Study of the Positioning Influence in the Water Activity Measurement during Leak Test of Iodine-125 Seeds

In the prostate cancer treatment, brachytherapy with iodine-125 seeds has been used. lodine-125 seeds are sealed radioactive sources, made by a titanium capsule containing the radioisotope inside. In the final phase of the seeds production, it is necessary to ensure that there is no leakage of the radioactive material. A leakage test is performed, immersing the seeds in water during 24 h and measuring the resulting activity in the water. This measurement is made in a sodium iodide detector. The immersion water is transferred to a plastic tube with a cap. The tube is placed by an automated positioning system, in the detector chamber. This study aims to determine the best positioning of the tube for the detection. It is also important to determine the influence of the positioning variation intrinsic of the automated positioning system during the iodine-125 seeds production. The results obtained will be used as a reference to adjust the equipment and process control system, in the production of the iodine-125 seeds.

Implanting iodine-125 seeds into rat dorsal root ganglion for neuropathic pain: neuronal microdamage without impacting hind limb motion

The use of iodine-125 （L251） in cancer treatment has been shown to relieve patients＇ pain. Consid- ering dorsal root ganglia are critical for neural transmission between the peripheral and central nervous systems, we assumed that 125I could be implanted into rat dorsal root ganglia to provide relief for neuropathic pain. 125I seeds with different radioactivity （0, 14.8, 29.6 MBq） were im- planted separately through L4-5 and L5-6 intervertebral foramen into the vicinity of the L5 dorsal root ganglion, von Frey hair results demonstrated the mechanical pain threshold was elevated after implanting 125I seeds from the high radioactivity group. Transmission electron microscopy revealed that nuclear membrane shrinkage, nucleolar margination, widespread mitochondrial swelling, partial vacuolization, lysosome increase, and partial endoplasmic reticulum dilation were visible at 1,440 hours in the low radioactivity group and at 336 hours in the high radio- activity group. Abundant nuclear membrane shrinkage, partial fuzzy nuclear membrane and endoplasmic reticulum necrosis were observed at 1,440 hours in the high radioactivity group. No significant difference in combined behavioral scores was detected between preoperation and postoperation in the low and high radioactivity groups. These results suggested that the mechan- ical pain threshold was elevated after implanting 125I seeds without influencing motor functions of the hind limb, although cell injury was present.

Iodine-125 seed implantation in the treatment of malignant tumors

Malignant tumors are major causes of morbidity and mortality in China.Despite advances in surgical,radiological,chemotherapeutic,molecular targeting,and immunotherapeutic treatments,patients with malignant tumors still have poor prognoses.Low-dose-rate brachytherapy,specifically 125I seed implantation,is beneficial because of its high local delivery dose and minimal damage to surrounding tissues.Consequently,it has gained increasing acceptance as a treatment modality for various malignant tumors.In this study,we explored the fundamental principles,clinical applications,and new technologies associated with 125I radioactive seed implantation.

Application of radioactive iodine-125 microparticles in hepatocellular carcinoma with portal vein embolus

