The following table or figure may be downloaded to PowerPoint for personal use in teaching and presentations. This feature is available to all subscribers to the journal.

You MUST read and follow the guidelines at Request to Reproduce AJR Content if you are distributing or using AJR content beyond academic use (limited distribution, non-revenue producing, or educational purposes).

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)

Fig. 1A. —Changes in distribution among techniques between 1973 and 1997. Bar charts show percentage of diagnostic examinations (A) and resource-based relative value units (B) by category: gray areas indicate general imaging, white indicates sectional imaging, and black indicates special imaging. Codes for surgery, nuclear medicine, radiation therapy, support, and visits are excluded from these charts. Data for 1973 and 1980 are reprinted with permission from [6]; data for 1989 are reprinted from [2]; and data for 1993, 1995, and 1997 are from American Society of Clinic Radiologists manpower surveys (Conoley PM, unpublished data).