title: Conformity index: a review.
abstract: We present a critical analysis of the conformity indices described in the literature and an evaluation of their field of application. Three-dimensional conformal radiotherapy, with or without intensity modulation, is based on medical imaging techniques, three-dimensional dosimetry software, compression accessories, and verification procedures. It consists of delineating target volumes and critical healthy tissues to select the best combination of beams. This approach allows better adaptation of the isodose to the tumor volume, while limiting irradiation of healthy tissues. Tools must be developed to evaluate the quality of proposed treatment plans. Dosimetry software provides the dose distribution in each CT section and dose-volume histograms without really indicating the degree of conformity. The conformity index is a complementary tool that attributes a score to a treatment plan or that can compare several treatment plans for the same patient. The future of conformal index in everyday practice therefore remains unclear.
authors.affiliation: Institut Curie, Orsay, France. loic.feuvret@cpo.curie.net
authors.forename: Loïc
authors.initials: L
authors.lastname: Feuvret
authors.forename: Georges
authors.initials: G
authors.lastname: Noël
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Mazeron
authors.forename: Pierre
authors.initials: P
authors.lastname: Bey
mesh_terms: D000465:Algorithms; D001165:Arteriovenous Malformations / Q000532:radiotherapy; D001918:Brachytherapy / Q000379:methods / Q000592:standards; D002985:Clinical Protocols / Q000592:standards*; D011832:Radiation Injuries / Q000517:prevention & control; D011879:Radiotherapy Dosage / Q000592:standards*; D020266:Radiotherapy, Conformal / Q000379:methods / Q000592:standards*; D012016:Reference Values; D013238:Stereotaxic Techniques / Q000592:standards*; D013679:Technology, Radiologic / Q000379:methods / Q000592:standards