BACKGROUND Radioactive iodine-125(125I)microparticle therapy is a new type of internal radiation therapy that has shown unique advantages in the treatment of malignant tumors,especially hepatocellular carcinoma.Patients with hepatocellular carcinoma frequently experience portal vein embolism,which exacerbates the difficulty and complexity of treatment.125I particles,used in local radiotherapy,can directly act on tumor tissue and reduce damage to surrounding healthy tissue.Through retrospective analysis,this study discussed the efficacy and safety of radioactive 125I particles in portal vein embolization patients with hepatocellular carcinoma in order to provide more powerful evidence supporting clinical treatment.AIM To investigate the effect of transcatheter arterial chemoembolization combined with portal vein 125I particle implantation in the treatment of primary liver cancer patients with portal vein tumor thrombus and its influence on liver function.METHODS The clinical data of 96 patients with primary liver cancer combined with portal vein tumor thrombus admitted to our hospital between January 2020 and December 2023 were retrospectively analyzed.Fifty-two patients received treatment with transcatheter arterial chemoembolization and implantation of 125I particles in the portal vein(combination group),while 44 patients received treatment with transcatheter arterial chemoembolization alone(control group).The therapeutic effects on tumor lesions,primary liver cancer,and portal vein tumor embolisms were compared between the two groups.Changes in relevant laboratory indexes before and after treatment were evaluated.The t test was used to compare the measurement data between the two groups,and the χ^(2) test was used to compare the counting data between groups.RESULTS The tumor lesion response rate in the combination group(59.62%vs 38.64%)and the response rate of patients with primary liver cancer complicated with portal vein tumor thrombus(80.77%vs 59.09%)were significantly greater than those in the control group(χ^(2)=4.196,5.421;P=0.041,0.020).At 8 wk after surgery,the serum alpha-fetoprotein,portal vein main diameter,and platelet of the combined group were significantly lower than those of the control group,and the serum alanine aminotransferase,aspartate aminotransferase,and total bilirubin were significantly greater than those of the control group(t=3.891,3.291,2.330,3.729,3.582,4.126;P<0.05).The serum aspartate aminotransferase,alanine aminotransferase,and total bilirubin levels of the two groups were significantly greater than those of the same group 8 wk after surgery(P<0.05),and the peripheral blood platelet,alphafetoprotein,and main portal vein diameter were significantly less than those of the same group before surgery(P<0.05).CONCLUSION In patients with primary liver cancer and a thrombus in the portal vein,transcatheter arterial chemoembolization plus portal vein 125I implantation is more effective than transcatheter arterial chemoembolization alone.However,during treatment it is crucial to pay attention to liver function injury caused by transcatheter arterial chemoembolization.

Radical treatment of stage Ⅳ pancreatic cancer by the combination of cryosurgery and iodine-125 seed implantation

AIM:To investigate the therapeutic effect of radical treatment and palliative treatment in stage Ⅳ pancreatic cancer patients.METHODS:81 patients were enrolled in the study.Radical treatment was performed on 51 patients,while 30 patients were put under palliative treatment.The procedural safety and interval survival for stage Ⅳ pancreatic cancer(IS-Ⅳ) was assessed by almost 2.5 years of follow-ups.The IS-Ⅳ of patients under the two kinds of treatment,and the effects of treatment timing and frequency on IS-Ⅳ,were compared.RESULTS:The IS-Ⅳ of patients who received radical treatment was significantly longer than those who received palliative treatment(P < 0.001).The IS-Ⅳ of patients who received delayed radical or palliative treatment was longer than those who received accordingly timely treatment(P = 0.0034 and 0.0415,respectively).Multiple treatments can play an important role in improving the IS-Ⅳ of patients who received radical treatment(P = 0.0389),but not for those who received palliative treatment(P = 0.99).CONCLUSION:The effect of radical treatment was significantly more obvious than that of palliative treatment,and multiple radical treatments may contribute more to patients than a single radical treatment.

Biological effects of low-dose-rate irradiation of pancreatic carcinoma cells in vitro using ^(125)I seeds

AIM:To determine the mechanism of the radiationinduced biological effects of 125I seeds on pancreatic carcinoma cells in vitro.METHODS:SW1990 and PANC-1 pancreatic cancer cell lines were cultured in DMEM in a suitable environment.Gray’s model of iodine-125(125I)seed irradiation was used.In vitro,exponential phase SW1990,and PANC-1cells were exposed to 0,2,4,6,and 8 Gy using 125I radioactive seeds,with an initial dose rate of 12.13c Gy/h.A clonogenic survival experiment was performed to observe the ability of the cells to maintain their clonogenic capacity and to form colonies.Cell-cycle and apoptosis analyses were conducted to detect the apoptosis percentage in the SW1990 and PANC-1 cells.DNA synthesis was measured via a tritiated thymidine(3H-Td R)incorporation experiment.After continuous low-dose-rate irradiation with 125I radioactive seeds,the survival fractions at 2 Gy(SF2),percentage apoptosis,and cell cycle phases of the SW1990 and PANC-1 pancreatic cancer cell lines were calculated and compared.RESULTS:The survival fractions of the PANC-1 andSW1990 cells irradiated with 125I seeds decreased exponentially as the dose increased.No significant difference in SF2 was observed between SW1990 and PANC-1 cells(0.766±0.063 vs 0.729±0.045,P<0.05).The 125I seeds induced a higher percentage of apoptosis than that observed in the control in both the SW1990and PANC-1 cells.The rate of apoptosis increased with increasing radiation dosage.The percentage of apoptosis was slightly higher in the SW1990 cells than in the PANC-1 cells.Dose-dependent G2/M cellcycle arrest was observed after 125I seed irradiation,with a peak value at 6 Gy.As the dose increased,the percentage of G2/M cell cycle arrest increased in both cell lines,whereas the rate of DNA incorporation decreased.In the 3H-Td R incorporation experiment,the dosimetry results of both the SW1990 and PANC-1cells decreased as the radiation dose increased,with a minimum at 6 Gy.There were no significant differences in the dosimetry results of the two cell lines when they were exposed to the same dose of radiation.CONCLUSION:The pancreatic cancer cell-killing effects induced by 125I radioactive seeds mainly occurred via apoptosis and G2/M cell cycle arrest.

