Objective： To detect the activity of tumor cells and tumor blood flow before and after the radiotherapy of implanted pulmonary VX-2 carcinoma in rabbit models by using magnetic resonance diffusion-weighted imaging（M...Objective： To detect the activity of tumor cells and tumor blood flow before and after the radiotherapy of implanted pulmonary VX-2 carcinoma in rabbit models by using magnetic resonance diffusion-weighted imaging（MR-DWI） and magnetic resonance perfusion weighted imaging（MR-PWI）, and to evaluate the effectiveness and safety of the radiotherapy based on the changes in the MR-DWI and MR-PWI parameters at different treatment stages.Methods： A total of 56 rabbit models with implanted pulmonary VX-2 carcinoma were established, and then equally divided into treatment group and control group. MR-DWI and MR-PWI were separately performed using a Philips Acheiva 1.5T MRI machine（Philips, Netherland）. MRI image processing was performed using special perfusion software and the WORKSPACE advanced workstation for MRI. MRDWI was applied for the observation of tumor signals and the measurement of apparent diffusion coefficient（ADC） values; whereas MR-PWI was used for the measurement of wash in rate（WIR）, wash out rate（WOR）, and maximum enhancement rate（MER）. The radiation treatment was performed using Siemens PRIMUS linear accelerator. In the treatment group, the radiotherapy was performed 21 days later on a once weekly dosage of 1,000 c Gy to yield a total dosage of 5,000 c Gy.Results： The ADC parameters in the region of interest on DWI were as follows： on the treatment day for the implanted pulmonary VX-2 carcinoma, the t values at the center and the edge of the lesions were 1.352 and 1.461 in the treatment group and control group（P〉0.05）. During weeks 0-1 after treatment, the t values at the center and the edge of the lesions were 1.336 and 1.137（P〉0.05）. During weeks 1-2, the t values were 1.731 and 1.736（P〈0.05）. During weeks 2-3, the t values were 1.742 and 1.749（P〈0.05）. During weeks 3-4, the t values were 2.050 and 2.127（P〈0.05）. During weeks 4-5, the t values were 2.764 and 2.985（P〈0.05）. The ADC values in the treatment group were significantly higher than in the control group. After the radiotherapy（5,000 c Gy）, the tumors remarkably shrank, along with low signal on DWI, decreased signal on ADC map, and remarkably increased ADC values. As shown on PWI, on the treatment day for the implanted pulmonary VX-2 carcinoma, the t values of the WIR, WOR, and MER at the center of the lesions were 1.05, 1.31, and 1.33 in the treatment group and control group（P〉0.05）; in addition, the t values of the WIR, WOR, and MER at the edge of the lesions were 1.35, 1.07, and 1.51（P〉0.05）. During weeks 0-1 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 1.821, 1.856, and 1.931（P〈0.05）; in addition, the t values of the WIR, WOR, and MER at the edge of the lesions were 1.799, 2.016, and 2.137（P〈0.05）. During weeks 1-1 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.574, 2.156, and 2.059（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 1.869, 2.058, and 2.057（P〈0.05）. During weeks 2-3 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.461, 2.098, and 2.739（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 2.951, 2.625, and 2.154（P〈0.05）. During weeks 3-4 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.584, 2.107, and 2.869（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 2.057, 2.637, and 2.951（P〈0.05）. During weeks 4-5 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.894, 2.827, and 3.285（P〈0.05） and the t values of the WIR, WOR, andMER at the edge of the lesions were 3.45, 3.246, and 3.614（P〈0.05）. After the radiotherapy（500 c Gy）, the tumors shrank on the T1 WI, WIR, WOR, and MER; meanwhile, the PWI parameter gradually decreased and reached its minimum value.Conclusions： MR-DWI and MR-PWI can accurately and directly reflect the inactivation of tumor cells and the tumor hemodynamics in rabbit models with implanted pulmonary VX-2 carcinoma, and thus provide theoretical evidences for judging the clinical effectiveness of radiotherapy for the squamous cell carcinoma of the lung.展开更多
