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Magphan smr100 mri module, magphan smr100 mri test cube: a cube test measuring 10 cm of the mass of the image used in the cylinder and the spherical magphan. The test cube is made of 6 mm thick polycarbonate plastics with an outer diameter of 10 cm. The test cube consists of a slice thickness slope, a sense measuring bottle, a high resolution test panel and a low contrast disk。
Magphan smr100 mri module, magphan smr100 mri module configuration: test cube panels can be assembled with a standard 2-d configuration, with a two-relative slice thickness slope, allowing operators to quickly verify the z-axis to be accurately vertically aligned with the image flat. The nylon screws fixes the unit together so that you can change the side of the test plate or cube to a three-dimensional structure. 3-d consists of geometry of x, y and z slices that can be collected from a single data。
Magphan smr100 mri module, summary of magphan smr100 mri test
Test the functions contained in the cube and in the model shell allows a full test of the maximum achievable key mri scanner parameters. The main components and tests they support are listed below。
Slice thickness slope
- model position
- scan the slice width
- multi-slice spacing and proximity
- patient alignment (3d)
- table incremental accuracy
Sensitometry
- t1 measurements
- t2 measurements
High resolution test board
- high resolution measurements (1-11 lines per cent)
- geometric distortion
Multi-dimensional data sets supporting disks
- geometric distortion
- pixels (matrix) size verification。
Shell
- space evenness
- noise
- sphere geometry
- in vitro sample testing
- round symmetry
10 cm sphere (optional)
- magnetic field balance
- consistency characteristics
- round symmetry
Magphan smr100 mri module, magphan smr100 mri module
Cut thickness slope: the slice thickness slope is installed outside the test cube. The slope thickness is 2 mm, the width is 10 mm, and the angle of the axis at 14° with the module provides a fourfold magnification factor for the measuring of the width. Relative slopes intersect at the centre of the cube test plane for alignment verification. The slope can be used to test the index between the fragments in the multilayer sequence and to test the table increment for accuracy。
Sensitivity determination vials: sensitivity determination samples are stored in four cylinder vials with an outer diameter of 1. 9 cm and an internal diameter of 1. 6 cm. The end of 0. 6 cm (1/4 inch) on the outer side of a cube allows for the filling of solutions in vials for t1 and t2 measurements。
High-resolution test panel: the high-resolution measurer is cut into a 2 mm thick acrylic acid plate supported by a channel in the test cube. High-resolution tests were performed using a series of rectangular tanks, with a scale of 1 to 11 lines per centimetre (5 mm to 0. 45 mm resolution). The length of the test slot between one and four lines per centimetre is 1. 25 cm and the length of the test is 0. 9 cm, involving a line of 5 to 11 cm。
In order to test geometrical distortions (spacelinear), the 3mm hole is split between 2 cm, 4 cm and 8 cm square pattern. Measuring the distance between these holes allows the system to be assessed for geometry。
Low contrast cd-rom: low contrast sensitivity is performed on cd-roms installed at the bottom of the test cube. Circle dents in disk generate low contrast images on average by volume. The depths of the four groups of three circular dents were 0. 5 mm, 0. 75, 1. 0 mm and 2. 0 mm, respectively, with a diameter of 4 mm, 6 mm and 10 mm, respectively。
Cube support disk: two cube support disks fixes the cube within the matrix shell and can be easily installed and removed. In addition to fixing the position of the cube, the support disk provides information on spatial linear measurements。
Geometric distortion is tested by measuring magphan's diameter in x and y direction. Geometric variants can also be assessed by measuring the distance between the 8 cm, 10 cm and 3 mc of the 12 cm square。
Shell: the shell component consists of the shell and the cube support plate (the 10-cm test cube). A full spatial homogeneity measure can be used for the model shell and the cubes and supporting discs will be tested and removed. The shell is easily cleaned and the use of gel and liquid solutions is permitted. When draining, multiple ports allow unrestricted flow。
Note: magphan module does not provide contrast fill solutions. Clients need to add their own fill solutions。
10 cm sphere (optional): selective bodies 10 cm in diameter can be installed in 20 cm or used separately. The sphere is very useful for testing the magnetic field homogeneity and homogeneity of the mri scanner. The magnetic field is expressed in a fraction of a million diagonal symmetrical volume (dsv)。
Patent sphere design
Magphan's proprietary spherical design aligns the spherical geometry with the cubic geometry. The natural magnetic field extends to the diagonal symmetrical volume (dsv) or spherical body as a result of the mapping of magnetic field properties based on the harmonic function of the ball. This symmetricality is the reason why the aapm task force report no. 6a, entitled “accept and acceptance test of the mri imaging system”, recommends a spherical shape. Imaging performance is assessed through the rotational sphere in the cross-axis, coronal, vector and slant. Magphan also has a traditional cylinder shell for testing teams and manufacturers whose performance specifications are based on cylinder models。
| Magphan model selection | |
| Item# | Description |
| Smr100 | Magphan 100 - full magphan includes a 20 cm spherical shell, 10 cm to test the cube and condition。 |
| Smr140 | Magphan 140 - 10 cm sphere supports disks。 |
| Smr170 | Magphan 170 - full magphan includes 20 cm cylinder shell, 10 cm test tube and condition。 |
| Smr 172 | Magphan 172 - full magphan consists of 20 cm spherical shell, 20 cm cylindrical shell, 10 cm test tubes and boxes。 |