能谱纯化Sn 150 kV结合ADMIRE在腰椎CT检查中的价值

蒋东; 秦立新

doi:10.15953/j.ctta.2022.240

能谱纯化Sn 150 kV结合ADMIRE在腰椎CT检查中的价值

doi: 10.15953/j.ctta.2022.240

蒋东,
秦立新^,

武汉市肺科医院放射科, 武汉430033

详细信息

作者简介:
蒋东：男，武汉市肺科医院放射科主管技师，主要从事全身个性化血管成像技术工作，E-mail：1033967404@qq.com

通讯作者:
男，武汉市肺科医院放射科主任医师，主要从事胸部影像诊断研究，E-mail：1975136040@qq.com

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- 被引次数: 0
出版历程
- 收稿日期: 2022-11-30
- 修回日期: 2023-04-02
- 录用日期: 2023-04-06
- 网络出版日期: 2023-09-07

Spectral filtration Sn 150 kV Combined with Advanced Simulated Iterative Reconstruction in Lumbar Computed Tomography Examination

JIANG Dong,
QIN Lixin^,

Wuhan Department of Radiology, Wuhan Pulmonary Hospital Wuhan 430033, China

摘要

摘要: 目的：研究能谱纯化(SPS)Sn 150 kV结合高级模拟迭代重建(ADMIRE)在腰椎CT检查中的可行性。方法：选取在我院行腰椎CT检查的患者88例，选取年龄在25～65岁，BMI在18.5～25 kg/m²的患者，随机分成对照组（A组）和试验组（B组），每组44例；对照组管电压120 kV，试验组管电压Sn 150 kV，其他扫描参数均一致，检查完成后，比较两组的图像质量和辐射剂量。结果：A组和B组图像客观评价噪声存在统计学差异，A组图像噪声高于B组；主观评价3位诊断者的ICC为0.769，表示评价一致性较好；B组的辐射剂量低于A组30.31％。结论：采用能谱纯化Sn 150kV结合ADMIRE，不但能有效减低辐射剂量，还可保证优质的图像质量，值得在成人腰椎CT中推广使用。
- 高级模拟 /
- 迭代重建 /
- 能谱纯化 /
- 腰椎
Abstract: Objective: To study the feasibility of energy spectrum purification Sn 150kV combined with Advanced Simulated Iterative Reconstruction (ADMIRE) in computed tomography (CT) examination of the lumbar spine. Methods: A total of 88 patients aged 25_-65 years with body mass indexes (BMI) between 18.5～25kg/m² were randomly divided into a control group (group A) and an experimental group (group B), with 44 cases in each group. The conventional tube voltage, used for the control group, was 120kV, while the experimental tube voltage was Sn 150kV. All other imaging parameters were consistent. After the inspection, the image quality and radiation dose of the two groups were compared. Results: The objective evaluation of noise in group A and group B were statistically different, with the noise of group A higher than that of group B. The ICC of the three diagnosticians in the subjective evaluation was 0.769, indicating a good consistency of evaluation. The radiation dose of group B was 30.31% lower than that of group A. Conclusion: The combination of energy spectrum purification Sn 150kV and ADMIRE can not only effectively reduce the radiation dose, but can also guarantee a high-quality image, which can be widely used in adult lumbar CT.
- advanced simulated /
- iterative reconstruction /
- SPS /
- lumbar spine

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图 1 管电压120 kV下CT值和噪声测量及矢状位重组图（重组层厚1 mm、间隔0.6 mm）

Figure 1. CT value, noise measurement, and sagittal position recombination at 120 kV tube voltage (recombination layer thickness 1 mm, interval 0.6 mm)

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图 2 管电压Sn 150 kV下CT值和噪声测量及矢状位重组图（重组层厚1 mm、间隔0.6 mm）

Figure 2. CT value, noise measurement, and sagittal position recombination at tube voltage Sn 150 kV (recombination layer thickness 1 mm, interval 0.6 mm)

下载: 全尺寸图片幻灯片

表 1 120 kV组和Sn 150 kV组图像质量客观评价表

Table 1. Objective evaluation of image quality in the 120 kV and Sn 150 kV groups

项目	组别		统计检验
项目	120 kV组	Sn 150 kV组	Z	P
腰大肌/HU	53.00（48.70～56.00）	47.90（43.70～51.00）	2.741	0.016
SD1	5.73（4.83～6.83）	5.09（4.69～5.24）	1.904	0.057
竖脊肌/HU	52.00（46.2～55.00）	43.50（38.20～51）	3.511	<0.001
SD2	5.41（5.27～5.98）	4.56（3.62～5.63）	3.964	<0.001
SNR	9.12（7.88～10.51）	9.86（7.95～10.02）	-0.693	0.488

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表 2 三位诊断医师的主观评分统计分析表

Table 2. Statistical analysis of the subjective scores from the three doctors interpreting the computed tomography images

指标	组别		P
指标	120 kV组	Sn 150 kV组	P
椎间盘	2.00±0.00	2.00±0.00	>0.999
椎间孔	1.98±0.15	1.98±0.15	0.156
黄韧带	1.95±0.21	2.00±0.00	0.562
硬膜囊	1.98±0.15	1.95±0.21	>0.999
小关节图像	2.00±0.00	2.00±0.00	0.320
整体图像质量	2.00±0.00	2.00±0.00	>0.999

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表 3 A组和B组辐射剂量统计表

Table 3. Radiation dose in groups A and B

项目	组别		统计检验
项目	A组	B组	Z	P
mAs	333.00（300.00～362.00）	237.50（222.00～261.00）	7.885	<0.001
CTDIvol	14.75（13.65～16.00）	6.57（5.20～7.23）	8.015	<0.001
DLP	413.60（351.00～425.50）	280.13（230.89～327.20）	6.946	<0.001
ED	4.55（3.86～4.68）	3.08（2.54～3.60）	6.946	<0.001

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