Department of Radiology, Kangdong Seong-Sim Hospital, Hallym University College of Medicine, 445 Gil-dong, Kangdong-Gu, Seoul 134-701, South Korea.
Radiology. 2012 Sep;264(3):796-802. doi: 10.1148/radiol.12111976.
To determine the characteristics and trends of the original articles published in two major American radiology journals, AJR American Journal of Roentgenology (AJR) and Radiology, between 2001 and 2010.
This was a retrospective bibliometric analysis that did not involve human subjects and was exempt from institutional review board approval. All 6542 original articles published in AJR and Radiology between 2001 and 2010 were evaluated. The following information was abstracted from each article: radiologic subspecialty, radiologic technique used, type of research, sample size, study design, statistical analysis, study outcome, declared funding, number of authors, affiliation of the first author, and country of the first author. In addition, all the variables examined were presented along with the trend over time.
The most common subspecialty of study was abdominal (1219 of 6542, 18.6%), followed by vascular/interventional (804 of 6542, 12.3%). A total of 3744 (57.2%) original articles used magnetic resonance (MR) imaging or computed tomography (CT), 5495 (84.1%) were clinical research articles, 3060 (46.8%) had sample size of more than 50, 4087 (62.5%) were retrospective, 4714 (72.1%) performed statistical analysis, 6225 (95.2%) showed positive study outcome, 4784 (73.1%) were not funded, 3942 (60.3%) had four to seven authors, and 5731 (87.6%) were written by the primary author who was from a department of radiology or radiology-related specialties. The United States published 45.5% (2975 of 6542) of the articles, followed by Japan (n = 525, 8.0%), Germany (n = 485, 7.4%), and South Korea (n = 455, 7.0%). In the time trend analysis, the following variables showed a significantly positive trend: cardiac subspecialty, CT and MR imaging as the radiologic techniques, type of research as other (nonbasic, nonclinical), sample size of more than 50, four to seven as the number of authors, medicine-related department of the first author, and South Korea and Italy as countries of the first author. On the other hand, pediatric subspecialty, combined (basic and clinical) type of research, and number of authors fewer than four showed a significantly negative trend.
The bibliometric analysis of the AJR and Radiology journals with articles published between 2001 and 2010 revealed characteristics and trends of the current radiology research that may provide useful information to researchers and editorial staff in radiology.
确定 2001 年至 2010 年间发表在两家美国主要放射学杂志《美国放射学杂志》（AJR）和《放射学》中的原始文章的特征和趋势。
这是一项回顾性的文献计量分析，不涉及人类受试者，因此无需机构审查委员会批准。评估了 2001 年至 2010 年间发表在 AJR 和 Radiology 中的 6542 篇原始文章。从每篇文章中提取了以下信息：放射学专业、使用的放射学技术、研究类型、样本量、研究设计、统计分析、研究结果、申报资金、作者人数、第一作者的隶属关系和第一作者的国家。此外，还呈现了所有检查的变量以及随时间的变化趋势。
研究中最常见的专业是腹部（6542 篇中的 1219 篇，18.6%），其次是血管/介入（6542 篇中的 804 篇，12.3%）。共有 3744 篇（57.2%）原始文章使用磁共振成像（MR）或计算机断层扫描（CT），5495 篇（84.1%）为临床研究文章，3060 篇（46.8%）样本量超过 50，4087 篇（62.5%）为回顾性研究，4714 篇（72.1%）进行了统计分析，6225 篇（95.2%）显示阳性研究结果，4784 篇（73.1%）未获得资金，3942 篇（60.3%）有 4 至 7 位作者，5731 篇（87.6%）由第一作者撰写，第一作者来自放射科或放射科相关专业。美国发表了 45.5%（6542 篇中的 2975 篇）的文章，其次是日本（n = 525，8.0%）、德国（n = 485，7.4%）和韩国（n = 455，7.0%）。在时间趋势分析中，以下变量呈显著正趋势：心脏专业、CT 和 MR 成像作为放射学技术、其他（非基础、非临床）类型的研究、样本量超过 50、4 至 7 位作者、与医学相关的第一作者隶属部门以及韩国和意大利作为第一作者的国家。另一方面，儿科专业、综合（基础和临床）研究类型和作者人数少于 4 人呈显著负趋势。
对 2001 年至 2010 年间发表的 AJR 和 Radiology 杂志的文献计量分析揭示了当前放射学研究的特征和趋势，这可能为放射学领域的研究人员和编辑人员提供有用的信息。
