全文获取类型
收费全文 | 41783篇 |
免费 | 2438篇 |
国内免费 | 299篇 |
专业分类
耳鼻咽喉 | 391篇 |
儿科学 | 934篇 |
妇产科学 | 830篇 |
基础医学 | 4633篇 |
口腔科学 | 1104篇 |
临床医学 | 3152篇 |
内科学 | 11119篇 |
皮肤病学 | 745篇 |
神经病学 | 3936篇 |
特种医学 | 1583篇 |
外国民族医学 | 3篇 |
外科学 | 7048篇 |
综合类 | 162篇 |
一般理论 | 9篇 |
预防医学 | 1862篇 |
眼科学 | 792篇 |
药学 | 2628篇 |
中国医学 | 84篇 |
肿瘤学 | 3505篇 |
出版年
2023年 | 351篇 |
2022年 | 743篇 |
2021年 | 1348篇 |
2020年 | 755篇 |
2019年 | 1072篇 |
2018年 | 1271篇 |
2017年 | 934篇 |
2016年 | 1128篇 |
2015年 | 1187篇 |
2014年 | 1608篇 |
2013年 | 2004篇 |
2012年 | 3124篇 |
2011年 | 3012篇 |
2010年 | 1737篇 |
2009年 | 1596篇 |
2008年 | 2623篇 |
2007年 | 2520篇 |
2006年 | 2381篇 |
2005年 | 2395篇 |
2004年 | 2220篇 |
2003年 | 1927篇 |
2002年 | 1754篇 |
2001年 | 609篇 |
2000年 | 619篇 |
1999年 | 564篇 |
1998年 | 334篇 |
1997年 | 281篇 |
1996年 | 281篇 |
1995年 | 253篇 |
1994年 | 240篇 |
1993年 | 206篇 |
1992年 | 403篇 |
1991年 | 304篇 |
1990年 | 300篇 |
1989年 | 242篇 |
1988年 | 211篇 |
1987年 | 197篇 |
1986年 | 209篇 |
1985年 | 188篇 |
1984年 | 145篇 |
1983年 | 111篇 |
1982年 | 103篇 |
1981年 | 81篇 |
1980年 | 71篇 |
1979年 | 112篇 |
1978年 | 55篇 |
1974年 | 56篇 |
1973年 | 51篇 |
1972年 | 70篇 |
1971年 | 52篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
991.
992.
Maritza Del Carmen Quezada‐Conde Patricia de Lourdes Alvarez‐Velasco Edisson Fernando Lopez Marco Vinicio Medina Renata Pereira de Samuel Marques Marcia Turolla Wanderley E. Michel-Crosato Claudio Mendes Pannuti Antonio Carlos Frias Daniela Prcida Raggio Fausto Medeiros Mendes 《Dental traumatology》2020,36(5):510-517
993.
994.
Vriz Olga Palatini Paolo Mos Lucio AlSergani Hani Vendramin Igor Livi Ugolino Antonini-Canterin Francesco Magne Julien 《The international journal of cardiovascular imaging》2021,37(5):1659-1668
The International Journal of Cardiovascular Imaging - Aortic valve stenosis (AS) shares similarities with the atherosclerotic process but little is known about the effect of the mechanical... 相似文献
995.
Anna Luisa Kühn Jasmeet Singh Viraj M Moholkar Sudhakar R Satti Katyucia de Macedo Rodrigues Francesco Massari Matthew J Gounis Archie McGowan Ajit S Puri 《Interventional neuroradiology》2021,27(2):241
PurposeTo report use of distal radial artery (dRA) access for carotid artery stenting (CAS) and to discuss procedural setup and technical considerations for a successful intervention.MethodsA retrospective review of our prospective neurointerventional database of CAS was conducted between May 2019 and March 2020. All CAS cases via dRA in the anatomical snuffbox were identified. Patient demographics, clinical information, procedural and radiographic data was collected.Results22 CAS procedures in 20 patients via dRA were identified. Patients’ mean age was 69.4 years (range 53–87 years). 3 patients were female. Mean radial artery diameter was 2.1 mm (range 1.6–2.8 mm). dRA access was achieved in all cases. Conversion to femoral access was required in 2 cases (9.1%) due to persistent radial artery vasospasm resulting in patient discomfort despite multiple additional doses of intraarterial vasodilators and added intravenous sedation as well as tortuous vessel anatomy and limited support of the catheters in a type 3 aortic arch for left CAS.ConclusionOur preliminary experience with dRA access for CAS suggests this approach to be feasible and safe for patients. Technical considerations are important and preprocedural planning is necessary for a successful intervention. Catheter systems and devices specifically designed for radial access are needed to enable more interventionalists to safely perform neurointerventional procedures via wrist access. 相似文献
996.
Gianluca Coppola Antonio Di Renzo Emanuele Tinelli Barbara Petolicchio Vincenzo Parisi Mariano Serrao Camillo Porcaro Marco Fiorelli Francesca Caramia Jean Schoenen Vittorio Di Piero Francesco Pierelli 《The journal of headache and pain》2021,22(1)
BackgroundWe searched for differences in resting-state functional connectivity (FC) between brain networks and its relationship with the microstructure of the thalamus between migraine with pure visual auras (MA), and migraine with complex neurological auras (MA+), i.e. with the addition of at least one of sensory or language symptom.Methods3T MRI data were obtained from 20 patients with MA and 15 with MA + and compared with those from 19 healthy controls (HCs). We collected resting state data among independent component networks. Diffusivity metrics of bilateral thalami were calculated and correlated with resting state ICs-Z-scores.ResultsAs compared to HCs, both patients with MA and MA + disclosed disrupted FC between the default mode network (DMN) and the right dorsal attention system (DAS). The MA + subgroup had lower microstructural metrics than both HCs and the MA subgroup, which correlated negatively with the strength of DMN connectivity. Although the microstructural metrics of MA patients did not differ from those of HCs, these patients lacked the correlation with the strength of DAS connectivity found in HCs.ConclusionsThe present findings suggest that, as far as MRI profiles are concerned, the two clinical phenotypes of migraine with aura have both common and distinct morpho-functional features of nodes in the thalamo-cortical network. 相似文献
997.
998.
999.
Characterization of ferromagnetic or conductive properties of metallic foreign objects embedded within the human body with magnetic iron detector (MID): Screening patients for MRI
下载免费PDF全文
![点击此处可从《Magnetic resonance in medicine》网站下载免费的PDF全文](/ch/ext_images/free.gif)
1000.