To accelerate the scan speed and improve the image quality, a new type of CT configuration, "double-source double-multislice spiral CT" (DSDMS-CT), which is based on two sets of single-source multislice spir...To accelerate the scan speed and improve the image quality, a new type of CT configuration, "double-source double-multislice spiral CT" (DSDMS-CT), which is based on two sets of single-source multislice spiral CT was proposed with a special reconstruction algorithm. Simulation results using the fan-beam filtered backprojection algorithm with a special interpolation method were presented for both single-source multislice spiral CT and DSDMS-CT. The results of new CT model show that it scans faster than the traditional spiral CT and has a better slice sensitivity profile (SSP) with larger pitch value.展开更多
目的研究单源单能量CT双能量成像法检测体外泌尿系结石成分的可行性。方法使用单源单能量64排CT分别采集36例尿路结石样本在80 KVp及140 KVp图像,并分别测量结石样本CT值,根据公式计算出DEI(dual energy index,DEI)。结果纯尿酸结石DEI=...目的研究单源单能量CT双能量成像法检测体外泌尿系结石成分的可行性。方法使用单源单能量64排CT分别采集36例尿路结石样本在80 KVp及140 KVp图像,并分别测量结石样本CT值,根据公式计算出DEI(dual energy index,DEI)。结果纯尿酸结石DEI=(0.01230±0.00412),混合尿酸结石DEI=(0.03613±0.01255),含钙结石DEI=(0.09901±0.01553),鸟粪石DEI=(0.06176±0.00650),胱氨酸结石DEI=(0.05825±0.00774)。纯尿酸结石和非纯尿酸结石之间DEI值有统计学差异(P<0.05);纯尿酸、混合尿酸、含钙结石之间DEI均有统计学差异(P<0.05);鸟粪石、胱氨酸结石之间和它们与混合尿酸、含钙结石之间DEI没有统计学差异。结论单源单能量CT双能量成像法是一种方便、快捷的方法,可在没有双源双能量CT及能谱CT的情况下明确泌尿系结石的成分,对临床上进一步的诊断及治疗方案的选择是非常有价值的。展开更多
基金The National Natural Science Foundation ofChina (No30570511)
文摘To accelerate the scan speed and improve the image quality, a new type of CT configuration, "double-source double-multislice spiral CT" (DSDMS-CT), which is based on two sets of single-source multislice spiral CT was proposed with a special reconstruction algorithm. Simulation results using the fan-beam filtered backprojection algorithm with a special interpolation method were presented for both single-source multislice spiral CT and DSDMS-CT. The results of new CT model show that it scans faster than the traditional spiral CT and has a better slice sensitivity profile (SSP) with larger pitch value.
文摘目的研究单源单能量CT双能量成像法检测体外泌尿系结石成分的可行性。方法使用单源单能量64排CT分别采集36例尿路结石样本在80 KVp及140 KVp图像,并分别测量结石样本CT值,根据公式计算出DEI(dual energy index,DEI)。结果纯尿酸结石DEI=(0.01230±0.00412),混合尿酸结石DEI=(0.03613±0.01255),含钙结石DEI=(0.09901±0.01553),鸟粪石DEI=(0.06176±0.00650),胱氨酸结石DEI=(0.05825±0.00774)。纯尿酸结石和非纯尿酸结石之间DEI值有统计学差异(P<0.05);纯尿酸、混合尿酸、含钙结石之间DEI均有统计学差异(P<0.05);鸟粪石、胱氨酸结石之间和它们与混合尿酸、含钙结石之间DEI没有统计学差异。结论单源单能量CT双能量成像法是一种方便、快捷的方法,可在没有双源双能量CT及能谱CT的情况下明确泌尿系结石的成分,对临床上进一步的诊断及治疗方案的选择是非常有价值的。
