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AIM 4.0 has fifty-five new classes. Twelve classes were renamed and four were deleted. This document describes changes from the AIM 3.0 to the AIM 4.0 foundation information model. Descriptions of the new classes follow.

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LesionObservationEntity (RadOnc)

The class is an abstract class stores observations made about lesions in both clinical trial and day-to-day clinical treatments. For detailed informatio, see DICOM Clinical Trials Results Reporting Supplement (Working group 18).

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GeneralLesionObservationEntity (RadOnc)

This class contains general observations made about lesions in clinical trial results and day-to-day clinical treatment that are not specific to time point. For detailed information, see DICOM Clinical Trials Results Reporting Supplement (Working group 18).

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TimePointLesionObservationEntity (RadOnc)

This class contains observations made about lesions in day-to-day clinical interpretations and clinical trial results at a specific time point. It also includes “lesions” that are created for the purpose of calibrating scanned film or other secondary capture images. For detailed information, see DICOM Clinical Trials Results Reporting Supplement (Working group 18).

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