全文获取类型
收费全文 | 520篇 |
免费 | 33篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 3篇 |
妇产科学 | 9篇 |
基础医学 | 49篇 |
口腔科学 | 16篇 |
临床医学 | 32篇 |
内科学 | 301篇 |
神经病学 | 27篇 |
特种医学 | 10篇 |
外科学 | 64篇 |
预防医学 | 17篇 |
眼科学 | 3篇 |
药学 | 15篇 |
肿瘤学 | 31篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 1篇 |
2019年 | 11篇 |
2018年 | 7篇 |
2017年 | 13篇 |
2016年 | 9篇 |
2015年 | 16篇 |
2014年 | 23篇 |
2013年 | 25篇 |
2012年 | 38篇 |
2011年 | 41篇 |
2010年 | 29篇 |
2009年 | 18篇 |
2008年 | 37篇 |
2007年 | 36篇 |
2006年 | 48篇 |
2005年 | 39篇 |
2004年 | 38篇 |
2003年 | 28篇 |
2002年 | 25篇 |
2001年 | 7篇 |
2000年 | 4篇 |
1999年 | 6篇 |
1998年 | 10篇 |
1997年 | 6篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 1篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 4篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有578条查询结果,搜索用时 15 毫秒
51.
Kamisawa H Kojima Y Hayashi Y Imura M Mizuno K Kohri K 《International urology and nephrology》2008,40(4):977-981
Objectives We measured the testis volume of patients with unilateral cryptorchidism preoperatively and compared with a unilateral hydrocele
testis to assess testicular development in these patients.
Patients and methods The present study included 129 children (ranging in age from 10 months to 5 years) with unilateral cryptorchidism who were
treated from 2000 to 2006 at our institution. We evaluated the correlation between testicular volume and the location of testes
or the age of these children. We also examined the testicular volume of 50 children with unilateral hydrocele testis (range,
8 months to 5 years).
Results There was no difference in testicular volume among each position of the undescended testis. The volumes of both undescended
testes and hydrocele testes did not change until 5 years of age. There was a significant difference in testicular volume between
undescended and hydrocele testes. The average testicular volume of cryptorchidism is significantly smaller than that of hydrocele
testes both under and over 2 years old.
Conclusions From the viewpoint of undescended testicular volume, cryptorchid children should be operated on as early as possible. 相似文献
52.
53.
Shigetoshi Wakasugi Atushi Noguti Toshizou Katuda Terumi Hashizume Yoshihisa Hasegawa 《Journal of nuclear medicine》2002,43(5):596-602
In this study, we evaluated the potential of (99m)Tc-hexakis-2-methoxyisobutylisonitrile (MIBI) for detecting bone metastases in comparison with a conventional bone tracer. METHODS: (99m)Tc-MIBI and (99m)Tc-hydroxymethylene diphosphonate (HMDP) scans were obtained from 99 patients with proven malignant diseases and suspected bone metastases. We compared 373 lesions that showed abnormal uptake on (99m)Tc-MIBI scans or (99m)Tc-HMDP scans (or both). RESULTS: Bone metastases were confirmed in 334 of 373 lesions. Thirty-nine lesions on (99m)Tc-HMDP scans had false-positive findings, but only 2 of these lesions had false-positive findings on (99m)Tc-MIBI scans. (99m)Tc-MIBI and (99m)Tc-HMDP scans were equivalent in 168 of 334 lesions (50.3%). (99m)Tc-MIBI scans correctly detected more lesions than (99m)Tc-HMDP scans: 284 lesions (85.0%) versus 218 lesions (65.3%) (P < 0.005), respectively. (99m)Tc-MIBI scans showed a markedly higher sensitivity for detecting metastases in the femur and humerus compared with (99m)Tc-HMDP scans: 97 of 98 lesions (99.0%) versus 35 of 98 lesions (35.7%) (P < 0.005) and 21 of 22 lesions (95.5%) versus 11 of 22 lesions (50.0%) (P < 0.005), respectively. (99m)Tc-HMDP scans of 17 patients showed no abnormal images. However, (99m)Tc-MIBI scans correctly detected bone metastases, and subsequent development of multiple lesions was observed on follow-up (99m)Tc-HMDP scans of 15 patients. (99m)Tc-MIBI scans were superior to (99m)Tc-HMDP scans in the detection of metastases attributed to breast cancer, multiple myeloma, and hepatoma. On the contrary, (99m)Tc-MIBI scans were less sensitive than (99m)Tc-HMDP scans for detecting bone metastases attributed to prostate cancer in the other skeletal sites except for femur and humerus. CONCLUSION: (99m)Tc-MIBI scans have better sensitivity for detecting bone metastases and provide more specific complementary findings than conventional bone scans. (99m)Tc-MIBI accumulation attributed to bone marrow metastases may occur at an early stage, before the bone remodeling process in the surrounding bone can be detected on conventional bone scans. 相似文献
54.
