EPID
Pronunciation: EE-pid
Also written as: EPID — Electronic Portal Imaging Device
Electronic Portal Imaging Device - digital detector system for treatment verification and patient positioning.
Full Definition
Electronic Portal Imaging Devices are sophisticated digital imaging systems integrated with linear accelerators to provide real-time verification of treatment delivery and patient positioning. EPIDs capture megavoltage portal images during treatment, enabling radiation therapists and physicists to verify field placement, monitor patient setup accuracy, and detect anatomical changes throughout the treatment course. Modern EPIDs utilize flat-panel detector technology and can perform advanced functions including dose verification and adaptive radiation therapy protocols.
Usage
Usage note: Typically used as an acronym; spell out on first use in formal documents.
In Context
- "Daily EPID images confirmed accurate patient positioning throughout the treatment course." — Treatment delivery record
- "The EPID detected a 3mm setup error requiring immediate correction." — Quality assurance incident report