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31.
目的:比较新辅助直肠(NAR)评分和降期深度评分(DDS)对直肠癌新辅助同期放化疗后疗效的预测。方法:回顾分析2015—2018年间医科院肿瘤医院初治的局部晚期(T 3-T 4和/或N 1-N 2M 0期)、具有疗前MRI资料、接受术前长程同期放化疗(CRT)...  相似文献   
32.
目的 探讨基于深度学习的方法,从疗前MRI中提取放射影像组学特征预测局部晚期直肠癌新辅助放化疗反应的有效性。方法 2016-2017年纳入43例局部晚期直肠癌新辅助同步放化疗患者。均在疗后6~12周接受全系膜直肠切除术。弥散加权成像(DWI)序列MRI在同步放化疗前获得。根据术后病理、影像学检查或肠镜检查评估新辅助治疗后反应,将患者分为治疗反应组(22例)和治疗无反应组(21例)。分别采用传统的计算机辅助诊断方法和预先训练的卷积神经网络,从DWI序列的表观扩散系数图中提取手工和基于深度学习的影像组学(DLR)特征。利用提取的特征建立最小绝对收缩和选择算子Logistic回归模型,预测治疗反应。使用受试者工作特性曲线,通过重复20次分层4倍交叉验证评估模型性能。结果 使用基于DLR构建模型的平均曲线下面积为0.73(标准误为0.58~0.80)。结论 从疗前MRI中基于深度学习方法提取的影像组学特征在预测局部晚期直肠癌患者新辅助治疗反应方面准确度高。  相似文献   
33.
目的 分析原发喉的结外鼻型NK/T细胞淋巴瘤的临床特征及预后。方法 回顾性分析15例原发喉的结外鼻型NK/T细胞淋巴瘤患者的临床资料,利用Kaplan-Meier方法计算其总生存(OS)及疾病无进展生存(PFS),利用单因素分析比较不同临床因素对预后的影响。结果 全组15例患者中,男性13例,中位发病年龄为40岁。8例患者的病变局限在喉内,仅4例存在颈部淋巴结受侵。Ann Abor分期Ⅰ期11例,Ⅱ期3例,Ⅲ期1例。全组患者的中位OS为28.0个月,5年OS为32.0%;中位PFS为24.7个月,5年PFS为33.3%。14例Ⅰ/Ⅱ期患者中,接受放化疗综合治疗的预后显著优于单纯放疗及单纯化疗组(中位OS:37.2 ∶11.2 ∶3.7个月,P=0.004)。结论 原发于喉的结外鼻型NK/T细胞淋巴瘤非常罕见,中年男性为主,一般情况较好,早期病变为多,预后较差。放化疗综合治疗的疗效似乎优于单纯放疗或化疗。  相似文献   
34.
Objective To analyze the acute and late toxicities in patients with prostate cancer trea-ted with hypofractionated intensity-modulated radiotherapy (IMRT). Methods Between June 2006 and June 2008, 37 patients with prostate cancer were treated with hypofractionated IMRT. The clinical target vol-ume (CTV) was the prostate, seminal vesicles and pelvic lymph nodes in 24 patients, the prostate and semi-hal vesicles in 12, and only the tumor bed in 1. The dose per fraction was 2.3 - 2.8 Gy, with 2.7 Gy in 26 patients. The minimal dose was 62.5-75.0 Gy to the prostate and seminal vesicles, and 50 Gy to the pelvic lymph nodes. Results The median follow-up was 14 months. None of the patients experienced grade 4 a-cute gastro-intestinal (GI) toxicity. Grade 1, 2 and 3 acute GI toxicity occurred in 24.3%, 35.1% and 2.7% of the patients, respectively. The rectal V50>27% and V55>20% were highly significantly associat-ed with grade ≥1 acute GI toxicity. Grade 1,2 and 3 acute genitourinary (GU) toxicity occurred in 68%, 0% and 3% of the patients, respectively. The bladder V50> 10% was significantly associated with grade ≥1 acute GU toxicity. The incidence of late GI toxicity was low. No grade ≥3 late GI toxicity was observed. The incidence of late grade 1 and 2 GI toxicity was 24% and 5%, respectively. The rectal V65> 10% was highly significantly associated with grade ≥1 late GI toxicity. No late grade 4 GU toxicity was observed. The incidence of grade 1, 2 and 3 late GU toxicity was 49%, 11% and 3%, respectively. Grade ≥2 late GU toxicity was correlated with V40, V50 and mean dose of the bladder. Conclusions Acute and late toxicity of hypofractionated IMRT is acceptable in patients with prostate cancer.  相似文献   
35.
