title: Comparison between manual and semiautomated volumetric measurements of pituitary adenomas.
abstract: Linear measurements have many limitations. The aim of this study is to compare manual and semiautomated volumetric measurements of pituitary adenomas. Magnetic resonance imaging (MRI) scans of 38 patients with pituitary adenomas were analyzed. Preoperative MRI was acquired on a 1.5 T. MRI volumes of the pituitary adenomas were obtained by two methods: manual (MA) and semiautomated (SA). The concurrent validity for SA and MA methods on 38 patients in the form of correlation coefficient was 0.97 (p < 0.0001). The intraobserver and the interobserver correlation coefficients for SA volumes were both 0.98, as for the intraobserver MA volumes were 0.98. Although the results of both methods are comparable, analysis of volumetric measurements by SA method is more time-efficient than MA segmentation. Precision in volumetric measurement techniques is likely to increase reliability of posttherapeutic monitoring of pituitary adenomas.
authors.forename: Qasim
authors.initials: Q
authors.lastname: Al Hinai
authors.forename: Kelvin
authors.initials: K
authors.lastname: Mok
authors.forename: Anthony
authors.initials: A
authors.lastname: Zeitouni
authors.forename: Bruno
authors.initials: B
authors.lastname: Gagnon
authors.forename: Abdul Razag
authors.initials: AR
authors.lastname: Ajlan
authors.forename: Juan
authors.initials: J
authors.lastname: Rivera
authors.forename: Marc
authors.initials: M
authors.lastname: Tewfik
authors.forename: Denis
authors.initials: D
authors.lastname: Sirhan