全文获取类型
收费全文 | 403篇 |
免费 | 13篇 |
国内免费 | 16篇 |
专业分类
儿科学 | 32篇 |
妇产科学 | 1篇 |
基础医学 | 33篇 |
口腔科学 | 8篇 |
临床医学 | 62篇 |
内科学 | 84篇 |
皮肤病学 | 3篇 |
神经病学 | 8篇 |
特种医学 | 98篇 |
外科学 | 28篇 |
综合类 | 32篇 |
预防医学 | 7篇 |
眼科学 | 1篇 |
药学 | 26篇 |
中国医学 | 1篇 |
肿瘤学 | 8篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 8篇 |
2014年 | 11篇 |
2013年 | 15篇 |
2012年 | 13篇 |
2011年 | 8篇 |
2010年 | 24篇 |
2009年 | 16篇 |
2008年 | 6篇 |
2007年 | 14篇 |
2006年 | 7篇 |
2005年 | 6篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 5篇 |
2000年 | 8篇 |
1999年 | 13篇 |
1998年 | 24篇 |
1997年 | 27篇 |
1996年 | 25篇 |
1995年 | 18篇 |
1994年 | 18篇 |
1993年 | 15篇 |
1992年 | 1篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 21篇 |
1988年 | 16篇 |
1987年 | 12篇 |
1986年 | 8篇 |
1985年 | 6篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 3篇 |
1981年 | 7篇 |
1980年 | 10篇 |
1979年 | 2篇 |
1978年 | 4篇 |
1977年 | 2篇 |
1976年 | 4篇 |
1975年 | 2篇 |
1932年 | 1篇 |
1925年 | 1篇 |
1924年 | 1篇 |
排序方式: 共有432条查询结果,搜索用时 656 毫秒
401.
Patellar tendinosis (jumper's knee): findings at histopathologic examination, US, and MR imaging. Victorian Institute of Sport Tendon Study Group 总被引:11,自引:0,他引:11
402.
403.
404.
Van Lom KJ; Kellerhouse LE; Pathria MN; Moreland SI; Brown JJ; Zlatkin M; Sartoris DJ; Chevrot A; Resnik CS; Resnick D 《Radiology》1988,166(3):851-855
To develop criteria to distinguish among pyogenic infection, nonpyogenic infection, and neoplastic processes in the spine by means of computed tomography (CT), the authors retrospectively analyzed 17 cases of pyogenic infection (20 sites), 40 cases of neoplastic disease (56 sites), and five cases of granulomatous infection (eight sites). Reliable criteria for pyogenic infection were complete prevertebral soft-tissue involvement, diffuse osteolytic destruction, gas within both bone and soft tissue, and a process centering on an intervertebral disk. Neoplastic disease was characterized by posterior element involvement, partial or absent prevertebral soft-tissue swelling, and osteoblastic alterations. In a limited number of cases, nonpyogenic infection was characterized by focal lytic bone involvement and marginal sclerosis. Blinded testing of these criteria indicated potential for improved diagnostic accuracy in clinical practice. 相似文献
405.
406.
407.
Unsatisfactory hepatic perfusion after placement of an implanted pump and catheter system: angiographic correlation 总被引:2,自引:0,他引:2
Thirty-five patients with scintigrams showing unsatisfactory hepatic artery perfusion after surgical placement of an implanted pump and catheter system were examined with selective angiography (33 cases) or digital subtraction angiography (DSA) during which the contrast material was injected through the side port of the pump (six cases). In 34 of 35 cases, the cause of the unsatisfactory (either extrahepatic or incomplete) hepatic perfusion was defined. DSA was definitive in only two cases, in which extrahepatic flow through collateral vessels was demonstrated. The cause of the perfusion defect was hepatic artery thrombosis in 14 cases, extrahepatic flow through collateral vessels in 14 cases, a misplaced catheter in four cases, and a short proper hepatic artery without adequate length for mixing in two cases. Although hepatic artery perfusion scintigraphy is the primary tool for evaluation of hepatic perfusion after catheter placement, angiography plays an important role in treating the subset of patients with unsatisfactory hepatic perfusion. 相似文献
408.
Smith AS; Weinstein MA; Quencer RM; Muroff LR; Stonesifer KJ; Li FC; Wener L; Soloman MA; Cruse RP; Rosenberg LH 《Radiology》1988,168(1):195-198
Heterotopic gray matter, which previously had been associated with severe congenital malformations of the brain and developmental delay, was found without these associated conditions. The authors found ten cases of heterotopic gray matter on magnetic resonance (MR) images. The lesions had a signal intensity that was isointense compared with that of gray matter on T1, spin-density, and T2-weighted images. Nine of the ten cases were associated with a seizure disorder. The tenth case, discovered during a workup for metastatic lung disease, was confirmed with pathologic studies. Heterotopic gray matter is the presence of cortical neurons in an abnormal location, which may be periventricular (nodular) or within the white matter (laminar). A knowledge of heterotopic gray matter and its association with seizures may prevent the misinterpretation of findings on MR images. 相似文献
409.
410.
Follow-up of 13 children who had had a ureterosigmoid anastomosis 3 1/2 to 10 years previously and whose initial urogram had been satisfactory, showed that growth was normal and that there was no serious metabolic disorder. In particular whole-body potassium did not differ significantly from normal values (as given by Langham, 1961). Asymptomatic urinary infection is the chief hazard in these cases but is difficult to diagnose and may lead to progressive dilatation of the ureters. 相似文献