[目的]观察地塞米松静脉滴注预防国产紫杉特尔导致的化学性静脉炎的临床效果.[方法]2005年7月至2006年2月期间,将使用紫杉特尔化疗的入院病人按照随机数字表随机分为A、B两组A组(应用地塞米松预防紫杉特尔所致的静脉炎)16例;B组(常规使用紫杉特尔化疗)23例.选择2004年7月至2005年7月使用单药顺铂同期化疗的病人作为历史对照组C组(常规单药顺铂化疗)23例.B、C两组采用浅静脉滴注常规化疗.A组在上述的基础上,应用紫杉特尔化疗前后给予生理盐水100 ml 地塞米松5 mg静脉滴注10 min~15 min,同时停止口服紫杉特尔化疗当天常规预处理使用的地塞米松.[结果]对导致静脉炎发生的Logistic回归分析显示组别是影响静脉炎发生的独立因素.A、B、C三组的静脉炎发生率分别为31.2%,82.6%,17%(P<0.05).各组间两两比较,A组的静脉炎发生率明显低于B组(P< 0.05),而和C组比较,则无统计学差异.发生的静脉炎分型比较中得出A组的红肿型、硬结型、坏死型发生率分别为31.3%,6.3%,0%,均低于B组(47.8%,52.2%,43.3%),两组间三型静脉炎的比较,存在统计学差异(P<0.05).[结论]地塞米松静滴能有效减少紫杉特尔所致的化学性静脉炎的发生,减轻静脉炎发生的程度.  相似文献   
36.
目的 探讨乳腺癌改良根治术后内乳电子线大分割照射剂量学特征及急性不良反应、近期疗效。方法 选择2018-2020年收治 155例乳腺癌改良根治术后患者,Ⅲ期 137例(88.4%),Ⅱ期 18例(11.6%)。所有患者均接受规范的化疗、内分泌治疗和抗Her2靶向治疗。按第1、2、3肋间将内乳临床靶体积(CTVim)分为3个亚区(CTVim1、CTVim2、CTVim3),同时勾画锁骨上下区形成计划靶体积(PTVsc)。胸壁CTV和CTVim采用 6~15MeV电子线照射43.5Gy分15次,3周完成。PTVsc采用6MV X线二维放疗或三维放疗43.5Gy分15次,3周完成。评估内乳、PTVsc及肺、心脏、左前降支(LAD)和右冠脉(RA)的剂量学特征,分析急性不良反应、近期疗效。结果 CTVim的 Dmean为(43.3±2.6)Gy,D95%为(30.5±8.3)Gy,V90%为(85.0±10.5)%,V80%为(91.0±7.4)%。CTVim1的相应参数值显著低于CTVim2和CTVim3(均 P<0.001)。体质指数对内乳剂量无影响(P>0.05)。三维放疗比二维放疗技术显著增加CTVim的 Dmean[(43.4±2.6)Gy∶(41.4±2.3)Gy,P=0.021]和PTVsc的热点体积[V110%:(26.7±17.5) cm3∶(12.5±8.4) cm3,P=0.018;V120%:(6.1±5.3) cm3∶(2.0±2.6) cm3,P=0.023]。患肺 Dmean为(9.8±1.9)Gy,V20Gy为(19.7±4.7)%。全组患者心脏 Dmean为(3.3±1.7)Gy,左乳腺癌为(4.7±1.4)Gy,右乳腺癌为(2.6±1.2)Gy。左乳腺癌患者LADDmean为(13.9±4.9)Gy,右乳腺癌患者RADmean为(7.5±3.7)Gy。≥2级急性放射性皮炎、放射性食管炎、放射性肺炎发生率分别为19.3%、4.5%、2.6%。中位随访20.5个月(9.9~41.8个月),2例胸壁复发,2例区域淋巴结复发,6例远处转移,死亡 1例。结论 乳腺癌改良根治术后内乳电子线大分割照射时肺、心、冠脉剂量较低,患者急性不良反应轻且发生率低。但第1肋间的内乳剂量偏低,虽然近期随访疗效较好但需要长期随访。  相似文献   
37.
