.0,3.5)分及2.5(2.0,3.0)分,差异有统计学意义(χ2=89.02,P＜0.001)。4组图像中,脑血流低灌注灶放射性计数最大值、最小值及平均值差异均有统计学意义(P均＜0.001);SSC组放射性计数最大值、最小值及平均值均明显高于其他3组(P均＜0.001)。4组图像均匀度、噪声、病灶对比度、病灶对比噪声比及病灶直径,以及16个脑区靶/非靶比值及右脑平均放射性计数/左脑平均放射性计数比值差异均无统计学意义(P均＞0.05)。结论 螺旋采集模式可提高99Tcm-ECD SPECT/CT脑血流灌注显像图像质量。 |
| 英文摘要: |
| Objective To observe the impact of SwiftScan step-and-shoot continuous (SSC) acquisition mode on imaging quality of cerebral blood flow perfusion based on 99Tcm-ECD SPECT/CT. Methods Date of 55 patients with decreased brain blood flow perfusion who underwent 99Tcm-ECD SPECT/CT brain metabolic using SwiftScan SSC acquisition mode were retrospectively analyzed. Post-processed was used to obtain step-and-shoot (SS, SS group), SSC, SSC75%-time (acquisition time reduced by 25%) and SSC50%-time (acquisition time reduced by 50%) SPECT/CT fusion images. Visual analogue scale (VAS) and semi-quantitative analysis were performed to compare quality of different images. Results VAS scores of SS group, SSC group, SSC75%-time group and SSC50%-time group was 4.0(4.0, 4.5) points, 5.0(4.5, 5.0) points, 3.5(3.0, 3.5) points and 2.5(2.0, 3.0) points, respectively, all were significantly different (χ2=89.02, P＜0.001). Significant differences of the maximum, minimum and mean values of radiation counts were found among 4 groups (all P＜0.001). The maximum, minimum and mean values of radiation counts in SSC group were all obviously higher than those in the rest 3 group (all P＜0.001). No significant difference of imaging uniformity, noise, lesion contrast, lesion contrast-noise ratio and lesion diameter was found among the 4 groups, nor of target/non-target ratio and right cerebral radiation count/left cerebral radiation count ratio among the 16 brain regions (all P＞0.05). Conclusion SwiftScan SSC acquisition mode could improve imaging quality of 99Tcm-ECD SPECT/CT cerebral blood blow perfusion. |
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