全文获取类型
收费全文 | 4570篇 |
免费 | 376篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 82篇 |
妇产科学 | 91篇 |
基础医学 | 790篇 |
口腔科学 | 117篇 |
临床医学 | 381篇 |
内科学 | 792篇 |
皮肤病学 | 65篇 |
神经病学 | 885篇 |
特种医学 | 131篇 |
外科学 | 556篇 |
综合类 | 61篇 |
一般理论 | 1篇 |
预防医学 | 343篇 |
眼科学 | 57篇 |
药学 | 346篇 |
中国医学 | 2篇 |
肿瘤学 | 215篇 |
出版年
2021年 | 48篇 |
2019年 | 44篇 |
2018年 | 78篇 |
2017年 | 56篇 |
2016年 | 86篇 |
2015年 | 80篇 |
2014年 | 113篇 |
2013年 | 137篇 |
2012年 | 207篇 |
2011年 | 216篇 |
2010年 | 112篇 |
2009年 | 111篇 |
2008年 | 179篇 |
2007年 | 197篇 |
2006年 | 169篇 |
2005年 | 179篇 |
2004年 | 129篇 |
2003年 | 135篇 |
2002年 | 147篇 |
2001年 | 137篇 |
2000年 | 151篇 |
1999年 | 117篇 |
1998年 | 59篇 |
1997年 | 44篇 |
1994年 | 45篇 |
1992年 | 85篇 |
1991年 | 87篇 |
1990年 | 90篇 |
1989年 | 72篇 |
1988年 | 82篇 |
1987年 | 68篇 |
1986年 | 75篇 |
1985年 | 70篇 |
1984年 | 55篇 |
1983年 | 63篇 |
1982年 | 52篇 |
1981年 | 45篇 |
1980年 | 49篇 |
1979年 | 76篇 |
1978年 | 62篇 |
1977年 | 59篇 |
1976年 | 51篇 |
1974年 | 57篇 |
1973年 | 53篇 |
1972年 | 58篇 |
1971年 | 55篇 |
1970年 | 44篇 |
1969年 | 43篇 |
1968年 | 48篇 |
1967年 | 41篇 |
排序方式: 共有4948条查询结果,搜索用时 62 毫秒
1.
Moratin Julius Freudlsperger Christian Engel Michael Ristow Oliver Mertens Christian Hoffmann Jürgen 《Best Practice Onkologie》2022,17(6):258-265
best practice onkologie - Die heterogene Gruppe der Kopf-Hals-Tumoren zählt zu den häufigsten malignen Erkrankungen weltweit, wobei ein großer Teil von den Schleimhäuten der... 相似文献
2.
3.
Holger Engel Lingyun Xiong Matthias A. Reichenberger Günter Germann Christian Roth Christoph Hirche 《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2019,13(1):195-200
Several research teams have focused on finding the “ideal” animal model that reflects the pathophysiological changes and closely simulates the metabolic characteristics of patients with type 2 diabetes. However, the multitude of studies on this topic has resulted in large variations, making the models difficult to compare, as the measured parameters vary significantly. Additionally, selecting the appropriate animal model for a new study has become more difficult due to the increasing number of background variables. This article gives a detailed overview of the literature, covering the entire range of animal models and model characteristics, and most importantly, provides guidance for selecting the most suitable model for specific research goals in the future. 相似文献
4.
Nowak Dennis A. Engel Anna Leutbecher Marlene Zeller Christiane 《Journal of neurology》2020,267(1):95-99
Journal of Neurology - Alien limb syndrome following stroke within the territory of the posterior cerebral artery is exceedingly rare. A right-handed female experienced left homonymous hemianopia,... 相似文献
5.
6.
7.
8.
9.
10.
Brian B. Ghoshhajra Ashley M. Lee Leif-Christopher Engel Csilla Celeng Mannudeep K. Kalra Thomas J. Brady Udo Hoffmann Sjirk J. Westra Suhny Abbara 《Pediatric cardiology》2014,35(1):171-179
Cardiac CT angiography (cCTA) has become an established method for the assessment of congenital heart disease. However, the potential harmful effects of ionizing radiation must be considered, particularly in younger, more radiosensitive patients. In this study, we sought to assess the temporal change in radiation doses from pediatric cCTA during an 8-year period at a tertiary medical center. This retrospective study included all patients ≤18 years old who were referred to electrocardiography (ECG)-gated cCTA for the assessment of congenital heart disease or inflammatory disease (Kawasaki disease) from November 2004 to September 2012. During the study period, 95 patients were scanned using 3 different scanner models—64-slice multidetector CT (64-MDCT) and first- (64-DSCT) and second-generation (128-DSCT) dual-source CT—and 3 scan protocols—retrospective ECG-gated helical scanning (RG), prospective ECG-triggered axial scanning (PT), or prospective ECG-triggered high-pitch helical scanning (HPH). Effective dose (ED) was calculated with the dose length product method with a conversion factor (k) adjusted for age. ED was then compared among scan protocols. Image quality was extracted from clinical cCTA reports when available. Overall, 94 % of scans were diagnostic (80 % for 64-slice MDCT, 93 % for 64-slice DSCT, and 97 % for 128-slice DSCT).With 128-DSCT, median ED (1.0 [range 0.6–2.0] mSv) decreased by 85.8 % and 66.8 % compared with 64-MDCT (6.8 [range 2.9–13.6] mSv) and 64-DSCT (2.9 [range 0.9–4.1] mSv), respectively. With HPH, median ED (0.9 [range 0.6–1.8] mSv) decreased by 59.4 % and 85.4 % compared with PT (2.2 [range 0.9–3.4] mSv) and RG (6.1 [range 2.5–10.6] mSv). cCTA can now be obtained at very low radiation doses in pediatric patients using the latest dual-source CT technology in combination with prospective ECG-triggered HPH acquisition. 相似文献