Isodose


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Isodose

 

isodose curve (radiobiology), the line on a diagram of the irradiation of an organism that connects the points of the irradiated organism at which identical doses of ionizing radiation have been absorbed. A series of such lines makes possible a graphic representation of the way in which the absorbed dose decreases in the body tissues along the path of the rays. Isodose diagrams are usually used in radiation therapy of malignant tumors to calculate how to apply the largest possible dose to the

tumor with maximum protection of the surrounding tissues.

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References in periodicals archive ?
8 mCi, reference isodose curves/surfaces could not completely “wrap” the target volume around the stent.
Dose distribution scheme of isodose curves was observed to compare both applicators.
The radiation dose prescribed was between 70% and 80% of the isodose lines.
The median marginal dose to the meningioma was 14Gy (range 12-30), maximum dose to the meningioma was 28Gy (range 24-60), and the median 50% isodose line was 50% (range 50-80).
Long E Sinarquista Long I isoclasite Long O isodose
The isodose curves demonstrated a highly conformal dose distribution that closely matched the surface contour of the balloon-filled resection cavity without generating unacceptable hot spots.
This is called the isodose concept of tumoricidal radiotherapy).
2] Doses of 14 to 15 Gy to the 90% isodose curve were given over a period of 10 fractions.
Users optimize treatment plans by making adjustments in the position of the radiation sources while observing the computed dose distribution, which is usually displayed as an isodose contour map superimposed over a cross-sectional view of the patient's anatomy.
We can visualize the isodose lines simultaneously as we trace them and the dynamic shaping makes dose planning much simpler.
The conformity of the plans was measured using the CI, calculated as the ratio between the volume of the reference isodose (V[sub]95%) and the PTV volume (V[sub]PTV, V[sub]95%/V[sub]PTV).
A dose of 22 Gy was prescribed to the 56% isodose and delivered in three fractions on the nidus at C1 level, and 18 Gy was prescribed to the 60% isodose and delivered in two fractions on the nidus at C2 level.