全文获取类型
收费全文 | 807篇 |
免费 | 57篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 8篇 |
妇产科学 | 30篇 |
基础医学 | 91篇 |
口腔科学 | 45篇 |
临床医学 | 71篇 |
内科学 | 119篇 |
皮肤病学 | 4篇 |
神经病学 | 122篇 |
特种医学 | 91篇 |
外科学 | 152篇 |
综合类 | 9篇 |
预防医学 | 35篇 |
眼科学 | 1篇 |
药学 | 45篇 |
肿瘤学 | 35篇 |
出版年
2022年 | 4篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 25篇 |
2018年 | 21篇 |
2017年 | 13篇 |
2016年 | 14篇 |
2015年 | 13篇 |
2014年 | 21篇 |
2013年 | 46篇 |
2012年 | 48篇 |
2011年 | 43篇 |
2010年 | 32篇 |
2009年 | 38篇 |
2008年 | 37篇 |
2007年 | 45篇 |
2006年 | 52篇 |
2005年 | 25篇 |
2004年 | 39篇 |
2003年 | 31篇 |
2002年 | 24篇 |
2001年 | 23篇 |
2000年 | 13篇 |
1999年 | 10篇 |
1997年 | 5篇 |
1996年 | 5篇 |
1995年 | 7篇 |
1994年 | 4篇 |
1993年 | 9篇 |
1992年 | 11篇 |
1991年 | 11篇 |
1990年 | 10篇 |
1989年 | 12篇 |
1988年 | 8篇 |
1987年 | 17篇 |
1986年 | 12篇 |
1985年 | 13篇 |
1984年 | 8篇 |
1983年 | 10篇 |
1982年 | 4篇 |
1981年 | 6篇 |
1979年 | 5篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 5篇 |
1971年 | 4篇 |
1968年 | 3篇 |
1967年 | 5篇 |
1964年 | 5篇 |
1939年 | 3篇 |
排序方式: 共有864条查询结果,搜索用时 15 毫秒
1.
2.
Image fusion of bone SPECT and CT - a specific diagnostic method in oral and maxillofacial surgery] 总被引:1,自引:0,他引:1
Denys John Loeffelbein Marco Rainer Kesting Eckhart Mielke Margot Jonas Frank H?lzle Klaus-Dietrich Wolff 《Mund-, Kiefer- und Gesichtschirurgie》2007,11(1):33-41
OBJECTIVE: The aim of this study was to evaluate the benefit of image fusion of CT (computertomography) and bone SPECT (single photon emission computed tomography) in diagnosis of head and neck cancer. METHODS AND PATIENTS: Computer based image fusion has been applied in 39 patients with suspected cancer in the oromaxillofacial region following CT and SPECT without any further hazard for the patients. Afterwards image fusion was set in comparision to simultaneously evaluation of CT and SPECT and histological findings. RESULTS: In 5 out of 39 patients SPECT/CT image fusion obtained more precise anatomical findings in tumour expansion than simultaneously evaluation of CT and SPECT. CONCLUSION: For planning of surgical and radiation therapy of oral and maxillofacial cancer, image fusion of CT/SPECT provides efficient and plastical diagnostic imaging. Particularly in complex anatomical regions like maxilla or base of the skull image fusion could be an additional device, if simultaneous evaluation of CT and SPECT is not clear. 相似文献
3.
Combined percutaneous antegrade and cystoscopic retrograde approach in the treatment of distal ureteric fistulae 总被引:1,自引:1,他引:0
Thierry de Baere Alain Roche Christine Lagrange Alban Denys Bernard Court Joël Isapoff Paris Pappas 《Cardiovascular and interventional radiology》1995,18(6):349-352
Purpose To determine the efficacy of a cystoscopic approach, as definitive treatment of ureteral fistulae, after failure of antegrade ureteral stent insertion.Methods Of 43 ureter fistulae encountered over 4 years, 10 postoperative and/or postradiotherapy fistulae could not be stented via an antegrade approach alone. A cystoscopic approach was used, with the antegrade approach available as back-up, if necessary.Results In two patients the ureteral orifice could not be visualized cystoscopically, thus precluding the retrograde approach. In the eight remaining patients, the retrograde approach alone never allowed successful stenting. In six patients, combined antegrade and retrograde approaches permitted stent insertions. In three of those six patients, a complex catheterization procedure was necessary. In two patients the combined approach failed altogether. Therefore, 6 of 10 patients underwent a successful stenting procedure with the combined approach; all ultimately closed the fistula.Conclusion Antegrade stent insertion remains the treatment of choice for ureteral leaks. If the antegrade approach fails, the retrograde approach alone is not likely to be successful. Instead, a combination of both approaches often does succeed. 相似文献
4.
