Intermediate
Technical
IVT
isodose
Pronunciation: EYE-so-dose
Lines or surfaces connecting points of equal radiation dose in treatment planning displays.
Full Definition
Isodose lines or curves represent points of equal radiation dose within the patient's anatomy, typically displayed as contour lines on treatment planning images. These visualizations help radiation oncologists and medical physicists evaluate dose distribution, ensure adequate target coverage, and verify that dose constraints to organs at risk are met. Isodose curves are usually expressed as percentages of the prescription dose.
Usage
Usage note: Can function as both noun and adjective (isodose curve, isodose distribution).
In Context
- "The 95% isodose line encompasses the entire planning target volume." — Plan evaluation
- "Tight isodose gradients indicate good conformality to the target." — Technical assessment
Also known as
isodose lines
isodose curves
Don't confuse with
dose gradient
dose volume histogram