AIM： To investigate apparent diffusion coefficient （ADC） values as an indication of reconditioning of acute hepatic injury （AHI） after allogeneic mononuclear bone marrow cell （MBMC） transplantation. METHODS： T...AIM： To investigate apparent diffusion coefficient （ADC） values as an indication of reconditioning of acute hepatic injury （AHI） after allogeneic mononuclear bone marrow cell （MBMC） transplantation. METHODS： Three groups were used in our study： a cell transplantation group （n = 21）, transplantation control group （n = 21） and normal control group （n = 10）. AHI model rabbits in the cell transplantation group were injected with 5 mL of MBMC suspension at multiple sites in the liver and the transplantation controls were injected with 5 mL D-Hanks solution. At the end of the 1st, 2nd and 4th wk, 7 rabbits were randomly selected from the cell transplantation group and trans- plantation control group for magnetic resonance diffu- sion-weighted imaging （MR-DWI） and measurement of the mean ADC values of injured livers. After MR-DWI examination, the rabbits were sacrificed and the livers subjected to pathological examination. Ten healthy rab- bits from the normal control group were used for MR- DWI examination and measurement of the mean ADC value of normal liver. RESULTS： At all time points, the liver pathological scores from the cell transplantation group were significantly lower than those in the transplantation control group （27.14± 1.46 vs 69.29± 6.16, 22.29 ± 2.29 vs 57.00± 1.53, 19.00 ± 2.31 vs 51.86 ± 6.04, P = 0.000）. The mean ADC values of the cell transplantation group were significantly higher than the transplantation con- trol group （（1.07± 0.07） ×10^-3 mm2/s vs （0.69 ± 0.05） ×10^-3 mm2/s, （1.41± 0.04） ×10^-3 mm2/s vs （0.84± 0.03） ×10^-3 mm2/s, （1.68 ± 0.04） ×10^-3 mm2/s vs （0.86± 0.04） ×10^-3 mm2/s, P = 0.000）. The pathological scores of the cell transplantation group and transplantation control group gradually decreased. However, their mean ADC values gradually increased to near that of the normal control. At the end of the 1st wk, the mean ADC values of the cell transplantation group and transplantation control group were significantly lower than those of the normal control group [（1.07 ± 0.07） ×10^-3 mm2/s vs （± 0.03） ×10^-3 mm2/s, （0.69± 0.05） ×10^-3 mm2/s vs （1.76 ± 0.03） ×10^-3 mm2/s, P = 0.000]. At any 2 time points, the pathological scores and the mean ADC values of the cell transplantation group were significantly different （P = 0.000）. At the end of the 1st wk, the pathological scores and the mean ADC values of the transplantation control group were significantly different from those at the end of the 2nd and 4th wk （P = 0.000）. However, there was no significant difference between the 2nd and 4th wk （P = 0.073 and 0.473, respectively）. The coefficient of correlation between the pathological score and the mean ADC value in the cell transplantation group was -0.883 （P = 0.000） and -0.762 （P = 0.000） in the transplantation control group. CONCLUSION： Tracking the longitudinally dynamic change in the mean ADC value of the AHI liver may reflect hepatic injury reconditioning after allogeneic MBMC transplantation.展开更多
目的对比分析急性缺血性脑卒中(AIS)发病6 h内头颅磁共振(MR)弥散加权成像(DWI)显示为阴性及阳性的患者使用重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓的临床结局和安全性。方法回顾性分析50例AIS患者住院治疗行rt-PA静脉溶栓,根据静脉...目的对比分析急性缺血性脑卒中(AIS)发病6 h内头颅磁共振(MR)弥散加权成像(DWI)显示为阴性及阳性的患者使用重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓的临床结局和安全性。方法回顾性分析50例AIS患者住院治疗行rt-PA静脉溶栓,根据静脉溶栓前MR-DWI检查结果将AIS患者分为DWI阴性组18例和DWI阳性组32例,分析两组患者的人口学特征以及临床资料,包括入院至静脉溶栓时间(DNT)、发病至静脉溶栓时间(OTT),溶栓结束24 h内复查DWI,以发病后90 d的NIHSS评分和改良Rankin量表(mRS)评分作为预后的评估指标。结果两组患者年龄、性别、脑梗死病史、高血压病病史、糖尿病病史、房颤病史、吸烟史、饮酒史、DNT、OTT、颅内出血发生率和病死率比较差异均无统计学意义(均P>0.05);两组患者静脉溶栓前mRS评分及NIHSS评分均高于溶栓后90 d mRS评分及NIHSS评分(均P<0.05),DWI阴性组90 d mRS评分及NIHSS评分低于DWI阳性组(P<0.001,P=0.001)。结论发病6 h内DWI阴性及阳性的AIS患者均可在rt-PA静脉溶栓中获益,DWI阴性组的AIS患者rt-PA静脉溶栓后临床结局优于DWI阳性组,两组的出血转化率及病死率等安全性评价指标差异均无显著性。展开更多
