A novel design method for L-shaped SPECT probes

Abstract

This invention discloses a novel L-shaped SPECT probe design method, relating to the field of SPECT probe design. It includes the following steps: S1: Determine the position of the L-shaped gantry based on the patient's clinical requirements, and design an L-shaped slide rail according to the L-shaped gantry; S2: The SPECT probes are evenly arranged on the L-shaped slide rail, and the SPECT probes are driven by a motor; S3: The SPECT probes compensate for the acquisition dead zones between them by changing their position left and right on the L-shaped slide rail. Furthermore, the SPECT probes can enter different position modes by changing the forward and backward displacement of the L-shaped slide rail. This invention provides a novel L-shaped SPECT probe design method that can meet the clinical needs of patients with dextrocardia, obesity, and claustrophobia; the acquisition method conforms to the patient's body structure, improves the acquisition count and the amount of acquired information, enhances spatial resolution, and improves the accuracy of image quality.

Description

Technical Field

[0001] This invention belongs to the field of SPECT probe design, and in particular relates to a novel L-shaped SPECT probe design method. Background Technology

[0002] Currently, most traditional SPECT probes on the market are dual (or multi) SPECT probes, using 400mm*400mm flat panel SPECT probes. Due to their large size, a huge gantry needs to be designed to meet their rotation requirements. The design of a large robotic arm requires slow movement to complete high-precision work while ensuring safety, which is very inconvenient. Moreover, each rotation of the SPECT probe takes 30-60 seconds, which not only prolongs the patient's scanning time but also increases the difficulty of registration between mechanical positions. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0004] This invention provides a novel L-shaped SPECT probe design method, which addresses issues such as long acquisition time, low data acquisition volume, low spatial resolution, and poor image quality. The method specifically includes the following steps:

[0005] S1: Determine the location of the L-shaped rack based on the patient's clinical requirements, and design L-shaped slide rails according to the L-shaped rack;

[0006] S2: SPECT probes are evenly arranged on an L-shaped slide rail, and the SPECT probes are driven by a motor;

[0007] S3: The SPECT probe can compensate for the acquisition dead zone between SPECT probes by changing its position left and right on the L-shaped slide rail. In addition, the SPECT probe can enter different position modes by changing its position forward and backward on the L-shaped slide rail.

[0008] S4: During the acquisition process, the SPECT probe slides on the L-shaped slide rail, which confines the detected photons to a position perpendicular to the SPECT probe, thus enabling tomographic imaging and image reconstruction.

[0009] In some embodiments of the present invention, the reconstructed images in step S4 are 1 to n images.

[0010] In some embodiments of the present invention, the motor is controlled by a stepper motor and is fixed on an L-shaped frame.

[0011] In some embodiments of the present invention, the L-shaped frame is shaped to fit the patient's body structure, and the L-shaped slide rail is fixed on the L-shaped frame.

[0012] In some embodiments of the present invention, the L-shaped slide rail is made of stainless steel.

[0013] In some embodiments of the present invention, the L-shaped slide rail adopts a sliding motion mode to eliminate collisions and image artifacts of the SPECT acquisition probe caused by the moving detector.

[0014] In some embodiments of the present invention, the different position modes include the following two:

[0015] The SPECT probe slides forward on the L-shaped slide rail;

[0016] The SPECT probe slides backward on the L-shaped slide rail.

[0017] In some embodiments of the present invention, the SPECT probe slides forward on an L-shaped slide rail and is positioned near the patient positioning area A. At this point, the SPECT probe is in acquisition mode and obtains the count rate and count.

[0018] In some embodiments of the present invention, when the SPECT probe slides backward on the slide rail and is positioned at position B, which is far from the patient positioning area, the SPECT probe is in engineer mode and the SPECT probe is far from the L-shaped gantry housing.

[0019] In some embodiments of the present invention, the SPECT probe is moved left and right, and the collected position data of the line source is calculated to obtain the position information of the line source.