5.
6.
7.
The purpose of this study was to determine the prevalence and localization of focal areas of sparing in a population of patients with fatty infiltration (steatosis) of the liver. We also sought to determine if the blood supply of the gallbladder has an effect on fatty infiltration of the liver adjacent to it. We studied 290 patients with sonographic signs of fatty infiltration of the liver with gray scale sonography. In 58 of the patients, the gallbladder had been removed previously. A zone of focal sparing was found in 67% of patients with liver steatosis (78% in patients with an intact gallbladder versus 33% in patients with previous cholecystectomy). In patients with an intact gallbladder, segments 4 and 5 were spared most often. These segments were rarely spared in patients with previous cholecystectomy. Other sites of focal sparing were observed with the same frequency in the two groups. We conclude that focal sparing occurs frequently in patients with liver steatosis, especially in segments 4 and 5. When the gallbladder is absent, areas of focal sparing are less frequent, and they rarely involve segments 4 and 5. This suggests that the blood supply of the gallbladder plays a role in the distribution of the fat in the adjacent liver. Focal sparing might serve as an additional sign in the diagnosis of steatosis of the liver, especially in patients with an intact gallbladder. 相似文献
8.
J Bia?ek A Denys M Kowalska T Szyd?owska 《Archivum immunologiae et therapiae experimentalis》1985,33(6):735-739
The influence of ISO, the antiviral drug of immunomodulating activity, on the course of experimental influenza infections and mixed, viral-bacterial infections was studied. Spleen leukocytes migration inhibition test, performed in vitro in the presence of specific antigens stimulating influence of the drug administered to the infected animals was observed. 相似文献
9.
J Bia?ek A Denys M Kowalska I Ciebiada T Szyd?owska 《Archivum immunologiae et therapiae experimentalis》1989,37(3-4):421-430
This paper is the continuation of earlier studies on the effect of the killed suspension of Corynebacterium parvum in influenza virus infected mice. Our investigation showed the normalized effect of these drugs on disturbed function of cell mediated immunity during experimental influenza infection especially in phagocytic and bactericidal activity of granulocytes. The present experiments concern the explanation of these infection mechanisms. Intraperitoneal injection of Corynebacterium parvum stimulated spleen index. Foot pad test is higher than in comparatively treated BCG group. The pathomorphological analysis of the spleen, thymus and peritoneal lymph nodes points out to the multiplication of multiple lymph nodes sinus cells. Generally, C. parvum possessed protective effect in experimental influenza infection. We tested the following parameters: phagocytic and bactericidal activity of granulocytes, liberation of leukocytes migration inhibition factor (LIF). 相似文献
10.
Comparison of BIOGRAM and commercial microdilution antimicrobial susceptibility test systems.
下载免费PDF全文
![点击此处可从《Journal of clinical microbiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
The BIOGRAM (Difco Laboratories, Detroit, Mich.) system, which is designed to calculate MICs from disk diffusion zone diameters, was compared with two commercial microdilution antimicrobial susceptibility systems. A total of 111 clinical isolates were evaluated with each test system. Six additional isolates were tested in a comparison between BIOGRAM and Sceptor (Johnston Laboratories, Inc. Towson, Md.) systems. BIOGRAM demonstrated an overall correlation with the Sceptor microdilution method of 95.7% for 1,287 organism-antimicrobial susceptibility combinations. The BIOGRAM and UniScept (Analytab Products, Inc., Plainview, N.Y.) systems were in agreement in 90.3% of 1,048 organism-antimicrobial susceptibility combinations tested. All methicillin-resistant staphylococci were detected by the standard disk agar diffusion method used with the BIOGRAM system. The BIOGRAM system provides an acceptable alternative to these commercial systems for the determination of quantitative susceptibility. 相似文献