目的探讨联合使用扩散加权成像(DWI)、磁共振波谱成像(MRS)能否提高Kaiser评分对乳腺病变的诊断效能。方法回顾性分析2023年1月至2025年2月于山东大学第八人民医院行乳腺3.0 T MRI平扫及动态对比增强检查、MRS检查的女性患者病例共107例,...目的探讨联合使用扩散加权成像(DWI)、磁共振波谱成像(MRS)能否提高Kaiser评分对乳腺病变的诊断效能。方法回顾性分析2023年1月至2025年2月于山东大学第八人民医院行乳腺3.0 T MRI平扫及动态对比增强检查、MRS检查的女性患者病例共107例,共111个病灶。对每个病灶进行Kaiser评分、表观扩散系数(ADC)值测量、tCho峰判断,以病理为金标准采用应用受试者工作特征(ROC)曲线、Kappa一致性评价对Kaiser评分及Kaiser+ADC+MRS(Kaiser+评分)的诊断效能进行评价,并应用Delong检验对曲线下面积(AUC)进行比较。结果Kaiser评分的AUC为0.938,最佳诊断界值为4分,其敏感性为96.67%(95%CI:88.5%~99.6%)、特异性80.39%(95%CI:66.9%~90.2%);Kaiser+评分AUC为0.969,最佳诊断界值为4分,其敏感性为93.33%(95%CI:83.8%~98.2%)、特异性90.20%(95%CI:78.6%~96.7%);Kaiser+评分的AUC较Kaiser评分提高(P=0.026)。Kappa一致性分析发现Kaiser评分与病理结果的一致性为0.779(95%CI:0.663~0.896),Kaiser+评分与病理结果的一致性为0.837(95%CI:0.663~0.896)。结论联合使用DWI、MRS可以提高Kaiser评分的诊断效能,可以在保证高敏感性的前提下提高诊断的特异性,降低穿刺活检率。展开更多
文摘Objective： To detect the activity of tumor cells and tumor blood flow before and after the radiotherapy of implanted pulmonary VX-2 carcinoma in rabbit models by using magnetic resonance diffusion-weighted imaging（MR-DWI） and magnetic resonance perfusion weighted imaging（MR-PWI）, and to evaluate the effectiveness and safety of the radiotherapy based on the changes in the MR-DWI and MR-PWI parameters at different treatment stages.Methods： A total of 56 rabbit models with implanted pulmonary VX-2 carcinoma were established, and then equally divided into treatment group and control group. MR-DWI and MR-PWI were separately performed using a Philips Acheiva 1.5T MRI machine（Philips, Netherland）. MRI image processing was performed using special perfusion software and the WORKSPACE advanced workstation for MRI. MRDWI was applied for the observation of tumor signals and the measurement of apparent diffusion coefficient（ADC） values; whereas MR-PWI was used for the measurement of wash in rate（WIR）, wash out rate（WOR）, and maximum enhancement rate（MER）. The radiation treatment was performed using Siemens PRIMUS linear accelerator. In the treatment group, the radiotherapy was performed 21 days later on a once weekly dosage of 1,000 c Gy to yield a total dosage of 5,000 c Gy.Results： The ADC parameters in the region of interest on DWI were as follows： on the treatment day for the implanted pulmonary VX-2 carcinoma, the t values at the center and the edge of the lesions were 1.352 and 1.461 in the treatment group and control group（P〉0.05）. During weeks 0-1 after treatment, the t values at the center and the edge of the lesions were 1.336 and 1.137（P〉0.05）. During weeks 1-2, the t values were 1.731 and 1.736（P〈0.05）. During weeks 2-3, the t values were 1.742 and 1.749（P〈0.05）. During weeks 3-4, the t values were 2.050 and 2.127（P〈0.05）. During weeks 4-5, the t values were 2.764 and 2.985（P〈0.05）. The ADC values in the treatment group were significantly higher than in the control group. After the radiotherapy（5,000 c Gy）, the tumors remarkably shrank, along with low signal on DWI, decreased signal on ADC map, and remarkably increased ADC values. As shown on PWI, on the treatment day for the implanted pulmonary VX-2 carcinoma, the t values of the WIR, WOR, and MER at the center of the lesions were 1.05, 1.31, and 1.33 in the treatment group and control group（P〉0.05）; in addition, the t values of the WIR, WOR, and MER at the edge of the lesions were 1.35, 1.07, and 1.51（P〉0.05）. During weeks 0-1 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 1.821, 1.856, and 1.931（P〈0.05）; in addition, the t values of the WIR, WOR, and MER at the edge of the lesions were 1.799, 2.016, and 2.137（P〈0.05）. During weeks 1-1 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.574, 2.156, and 2.059（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 1.869, 2.058, and 2.057（P〈0.05）. During weeks 2-3 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.461, 2.098, and 2.739（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 2.951, 2.625, and 2.154（P〈0.05）. During weeks 3-4 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.584, 