title: [Frameless registration for chest SPECT and X-ray CT image by volume matching].
abstract: Image registration of functional (SPECT) and morphological (X-ray CT/MRI) images has been studied in order to improve the accuracy and the quality of the image diagnosis. This paper describes a new registration method for chest SPECT and X-ray CT images. Presented method is a frameless and automatic registration method which calculates a transformation matrix between two coordinate systems of image data by an optimization method. This registration method uses similar physical characteristics of X-ray CT and transmission CT image. The three-dimensional overlap of the body region is used for image matching. Precision evaluation and visual image evaluation were conducted. The result of the precision evaluation with a phantom and clinical data suggested the clinically acceptable robustness in registration procedure. Visual evaluation of registered images confirmed the usefulness of this method in clinical applications.
authors.affiliation: Medical Engineering Laboratory, Toshiba Corporation.
authors.forename: T
authors.initials: T
authors.lastname: Kihara
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: F
authors.initials: F
authors.lastname: Kinoshita
authors.forename: N
authors.initials: N
authors.lastname: Yui
mesh_terms: D000465:Algorithms; D006801:Humans; D019047:Phantoms, Imaging; D013902:Radiography, Thoracic; D013909:Thorax / Q000000981:diagnostic imaging*; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed