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CINAHL (Cumulative Index to Nursing and Allied Health Literature) is a great database for locating JOURNAL articles
This database has very good articles about all sorts of medical issues. Some of the options on the ADVANCED SEARCH page include date range, allied health & health promotion journals, and patient groups among others. Look through them all to see if any will help with your particular search.
To get even more specific articles, limit the Publication to one of the following:
ASRT Radiologic Technology
AEIRS Radiologic Science and Education
The articles in this database are what is referred to as "point of care" or "point of need" articles and are considered by teachers to be encyclopedic in nature; therefore, they are considered text articles. These will be useful to describe diseases and conditions.