Preferred Label : Treatment Course Session Number;
NCIt related terms : Session Number In Course;
NCIt definition : The number of a treatment course session. A session is defined as the period of time
between when the patient enters the treatment room and when they leave it. If the
session is interrupted, for example if the machine goes down or the patient has to
leave the treatment room to use the restroom, then the session whole number is retained
and decimal values are used to indicate the sub-sessions when the patient returns
to the treatment room. Decimal increments are zero-based so session 1 and session
1.0 are identical. Sessions 1.0 and 1.1 would indicate that the entire dose intended
for delivery in session 1 had to be broken up into two sub-sessions 1.0 and 1.1. Similarly,
if delivery of the total dose intended for a session is broken up between two machines
e.g., half for the day on a photon machine and half for the day on a hadron machine,
then this would also be reflected in the two sub sessions 1.0 and 1.1.;
Alternative definition : OORO: Therapeutic radiation is delivered in a series of sessions. In most cases session
corresponds to the time from entry of the patient into the room until leaving to deliver
the total amount of radiation intended. In that case sessions are whole numbers e.g.
1, 2, 3. If the session is interrupted for example when the machine goes down or the
patient has to leave the treatment room to use the rest room then the session whole
number is retained and decimal values are used to indicate the sub sessions when the
patient returns to the treatment room. Decimal increments are zero based so session
1 and session 1.0 are identical. For example, 1.0 and 1.1 would indicate that the
entire dose intended for delivery in session 1 had to be broken up into two sub sessions
1.0 and 1.1 Similarly, if delivery of the total dose intended for a session is broken
up between two machines e.g., half for the day on a photon machine and half for the
day on a hadron machine, then this would also be reflected in the two sub sessions
1.0, 1.1. The Date Of Record and Age At Record correspond to the start of the session.;
NCI Metathesaurus CUI : CL1912688;
Origin ID : C192539;
UMLS CUI : C5785273;
Semantic type(s)
- concept_is_in_subset