Objective To analyze the acute and late toxicities in patients with prostate cancer trea-ted with hypofractionated intensity-modulated radiotherapy (IMRT). Methods Between June 2006 and June 2008, 37 patients with prostate cancer were treated with hypofractionated IMRT. The clinical target vol-ume (CTV) was the prostate, seminal vesicles and pelvic lymph nodes in 24 patients, the prostate and semi-hal vesicles in 12, and only the tumor bed in 1. The dose per fraction was 2.3 - 2.8 Gy, with 2.7 Gy in 26 patients. The minimal dose was 62.5-75.0 Gy to the prostate and seminal vesicles, and 50 Gy to the pelvic lymph nodes. Results The median follow-up was 14 months. None of the patients experienced grade 4 a-cute gastro-intestinal (GI) toxicity. Grade 1, 2 and 3 acute GI toxicity occurred in 24.3%, 35.1% and 2.7% of the patients, respectively. The rectal V50>27% and V55>20% were highly significantly associat-ed with grade ≥1 acute GI toxicity. Grade 1,2 and 3 acute genitourinary (GU) toxicity occurred in 68%, 0% and 3% of the patients, respectively. The bladder V50> 10% was significantly associated with grade ≥1 acute GU toxicity. The incidence of late GI toxicity was low. No grade ≥3 late GI toxicity was observed. The incidence of late grade 1 and 2 GI toxicity was 24% and 5%, respectively. The rectal V65> 10% was highly significantly associated with grade ≥1 late GI toxicity. No late grade 4 GU toxicity was observed. The incidence of grade 1, 2 and 3 late GU toxicity was 49%, 11% and 3%, respectively. Grade ≥2 late GU toxicity was correlated with V40, V50 and mean dose of the bladder. Conclusions Acute and late toxicity of hypofractionated IMRT is acceptable in patients with prostate cancer.  相似文献   
38.
Objective To analyze the acute and late toxicities in patients with prostate cancer trea-ted with hypofractionated intensity-modulated radiotherapy (IMRT). Methods Between June 2006 and June 2008, 37 patients with prostate cancer were treated with hypofractionated IMRT. The clinical target vol-ume (CTV) was the prostate, seminal vesicles and pelvic lymph nodes in 24 patients, the prostate and semi-hal vesicles in 12, and only the tumor bed in 1. The dose per fraction was 2.3 - 2.8 Gy, with 2.7 Gy in 26 patients. The minimal dose was 62.5-75.0 Gy to the prostate and seminal vesicles, and 50 Gy to the pelvic lymph nodes. Results The median follow-up was 14 months. None of the patients experienced grade 4 a-cute gastro-intestinal (GI) toxicity. Grade 1, 2 and 3 acute GI toxicity occurred in 24.3%, 35.1% and 2.7% of the patients, respectively. The rectal V50>27% and V55>20% were highly significantly associat-ed with grade ≥1 acute GI toxicity. Grade 1,2 and 3 acute genitourinary (GU) toxicity occurred in 68%, 0% and 3% of the patients, respectively. The bladder V50> 10% was significantly associated with grade ≥1 acute GU toxicity. The incidence of late GI toxicity was low. No grade ≥3 late GI toxicity was observed. The incidence of late grade 1 and 2 GI toxicity was 24% and 5%, respectively. The rectal V65> 10% was highly significantly associated with grade ≥1 late GI toxicity. No late grade 4 GU toxicity was observed. The incidence of grade 1, 2 and 3 late GU toxicity was 49%, 11% and 3%, respectively. Grade ≥2 late GU toxicity was correlated with V40, V50 and mean dose of the bladder. Conclusions Acute and late toxicity of hypofractionated IMRT is acceptable in patients with prostate cancer.  相似文献   
39.
