全文获取类型
收费全文 | 1059篇 |
免费 | 85篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 12篇 |
妇产科学 | 3篇 |
基础医学 | 106篇 |
口腔科学 | 18篇 |
临床医学 | 78篇 |
内科学 | 223篇 |
皮肤病学 | 36篇 |
神经病学 | 25篇 |
特种医学 | 19篇 |
外科学 | 74篇 |
综合类 | 17篇 |
预防医学 | 70篇 |
眼科学 | 252篇 |
药学 | 64篇 |
中国医学 | 13篇 |
肿瘤学 | 136篇 |
出版年
2023年 | 17篇 |
2022年 | 18篇 |
2021年 | 59篇 |
2020年 | 32篇 |
2019年 | 46篇 |
2018年 | 49篇 |
2017年 | 35篇 |
2016年 | 40篇 |
2015年 | 41篇 |
2014年 | 47篇 |
2013年 | 64篇 |
2012年 | 106篇 |
2011年 | 119篇 |
2010年 | 45篇 |
2009年 | 24篇 |
2008年 | 69篇 |
2007年 | 55篇 |
2006年 | 37篇 |
2005年 | 48篇 |
2004年 | 37篇 |
2003年 | 17篇 |
2002年 | 24篇 |
2001年 | 25篇 |
2000年 | 22篇 |
1999年 | 13篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1993年 | 2篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
1947年 | 1篇 |
1928年 | 1篇 |
排序方式: 共有1147条查询结果,搜索用时 15 毫秒
1.
What is the prognostic value of myocardial perfusion imaging using rubidium-82 positron emission tomography? 总被引:5,自引:0,他引:5
Keiichiro Yoshinaga Benjamin J W Chow Kathryn Williams Li Chen Robert A deKemp Linda Garrard Alexander Lok-Tin Szeto May Aung Ross A Davies Terrence D Ruddy Rob S B Beanlands 《Journal of the American College of Cardiology》2006,48(5):1029-1039
OBJECTIVES: The objective was to determine the prognostic value of rubidium-82 (82Rb) positron emission tomography (PET) myocardial perfusion imaging (MPI). BACKGROUND: 82Rb PET MPI accurately diagnoses coronary artery disease (CAD). However, there are limited data evaluating its prognostic value. METHODS: Follow-up (3.1 +/- 0.9 years) was obtained in 367 patients who underwent dipyridamole 82Rb PET MPI. Patients were divided into groups based on their summed stress score (SSS): group I, normal (<4); group II, mild (4 to 7); and group III, moderate (8 to 11) to severe (> or =12). RESULTS: There were significant differences among patients in the 3 SSS groups for hard events (cardiac death and myocardial infarction [MI]) (p < 0.001) and total cardiac events (hard events, revascularization and hospitalization) (p < 0.001). The annual hard events rates were 0.4%, 2.3%, and 7.0% in the normal, mild, and moderate-severe groups, respectively. In adjusted survival models, 82Rb PET SSS was the strongest predictor of total cardiac events and a significant predictor of hard events. Among patients referred for PET after 99mTc single-photon emission computed tomography, the annual total event rate was higher with abnormal versus normal SSS on PET (15.2% vs. 1.3%, p < 0.001). In patients with obesity, the annual total event rate was 11.1% with an abnormal scan and 1.5% with a normal scan (p < 0.001). CONCLUSIONS: This study shows that 82Rb PET MPI has significant prognostic value for predicting cardiac events, including death and MI. It also seems to have prognostic value in patients whose diagnosis remains uncertain after single-photon emission computed tomography MPI and in obese patients. The prognostic value of PET MPI may improve the management of cardiac patients. 相似文献
2.
Anatomical study of the obturator internus, gemelli and quadratus femoris muscles with special reference to their innervation 总被引:2,自引:0,他引:2
The manner of innervation of the obturator internus, superior and inferior gemelli, and the quadratus femoris in humans (101 pelvic halves) and in rhesus monkeys (Macaca mulatta: 8 pelvic halves) were investigated. In most specimens, the inferior gemellus originated from the lateral surface of the ischial tuberosity and also from the medial surface (intrapelvic origin) just beneath the obturator internus and was covered by the falciform process of the sacrotuberous ligament. The superior gemellus was frequently innervated by the nerve to the obturator internus and the nerve to the quadratus femoris (60.4%), and the inferior gemellus was innervated by the obturator internus nerve in two specimens. The quadratus femoris nerve originated from more cranial segments than the obturator internus nerve, however these nerves had various communication patterns inside and outside the muscles. According to the intramuscular nerve distribution, in some specimens the branches to the superior gemellus from the quadratus femoris nerve extended to the inferior gemellus, and the branches to the inferior gemellus were distributed to the obturator internus. The present findings revealed that the positional relationships among the branches to the obturator internus and gemelli muscles are relatively constant, although the branching patterns and innervation patterns were varied. The various patterns and routes are considered to reflect the variability of the differentiation patterns of the anlage of the muscles. A possible schematic model of the positional relationships between the muscles and the nerves is proposed. 相似文献
3.
4.
Joey Kuok Hoong Yam Thet Tun Aung Song Lin Chua Yingying Cheng Gurjeet Singh Kohli Jianuan Zhou Florentin Constancias Yang Liu Zhao Cai May Margarette Santillan Salido Daniela I. Drautz-Moses Scott A. Rice Stephan Christoph Schuster Zhao Zhi Boo Bin Wu Staffan Kjelleberg Tim Tolker-Nielsen Rajamani Lakshminarayanan Roger W. Beuerman Liang Yang Michael Givskov 《Infection and immunity》2022,90(8)
5.
6.
7.
8.
Cutaneous histoplasmosis with prominent parasitization of epidermal keratinocytes: report of a case
下载免费PDF全文
![点击此处可从《Journal of cutaneous pathology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hedieh H. Honarpisheh Jonathan L. Curry Kristen Richards Priyadharsini Nagarajan Phyu P. Aung Carlos A. Torres‐Cabala Doina Ivan Carol R. Drucker Richard Cartun Victor G. Prieto Michael T. Tetzlaff 《Journal of cutaneous pathology》2016,43(12):1155-1160
Disseminated histoplasmosis most commonly occurs in immunosuppressed individuals and involves the skin in approximately 6% of patients. Cutaneous histoplasmosis with an intraepithelial‐predominant distribution has not been described. A 47‐year‐old man was admitted to our institution with fever and vancomycin‐resistant enterococcal bacteremia. He had been diagnosed with T‐cell prolymphocytic leukemia 4 years earlier and had undergone matched‐unrelated‐donor stem cell transplant 2 years earlier; on admission, he had relapsed disease. His medical history was significant for disseminated histoplasmosis 6 months before admission, controlled with multiple antifungal regimens. During this final hospitalization, the patient developed multiple 2–5 mm erythematous papules, a hemorrhagic crust across the chest, shoulders, forearms, dorsal aspect of the fingers, abdomen and thighs. Skin biopsy revealed clusters of oval yeast forms mostly confined to the cytoplasm of keratinocytes and within the stratum corneum; scattered organisms were present in the underlying superficial dermis without any significant associated inflammatory infiltrate. Special stains and immunohistochemical studies confirmed these to be Histoplasma organisms. We highlight this previously unrecognized pattern of cutaneous histoplasmosis to ensure its prompt recognition and appropriate antifungal therapy. 相似文献
9.