HP190 - RADIOTHERAPY DEPARTMENTS

1. This diagram shows the classes relevant to RADIOTHERAPY DEPARTMENTS.

2. A RADIOTHERAPY DEPARTMENT contains RADIOTHERAPY MACHINES for treatment, simulation or planning.

3. Each PATIENT may undergo one or more RADIOTHERAPY TREATMENT COURSES each comprising one or more FRACTIONS. A FRACTION is a set of EXPOSURES delivered to a PATIENT in the course of one visit to a RADIOTHERAPY DEPARTMENT as part of a RADIOTHERAPY TREATMENT COURSE. An EXPOSURE may be the single occasion on which a PATIENT is exposed to ionising radiation. For total body irradiation procedures the EXPOSURE may last for several hours.

4. The MACHINE OPERATIONAL PLAN is a prospective statement about the time each radiation and simulation machine is to be available for use or intended to be set aside for planned maintenance.

5. The use of each radiotherapy and simulation machine is measured retrospectively in terms of the time the machine was actually available and time spent on planned and unplanned maintenance. This is recorded on RADIOTHERAPY MACHINE AVAILABILITY.

6. The Reference Costs for radiotherapy services based upon Healthcare Resource Groups are derived from RADIOTHERAPY TREATMENT COURSES.