Dual-layer spectral detector CT is a new spectrum CT imaging technology based on detector being able to obtain both images similar to true plain and spectral images in one time scanning.The reconstructed multi-paramet...Dual-layer spectral detector CT is a new spectrum CT imaging technology based on detector being able to obtain both images similar to true plain and spectral images in one time scanning.The reconstructed multi-parameter spectral images can not only improve image quality,enhance tissue contrast,increase the visualization and detection ability of occult lesions,but also provide qualitative and quantitative analysis of the lesions,so as to provide more imaging information and multi-dimensional diagnostic basis.The research progresses of dual-layer spectral detector CT for preoperative evaluation on colorectal cancer were reviewed in this article.展开更多
目的:探讨锥光束乳腺CT(CBBCT)扫描技术在肿块型病变良恶性鉴别诊断价值。方法:本研究分析行CBBCT平扫及增强扫描并符合病例纳入标准患者24例(共40个病灶),其中良性组9例(12个病灶),恶性组15例(28个病灶)。统计平扫、增强扫描病灶检出率...目的:探讨锥光束乳腺CT(CBBCT)扫描技术在肿块型病变良恶性鉴别诊断价值。方法:本研究分析行CBBCT平扫及增强扫描并符合病例纳入标准患者24例(共40个病灶),其中良性组9例(12个病灶),恶性组15例(28个病灶)。统计平扫、增强扫描病灶检出率,分析比较良、恶性组增强形态学征象及时间-密度曲线特点,统计分析平扫未检出组与检出组病灶最大径、良性组和恶性组增强参数有无统计学差异。结果:40个病灶平扫检出率和增强检出率分别为23/40、40/40,平扫检出组病灶最大径>未检出组(2.76±1.54cm vs 1.31±0.58cm)且差异有统计学意义。良、恶性组时间-密度曲线形态不同,良性组以缓慢上升和缓慢平台型为主(10/12),恶性组以中等/快速平台型和快速流出型为主(24/28)。恶性组增强第1期CT值和增强1期强化率高于良性组(190.86±59.80Hu vs 120.77±59.78Hu;151.00%±1.17 vs 19.41%±0.15),而增强2期强化率低于良性组(-2.95%±0.13 vs 16.56%±0.22)且差异有统计学意义;以上3个增强参数ROC曲线下面积分别为0.804、0.994、0.217(增强1期强化率诊断效能最高,最佳诊断阈值53.81%)。结论:CBBCT增强检查较平扫能提高病变检出率且增强形态学征象及增强参数有助于提高乳腺癌与良性病变鉴别诊断准确性。展开更多
文摘Dual-layer spectral detector CT is a new spectrum CT imaging technology based on detector being able to obtain both images similar to true plain and spectral images in one time scanning.The reconstructed multi-parameter spectral images can not only improve image quality,enhance tissue contrast,increase the visualization and detection ability of occult lesions,but also provide qualitative and quantitative analysis of the lesions,so as to provide more imaging information and multi-dimensional diagnostic basis.The research progresses of dual-layer spectral detector CT for preoperative evaluation on colorectal cancer were reviewed in this article.
文摘目的:探讨锥光束乳腺CT(CBBCT)扫描技术在肿块型病变良恶性鉴别诊断价值。方法:本研究分析行CBBCT平扫及增强扫描并符合病例纳入标准患者24例(共40个病灶),其中良性组9例(12个病灶),恶性组15例(28个病灶)。统计平扫、增强扫描病灶检出率,分析比较良、恶性组增强形态学征象及时间-密度曲线特点,统计分析平扫未检出组与检出组病灶最大径、良性组和恶性组增强参数有无统计学差异。结果:40个病灶平扫检出率和增强检出率分别为23/40、40/40,平扫检出组病灶最大径>未检出组(2.76±1.54cm vs 1.31±0.58cm)且差异有统计学意义。良、恶性组时间-密度曲线形态不同,良性组以缓慢上升和缓慢平台型为主(10/12),恶性组以中等/快速平台型和快速流出型为主(24/28)。恶性组增强第1期CT值和增强1期强化率高于良性组(190.86±59.80Hu vs 120.77±59.78Hu;151.00%±1.17 vs 19.41%±0.15),而增强2期强化率低于良性组(-2.95%±0.13 vs 16.56%±0.22)且差异有统计学意义;以上3个增强参数ROC曲线下面积分别为0.804、0.994、0.217(增强1期强化率诊断效能最高,最佳诊断阈值53.81%)。结论:CBBCT增强检查较平扫能提高病变检出率且增强形态学征象及增强参数有助于提高乳腺癌与良性病变鉴别诊断准确性。