[0020] The present invention has the following beneficial effects:

[0021] 1. Compared to the traditional dual SPECT probe design, the L-shaped SPECT probe design can meet clinical needs. The L-shaped gantry can meet the clinical needs of patients with dextrocardia, obesity, claustrophobia, etc. The acquisition method that conforms to the patient's body structure greatly improves the acquisition count and the amount of information acquired, enhances spatial resolution, and improves the accuracy of image quality.

[0022] 2. Compared to the traditional dual SPECT probe design, the movement of the L-shaped slide rail inside the "L"-shaped frame eliminates problems such as SPECT probe collision, insufficient acquisition, and image artifacts that may be caused by moving the detector.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart illustrating some embodiments of the present invention;

[0026] Figure 2 These are left and right schematic diagrams of the SPECT probe in some embodiments of the present invention;

[0027] Figure 3 These are schematic diagrams of the SPECT probe before and after some embodiments of the present invention;

[0028] Figure label:

[0029] 101-SPECT probe, 201-L type frame, 301-L type frame housing, 401-L type slide rail. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] Therefore, in some embodiments of the present invention, a novel L-shaped SPECT probe design method is provided, which can also effectively solve the above problems, specifically as follows:

[0032] like Figure 1 The present invention employs a novel L-shaped SPECT probe design method, comprising the following steps:

[0033] S1: Determine the position of the L-shaped rack 201 based on the patient's clinical requirements, and design the L-shaped slide rail 401 based on the L-shaped rack 201;

[0034] S2: SPECT probes 101 are evenly arranged on L-shaped slide rails 401, and the SPECT probes are driven by motors.

[0035] S3: The SPECT probe 101 can compensate for the acquisition dead zone between SPECT probes by changing its position left and right on the L-shaped slide rail 401. In addition, the SPECT probe can enter different position modes by changing the position of the L-shaped slide rail 401.

[0036] S4: During the acquisition process, the SPECT probe 101 slides on the L-shaped slide rail 401, which confines the detected photons to a position perpendicular to the SPECT probe, so as to achieve tomographic imaging and image reconstruction.

[0037] The technical solution of a novel L-type SPECT probe design method according to the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] like Figure 2 , Figure 3 As shown, in some embodiments of the present invention, the novel L-shaped SPECT probe 101 is evenly arranged on the L-shaped slide rail 401, the L-shaped frame 201 can fit closely to the patient's chest cavity, and the L-shaped slide rail 401 is fixed on the L-shaped frame 201 to acquire data from the patient's left posterior oblique position to the right anterior oblique position without rotating the detector around the patient.

[0039] In some embodiments of the present invention, compared with the traditional dual SPECT probe 101 design structure, the SPECT probe 101 design can meet clinical needs. The L-shaped gantry 201 can meet the clinical needs of patients with dextrocardia, obesity, claustrophobia, etc. The acquisition method that conforms to the patient's body structure can improve the acquisition count and the amount of acquired information, improve spatial resolution, and improve the accuracy of image quality.

[0040] In some embodiments of the present invention, the L-shaped slide rail 401 is made of stainless steel.

[0041] In some embodiments of the present invention, the L-shaped slide rail 401 employs a sliding motion to eliminate collisions and image artifacts caused by the moving detector to the SPECT probe 101.

[0042] like Figure 2 As shown, in some embodiments of the present invention, the SPECT probe 101 moves left and right on the L-shaped slide rail 401: the solid frame represents the SPECT probe 101 that collects data on the slide rail for the first time, and the dashed frame represents the SPECT probe 101 that collects data on the slide rail for the second time. When the SPECT probe 101 completes the acquisition of the solid frame, there are many dead zones between each solid frame SPECT probe 101 that have not been acquired. At this time, the L-shaped slide rail 401 moves left and right, causing all SPECT probes 101 to move to the position of the dashed frame and acquire data again. This makes up for the acquisition dead zones, making the acquired data more complete and accurate.

[0043] In some embodiments of the present invention, the SPECT probe 101 is displaced left and right, and the collected position source data is calculated to obtain the position information of the line source.

