| 王利,邱晓晖,吴志军,等.能谱 CT平扫单能量成像不同能量值对肝脏图像质量影响的初步研究[J].安徽医药,2020,24(10):2038-2041. |
| 能谱 CT平扫单能量成像不同能量值对肝脏图像质量影响的初步研究 |
| Preliminary study on the effect of different energy values on spectral CT plain scanning monochromatic imaging on the quality of hepatic image |
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| DOI：10.3969/j.issn.1009?6469.2020.10.031 |
| 中文关键词: 肝/放射摄影术 能谱 体层摄影术， X线计算机 单能量 |
| 英文关键词: Liver/ radiography Spectral Tomography,X?ray computed Monochromatic |
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| 中文摘要: |
| 目的探讨能谱 CT平扫单能量成像不同能量值对肝脏图像质量的影响，以选择最佳能量值来提高图像质量。方法收集亳州市人民医院 2018年 1月至 2019年 5月期间发现有肝脏病变患者 36例，行腹部 CT平扫和三期增强检查，平扫采用 GSI能谱扫描，分别测量 CT平扫不同 KeV值下病灶与正常肝脏的 CT值、 SD值(分别用 CT病、SD病、CT肝、SD肝表示)计算出 SNR病、 CNR病、SNR肝，并进行统计学分析。结果随着能量值逐渐升高， CT病、SD病、CT肝、SD肝逐渐降低， SNR病、CNR病，、SNR肝逐渐升高，差异有统计学意义(P＜0.001)。在 40 KeV时 CT病、SD病、CT肝、SD肝值［分别为(39.56±26.27)HU、(43.69±12.15)、(78.50± |
| 英文摘要: |
| Objective To investigate the effect of different energy values of single?energy CT scan on hepatic image quality，so as to select the best energy values to improve image quality.Methods Thirty?six patients with liver lesions in Bozhou People’s Hospi? tal from January 2018 to May 2019 were collected.The patients underwent abdominal CT plain scan and three?stage enhancementscan.The CT value and SD value of lesions and normal liver were measured under different energy values on CT plain scan(repre? sented by CTlension，SDlension，CTliver，SDliver，respectively)，the SNRlension，CNRlension and SNRliver were calculated and analyzed statistically. Results With the increase of energy value，CTlension，SDlension，CTliver，SDliver gradually decreased，while SNRlension，CNRlension and SNRliver gradually increased，and the difference was statistically significant(all P＜0.001).At 40KeV，the values of CTlension，SDlension，CTliver， SDliver［(39.56±26.27)HU，(43.69±12.15)，(78.50±9.44)HU、(41.96±11.89)，respectively］were significantly higher than those at 140 keV［(27.07±11.23)HU，(11.09±2.96)，(50.94±7.36)HU，(10.62±2.93)，respectively］.The values of SNRlension，CNRlension，SN? Rliver［(1.07±0.62)，(1.08±0.97)，(2.06±0.83)，respectively］at 40KeV were significantly lower than those at 140 keV［(2.64±1.41)，(2.65±1.84)，(5.32±2.18)，respectively］.At the same time，the subjective image quality score also gradually increased with the increase of energy value(P＜0.001).At 40 keV，the subjective image quality scores of the two doctors［(2.58±0.77)，(2.56±0.73)］ was significantly lower than those at 140 keV［(4.42±0.65)，(4.50±0.61)］ .Conclusion Choosing the appropriate energy value can effectively improve the image quality of abdominal energy spectrum CT plain scan. |
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