Kamisawa T Tu Y Egawa N Tsuruta K Okamoto A 《Surgical and radiologic anatomy : SRA》2007,29(5):405-408
Background Embryologically, the pancreatic duct system develops by the fusion between the dorsal and ventral pancreatic bud ducts. It
has been suggested that the proximal part of the main dorsal pancreatic duct partially regresses to form the accessory pancreatic
duct (APD). Aim of this study was to clarify the anatomy of the pancreatic duct system of the head of the pancreas and investigate
the embryology of the normal pancreatic duct system.
Methods We reviewed endoscopic retrograde pancreatography of normal pancreatic heads (n = 256) and pancreas divisum (n = 36), focusing on long inferior branches arising from the APD and the main pancreatic duct (MPD). The accessory pancreatograms
were divided into two patterns of course and shape, the long type (171 cases) and the short type (85 cases) according to the
length of the MPD from the orifice to the junction with the APD. The long-type APD formed a straight line and joined the MPD
at the neck portion of the pancreas. The short-type APD joined the MPD near its first inferior branch.
Results The shape of the long-type APD was quite similar to that of the dorsal pancreatic duct of pancreas divisum. The short-type
APD was less likely to have a long inferior branch arising from the APD. The length of the APD from the orifice to the first
long inferior branch was similar in the long-type APD (19.4 ± 4.0 mm) and in the short-type APD (18.8 ± 4.2 mm). The first
long inferior branch from the long-type APD passed though the MPD near the origin of the inferior branch from the MPD, whereas
the short-type APD joined the MPD near its inferior branch.
Conclusions There are two types of APD. The long-type APD was quite similar to the shape of the dorsal pancreatic duct of pancreas divisum,
and seems to represent a continuation of the main duct of the dorsal pancreatic bud. The short-type APD was less likely to
have a long inferior branch, and seems to be formed by the most proximal part of the main duct of the dorsal pancreatic bud
and its long inferior branch. 相似文献
55.
Maekawa M Taniguchi T Uramoto T Higashi H Horii T Takeshita A Sugimura H Kanamori M 《Clinica chimica acta; international journal of clinical chemistry》2005,355(1-2):181-184
BACKGROUND: To investigate relationships between phenotypes and genotypes is not simple. We propose a phenotype-to-genotype screening strategy and pooled DNA system. As a pilot study of this strategy, we used arbitrarily primed polymerase chain reaction (AP-PCR) in combination with single-stranded DNA conformation polymorphism (SSCP) to screen for genetic polymorphisms associated with longevity. METHODS: Study subjects were separated into 3 age groups, individuals aged >100 years, 90-99 years and 60-69 years. Genomic DNAs were prepared from each individual, pooled to represent the 5 study groups, and then the pooled genomic DNAs were subjected to AP-PCR-SSCP analysis. RESULTS: We found 1 SNP more frequently in senior citizens with longevity. The genotype frequency of the 82133G>A polymorphism of human chromosome 3 clone RP11-61K12 (AC011199) differed significantly (P=0.0189, Fisher's exact test) between older subjects (>90 years) and younger subjects (<70 years). It is noteworthy that the strategy we describe herein was useful for identifying an SNP that showed statistically significant differences in its distribution across the subject groups. CONCLUSIONS: The pooled DNA strategy and quantitative genotype discrimination can also be applied to screening for the relationship between phenotype and genotype more effectively. 相似文献
56.
Sayuki Kobayashi Terumi Hayashi Kaori Akiya Michiko Ichihara Michiko Minai Yoshihiko Sakai Kan Takayanagi 《Journal of Medical Ultrasonics》2006,33(1):23-28
Purpose We aimed to identify the electrical stimulation sites of pacemaker leads using a tissue tracking method of tissue Doppler
imaging.
Methods The study group consisted of 30 patients who had undergone permanent pacemaker implantation. During tissue Doppler imaging,
the initial contraction site was seen as a red area stimulated by the pacemaker lead. This red area was analyzed precisely
using time–distance curves generated by tissue tracking.
Results The initial contraction site of the myocardium was located in the interventricular septum in seven patients and in the apical
portion of the right ventricle in 11 patients. Furthermore, analysis of time–distance curves demonstrated that one point within
the red area started to move earlier than the others.
Conclusion The site of electrical stimulation within the myocardium can be determined from the time–distance curves generated by the
tissue tracking method.
A summary of this paper was presented at the 77th Conference of the Japan Society of Ultrasonics in Medicine (Tochigi, April
2004) 相似文献
57.
