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The modular design of the corgi model allows the configuration of many conical ct applications. The model consists of a module with a diameter of 135 mm and a thickness of 40 mm per module. The test module contains high-resolution multi-axis, sensitivity and cone beam pseudonyms. The model allows one test module to be configured near the scanner x-ray beam centre and another test module to be located on the edge, thereby better understanding the changes within the scanned volume. Additional modules are used for flat and dose measurements。
Corgi body module english name: corgi phantom
Corgi body modelling is specifically designed to assess cone beam imaging systems。
The model can easily be configured into scanners of different sizes. The assembly pole allows 12 centimetres and 20 centimetres of z-axis configuration. All modules contain four holes, one at the centre and three at the outer perimeter for assembly poles or dose measurements。
The standard cgi014 configuration is used in two cgi006 image mass modules to assess the image quality of both imaging plane. Placing the modules in the centre and edges of the beams, respectively, allows access to relevant information on the overall performance of the scanning area. Cgi014 can be configured as a combination of five or three modules。
The cgi025 corgi dental module can be configured as a combination of three or two modules and contains a cgi006 image quality module。
An optional ring package extends the diameter of the corgi model to 16 cm or 20 cm. Of these, 20 cm ring packages can be used in conjunction with elliptical and circular catphan entangles。
Cone beam ct model, corgi cone beam ct model image quality module is used to assess the following:
Sensitivity
High resolution
° axis-bit plane
° body resolution
The cone shape
It's a malformation
° axis-bit plane
• z axis orientation
Sensitivity
The corgi model contains five optical determination plugins. Plug-in poles are 20 mm in diameter and one end is hemispheric. Plugins are made of polystyrene, nylon, polycarbonate, polystyrene and polyvinyl chloride。
High resolution
High-resolution measurements are calculated by the sensor pole through an edge extension function (edge spread effect). The internal and body resolution of the plane can be assessed by setting the edge within the x-y plane or rotating the edge 45° to obtain the x-y-z body resolution。
It's a fake
Cone beam pseudonym tests consist of two polytetrafluoroethylene (teflon) disks with a diameter of 25 mm, a thickness of 1 mm and a distance of 1. 5 mm between two discs. When the mould moves from the centre of the cone to the edge position, the dispersion of the ray beam leads to blurring of the discs in the direction of the z axis. This interference is assessed mathematically in the smári analysis。
Malformed
Six conical holes were processed precisely at the top and bottom of the image mass module to measure aberration in the three directions x, y and z。
Evenity and noise
The flat segment is used to measure the flatness and noise of the image. Cgi010 may also serve as the base unit of the corgi model, which has a screwhole for the installation of the rod connection。
Dose
The cti009 module contains the ctdi ion chamber with the central and three outer holes. Connected rods can easily be dismantled in order to perform peripheral dosage measurements at different locations。