1.   All available studies were used in examining the correlations between the scan score and the CDAI and Simple Index.

2.   The scan score is a dimensionless quantity, the magnitude of which is related to the degree of abnormal uptake in the gut.

3.   The Mann-Whitney test was applied to examine the difference between the scan score in active and quiescent disease.

4.   Data in the Table show that the scan score correlated significantly with all laboratory measurements except the erythrocyte sedimentation rate.

5.   Correlation between the scan score and laboratory tests varied with disease location.

6.   In calculating the scan score, it is essential to separate the abnormal bowel uptake from the background activity.

7.   The scan score correlated with all laboratory tests generally accepted to reflect active gut inflammation except for the erythrocyte sedimentation rate.