全文获取类型
收费全文 | 1625篇 |
免费 | 104篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 83篇 |
妇产科学 | 41篇 |
基础医学 | 183篇 |
口腔科学 | 46篇 |
临床医学 | 132篇 |
内科学 | 340篇 |
皮肤病学 | 27篇 |
神经病学 | 50篇 |
特种医学 | 428篇 |
外科学 | 175篇 |
综合类 | 43篇 |
预防医学 | 39篇 |
眼科学 | 8篇 |
药学 | 62篇 |
1篇 | |
中国医学 | 1篇 |
肿瘤学 | 58篇 |
出版年
2024年 | 2篇 |
2023年 | 5篇 |
2022年 | 4篇 |
2021年 | 16篇 |
2020年 | 12篇 |
2019年 | 10篇 |
2018年 | 12篇 |
2017年 | 23篇 |
2016年 | 18篇 |
2015年 | 21篇 |
2014年 | 38篇 |
2013年 | 49篇 |
2012年 | 37篇 |
2011年 | 48篇 |
2010年 | 51篇 |
2009年 | 61篇 |
2008年 | 37篇 |
2007年 | 48篇 |
2006年 | 42篇 |
2005年 | 33篇 |
2004年 | 27篇 |
2003年 | 29篇 |
2002年 | 22篇 |
2001年 | 24篇 |
2000年 | 23篇 |
1999年 | 26篇 |
1998年 | 80篇 |
1997年 | 85篇 |
1996年 | 85篇 |
1995年 | 66篇 |
1994年 | 44篇 |
1993年 | 62篇 |
1992年 | 12篇 |
1991年 | 15篇 |
1990年 | 30篇 |
1989年 | 56篇 |
1988年 | 51篇 |
1987年 | 50篇 |
1986年 | 54篇 |
1985年 | 69篇 |
1984年 | 36篇 |
1983年 | 29篇 |
1982年 | 28篇 |
1981年 | 31篇 |
1980年 | 38篇 |
1979年 | 7篇 |
1978年 | 18篇 |
1977年 | 23篇 |
1976年 | 21篇 |
1975年 | 20篇 |
排序方式: 共有1733条查询结果,搜索用时 15 毫秒
91.
Multiple myeloma: evaluation by CT 总被引:3,自引:0,他引:3
Although patients who have multiple myeloma usually have straightforward clinical symptoms and corroborative radiographs, in some instances, these patients will present atypically, with symptoms suggesting active disease but radiographs that are normal or nonspecific. We reviewed the records of 32 patients who had documented multiple myeloma and had undergone CT examinations, assessing the value of those examinations. Although CT is not indicated in all patients who have multiple myeloma, it is especially useful in patients who have bone pain and normal or nonspecific radiographs. CT provided confirmatory information in all cases in which lesions were seen on radiographs. CT also frequently demonstrated a greater extent of disease than could be appreciated on the radiographs. 相似文献
92.
Insufficiency fractures in the supraacetabular region were identified in five women, aged 55-83 years. Factors contributing to the diminished resistance of their bones included postmenopausal osteoporosis, steroid therapy, radiation therapy, and rheumatoid arthritis. The supraacetabular fractures were seen on routine radiographs as hazy bands of sclerosis located immediately above and parallel to the acetabular roof. All five patients had additional fractures in the spine or pelvis. Supraacetabular insufficiency fractures may be an unsuspected cause of hip pain, especially in older women. 相似文献
93.
94.
Dendrimer-enhanced MRI as a diagnostic and prognostic biomarker of sepsis-induced acute renal failure in aged mice 总被引:1,自引:0,他引:1
Dear JW Kobayashi H Jo SK Holly MK Hu X Yuen PS Brechbiel MW Star RA 《Kidney international》2005,67(6):2159-2167
BACKGROUND: Acute renal failure (ARF) induced by sepsis has a high mortality. In an aged mouse model of sepsis-induced ARF we have previously shown that renal injury occurs before serum creatinine is elevated. Development of a noninvasive biomarker that could diagnose renal dysfunction early in sepsis and monitor the response to therapy would be very valuable. METHODS: We performed magnetic resonance imaging (MRI) with gadolinium-based G4 dendrimer intravenous contrast in a fluid- and antibiotic-treated cecal ligation and puncture (CLP) sepsis model in aged mice. Imaging was also performed in a mouse volume depletion model and in models of ARF induced by ischemia/reperfusion (I/R) and cisplatin. RESULTS: Twenty hours post-CLP, aged mice had a distinct pattern of renal injury using dendrimer-enhanced MRI. This pattern was different from renal injury induced by either cisplatin or I/R. Prerenal azotemia induced by volume depletion was distinguished from sepsis by dendrimer-enhanced MRI. Dendrimer-enhanced MRI detected renal dysfunction 6 hours post-CLP, a time when serum creatinine was still normal. Ethyl pyruvate reversed the renal dysfunction detected by dendrimer-enhanced MRI at 20 hours, but not at 6 hours post-CLP. The appearance of renal dysfunction on dendrimer-enhanced MRI at 6 hours post-CLP predicted the length of survival. CONCLUSION: Dendrimer-enhanced MRI is a novel biomarker that provides information for the early diagnosis, drug responsiveness, and prognosis of sepsis-induced ARF. 相似文献
95.
96.
97.
98.
99.
A number of surgical clips and other metallic materials embedded within patients have ferromagnetic properties that present a potential hazard when in the strong fields associated with magnetic resonance imaging. Several types of magnetometers and metal detectors were investigated as possible pre-imaging screening devices. The sensitivities and costs of these devices are given. 相似文献
100.