【摘要】：目的觀察原始數(shù)據(jù)迭代重建技術(shù)(SAFIRE)與單能譜成像技術(shù)在結(jié)直腸癌雙源CT圖像重建中的聯(lián)合應(yīng)用效果。方法術(shù)前行雙源CT雙能量靜脈期掃描并在術(shù)后經(jīng)病理證實(shí)為結(jié)直腸癌的患者52例,根據(jù)靜脈期圖像重建方法不同分為A、B、C、D組。A組采用濾波反投影(FBP)進(jìn)行圖像重建,B組采用FBP聯(lián)合單能譜成像技術(shù),C組采用SAFIRE,D組采用SAFIRE聯(lián)合單能譜成像技術(shù)。分別測(cè)量4組圖像病灶顯示最佳的3個(gè)層面的病灶、腸周脂肪的CT值及噪聲并求得平均值。計(jì)算信噪比(SNR)和對(duì)比噪比(CNR)。由兩位高年資中級(jí)職稱CT醫(yī)師進(jìn)行圖像主觀評(píng)分;根據(jù)CT圖像評(píng)估T分期并與術(shù)后結(jié)果進(jìn)行對(duì)比,計(jì)算評(píng)估準(zhǔn)確率。結(jié)果 D組CT值高于其余三組,B組CT值高于A組和C組(P均0.01)。A、B、C、D組噪聲依次降低,兩兩相比,P均0.01。D組SNR、CNR及圖像主觀評(píng)分高于其余三組,B組和C組的SNR、CNR、圖像主觀評(píng)分高于A組(P均0.01)。A組根據(jù)CT圖像評(píng)估T14例、T25例、T338例、T45例,評(píng)估準(zhǔn)確率為82.69%;B組分別為3、2、41、6例和84.62%;C組分別為4、1、40、7例和82.69%;D組分別為3、4、38、7例和84.62%。各組T分期準(zhǔn)確率差異無(wú)統(tǒng)計(jì)學(xué)意義。結(jié)論結(jié)直腸癌雙源CT圖像重建中采用SAFIRE和單能譜成像技術(shù)均可以提高靜脈期CT圖像質(zhì)量,兩種技術(shù)聯(lián)用效果更好,但并不能提高對(duì)結(jié)直腸癌T分期的評(píng)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.
【作者單位】： 漯河醫(yī)學(xué)高等�？茖W(xué)校第一附屬醫(yī)院;昆明醫(yī)科大學(xué)第一附屬醫(yī)院;
【分類號(hào)】：R730.44;R735.34

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