《 医学信息检索与利用 》 Medical Information Retrieval. March 28, 2007. 黄利辉. 概论 - 信息检索系统 美国生物医学文献检索系统 Medline & PubMed. 信息检索的定义. Information Retrieval Is the science and practice of identification and efficient use of recorded media Biomedical literature Multimedia publishing - PowerPoint PPT Presentation
PowerPoint PresentationInformation Retrieval
Is the science and practice of identification and efficient use of
recorded media
Biomedical literature
Multimedia publishing
Chemical structures
Cartographic materials
1971 MEDLARS Online
1980s full-text databases
Original content (primary literature)
Original content (primary literature)is developed through new
observations and analysis of the world.
(Medical journal articlesconference proceedings white papers
etc.)
Peer review
Authors develop synoptic content by extracting important
observations and principles from sources of original content, as
well as from personal experience.
Text book, practice guidelines, drug monographs, review articles
etc.
PUMC Information Retrieval Training
Bibliographic content is the information abstracted from the
original source
Full-text content:
Citation information
Original literature
Review articles
item attribute (document No.)
The process of stating information needs in terms of queries
Information need is the searcher’s expression, in her own language,
of the information that she desires
“should middle-aged men be given a daily dose of aspirin to prevent
heart attack”
Aspirin AND prevention AND heart AND attack
PUMC Information Retrieval Training
The goal of indexing is to produce the smallest, most efficient
representation of the original content that will facilitate
high-quality retrieval
Index items are units of information suitable for matching with a
query
Index attributes describe facets of the item
PUMC Information Retrieval Training
Content structuring
Medline
Information abstracted from the publication, such as the authors’
names, article title, article source, publication data, and
authors’ abstract
Information added by a human indexer, such as subject headings and
publication types
PUMC Information Retrieval Training
IS - 1523-6838 (Electronic)
TI - A case of "pure" preeclampsia with nephrotic syndrome before
15 weeks of
gestation in a patient whose renal biopsy showed glomerular
capillary
endotheliosis.
AB - A 35-year-old Japanese woman for whom a previous health
checkup showed
normal blood pressure and urinalysis results without
serological
AD - Department of Internal Medicine and Division of
Immunopathology, Clinical
Hospital, Chuoh, Japan.
[email protected]
TA - Am J Kidney Dis
JT - American journal of kidney diseases : the official journal of
the
National Kidney Foundation.
PUMC Information Retrieval Training
Medical Subject Headings (MeSH)
MeSH was developed by the NLM to represent important concepts in
biomedicine.
18,000 subject headings grouped into one of 15 trees
Diseases Category
Cardiovascular Diseases
Vascular Diseases
The reason that Medline have manually assigned
controlled-vocabulary terms :
More thorough representation of the main concepts found in the
paper
It facilitates retrieval by concept
Publication type: 1991 more detailed PT
PUMC Information Retrieval Training
Query formulation is the process by which information needs are
translated into queries suitable for searching.
Person’s role in the healthcare process
Medical researchers
PUMC Information Retrieval Training
Field qualification: a designation fo which index or field should
be searched
Text-word searching
Wildcard characters * #
Ranking or sorting the output by some criteria
Displaying the results to the user
PUMC Information Retrieval Training
Matching
Queries are compared against the index, and a result set is
created
Ranking
The original result set is sorted or ranked by criteria
(chronology, alphabetic ranking, relevance ranking )
Display
PUMC Information Retrieval Training
Number of relevant documents in database
Recall= Number of documents retrieved and relevant
Number of documents retrieved
PUMC Information Retrieval Training
Recall and precision of clinician searchers at McMaster university
(1990)
18.unknown
PUMC Information Retrieval Training
PUMC Information Retrieval Training
1963
Biotechnology Information
National Library of Medicine at NIH
Establish public databases
Disseminate biomedical information
US
PUMC Information Retrieval Training
Entrez
PopSet
Structure
PubMed
Books
PubMed Central
Based on key word searching (MESH terms, author names, gene names,
accession or gi numbers, or just recognized patterns in the
records).
15 database are included….
PUMC Information Retrieval Training
Protein sequences
3-D Structure
Part 1. The Databases
Part 2. Data Flow and Processing
Part 4. User Support
PUMC Information Retrieval Training
111966
PUMC Information Retrieval Training
MEDLINE
PUMC Information Retrieval Training
placenta growth oxygen——((("placenta"[MeSH Terms] OR placenta[Text
Word]) AND (("growth and development"[Subheading] OR "growth"[MeSH
Terms]) OR growth[Text Word])) AND ((("oxygen"[MeSH Terms] OR
"oxygen inhalation therapy"[MeSH Terms]) OR "Oxygen"[MeSH Terms])
OR oxygen[Text Word]))
PUMC Information Retrieval Training
PUMC Information Retrieval Training
PUMC Information Retrieval Training
Display)
Abstract report:PMIDUI
Citation Report: MeSH
MEDLINE Report:
Taiwan I Hsueh Hui ChihChang PYtaiwan yi xue za zhi ) 1975
PUMC Information Retrieval Training
PUMC Information Retrieval Training
PUMC Information Retrieval Training
PUMC Information Retrieval Training