Table 1.

Change information model classes for radiology report summaries and their associated descriptions and examples

Change class	Description	Example
New or worse	Finding was not present on the prior study or has progressed	“skeletal metastases a few of which are slightly more prominent”
Unchanged	Finding has not changed	“no significant change in the mild mediastinal and mild right hilar adenopathy”
Improved	Finding has partially resolved	“marked interval improvement in the bilateral pulmonary nodules”
Indeterminate	Change cannot be assessed	“calcified right hilar and mediastinal nodes with calcified granulomas in the liver and spleen”