Crystal strip position correction method for medical imaging equipment
A technology of medical imaging and correction method, applied in the field of medical imaging, can solve the problems of difficult to directly measure its actual spatial position and installation error, and achieve the effect of improving accuracy
Active Publication Date: 2019-07-19
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology
Detectors are generally based on modular assembly and installation. In the assembly process of small array units, the installation error of a single detector position is easier to control and measure in a direct physical way; the deformation and position error of the overall rack can also be measured by direct physical methods. However, during the process of installing the large array unit into the rack and after the whole machine is installed, the detector modules are blocked by the rack and are closely connected between the two, so it is difficult to use direct methods to measure their actual spatial positions and installation errors
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[0047] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0048] figure 1 It is a schematic structural diagram of medical equipment in an embodiment of the present invention. In this embodiment, PET equipment is taken as an example for description. Such as figure 1 As shown, the PET apparatus 1 has a control unit 10 as a center, and includes a frame 20 , a signal processing unit 30 , a coincidence unit 40 , a storage unit 50 , a reconstruction unit 60 , a display unit 70 and an operation unit 80 .
[0049] figure 2 It is a schematic cross-sectional view of the detector ring 100 configured on the rack 20 . Such as figure 2 As shown, the gantry 20 has a plurality of detector rings 100 arranged along the central axis Z of the circumference. The detector ring 100 has a plurality of detect...
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The invention provides a method for correcting the position of a crystal bar of a medical imaging device. The method comprises the following steps: respectively acquiring the sample data received by each pair of opposite crystal bars in two oppositely arranged detection blocks; acquiring a practical conforming pore diameter response curve of each pair of opposite crystal bars and a peak value position thereof according to the sample data received by each pair of opposite crystal bars; acquiring an analyzed conforming pore diameter response curve of each pair of opposite crystal bars and the peak value position thereof according to the positions of the crystal bars; and respectively acquiring an error between the peak value positions of the practical conforming pore diameter response curve and a theoretical conforming pore diameter response curve of each pair of opposite crystal bars, and updating the positions of each pair of opposite crystal bars according to the error. The method provided by the invention can be used for solving the problem that a direct method is difficult to be utilized to measure a practical space position and a mounting error because the detector modules are isolated by a frame and every two detector modules are tightly jointed, and the system matrix accuracy is effectively increased.
Description
technical field [0001] The present application relates to the technical field of medical imaging, in particular to a method for correcting the position of a crystal strip of a medical imaging device. Background technique [0002] In recent years, the use of medical imaging equipment to assist doctors in diagnosing patients has become the development trend of modern medical diagnosis. Commonly used medical imaging equipment includes positron emission tomography (Positron Emission Tomography, PET) equipment, computed tomography (Computed tomography, CT) equipment, single photon emission tomography (Singlepositron emission computed tomography, SPECT) equipment, magnetic resonance imaging ( Magneticresonance, MR) equipment, PET-CT, PET-MR, etc. Taking radiation detectors such as PET and CT as examples, the core structure of the system is the probe, which is composed of dense detectors arranged in a certain way, followed by electronic circuits and data processing devices related...
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IPC IPC(8): A61B6/03A61B5/055
CPCA61B5/0035A61B5/055A61B6/032A61B6/037A61B6/5235A61B6/5247A61B6/582
Inventor 樊馨唐嵩松
Owner SHANGHAI UNITED IMAGING HEALTHCARE