Preliminary application of 3D-printed coplanar template for iodine-125 seed implantation therapy in patients with advanced pancreatic cancer

AIM To evaluate a 3 D-printed coplanar template for iodine-125 seed implantation therapy in patients with pancreatic cancer. METHODS A retrospective analysis of our database was performed, and a total of 25 patients with pancreatic cancer who underwent iodine-125 seed implantation between January 2014 and November 2017 were analyzed. Of these, 12 implantations were assisted by a 3 D-printed coplanar template(group A), and 13 implantations performed freehand were selected as a control group(group B). A 3 D coplanar template was designed and printed according to a preoperative CT scan and treatment planning system. The iodine-125 seeds were then implanted using the template as a guide. Dosimetric verification was performed after implantation. Pre-and postoperative D90, V100, and V150 were calculated. The success rate of iodine-125 seed implantation, dosimetric parameters, and complications were analyzed and compared between the two groups.RESULTS Iodine-125 seed implantation was successfully performed in both groups. In group A, the median pre-and postoperative D90 values were 155.32 ± 8.05 Gy and 154.82 ± 16.43 Gy, respectively; the difference between these values was minimal and not statistically significant(P > 0.05). Postoperative V100 and V150 were 91.05% ± 4.06% and 64.54% ± 13.40%, respectively, which met the treatment requirement. A better dosimetric parameter was observed in group A than in group B, and the difference was statistically significant(V100: 91.05% ± 4.06% vs 72.91% ± 13.78%, P < 0.05). No major procedure-related complications were observed in either group. For group A, mild hemorrhage was observed in 1 patient with a peritoneal local hematoma due to mesenteric vein damage from the iodine-125 seed implantation needle. The hematoma resolved spontaneously without treatment. Postoperative blood amylase levels remained within the normal range for all patients.CONCLUSION A 3 D-printed coplanar template appears to be a safe and effective iodine-125 seed implantation guidance tool to improve implantation accuracy and optimize dosimetric distribution.

CT引导下^(125)I粒子植入治疗胃肠道恶性肿瘤腹壁切口转移

目的评估^(125)I粒子植入治疗胃肠道恶性肿瘤腹壁切口转移的有效性和安全性。方法收集2011年1月至2021年12月在苏州大学附属第三医院接受CT引导下^(125)I粒子植入治疗胃肠道恶性肿瘤术后腹壁切口转移患者的临床资料。纳入17例患者,17处病灶接受CT引导下^(125)I粒子植入治疗。治疗计划系统(TPS)进行术前规划,CT引导下^(125)I粒子植入。术后每3个月进行随访,评估病灶局部控制率、治疗相关不良反应及疼痛缓解程度。结果胃肠道恶性肿瘤腹壁切口转移17处病灶均在CT引导下成功植入^(125)I粒子共372粒,平均21.9粒/处,处方剂量100 Gy/处。患者平均生存时间9.8个月。首次治疗后3个月CT扫描结果显示17处病灶中,完全缓解3处,部分缓解6处,病灶稳定7处,进展1处,局部控制率为94.1%。术后第6、12个月局部客观缓解率分别为63.6%、33.3%,疾病控制率分别为100.0%、50.0%。术前8例存在局部疼痛,术后3个月疼痛缓解6例,4例NRS疼痛评分下降≥2分。术后未发生严重并发症。结论CT引导下^(125)I粒子植入治疗胃肠道恶性肿瘤腹壁切口转移安全、有效。

To explore the curative effect of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳprimary hepatocellular carcinoma