Objective To analyze the acute and late toxicities in patients with prostate cancer trea-ted with hypofractionated intensity-modulated radiotherapy (IMRT). Methods Between June 2006 and June 2008, 37 patients with prostate cancer were treated with hypofractionated IMRT. The clinical target vol-ume (CTV) was the prostate, seminal vesicles and pelvic lymph nodes in 24 patients, the prostate and semi-hal vesicles in 12, and only the tumor bed in 1. The dose per fraction was 2.3 - 2.8 Gy, with 2.7 Gy in 26 patients. The minimal dose was 62.5-75.0 Gy to the prostate and seminal vesicles, and 50 Gy to the pelvic lymph nodes. Results The median follow-up was 14 months. None of the patients experienced grade 4 a-cute gastro-intestinal (GI) toxicity. Grade 1, 2 and 3 acute GI toxicity occurred in 24.3%, 35.1% and 2.7% of the patients, respectively. The rectal V50>27% and V55>20% were highly significantly associat-ed with grade ≥1 acute GI toxicity. Grade 1,2 and 3 acute genitourinary (GU) toxicity occurred in 68%, 0% and 3% of the patients, respectively. The bladder V50> 10% was significantly associated with grade ≥1 acute GU toxicity. The incidence of late GI toxicity was low. No grade ≥3 late GI toxicity was observed. The incidence of late grade 1 and 2 GI toxicity was 24% and 5%, respectively. The rectal V65> 10% was highly significantly associated with grade ≥1 late GI toxicity. No late grade 4 GU toxicity was observed. The incidence of grade 1, 2 and 3 late GU toxicity was 49%, 11% and 3%, respectively. Grade ≥2 late GU toxicity was correlated with V40, V50 and mean dose of the bladder. Conclusions Acute and late toxicity of hypofractionated IMRT is acceptable in patients with prostate cancer.  相似文献   
40.
Objective To analyze the acute and late toxicities in patients with prostate cancer trea-ted with hypofractionated intensity-modulated radiotherapy (IMRT). Methods Between June 2006 and June 2008, 37 patients with prostate cancer were treated with hypofractionated IMRT. The clinical target vol-ume (CTV) was the prostate, seminal vesicles and pelvic lymph nodes in 24 patients, the prostate and semi-hal vesicles in 12, and only the tumor bed in 1. The dose per fraction was 2.3 - 2.8 Gy, with 2.7 Gy in 26 patients. The minimal dose was 62.5-75.0 Gy to the prostate and seminal vesicles, and 50 Gy to the pelvic lymph nodes. Results The median follow-up was 14 months. None of the patients experienced grade 4 a-cute gastro-intestinal (GI) toxicity. Grade 1, 2 and 3 acute GI toxicity occurred in 24.3%, 35.1% and 2.7% of the patients, respectively. The rectal V50>27% and V55>20% were highly significantly associat-ed with grade ≥1 acute GI toxicity. Grade 1,2 and 3 acute genitourinary (GU) toxicity occurred in 68%, 0% and 3% of the patients, respectively. The bladder V50> 10% was significantly associated with grade ≥1 acute GU toxicity. The incidence of late GI toxicity was low. No grade ≥3 late GI toxicity was observed. The incidence of late grade 1 and 2 GI toxicity was 24% and 5%, respectively. The rectal V65> 10% was highly significantly associated with grade ≥1 late GI toxicity. No late grade 4 GU toxicity was observed. The incidence of grade 1, 2 and 3 late GU toxicity was 49%, 11% and 3%, respectively. Grade ≥2 late GU toxicity was correlated with V40, V50 and mean dose of the bladder. Conclusions Acute and late toxicity of hypofractionated IMRT is acceptable in patients with prostate cancer.  相似文献   
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