2.107, and 2.869（P〈0.05） and the t values of the WIR, WOR, and MER at the edge of the lesions were 2.057, 2.637, and 2.951（P〈0.05）. During weeks 4-5 after treatment, the t values of the WIR, WOR, and MER at the center of the lesions were 2.894, 2.827, and 3.285（P〈0.05） and the t values of the WIR, WOR, andMER at the edge of the lesions were 3.45, 3.246, and 3.614（P〈0.05）. After the radiotherapy（500 c Gy）, the tumors shrank on the T1 WI, WIR, WOR, and MER; meanwhile, the PWI parameter gradually decreased and reached its minimum value.Conclusions： MR-DWI and MR-PWI can accurately and directly reflect the inactivation of tumor cells and the tumor hemodynamics in rabbit models with implanted pulmonary VX-2 carcinoma, and thus provide theoretical evidences for judging the clinical effectiveness of radiotherapy for the squamous cell carcinoma of the lung.
基金Supported by The National Natural Science Foundation of China,No. 30070235,No. 30470508 and No. 30870695The Natural Science Foundation of Hunan Province,No. 06JJ2008,07JJ6040
文摘AIM： To investigate apparent diffusion coefficient （ADC） values as an indication of reconditioning of acute hepatic injury （AHI） after allogeneic mononuclear bone marrow cell （MBMC） transplantation. METHODS： Three groups were used in our study： a cell transplantation group （n = 21）, transplantation control group （n = 21） and normal control group （n = 10）. AHI model rabbits in the cell transplantation group were injected with 5 mL of MBMC suspension at multiple sites in the liver and the transplantation controls were injected with 5 mL D-Hanks solution. At the end of the 1st, 2nd and 4th wk, 7 rabbits were randomly selected from the cell transplantation group and trans- plantation control group for magnetic resonance diffu- sion-weighted imaging （MR-DWI） and measurement of the mean ADC values of injured livers. After MR-DWI examination, the rabbits were sacrificed and the livers subjected to pathological examination. Ten healthy rab- bits from the normal control group were used for MR- DWI examination and measurement of the mean ADC value of normal liver. RESULTS： At all time points, the liver pathological scores from the cell transplantation group were significantly lower than those in the transplantation control group （27.14± 1.46 vs 69.29± 6.16, 22.29 ± 2.29 vs 57.00± 1.53, 19.00 ± 2.31 vs 51.86 ± 6.04, P = 0.000）. The mean ADC values of the cell transplantation group were significantly higher than the transplantation con- trol group （（1.07± 0.07） ×10^-3 mm2/s vs （0.69 ± 0.05） ×10^-3 mm2/s, （1.41± 0.04） ×10^-3 mm2/s vs （0.84± 0.03） ×10^-3 mm2/s, （1.68 ± 0.04） ×10^-3 mm2/s vs （0.86± 0.04） ×10^-3 mm2/s, P = 0.000）. The pathological scores of the cell transplantation group and transplantation control group gradually decreased. However, their mean ADC values gradually increased to near that of the normal control. At the end of the 1st wk, the mean ADC values of the cell transplantation group and transplantation control group were significantly lower than those of the normal control group [（1.07 ± 0.07） ×10^-3 mm2/s vs （± 0.03） ×10^-3 mm2/s, （0.69± 0.05） ×10^-3 mm2/s vs （1.76 ± 0.03） ×10^-3 mm2/s, P = 0.000]. At any 2 time points, the pathological scores and the mean ADC values of the cell transplantation group were significantly different （P = 0.000）. At the end of the 1st wk, the pathological scores and the mean ADC values of the transplantation control group were significantly different from those at the end of the 2nd and 4th wk （P = 0.000）. However, there was no significant difference between the 2nd and 4th wk （P = 0.073 and 0.473, respectively）. The coefficient of correlation between the pathological score and the mean ADC value in the cell transplantation group was -0.883 （P = 0.000） and -0.762 （P = 0.000） in the transplantation control group. CONCLUSION： Tracking the longitudinally dynamic change in the mean ADC value of the AHI liver may reflect hepatic injury reconditioning after allogeneic MBMC transplantation.