Objectives: To explore the clinical efficacy and survival of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳ primary hepatocellular carcinoma.Methods: A retrospective study of 62 patients with primary hepatocellular carcinoma in our hospital from January2017 to December 2018 [60 males, 2 females, age(52.76 ± 10.82) years old], All patients were implanted with Iodine-125 radioactive seeds under CT guidance, followed up regularly after operation to observe the clinical efficacy, including comparison of changes in cancer size before and after treatment, tumor marker AFP, and improvement in complications such as abdominal pain and ascites. Follow-up 3–36 months to assess patient survival.Results: Among the 62 patients, 3 months after Iodine-125 radioactive seed implantation, 5 cases(8.1%) had complete remission of cancer, 33 cases(53.2%) had partial remission, 12 cases(19.4%) had stable lesions, and 12 cases(19.4%) had disease progression. The effective rate was 61.3%. The tumor volume(31.44 ± 14.51 cm3) was significantly smaller than before(50.96 ± 30.13 cm3)(t=5.303, p < 0.05). The tumor marker AFP(69.28 ±50.99) ug/L of 3 months after implantation was significantly lower than that before treatment(90.63 ± 68.58)ug/L(t=3.702, P < 0.05). The average survival time of Iodine-125 seed implantation for stageⅣhepatocellular carcinoma is 11.47 ± 0.85 months, and the median survival time is 9 months. The survival time of the group with better pathological differentiation(grade Ⅰ+ⅡⅠ) was significantly better than that of the group with poor differentiation(grade Ⅲ+Ⅳ)(x2=6.869 p < 0.05). Among the 38 patients with different degrees of abdominal pain,22 patients improved better than before;15 of 28 patients with different degrees of ascites were better than before. All patients had no serious complications related to treatment.Conclusions: Iodine-125 radioactive seed implantation therapy can safely and effectively treat hepatocellular carcinoma, and relieve the clinical symptoms of abdominal pain and ascites.

Implantation of Radioactive ^(125)I Seeds Improves the Prognosis of Locally Advanced Pancreatic Cancer Patients:A Retrospective Study

Locally advanced pancreatic cancer is associated with a very poor prognosis. This study was performed to evaluate whether patients with locally advanced pancreatic cancer benefit from 125 ^I seed implantation. This retrospective study included 224 patients with locally advanced pancreatic cancer, with 137 patients（61.2%） in the implantation（IP） group and 87（38.9%） in the non-implantation（NIP） group. The survival status, complications and objective curative effects were compared between the groups. The average operative time in the IP group was significantly longer than that in the NIP group（243±51 vs. 214±77 min）. The tumor response rates were 9.5% and 0 at the 2nd month after surgery in the IP and NIP groups, respectively（P〈0.05）. The IP group exhibited a trend toward pain relief at the 6th month after surgery. The global health status scores of the IP group were higher than those of the NIP group at the 3rd and 6th month after surgery. The median survival time in the IP group was significantly longer than that in the NIP group. In conclusion, patients with locally advanced pancreatic cancer can benefit from 125 I seed implantation in terms of local tumor control, survival time, pain relief and quality of life.

^(125)I粒子植入在难治性甲状腺癌治疗中的应用价值

作为近距离放射治疗的一种,^(125)I粒子植入已广泛应用于各种不可切除或局部复发的恶性肿瘤治疗中,均展现出良好的治疗效果与前景。由于具有疗效确切、安全微创的特点,^(125)I粒子植入为不能再次手术、^(131)I治疗不可控及不适合靶向治疗的持续或复发甲状腺癌提供了一种可选择的手段。该文将简要介绍^(125)I粒子植入在难治性甲状腺癌局部复发灶及其转移灶治疗和病灶术前定位中的应用。

