原始数据迭代重建技术与单能谱成像技术在结直肠癌CT图像重建中联合应用效果
发布时间：2019-08-13 12:16
【摘要】：目的观察原始数据迭代重建技术(SAFIRE)与单能谱成像技术在结直肠癌双源CT图像重建中的联合应用效果。方法术前行双源CT双能量静脉期扫描并在术后经病理证实为结直肠癌的患者52例,根据静脉期图像重建方法不同分为A、B、C、D组。A组采用滤波反投影(FBP)进行图像重建,B组采用FBP联合单能谱成像技术,C组采用SAFIRE,D组采用SAFIRE联合单能谱成像技术。分别测量4组图像病灶显示最佳的3个层面的病灶、肠周脂肪的CT值及噪声并求得平均值。计算信噪比(SNR)和对比噪比(CNR)。由两位高年资中级职称CT医师进行图像主观评分;根据CT图像评估T分期并与术后结果进行对比,计算评估准确率。结果 D组CT值高于其余三组,B组CT值高于A组和C组(P均0.01)。A、B、C、D组噪声依次降低,两两相比,P均0.01。D组SNR、CNR及图像主观评分高于其余三组,B组和C组的SNR、CNR、图像主观评分高于A组(P均0.01)。A组根据CT图像评估T14例、T25例、T338例、T45例,评估准确率为82.69%;B组分别为3、2、41、6例和84.62%;C组分别为4、1、40、7例和82.69%;D组分别为3、4、38、7例和84.62%。各组T分期准确率差异无统计学意义。结论结直肠癌双源CT图像重建中采用SAFIRE和单能谱成像技术均可以提高静脉期CT图像质量,两种技术联用效果更好,但并不能提高对结直肠癌T分期的评估效能。
[Abstract]:Objective to observe the effect of iterative reconstruction of raw data (SAFIRE) and single energy spectrum imaging in dual source CT image reconstruction of colorectal cancer. Methods 52 patients with colorectal cancer confirmed by pathology before operation were divided into two groups according to the reconstruction methods of venous phase image. Group A was treated with filtered backprojection (FBP), group B was treated with FBP combined with single energy spectrum imaging technique, and group C was treated with SAFIRE combined with single energy spectrum imaging technique. The CT value and noise of peri-intestinal fat were measured and the average value was obtained by measuring the CT value and noise of the four groups of lesions showing the best three levels of lesions and periintestinal fat. Calculation of signal-to-noise ratio (SNR) (SNR) and contrast-to-noise ratio (CNR).) The subjective image score was carried out by two senior and intermediate title CT doctors, and the evaluation accuracy was calculated by evaluating T stage according to CT image and comparing it with the postoperative results. Results the CT value of group D was higher than that of the other three groups, and the CT value of group B was higher than that of group A and group C (P 0.01). The noise in group A, B, C and group D decreased in turn. Compared with the other three groups, the subjective score of SNR,CNR and image in group D and group C was higher than that in group A (P 0.01). A group evaluated T14 cases, T25 cases, T338 cases, T45 cases according to CT images. The accuracy of evaluation was 82.69%. In group B, 3, 2, 41, 6 cases and 84.62% group C were 4, 1, 40, 7 and 82.69%, respectively, and those in group D were 3, 4, 38, 7 and 84. 62%, respectively. the results were as follows: 3, 2, 41, 6 and 84. 62% in group C, 3, 4, 38, 7 and 84. 62%, respectively. There was no significant difference in the accuracy of T staging in each group. Conclusion both SAFIRE and single energy spectrum imaging can improve the quality of venous CT images in colorectal cancer dual-source CT image reconstruction, and the combination of the two techniques is better, but it can not improve the evaluation efficiency of T staging of colorectal cancer.
【作者单位】： 漯河医学高等专科学校第一附属医院;昆明医科大学第一附属医院;
【分类号】：R730.44;R735.34
[Abstract]:Objective to observe the effect of iterative reconstruction of raw data (SAFIRE) and single energy spectrum imaging in dual source CT image reconstruction of colorectal cancer. Methods 52 patients with colorectal cancer confirmed by pathology before operation were divided into two groups according to the reconstruction methods of venous phase image. Group A was treated with filtered backprojection (FBP), group B was treated with FBP combined with single energy spectrum imaging technique, and group C was treated with SAFIRE combined with single energy spectrum imaging technique. The CT value and noise of peri-intestinal fat were measured and the average value was obtained by measuring the CT value and noise of the four groups of lesions showing the best three levels of lesions and periintestinal fat. Calculation of signal-to-noise ratio (SNR) (SNR) and contrast-to-noise ratio (CNR).) The subjective image score was carried out by two senior and intermediate title CT doctors, and the evaluation accuracy was calculated by evaluating T stage according to CT image and comparing it with the postoperative results. Results the CT value of group D was higher than that of the other three groups, and the CT value of group B was higher than that of group A and group C (P 0.01). The noise in group A, B, C and group D decreased in turn. Compared with the other three groups, the subjective score of SNR,CNR and image in group D and group C was higher than that in group A (P 0.01). A group evaluated T14 cases, T25 cases, T338 cases, T45 cases according to CT images. The accuracy of evaluation was 82.69%. In group B, 3, 2, 41, 6 cases and 84.62% group C were 4, 1, 40, 7 and 82.69%, respectively, and those in group D were 3, 4, 38, 7 and 84. 62%, respectively. the results were as follows: 3, 2, 41, 6 and 84. 62% in group C, 3, 4, 38, 7 and 84. 62%, respectively. There was no significant difference in the accuracy of T staging in each group. Conclusion both SAFIRE and single energy spectrum imaging can improve the quality of venous CT images in colorectal cancer dual-source CT image reconstruction, and the combination of the two techniques is better, but it can not improve the evaluation efficiency of T staging of colorectal cancer.
【作者单位】： 漯河医学高等专科学校第一附属医院;昆明医科大学第一附属医院;
【分类号】：R730.44;R735.34
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