全文获取类型
收费全文 | 24046篇 |
免费 | 2854篇 |
国内免费 | 547篇 |
专业分类
耳鼻咽喉 | 85篇 |
儿科学 | 458篇 |
妇产科学 | 1230篇 |
基础医学 | 1271篇 |
口腔科学 | 181篇 |
临床医学 | 7489篇 |
内科学 | 3412篇 |
皮肤病学 | 295篇 |
神经病学 | 875篇 |
特种医学 | 1485篇 |
外国民族医学 | 6篇 |
外科学 | 2778篇 |
综合类 | 3914篇 |
预防医学 | 1083篇 |
眼科学 | 431篇 |
药学 | 1061篇 |
46篇 | |
中国医学 | 228篇 |
肿瘤学 | 1119篇 |
出版年
2024年 | 27篇 |
2023年 | 507篇 |
2022年 | 759篇 |
2021年 | 1067篇 |
2020年 | 1458篇 |
2019年 | 1188篇 |
2018年 | 1142篇 |
2017年 | 1228篇 |
2016年 | 1166篇 |
2015年 | 1169篇 |
2014年 | 2043篇 |
2013年 | 1867篇 |
2012年 | 1376篇 |
2011年 | 1492篇 |
2010年 | 1152篇 |
2009年 | 1066篇 |
2008年 | 1122篇 |
2007年 | 1146篇 |
2006年 | 937篇 |
2005年 | 761篇 |
2004年 | 642篇 |
2003年 | 618篇 |
2002年 | 480篇 |
2001年 | 407篇 |
2000年 | 320篇 |
1999年 | 306篇 |
1998年 | 243篇 |
1997年 | 223篇 |
1996年 | 201篇 |
1995年 | 182篇 |
1994年 | 168篇 |
1993年 | 142篇 |
1992年 | 113篇 |
1991年 | 105篇 |
1990年 | 84篇 |
1989年 | 65篇 |
1988年 | 62篇 |
1987年 | 48篇 |
1986年 | 58篇 |
1985年 | 86篇 |
1984年 | 62篇 |
1983年 | 20篇 |
1982年 | 45篇 |
1981年 | 28篇 |
1980年 | 23篇 |
1979年 | 21篇 |
1978年 | 9篇 |
1977年 | 5篇 |
1976年 | 3篇 |
1973年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
55.
《Journal of vascular surgery》2020,71(1):180-188
ObjectiveThree-dimensional ultrasound (3D-US) examination is a relatively new modality that can be used for abdominal aortic aneurysm (AAA) surveillance, and may offer improved reproducibility over conventional two-dimensional ultrasound (2D-US) examination. The aim of this study was to evaluate the interoperator reproducibility of maximum anterior-to-posterior diameter by nonphysician ultrasound technicians in a typical vascular laboratory setting, on patients with infrarenal AAAs using 3D-US and 2D-US examination.MethodsA total of 134 consecutive patients with asymptomatic infrarenal AAAs were screened. Of the 134 patients, 28 (21%) were screen failures. From the remaining 106 patients, 3 (2.8%) had missing data and 13 (12.3%) had technically unacceptable image quality. As a result, 90 patients were included for final analysis. Ultrasound image acquisitions were performed during the single visit. The 2D-US images were evaluated at the time of examination by the respective ultrasound technicians who acquired them. All 3D-US images were evaluated offline by both ultrasound technicians after a wash-out period of at least 6 weeks.ResultsExcellent interoperator reproducibility was observed for measuring maximum diameter using 3D-US (intraclass correlation coefficient, 0.97), and good agreement among ultrasound technicians (mean difference, −0.08 mm; limits of agreement, −3.17; 3.00 mm). When using 3D-US examination, 74 of the 90 patients (82%) were estimated within 2 mm of interoperator variability. Of 90 patients, 52 (58%) were estimated to be within the same variability by 2D-US examination. Estimating AAA diameter using 3D-US was superior to 2D-US with respect to interoperator reproducibility.ConclusionsBoth 3D-US and 2D-US examination demonstrated good reproducibility among two vascular ultrasound technicians with superior agreement from 3D-US examination. The present results support the broader use of 3D-US in standard AAA surveillance programs. 相似文献
56.
《中国现代医生》2020,58(19):119-122+封三
目的 探讨实时超声引导微波消融术治疗子宫腺肌瘤的临床应用。方法 选取2015年1月~2019年1月收入我院子宫腺肌瘤患者37例为研究对象。采用超声造影评价患者的腺肌瘤消融率,常规超声评价瘤体缩小率。采用临床疗效评定标准来评价患者临床症状改善情况。结果 痛经改善率为78.9%(15/19),月经失调改善率为42.9%(9/21),贫血改善率为55.6%(10/18)。超声造影显示仅3例出现消融不完全,消融有效率为91.9%,术后行补充消融治疗,37例局限性子宫腺肌瘤平均消融率均达90%以上。与治疗前比较,治疗后3、6、12个月患者瘤体缩小率分别为60.8%、78.1%、93.1%,差异有统计学意义(P0.05)。与治疗前比较,治疗后临床症状有改善。结论实时超声引导微波消融术治疗子宫腺肌瘤患者,能够减小腺肌瘤体积,且能够明显改善患者临床症状,为子宫肌瘤患者提供新的治疗手段。 相似文献
57.
58.
59.
Nicolás García MD Julio Rosales MD Cristóbal Greene MD Guillermo Droppelmann MSc PhD Marco A. Verdugo MD 《Journal of ultrasound in medicine》2020,39(1):165-168
The aim of this study was to describe a perineural ultrasound-guided infiltration technique for management of radial tunnel syndrome and to report its preliminary results in 54 patients. A mixture of a saline solution, a local anesthetic, and a corticosteroid solution was infiltrated in the perineural region at the arcade of Frohse. Pain was reported in 100% of patients before the procedure versus 1.9% after the procedure. Scratch collapse and Cozen test results were positive in 98.1% and 66.7% of patients before infiltration, respectively, versus 5.6% and 9.2% after infiltration. All variables had statistically significant differences between preprocedure and postprocedure evaluations (P < .01). 相似文献
60.