文摘目的对比分析急性缺血性脑卒中(AIS)发病6 h内头颅磁共振(MR)弥散加权成像(DWI)显示为阴性及阳性的患者使用重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓的临床结局和安全性。方法回顾性分析50例AIS患者住院治疗行rt-PA静脉溶栓,根据静脉溶栓前MR-DWI检查结果将AIS患者分为DWI阴性组18例和DWI阳性组32例,分析两组患者的人口学特征以及临床资料,包括入院至静脉溶栓时间(DNT)、发病至静脉溶栓时间(OTT),溶栓结束24 h内复查DWI,以发病后90 d的NIHSS评分和改良Rankin量表(mRS)评分作为预后的评估指标。结果两组患者年龄、性别、脑梗死病史、高血压病病史、糖尿病病史、房颤病史、吸烟史、饮酒史、DNT、OTT、颅内出血发生率和病死率比较差异均无统计学意义(均P>0.05);两组患者静脉溶栓前mRS评分及NIHSS评分均高于溶栓后90 d mRS评分及NIHSS评分(均P<0.05),DWI阴性组90 d mRS评分及NIHSS评分低于DWI阳性组(P<0.001,P=0.001)。结论发病6 h内DWI阴性及阳性的AIS患者均可在rt-PA静脉溶栓中获益,DWI阴性组的AIS患者rt-PA静脉溶栓后临床结局优于DWI阳性组,两组的出血转化率及病死率等安全性评价指标差异均无显著性。
文摘目的探讨联合使用扩散加权成像(DWI)、磁共振波谱成像(MRS)能否提高Kaiser评分对乳腺病变的诊断效能。方法回顾性分析2023年1月至2025年2月于山东大学第八人民医院行乳腺3.0 T MRI平扫及动态对比增强检查、MRS检查的女性患者病例共107例,共111个病灶。对每个病灶进行Kaiser评分、表观扩散系数(ADC)值测量、tCho峰判断,以病理为金标准采用应用受试者工作特征(ROC)曲线、Kappa一致性评价对Kaiser评分及Kaiser+ADC+MRS(Kaiser+评分)的诊断效能进行评价,并应用Delong检验对曲线下面积(AUC)进行比较。结果Kaiser评分的AUC为0.938,最佳诊断界值为4分,其敏感性为96.67%(95%CI:88.5%~99.6%)、特异性80.39%(95%CI:66.9%~90.2%);Kaiser+评分AUC为0.969,最佳诊断界值为4分,其敏感性为93.33%(95%CI:83.8%~98.2%)、特异性90.20%(95%CI:78.6%~96.7%);Kaiser+评分的AUC较Kaiser评分提高(P=0.026)。Kappa一致性分析发现Kaiser评分与病理结果的一致性为0.779(95%CI:0.663~0.896),Kaiser+评分与病理结果的一致性为0.837(95%CI:0.663~0.896)。结论联合使用DWI、MRS可以提高Kaiser评分的诊断效能,可以在保证高敏感性的前提下提高诊断的特异性,降低穿刺活检率。