^(125)I粒子联合动脉灌注化疗对中晚期胰腺癌患者的临床疗效观察

目的评价^(125)I粒子联合动脉灌注化疗(transcatheter arterial infusion,TAI)对中晚期胰腺癌(pancreaticcarcinoma,PC)的临床疗效。方法将符合入组的76例患者采用信封封藏法随机分为观察组、对照组。最终纳入67例,观察组为^(125)I粒子联合TAI(31例),对照组为TAI(36例),治疗3个疗程后比较两组的临床疗效、疼痛评分、梗阻性黄疸(obstructive jaundice,OJ)发生率及生存期。结果观察组客观缓解率(ORR)为48.4%,对照组为25.0%,差异有统计学意义(P<0.05);观察组疾病控制率(DCR)为83.9%,对照组为66.7%,差异无统计学意义(P>0.05)。两组患者术后1、3个月的疼痛评分均较前下降(P<0.05),但观察组疼痛评分下降明显高于对照组(P<0.05)。观察组、对照组疼痛缓解率分别为23.06%、13.4%,差异有统计学意义(P=0.0252);观察组、对照组OJ发生率分别为19.4%、50.0%,差异有统计学意义(P<0.05);观察组、对照组患者中位生存期分别为7.9个月、5.1个月,差异有统计学意义(P<0.05)。两组患者术后1、3个月CA199水平均有所下降,差异有统计学意义(P<0.05)。两组患者恶心呕吐、腹泻和白细胞减少等不良反应发生率比较,差异无统计学意义(P>0.05)。结论^(125)I粒子联合TAI可以有效缓解中晚期PC癌痛,延长生存时间,且安全性良好,值得临床推广。

Percutaneous biliary stent combined with brachytherapy using 125I seeds for treatment of unresectable malignant obstructive jaundice:A meta-analysis

BACKGROUND Malignant obstructive jaundice(MOJ)is a common pathologic manifestation of malignant biliary obstruction.Recently,several clinical trials have explored the clinical effectiveness of intraluminal^(125)I seed-based brachytherapy for MOJ patients,and various outcomes have been reported.AIM To assess the efficacy and safety of percutaneous biliary stents with^(125)I seeds compared to conventional metal stents in patients with unresectable MOJ.METHODS A systematic search of English-language databases(PubMed,Embase,Cochrane Library,and Web of Science)was performed to identify studies published prior to June 2020 that compared stents with or without^(125)I seeds in the treatment of unresectable MOJ.The outcomes analyzed included primary outcomes(stent patency and overall survival)and secondary outcomes(complications and liver function parameters).RESULTS Six randomized controlled trials and four retrospective studies involving 875 patients were eligible for the analysis.Of the 875 included patients,404 were treated with^(125)I seed stents,while 471 were treated with conventional stents.Unadjusted pooled analysis demonstrated that compared to conventional stents,^(125)I seed stents extended the stent patency time[hazard ratio(HR)=0.36,95%confidence interval(CI)=0.28-0.45,P<0.0001]and overall survival period(HR=0.52,95%CI=0.42–0.64,P<0.00001).Subgroup analyses based on the type of^(125)I seed stent and type of study design showed consistent results.However,there were no significant differences in the occurrence of total complications[odds ratio(OR)=1.12,95%CI=0.75-1.67,P=0.57],hemobilia(OR=1.02,95%CI=0.45-2.3,P=0.96),pancreatitis(OR=1.79,95%CI=0.42-7.53,P=0.43),cholangitis(OR=1.13,95%CI=0.60-2.13,P=0.71),or pain(OR=0.67,95%CI=0.22-2,P=0.47).In addition,there were no reductions in the levels of serum indices,including total bilirubin[mean difference(MD)=10.96,95%CI=-3.56-25.49,P=0.14],direct bilirubin(MD=7.37,95%CI=-9.76-24.5,P=0.4),alanine aminotransferase(MD=7.52,95%CI=-0.71-15.74,P=0.07),and aspartate aminotransferase(MD=-4.77,95%CI=-19.98-10.44,P=0.54),after treatment.Publication bias was detected regarding the outcome overall survival;however,the conclusions were not changed after the adjustment.CONCLUSION Placement of stents combined with brachytherapy using^(125)I seeds contributes to a longer stent patency and higher overall survival than placement of conventional stents without extra complications or severe liver damage.Thus,it can be considered an effective and safe treatment for unresectable MOJ.

