The Astroid patient data model uses a hierarchy of items to model the real world workflow patterns of the radiotherapy treatment process. Please refer to the Heirarchy (Data Model) page if you are not familiar with these concepts.

During patient creation (i.e. Importing) a patient record is created containing a Course and a Patient Model. During Import the required data for the Course and Patient Model are entered, however, the Course remains incomplete. The Course will still require physician directive information including the breakdown of the treatment Prescriptions and (optionally) the specification of Clinical Goals. Before creating a Plan this information must be entered. Once the Prescription is complete, plans can be created. The following sections provide a walk through for completing the Course information.

1. From the Patient list, select a patient to be opened by clicking the patient row
2. The patient will open to the patient overview task and a message will appear telling the user to complete the Prescription information
3. The Prescription information is part of the Course, which can be edited by clicking on the blue edit button beside the Course label in the patient overview
4. The Course Prescription information is mandatory to fill out in order to proceed with planning and at a minimum one Prescription must be created (Clinical Goals are optional)
5. The Course contains some basic information as well as two blocks of data: Clinical Goals and Prescriptions
6. Clinical Goals are used fill in the “goals” (objectives) the physician would like to see achieved by the plan
   1. To add a goal, simply select click Add Structure and select a desired structure (the choices in the structure drop down will be set by the treatment site template) to which goals should be added
   2. The user can create goals for tumor volumes as well as Organs at Risk (OAR) and can specify minimum dose, maximum dose, mean dose, and volume based (DVH) goal types
   3. The Clinical Goals will be used for reporting purposes to describe the physician's intent for the treatment; these do not affect the calculation or plan directly
7. The second major part of the Course are the Prescriptions
   1. This is where the user will fill in the number of fractions and the prescription dose that specified by the physician
   2. Note that a phase must be created in order to start the planning process
8. Click New Phase under Phases to create a new empty phase
   1. The Phase label and description are free text fields that the user can enter to help identify a particular phase as needed
   2. A color may be selected for the Phase to aid in identification as well
   3. The number of fractions to be treated should entered and at least one Prescription value must be added (the choices available in the structure drop down will be only the targets from the selected treatment site template)
   4. Once all Phase information has been entered, click the blue Done button to complete the Phase
9. Additional phases may be added at this point if needed (for example, for a treatment needing a base treatment and a boost)
10. The Directive should now be complete
    1. Click on the patient's name in the top row (breadcrumbs) to return back to the Patient Overview

1. The Snapshot generally does not require editing at this time (see Snapshots for more information) so the user can now proceed on to creating a Request
2. To add a Request click on the blue Add Request link underneath the Snapshot
   1. This will create a default Request that treats all Fractions for all Phases in the Directive
   2. If this requires modification, then click on the blue open button to open the Request then click Edit to start editing
   3. Phases may be added, removed, or fraction counts modified using the provided controls (the user can choose whether all fractions [All] are going to be implemented in this phase or if just a certain number [Count]).
   4. When editing is complete, click the blue Ok button at the bottom of the column to save your changes
   5. Now click on the patient name to go back to the Patient Overview