A slice geometry phantom for cross sectional tomographic imagers

Abstract

This investigation presents the design and fabrication of a magnetic resonance imaging (MRI) test phantom for determining slice thickness, slice adjacency, slice offset, and slice angulation. This test phantom is a three-dimensional conic section of MRI image producing material; proper orientation allows analysis in each of the major imaging planes. The phantom design (geometrical configuration) incorporates both theoretical and quantitative methodologies. The necessary mathematical analyses are both simple and rapid. In addition, this phantom has been successfully used to assess the image slice parameters for computed tomography (CT) scanners and single photon emission computed tomography (SPECT) imaging systems. Slice profile parameter results, full width at half maximum (FWHM), from this phantom design are compared with conventional methods.

Artefacts in multi-echoT2imaging for high-precision gel dosimetry: II. Analysis ofB1-field inhomogeneity

“…with t expressed in seconds. Other single-slice phantoms have been widely described (Chui et al 1985, Coffey et al 1989, Lerski and De Certaines 1993, Lerski 1993, McRobbie et al 1986, Sano and Dixon 1986, Price et al 1990. Their disadvantage, however, is that a physical convolution occurs with a non-zero thickness (Selikson and Fearon 1988).…”

An innovative phantom for quantitative and qualitative investigation of advanced x-ray imaging technologies

“…For example, Coffey and others have developed flexible head and body phantoms for guidance and dosimetry in radiosurgery (Coffey et al 1993, Duggan andCoffey 1996). Multi-modality phantoms for quantitative assessment of imaging performance (Coffey et al 1989), assessment of image quality in tissue-mimicking contexts (D'Souza et al 2001) and geometric cross-registration (Cloutier et al 2004) require carefully selected materials and configuration. Phantoms designed for imaging and guidance, for example MR-guided thermal therapy (McDonald et al 2004), are clearly an important aspect of current work in image-guided interventions.…”