赋能管理模式在^(125)I粒子植入术后放射防护中的效果研究

目的探讨赋能管理模式在^(125)I粒子植入术后放射防护中的作用。方法选择医院2020年10月至2022年10月首次进行^(125)I粒子植入的患者66例,随机分为对照组和实验组,对照组(n=33)实施传统健康教育;实验组(n=33)在传统健康教育的基础上实施赋能管理模式,评价两组患者在自我效能感、健康教育效果及防护依从性等方面的差异。结果实验组患者在自我效能感、健康教育效果及防护依从性等方面均高于对照组,差异有统计学意义(P<0.05)。结论运用赋能管理模式实施健康教育,能够提高^(125)I粒子植入术后健康教育效果,从而让患者更正确地认识^(125)I粒子治疗,使自我效能感加强,有利于提高术后防护依从性,保护周围人群的安全,值得临床推广。

TACE联合^(125)I粒子植入治疗原发性肝癌伴门静脉癌栓的预后分析

目的评估经动脉化疗栓塞(TACE)联合^(125)I粒子植入治疗原发性肝癌伴门静脉癌栓(PVTT)预后,探索其相关预后因素。方法回顾性分析在2016年1月—2019年12月行TACE联合^(125)I粒子植入治疗的原发性肝癌伴PVTT患者,建立病例资料数据库,对相关因素采用Kaplan-Meier检验进行生存率的单因素分析,Cox风险回归模型多因素分析得出独立预后因子。结果该研究共纳入57例患者,6、12、18和24个月的生存率分别为71.9%、45.6%、23.4%和17.5%,中位生存时间为9.5个月。多因素分析得出4个独立影响因素:肿瘤最大径(HR 2.487,95%CI:1.242~4.978)、PVTT分型(HR 1.886,95%CI:1.177~3.019)、动门脉瘘(HR 5.165,95%CI:2.130~12.525)、PVTT反应率(HR 2.087,95%CI:1.503~2.899),4个因素对生存期的影响差异均有统计学意义(P<0.05)。结论影响TACE联合^(125)I粒子植入治疗原发性肝癌伴PVTT患者的独立预后因子为肿瘤最大径、PVTT分型、动门脉瘘及PVTT反应率。

A case report of iodine-125 seed placement during operation for the treatment of advanced gallbladder carcinoma with septic shock

This case report describes a patient with advanced gallbladder cancer who developed septic shock associated with iodine-125(^(125)I)seed implantation.The treatment process is described to provide a clinical reference for similar cases.A 52-year-old woman with recurrence of advanced gallbladder cancer underwent ^(125)I seed implantation and developed postoperative sepsis with septic shock.The blood culture suggested infection with Aeromonas caviae and Enterococcus faecalis.Vancomycin and imipenem were immediately administered according to the drug sensitivity results,along with immunoglobulin therapy and vasoactive drugs.The patient’s condition gradually stabilized after comprehensive treatment.Sepsis with septic shock is a rare but potentially fatal complication of ^(125)I seed implantation.Timely administration of broad-spectrum antibiotics,immunoglobulin therapy,and vasoactive drugs is very important to stabilize the patient’s condition.Our treatment of this patient can serve as a reference for clinicians to manage this complication in similar cases.

The influence of interstitial brachytherapy with ～(125)I seeds on Caspase-3 and Egr-1 expressions of Lewis lung carcinoma in C57BL mice

Objective:The aim of our study was to explore the influence of interstitial brachytherapy with 125I seeds on Caspase-3 and Egr-1 expressions of Lewis lung carcinoma in C57BL mice.Methods:Model mice of C57BL were planted with Lewis lung cells (LLC) and divided into the treatment group (n=18) and the control group (n=17).In each mouse of the treatment group,two BT-125-1 Model 125I seeds with apparent activity of 9.25 MBq were implanted into the tumor;whereas in each mouse of the control group two dummy seeds were implanted.The mice survival rates of both groups were recorded after 21 days.The tumor weights and dimensions of survived mice were measured,and the tumor volume inhibition rate was calculated.T-test was performed to compare differences of tumor weights and volumes between these two groups.Routine pathological slides of tumor tissue were observed under light microscope.The expression of Caspase-3 was detected by immunohistochemical method and the expression of Egr-1 was detected by RT-PCR method.Results:The survival rates were 88.88% in the treatment group and 70.59% in the control group,the difference had no statistical significance (P > 0.05).The tumor volume inhibition rate was 71.12%.Pathological examination showed degeneration and necrosis of cancer cells at the site nearby the seed in the treated group,but the tumor cells alive were still presented nearby the seed in the control group.The expressions of Caspase-3 and Egr-1 in the treated group were higher than those in the control group (t=12.825,P < 0.01;t=7.039,P < 0.01;respectively).Conclusion:The interstitial brachytherapy with 125I seeds could significantly inhibit the growth of Lewis lung carcinoma of mice.The possible mechanism may be that 125I interstitial brachytherapy can enhance the expressions of Egr-1 and Caspase-3,which could induce tumor cellular apoptosis.