Exploring the length of the common channel of pancreaticobiliary maljunction on magnetic resonance cholangiopancreatography
下载免费PDF全文
![点击此处可从《Journal of hepato-biliary-pancreatic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Fumihide Itokawa Terumi Kamisawa Toshiaki Nakano Takao Itoi Yoshinori Hamada Hisami Ando Hideki Fujii Tsugumichi Koshinaga Hitoshi Yoshida Eiji Tamoto Takuo Noda Yasutoshi Kimura Hiroyuki Maguchi Naoto Urushihara Jun Horaguchi Yoshiki Morotomi Masahito Sato Keiji Hanada Masao Tanaka Astushi Takahashi Taketo Yamaguchi Yuuki Arai Akihiko Horiguchi Yoshinori Igarashi Kazuo Inui The Committee of Diagnostic Criteria of The Japanese Study Group on Pancreaticobiliary Muljunction 《Journal of hepato-biliary-pancreatic sciences》2015,22(1):68-73
58.
Characteristic Findings of Endoscopic Retrograde Cholangiopancreatography in Autoimmune Pancreatitis
Susumu Iwasaki Terumi Kamisawa Satomi Koizumi Kazuro Chiba Taku Tabata Sawako Kuruma Go Kuwata Takashi Fujiwara Koichi Koizumi Takeo Arakawa Kumiko Momma Seiichi Hara Yoshinori Igarashi 《Gut and liver》2015,9(1):113-117
Background/Aims
Diffuse or segmental irregular narrowing of the main pancreatic duct (MPD), as observed by endoscopic retrograde cholangiopancreatography (ERCP), is a characteristic feature of autoimmune pancreatitis (AIP).Methods
ERCP findings were retrospectively examined in 40 patients with AIP in whom irregular narrowing of the MPD was detected near the orifice. The MPD opening sign was defined as the MPD within 1.5 cm from the orifice being maintained. The distal common bile duct (CBD) sign was defined as the distal CBD within 1.5 cm from the orifice being maintained. Endoscopic findings of a swollen major papilla and histological findings of specimens obtained from the major papilla were examined in 26 and 21 patients, respectively.Results
The MPD opening sign was detected in 26 of the 40 patients (65%). The distal CBD sign was detected in 25 of the 32 patients (78%), which showed stenosis of the lower bile duct. The patients who showed the MPD opening sign frequently showed the distal CBD sign (p=0.018). Lymphoplasmacytic infiltration, but not dense fibrosis, was histologically detected in biopsy specimens obtained from the major papilla.Conclusions
On ERCP, the MPD and CBD adjacent to the major papilla are frequently maintained in patients with AIP involving the pancreatic head. These signs are useful for diagnosing AIP on ERCP. 相似文献59.
Ductal and acinar differentiation in pancreatic endocrine tumors 总被引:5,自引:0,他引:5
Kamisawa T Tu Y Egawa N Ishiwata J Tsuruta K Okamoto A Hayashi Y Koike M Yamaguchi T 《Digestive diseases and sciences》2002,47(10):2254-2261
Rare pancreatic endocrine tumors consisting of both exocrine and endocrine components have been reported sporadically. We investigated the ductal and acinar differentiation in pancreatic endocrine tumors. In immunohistochemical studies of 28 pancreatic endocrine tumors, staining with anti-carcinoembryonic antigen (CEA) or CA19-9 antibody indicated ductal differentiation, while staining with anti-amylase or anti-trypsin antibody indicated acinar differentiation. K-ras gene mutations and p53 gene alterations also were studied. Ten tumors were immunoreactive for CEA or CA19-9. Five tumors diffusely immunoreactive for CEA or CA19-9, in addition to endocrine markers, were diagnosed as duct–endocrine cell tumors of the pancreas. Two tumors diffusely immunoreactive for CEA or CA19-9 and also for pancreaticogut hormones as well as endocrine markers were diagnosed as duct–acinar–endocrine cell tumors. These tumors showed uniform histologic features and synchronous ductal, acinar, and endocrine differentiation, distinct from the coexisting different cellular populations seen in collision tumors. All tumors were malignant. These duct–endocrine cell tumors or duct–acinar–endocrine cell tumors of the pancreas may be derived from a stem cell that retains the capability of expressing either an exocrine or endocrine phenotype. Only one K-ras gene mutation and no p53 gene alterations were detected in these tumors, which suggests that they constitute an entity with a different origin than ductal carcinomas. 相似文献
60.
Ohara H Okazaki K Tsubouchi H Inui K Kawa S Kamisawa T Tazuma S Uchida K Hirano K Yoshida H Nishino T Ko SB Mizuno N Hamano H Kanno A Notohara K Hasebe O Nakazawa T Nakanuma Y Takikawa H 《Journal of hepato-biliary-pancreatic sciences》2012,19(5):536-542