全文获取类型
收费全文 | 690篇 |
免费 | 31篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 33篇 |
妇产科学 | 1篇 |
基础医学 | 54篇 |
口腔科学 | 12篇 |
临床医学 | 57篇 |
内科学 | 198篇 |
皮肤病学 | 10篇 |
神经病学 | 40篇 |
特种医学 | 35篇 |
外科学 | 95篇 |
综合类 | 22篇 |
预防医学 | 10篇 |
眼科学 | 39篇 |
药学 | 45篇 |
中国医学 | 3篇 |
肿瘤学 | 62篇 |
出版年
2023年 | 9篇 |
2022年 | 13篇 |
2021年 | 40篇 |
2020年 | 20篇 |
2019年 | 27篇 |
2018年 | 28篇 |
2017年 | 21篇 |
2016年 | 26篇 |
2015年 | 16篇 |
2014年 | 32篇 |
2013年 | 54篇 |
2012年 | 62篇 |
2011年 | 62篇 |
2010年 | 34篇 |
2009年 | 39篇 |
2008年 | 54篇 |
2007年 | 55篇 |
2006年 | 29篇 |
2005年 | 26篇 |
2004年 | 17篇 |
2003年 | 17篇 |
2002年 | 17篇 |
2001年 | 2篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1975年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有725条查询结果,搜索用时 78 毫秒
131.
O'Daniel JC Dong L Zhang L Wang H Tucker SL Kudchadker RJ Lee AK Cheung R Cox JD Kuban DA Mohan R 《International journal of radiation oncology, biology, physics》2008,71(1):274-280
PURPOSE: To compare the effectiveness of daily ultrasound (US)- and computed tomography (CT)-guided alignments with an off-line correction protocol using daily bone alignment plus a correction factor for systematic internal prostate displacement (CF(ID)). METHODS AND MATERIALS: Ten prostate cancer patients underwent CT scans three times weekly using an integrated CT-linear accelerator system, followed by alignment using US for daily radiotherapy. Intensity-modulated radiotherapy plans were designed with our current clinical margins. The treatment plan was copied onto the repeat CT images and aligned using several methods: (1) bone alignment plus CF(ID) after three off-line CT scans (bone+3CT), (2) bone alignment plus CF(ID) after six off-line CT scans (bone+6CT), (3) US alignment, and (4) CT alignment. The accuracy of the repeated US and CT measurements to determine the CF(ID) was compared. The target dosimetric effect was quantified. RESULTS: The CF(ID) for internal systematic prostate displacements was more accurately measured with limited repeat CT scans than with US (residual error, 0.0 +/- 0.7 mm vs. 2.0 +/- 3.2 mm). Bone+3CT, bone+6CT, and US provided equivalent prostate and seminal vesicle dose coverage, but bone+3CT and bone+6CT produced more precise daily alignments. Daily CT alignment provided the greatest target dose coverage. CONCLUSION: Daily bone alignment plus CF(ID) for internal systematic prostate displacement provided better daily alignment precision and equivalent dose coverage compared with daily US alignment. The CF(ID) should be based on at least three repeat CT scans, which could be collected before the start of treatment or during the first 3 treatment days. Daily bone alignment plus CF(ID) provides another option for accurate prostate cancer patient positioning. 相似文献
132.
A 58‐year‐old man presented to the Emergency Room with a 1‐day history of severe pain in the left lower extremity preceded by several days of redness and swelling. He denied any history of trauma. He also denied any systemic symptoms including fever and chills. His past medical history was significant for diabetes, hypertension, deep vein thrombosis, and Evans’ syndrome, an autoimmune hemolytic anemia and thrombocytopenia, for which he was taking oral prednisone. Physical examination revealed a warm, tender, weeping, edematous, discolored left lower extremity. From the medial aspect of the ankle up to the calf, there was an indurated, dusky, violaceous plaque with focal areas of ulceration ( Fig. 1 ).
133.