上海市^(125)I粒子植入治疗技术质量控制研究现状

目的:分析探讨2022年上海市开展^(125)I粒子植入治疗技术的各医疗中心质量控制现状。方法:根据上海市核医学质量控制中心^(125)I粒子植入治疗技术评估表,对上海市16家医疗机构的20个相关科室的质量控制数据进行分析。结果:对医疗机构基本要求、人员基本要求、技术管理基本要求评估的36项质控内容中,最高符合率为100.00%(36/36),最低符合率为83.33%(30/36),同一家医院不同科室的管理和质量情况也有所不同;对于有关质控各项指标,植入指征正确率(平均)为98.75%,术前制订治疗计划率(平均)为94.74%,粒子活度复测率(平均)为25.13%,术后放射剂量验证率(平均)为83.81%,30 d内穿刺相关主要并发症发生率(平均)为5.67%,30 d内放射性损伤相关主要并发症发生率(平均)为0.85%,粒子植入治疗有效率(平均)为92.2%,30 d内全因死亡率(平均)为0.87%。2个月、4个月、6个月及1年的(平均)随访率分别为97.24%、91.9%、85.31%及71.91%,2个月、4个月、6个月及1年的(平均)生存率分别为96.81%、89.74%、81.31%及66.07%。结论:2022年上海市各医疗中心在^(125)I粒子植入治疗技术的质量控制中仍存在许多问题,各医疗中心应引起重视,按照上海市核医学质量控制中心^(125)I粒子植入治疗技术评估表的要求,完善科室规章制度,完全按照诊疗规范开展该项技术。

CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的价值

目的探讨计算机断层扫描(CT)引导下放射性^(125)I粒子植入联合肝动脉化疗栓塞(TACE)+射频消融治疗肝包膜下小肝癌的价值。方法选取2020年1月-2022年2月收治的80例肝包膜下小肝癌患者,随机分为观察组和对照组各40例,对照组采用TACE+射频消融术治疗,观察组在对照组的基础上采用CT引导下^(125)I粒子植入治疗,比较两组客观缓解率(ORR)、肝功能[谷丙转氨酶(ALT)、天冬氨酸转氨酶(AST)和总胆红素(TBil)]、血清肿瘤标志物[甲胎蛋白(APF)、癌胚抗原(CEA)]、不良反应以及无进展生存率。结果观察组ORR高于对照组(85.00%vs 62.50%,χ^(2)=5.230,P<0.05);两组ALT、AST、TBil水平比较,差异无统计学意义(P>0.05);治疗后,观察组APF、CEA水平低于对照组(t=7.616;t=8.938,P<0.05);两组不良反应水平比较,差异无统计学意义(P>0.05);观察组1年无进展生存率为80.00%,高于对照组的50.00%(Log Rankχ^(2)=7.487,P<0.05)。结论CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的疗效显著,可有效降低血清肿瘤标志物水平,提高无进展生存率,且安全性较好。

超声引导下放射性^(125)I粒子植入治疗转移性腹膜后去分化脂肪肉瘤1例

去分化脂肪肉瘤(DDLPS)是一种罕见的脂肪肉瘤亚型,预后不良。本病例报告描述了1例65岁中国女性的肝脏及腹膜后DDLPS,临床表现为无痛性腹部肿物。进行计算机断层扫描和超声检查发现瘤体较大且出现部分脏器转移,遂行腹膜后巨大肿瘤切除术及肝部分切除术。术后肿瘤免疫组织化学表现为S-100(+),SOX10(-),Desmin(+)。患者愈合良好,为控制转移病灶,术后三个月行超声引导下右侧腹膜后(肝肾间隙)肿瘤放射性^(125)I粒子植入治疗。通过粒子放射治疗,达到稳定病情的治疗目标。本病例报告对该患者的治疗及病例资料进行分析,从DDLPS的临床诊断、治疗和病理特点等方面对文献进行综述,以期提高诊疗水平。