全文获取类型
收费全文 | 586篇 |
免费 | 41篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 43篇 |
妇产科学 | 5篇 |
基础医学 | 59篇 |
口腔科学 | 10篇 |
临床医学 | 52篇 |
内科学 | 103篇 |
皮肤病学 | 7篇 |
神经病学 | 22篇 |
特种医学 | 97篇 |
外科学 | 55篇 |
综合类 | 63篇 |
预防医学 | 29篇 |
眼科学 | 12篇 |
药学 | 37篇 |
肿瘤学 | 34篇 |
出版年
2022年 | 8篇 |
2021年 | 9篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 13篇 |
2017年 | 10篇 |
2016年 | 12篇 |
2015年 | 19篇 |
2014年 | 8篇 |
2013年 | 11篇 |
2012年 | 26篇 |
2011年 | 24篇 |
2010年 | 24篇 |
2009年 | 23篇 |
2008年 | 15篇 |
2007年 | 20篇 |
2006年 | 20篇 |
2005年 | 28篇 |
2004年 | 15篇 |
2003年 | 16篇 |
2002年 | 18篇 |
2001年 | 17篇 |
2000年 | 11篇 |
1999年 | 23篇 |
1998年 | 32篇 |
1997年 | 27篇 |
1996年 | 19篇 |
1995年 | 16篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 7篇 |
1990年 | 3篇 |
1989年 | 15篇 |
1988年 | 12篇 |
1987年 | 17篇 |
1986年 | 15篇 |
1985年 | 6篇 |
1984年 | 8篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 9篇 |
1970年 | 3篇 |
1969年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有631条查询结果,搜索用时 50 毫秒
1.
2.
The purpose of this study is to show the spectrum of adjacent organ invasion and to make a brief review of hepatic alveolar hydatid disease (AHD), using CT and MR imaging. We retrospectively reviewed CT and MR images of three patients with various adjacent organ invasions surgically and histologically proven to be AHD. Local invasion to right kidney and adrenal, right hemidiaphragm and lung were detected in one patient, right adrenal in another patient and gall bladder, duodenum, gastric wall and pancreas invasion in the other. AHD may rarely extend to the gall bladder, stomach, duodenum, pancreas, right adrenal and kidney, diaphragm, pleura and lung. The extension of the disease outside the liver is usually encountered in patients with large, peripherally located masses in the advanced stage of the disease. 相似文献
3.
4.
Annemieke C. Kole MD Omgo E. Nieweg MD PhD Robert J. van Ginkel MD Jan Pruim MD PhD Harald J. Hoekstra MD PhD Anne M. J. Paans PhD Willem Vaalburg PhD Dr. Heimen Schraffordt Koops MD PhD 《Annals of surgical oncology》1997,4(1):57-63
Background: It is often difficult to detect a local recurrence of soft-tissue sarcomas due to disturbance of the normal anatomy by previous
surgery and radiotherapy. The aim of this study was to assess the value of positron emission tomography (PET) with [18F]fluoro-2-deoxy-d-glucose (FDG) for detecting local recurrences.
Methods: In the period 1992–1995, 17 patients with proven or suspected local recurrence of soft-tissue sarcoma were examined using
FDG-PET. Fifteen of these patients were ultimately proven to have a recurrence.
Results: Recurrence was visualized in 14 patients (93%). Small tumors (maximum diameter 0.5 cm) were as easily visible as large lesions
(maximum diameter 20 cm). In one patient the PET scan was positive, but the recurrence could not be proven histologically.
Recurrence was proven 1 year later. A recurrent low-grade liposarcoma was not visualized. The two patients with benign lesions
had a negative PET scan. The mean glucose metabolic rate was calculated to be 13.2 μmol/100 g/min (range 1.9–28.4). A correlation
was found between the histological malignancy grade and the metabolic rate (p<0.05; Kruskal-Wallis).
Conclusion: PET with FDG is a useful addition to the diagnostic armamentarium for detecting local recurrence of soft-tissue sarcomas
and provides an indication of the malignancy grade of the recurrent lesion.
Presented at the 47th Annual Meeting of The Society for Surgical Oncology, Houston, Texas, March 17–20, 1994. 相似文献
5.
6.
C McKenzie BAppSc P Megaw BAppSc I Morgan PhD MK Boelen PhD 《Clinical & experimental ophthalmology》1997,25(4):79-81
Deprivation of form vision by the fitting of translucent occluders suppressed the diurnal cycling of enkephalinergic amacrine cells (the ENSLI amacrine cells), in the chicken. Daily periods of normal vision or enforcing temporal contrast using strobe lighting appeared to restore normal functioning of the ENSLI cells. These results suggest that the ENSLI cells are involved in retinal circuits that assess the quality of the visual image and control eye growth. 相似文献
7.
8.
9.
10.