Sebaceous carcinoma of the ocular adnexa is a malignant neoplasm which can exhibit aggressive local behavior and can metastasize to regional lymph nodes and distant organs. The neoplasm is known to masquerade as other benign and less malignant lesions, resulting in delay in diagnosis and relative high morbidity and mortality. Fine needle aspiration cytology (FNAC) of recurrent upper eyelid nodules treated elsewhere as chalazion was done. Cytological smears were suggestive of malignancy. Subsequently histopathology confirmed the diagnosis of sebaceous gland carcinoma. Eyelid reconstruction was done after histopathologically confirmed tumor-free margins. The article highlights the role of FNAC in early diagnosis and subsequent appropriate surgical management of eyelid sebaceous gland carcinoma to prevent recurrence and metastasis. 相似文献
134.
Rajat Agarwal Shiv Mudgal Amiy Arnav Nishit Ranjan 《Indian Journal of Thoracic and Cardiovascular Surgery》2023,39(4):350
IntroductionEven though there have been few studies on coronary artery bypass grafting (CABG), data on patients with coronavirus disease-2019 (COVID-19) infection show that cardiac surgery has poor outcomes in this subset. From the available studies in the literature, we conducted a systematic review with the aim of determining the outcome of COVID-19 patients who underwent CABG.MethodsBetween December 2019 and October 2022, searches were conducted in PubMed, the Directory of Open Access Journals, and Google Scholar to find studies reporting results of COVID-19 patients undergoing CABG. We extracted data on the clinical profile and outcomes of the patients from the eligible studies. The quality of the studies was assessed using a standardised tool.ResultsThe total sample size across the 12 included studies was 99 patients who underwent CABG in active disease or within 30 days of COVID-19 infection. The median and interquartile range (IQR) for the length of time spent on a mechanical ventilator, stay in the intensive care unit (ICU), and the total hospital stay were 0.9 (0.47–2), 4.5 (2.5–8), and 12.5 (8.5–22.5) days respectively. Seventy-six patients developed postoperative complications, and there were eleven deaths.ConclusionThe findings of the present study indicate that mortality risk goes down when the time between COVID-19 diagnosis and surgery increases. When compared to data from other high-risk urgent or emergent CABG patients around the world who were not infected with COVID-19, patients who underwent CABG in the COVID-19 subgroup had similar postoperative outcomes.Supplementary InformationThe online version contains supplementary material available at 10.1007/s12055-023-01495-7. 相似文献
135.
J. Justin Ebenezer Sargunaraj Joby Elizabeth Ninan Rashmi Tanya Boaz Nithya Sara Mani Rajat Basak Ranjeetha Rachel Inja Rita Ruby A. Albert Suma Susan Mathews 《Indian journal of otolaryngology and head and neck surgery》2023,75(2):322
Objective To study the outcomes in terms of airway, voice and swallowing as well as the economic impact of the trauma on patients’ finances and the constrained health infrastructure due to the pandemic. Materials and methods Study design Retrospective study. Setting: Tertiary care teaching hospital. Subjects and methods: A retrospective study was done of the 19 subjects who sustained acute laryngotracheal trauma during the SARS CoV-2 pandemic and was managed at our institution from January 2020 to September 2021.Results Change in voice was the most common presenting symptom and thyroid cartilage fractures were the commonest cartilage injury noted. It was found that 93% (decannulated) of the patients had good functional outcome and 90% of them required financial support to meet the medical expenses.Conclusion During the COVID 19 pandemic, it was not only, early presentation, timely detection and intervention by the treating team, but also the multidisciplinary teamwork and the support system that facilitated the recuperation and restoration of these traumatized individuals back into society with good laryngeal function. 相似文献
136.
137.
Rajat Thawani Seema Singh Sonal Sharma Naveen Sharma 《The Indian journal of surgery》2015,77(1):10-12
Mucormycosis is a rare and fatal infection that is known to occur in immunocompromised and diabetic patients. The infection is caused by a fungus of the class Zygomycetes. It has been associated with open fractures in patients at risk. We report a case of cutaneous mucormycosis leading to gangrene after a closed fracture. We recommend considering mucormycosis as a differential for wound infections not responding to antibiotics, even in closed injuries. Tissue from surgical debridement should be sent for histopathological and microbiological examination to diagnose the condition early. Early recognition, surgical management, and parenteral antifungal therapy are the mainstay of management of this illness. 相似文献
138.
139.
140.
Rajat Garg Babu P. Mohan Rajesh Krishnamoorthi Tarun Rustagi 《Indian journal of gastroenterology》2018,37(2):120-126