全文获取类型
收费全文 | 2853篇 |
免费 | 150篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 109篇 |
儿科学 | 215篇 |
妇产科学 | 91篇 |
基础医学 | 285篇 |
口腔科学 | 130篇 |
临床医学 | 250篇 |
内科学 | 572篇 |
皮肤病学 | 88篇 |
神经病学 | 245篇 |
特种医学 | 173篇 |
外科学 | 453篇 |
综合类 | 43篇 |
预防医学 | 45篇 |
眼科学 | 82篇 |
药学 | 121篇 |
中国医学 | 10篇 |
肿瘤学 | 105篇 |
出版年
2023年 | 45篇 |
2022年 | 27篇 |
2021年 | 71篇 |
2020年 | 75篇 |
2019年 | 73篇 |
2018年 | 86篇 |
2017年 | 78篇 |
2016年 | 121篇 |
2015年 | 112篇 |
2014年 | 149篇 |
2013年 | 166篇 |
2012年 | 230篇 |
2011年 | 241篇 |
2010年 | 125篇 |
2009年 | 131篇 |
2008年 | 207篇 |
2007年 | 222篇 |
2006年 | 202篇 |
2005年 | 189篇 |
2004年 | 149篇 |
2003年 | 138篇 |
2002年 | 103篇 |
2001年 | 10篇 |
2000年 | 12篇 |
1999年 | 8篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 8篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1979年 | 1篇 |
1972年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有3017条查询结果,搜索用时 31 毫秒
1.
Karaosmanoglu Ali Devrim Onur Mehmet Ruhi Salman Mehmet Coskun Usubutun Alp Karcaaltincaba Musturay Ozmen Mustafa Nasuh Akata Deniz 《Abdominal imaging》2019,44(4):1493-1505
Abdominal Radiology - Metastatic involvement of the ovaries is not rare. The most common tumor types metastasizing to the ovaries, from non-gynecological organs, are breast, colorectal, gastric,... 相似文献
2.
Zedef Dag Burcak Yilmaz Ayse Kutluhan Dogan Donay Unluer Aksan Huseyin Ozkurt Hazim Orhan Kızılkaya Deniz Arslan 《Brachytherapy》2019,18(2):154-162
Purpose
To evaluate the effect of metabolic parameters of pretreatment primary tumor and regional lymph nodes with F-18-FDG PET/CT compared with MRI findings for the prognostic value and disease-free survival (DFS) in locally advanced cervical cancer.Material and Methods
From 2011 to 2016, 112 patients with a diagnosis of cervical cancer stages IB2-IVA treated with concomitant chemoradiation therapy with 3D intracavitary brachytherapy were analyzed. From this group, 50 patients who underwent pretreatment and posttreatment FDG PET/CT and MRI were enrolled. LRFFS, DFS, and overall survival were analyzed in comparison with FDG PET/CT and MRI data. Relationship between SUVmax data and DFS was also assessed.Results
The median followup was 21 months, and median age was 54 years. The estimated 5-year locoregional failure-free survival, DFS, and overall survival rates were 87.4%, 70%, and 81%, respectively. DFS was 59.5% in patients with nodal metastases in FDG PET/CT and 100% in node negative patients (p:0,017). DFS was 50% and 79.4% in MRI node-positive and in node-negative patients, respectively (p:0,260). In addition, the nodal SUVmax (p: 0.005) and posttreatment response in FDG PET-CT (p < 0.001) were significant prognostic factors for DFS. Furthermore, primary tumor volume in MRI (p:0,982), node positivity in MRI (p:0,301), and response in posttreatment MRI (p:0,26) are not significant prognostic factors for DFS.Conclusion
As a result, FDG PET/CT has higher accuracy than MRI in detecting lymph node metastasis, and tumor volume reduction on FDG PET/CT images was greater than that on MRI images after CCRT. 相似文献3.
4.
5.
