Objective: To explore the significance of dual-energy CT non-linear fusion technique in improving the quality of CTA image of renal cancer. Methods: The CTA images of 100 patients who had been confirmed by pathology a...Objective: To explore the significance of dual-energy CT non-linear fusion technique in improving the quality of CTA image of renal cancer. Methods: The CTA images of 100 patients who had been confirmed by pathology as renal cancer were collected and were randomly divided into experimental group and control group with 50 cases respectively. The two groups of patients were treated with iodine concentration of 300 mg/ml and 350 mg/ml non-ionic contrast agent, with a dosage of 1.5 ml/kg and an injection rate of 4 ml/s. The contrast agent intelligently tracking method was adopted bolus. The control group used the conventional CTA scanning, with a reference tube voltage/tube current of 100 kv/ref150 mas. The experimental group adopted the double energy scanning, with ball tube A and ball tube B. The reference tube voltage/tube current was 100 kv/ref250 mas and sn150 kv/ref125 mas respectively. The images of the experimental group were non-linear fused to obtain the Mono+ 55 kev single-energy images. The CT value, SNR contrast ratio of the abdominal aorta, renal artery and tumor tissue of the experimental group images and the 100 KV images and the Mono+ 55 kev images of the control group were compared. The objective evaluation and subjective evaluation of the image quality of the three groups of images was performed. Results: The results showed that the 100 kV images of the experimental group were statistically different from those of the control group (P05) in CT value, SNR and CNR (P 0.05). And there was no statistically significant difference between the non-linear fusion single-energy Mono+ 55 kev images and the control group images in CT value, SNR and CNR (P > 0.05). The subjective evaluation of image quality showed that there was no significant difference between Mono+ 55 kev images and control group images, and the quality of Mono+ 55 kev images was higher than that of experimental group 100 kV images. Conclusion: The dual-energy CT non-linear fusion technique can improve the quality of CTA image in patients with renal cancer, and it is possible to obtain high quality CTA images with low iodine concentration contrast agent.展开更多
It is challenging to attempt to obtain CT perfusion (CTP) images of the hyperdense tissues, which could conceal the density of contrast material during perfusion study. We report a new technique of subtraction CTP (SC...It is challenging to attempt to obtain CT perfusion (CTP) images of the hyperdense tissues, which could conceal the density of contrast material during perfusion study. We report a new technique of subtraction CTP (SCTP) to compensate the shortcomings. SCTP post-processed by perfusion software for the data of post-perfusion images subtracting pre-perfusion corresponding images slice by slice in CTP source images is technically feasible without any adverse effects on patients. It provides a new functional imaging with quantitatively hemodynamic indexes of tissue microcirculation and reflects accurately the change of blood flow in tissues and organs.展开更多
目的探讨数字乳腺三维断层融合摄影(Digital Breast Tomosynthesis,DBT)结合二维图像(V-preview)的临床应用价值。方法回顾性分析2016年3月至2020年3月于我院行DBT与全数字化乳腺X线摄影(Full-Field Digital Mammography,FFDM)的患者16...目的探讨数字乳腺三维断层融合摄影(Digital Breast Tomosynthesis,DBT)结合二维图像(V-preview)的临床应用价值。方法回顾性分析2016年3月至2020年3月于我院行DBT与全数字化乳腺X线摄影(Full-Field Digital Mammography,FFDM)的患者160例的临床资料,其中非致密型乳腺腺体患者80例,致密型乳腺腺体患者80例。比较不同乳腺腺体分型下,DBT结合V-preview与DBT结合FFDM两种检查模式的诊断效能及辐射剂量差异。结果非致密型乳腺患者中,两种检查模式的敏感度、特异度、准确度差异无统计学意义(P>0.05),但辐射剂量差异有统计学意义(P<0.001)。在致密型乳腺患者中,两种检查模式的敏感度、特异度和准确度差异无统计学意义(P>0.05),但辐射剂量差异有统计学意义(P<0.001)。结论在不同乳腺腺体分型中,DBT结合V-preview检查模式均可以取得与DBT结合FFDM相同的诊断效能,且辐射剂量更低。DBT结合V-preview可替代DBT结合FFDM检查模式。展开更多
文摘Objective: To explore the significance of dual-energy CT non-linear fusion technique in improving the quality of CTA image of renal cancer. Methods: The CTA images of 100 patients who had been confirmed by pathology as renal cancer were collected and were randomly divided into experimental group and control group with 50 cases respectively. The two groups of patients were treated with iodine concentration of 300 mg/ml and 350 mg/ml non-ionic contrast agent, with a dosage of 1.5 ml/kg and an injection rate of 4 ml/s. The contrast agent intelligently tracking method was adopted bolus. The control group used the conventional CTA scanning, with a reference tube voltage/tube current of 100 kv/ref150 mas. The experimental group adopted the double energy scanning, with ball tube A and ball tube B. The reference tube voltage/tube current was 100 kv/ref250 mas and sn150 kv/ref125 mas respectively. The images of the experimental group were non-linear fused to obtain the Mono+ 55 kev single-energy images. The CT value, SNR contrast ratio of the abdominal aorta, renal artery and tumor tissue of the experimental group images and the 100 KV images and the Mono+ 55 kev images of the control group were compared. The objective evaluation and subjective evaluation of the image quality of the three groups of images was performed. Results: The results showed that the 100 kV images of the experimental group were statistically different from those of the control group (P05) in CT value, SNR and CNR (P 0.05). And there was no statistically significant difference between the non-linear fusion single-energy Mono+ 55 kev images and the control group images in CT value, SNR and CNR (P > 0.05). The subjective evaluation of image quality showed that there was no significant difference between Mono+ 55 kev images and control group images, and the quality of Mono+ 55 kev images was higher than that of experimental group 100 kV images. Conclusion: The dual-energy CT non-linear fusion technique can improve the quality of CTA image in patients with renal cancer, and it is possible to obtain high quality CTA images with low iodine concentration contrast agent.
文摘It is challenging to attempt to obtain CT perfusion (CTP) images of the hyperdense tissues, which could conceal the density of contrast material during perfusion study. We report a new technique of subtraction CTP (SCTP) to compensate the shortcomings. SCTP post-processed by perfusion software for the data of post-perfusion images subtracting pre-perfusion corresponding images slice by slice in CTP source images is technically feasible without any adverse effects on patients. It provides a new functional imaging with quantitatively hemodynamic indexes of tissue microcirculation and reflects accurately the change of blood flow in tissues and organs.
文摘目的探讨数字乳腺三维断层融合摄影(Digital Breast Tomosynthesis,DBT)结合二维图像(V-preview)的临床应用价值。方法回顾性分析2016年3月至2020年3月于我院行DBT与全数字化乳腺X线摄影(Full-Field Digital Mammography,FFDM)的患者160例的临床资料,其中非致密型乳腺腺体患者80例,致密型乳腺腺体患者80例。比较不同乳腺腺体分型下,DBT结合V-preview与DBT结合FFDM两种检查模式的诊断效能及辐射剂量差异。结果非致密型乳腺患者中,两种检查模式的敏感度、特异度、准确度差异无统计学意义(P>0.05),但辐射剂量差异有统计学意义(P<0.001)。在致密型乳腺患者中,两种检查模式的敏感度、特异度和准确度差异无统计学意义(P>0.05),但辐射剂量差异有统计学意义(P<0.001)。结论在不同乳腺腺体分型中,DBT结合V-preview检查模式均可以取得与DBT结合FFDM相同的诊断效能,且辐射剂量更低。DBT结合V-preview可替代DBT结合FFDM检查模式。