Cengiz Gomleksiz Deniz Ufuk Erbulut Halil Can Manoj Kumar Kodigudla Amey V. Kelkar Eser Kasapoglu 《The journal of spinal cord medicine》2020,43(1):98-105
Context: To evaluate the stability provided by a new bilateral fixation technique using an in vitro investigation for posterior lumbar segmental instrumentation.Design: Experimental cadaver study. In this study, we propose an alternative technique for a posterior lumbar fixation technique called “inferior-oblique transdiscal fixation” (IOTF).Setting: Study performed at Engineering Center for Orthopedic Research Exellence (ECORE) in Toledo University-Ohio.Participants: Six human lumbar cadaveric specimen used in this study.Interventions: In this study, we propose an alternative technique for a posterior lumbar fixation technique called “inferior-oblique transdiscal fixation” (IOTF). As a novel contribution to the classical technique, the entry point of the screw is the supero-lateral point of the intersecting line drawn between the corpus and the pedicle of the upper vertebra. This approach enables the fixation of two adjacent vertebrae using a single screw on each side without utilizing connecting rods.Outcome Measures: Flexion (Flex), extension (Ext), right and left lateral bending (LB & RB), and right and left axial rotation (LR & RR), and the position data were captured at each load step using the Optotrak motion measurement system and compared for IOTF and posterior transpedicular stabilization.Results: The Posterior stabilization system (PSS) and IOTF significantly reduced the ROM of L4-L5 segment compared to intact segment’s ROM. During axial rotation (AR) IOTF fused index segment more than PSS. Besides this, addition of transforaminal lumbar interbody fusion (TLIF) cage improved the stabilization of IOTF system during flexion, extension and lateral bending. Whereas, PSS yielded better fusion results during extension compared to IOTF with and without interbody fusion cages.Conclusions: We hypothesized that the new posterior bilateral system would significantly decrease motion compared to the intact spine. This cadaver study showed that the proposed new posterior fusion technique IOTF fused the index segment in a similar fashion to the classical pedicle screw fusion technique. 相似文献
6.
7.
8.
Therapy‐related B‐lymphoblastic leukemia associated with Philadelphia chromosome and MLL rearrangement: Single institution experience and the review of the literature 下载免费PDF全文
Rahul Matnani Vishwas Parekh Uma Borate Jason Brazelton Vishnu Reddy Deniz Peker 《Pathology international》2015,65(10):536-540
Therapy related acute lymphoblastic leukemia (t‐ALL) of B cell origin is rare and constitutes approximately 2% of all ALL. Previously compiled data on the complete cytogenetic analysis of 48 t‐B‐ALL cases suggested that MLL rearrangement at 11q23 gene locus is the most common abnormality. Philadelphia chromosome (Ph) and a normal karyotype were reported as the second and third most common karyotypes, respectively. We investigated cytogenetic karyotypes of six t‐B‐ALL cases with a pre‐B cell immunophenotype. Ph + t‐B‐ALL was noted in four of six patients previously treated with radiation and/or chemotherapy. In addition, one case demonstrated MLL rearrangement at 11q23 locus while one case demonstrated normal cytogenetic karyotype. Five of the six t‐B‐ALL patients had persistent leukemia following initiation of chemotherapy for secondary leukemia with survival ranging from 10 to 21 months. To our knowledge, only fourteen patients with Ph + t‐B‐ALL have been described in the literature. In the current study, three of four cases with Ph + t‐B‐ALL were associated with treated breast carcinoma while one patient was treated for Hodgkin lymphoma. All four patients had undergone radiation therapy. The results may indicate a plausible association between Ph+t‐B‐ALL and prior radiation exposure. 相似文献
9.
10.
Evaluation of the Effect of Cardiac Rehabilitation on Left Atrial and Left Ventricular Function and Its Relationship with Changes in Arterial Stiffness in Patients with Acute Myocardial Infarction 下载免费PDF全文