[0044] like Figure 3As shown in some embodiments of the present invention, the SPECT probe 101 moves back and forth on the L-shaped slide rail 401: When the SPECT probe 101 slides forward on the L-shaped slide rail 401 and is positioned close to the patient positioning area A, the SPECT probe 101 is in acquisition mode. At this time, the SPECT probe 101 is closer to the patient's chest cavity, which can obtain a larger count rate and more counts; When the SPECT probe 101 slides backward on the L-shaped slide rail 401 and is positioned far away from the patient positioning area B, the SPECT probe 101 is in engineer mode. At this time, the SPECT probe 101 is far away from the L-shaped rack housing 301. After disassembling the L-shaped rack housing 301, the area of ​​the SPECT probe 101 exposed to the outside is larger, which facilitates the engineer to perform maintenance and repair of the SPECT probe 101.

[0045] In some embodiments of the present invention, the motor drive is a stepper motor control, and the motor is fixed on the L-shaped frame 201.

[0046] In some embodiments of the present invention, the trajectory of the SPECT probe 101 rotating around the human body during tomographic imaging has a significant impact on the image reconstruction quality. The cross-section of the human body is approximately elliptical, while the trajectory of a traditional SPECT probe 101 rotating around the human body is circular. The change in the distance between the surface of the SPECT probe 101 and the surface of the human body during rotation significantly affects the resolution of the reconstructed image. Furthermore, most traditional SPECT probes 101 employ a dual-planar SPECT probe 101. Due to its excessively large size, different supports and motors are required to meet the movement requirements of the dual SPECT probes 101. This structural complexity makes the overall frame structure large and cumbersome, rather than ingenious.

[0047] In some embodiments of the present invention, to meet the high-count and high-reconstruction-resolution acquisition requirements of nuclear medicine cardiology, the structure of the SPECT probe 101 on the rack is simplified, allowing the SPECT probe 101 to abandon the rotation acquisition mode and reduce cardiac acquisition artifacts. A rationally designed distribution and arrangement structure of the SPECT probe 101, an appropriate number of SPECT probes 101, and an efficient acquisition motion mode allow the SPECT probe 101 to be closer to the patient for acquisition, reducing physical artifacts such as gamma photon attenuation and scattering, obtaining more effective counts, acquiring more effective information, and providing clinicians with accurate diagnostic images.

[0048] In some embodiments of the present invention, a novel L-shaped SPECT probe design method can be applied to the acquisition of organs such as the heart and kidneys. This design expands the patient population for examination and facilitates doctors to conduct more in-depth research on heart diseases. This design structure and acquisition mode can be applied to research modes such as dynamic acquisition and planar acquisition.

[0049] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "displacement," "fixed," "position," and "counting," etc., should be interpreted broadly. For example, "angle" can mean left, right, or forward; "fixed" can mean directly fixed or indirectly fixed through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A novel L-shaped SPECT probe design method, characterized in that, Includes the following steps: S1: Determine the position of the L-shaped rack (201) based on the patient's clinical requirements, and design the L-shaped slide rail (401) according to the L-shaped rack (201); S2: SPECT probes (101) are evenly arranged on L-shaped slide rails (401), and SPECT probes (101) are driven by motors; S3: The SPECT probe (101) compensates for the acquisition dead zone between the SPECT probes (101) by changing its position left and right on the L-shaped slide rail (401). In addition, the SPECT probe (101) can enter different position modes by changing its position forward and backward on the L-shaped slide rail (401). The different position modes include the following two: the SPECT probe (101) slides forward on the L-shaped slide rail (401); the SPECT probe (101) slides backward on the L-shaped slide rail (401). 01) Slide backward; the SPECT probe (101) slides forward on the L-shaped slide rail (401) and is positioned close to the patient positioning area A. At this position, the SPECT probe (101) is in acquisition mode and obtains the count rate and count; the SPECT probe (101) slides backward on the L-shaped slide rail (401) and is positioned far away from the patient positioning area B. At this position, the SPECT probe (101) is in engineer mode and is far away from the L-shaped frame housing (301). S4: During the acquisition process, the SPECT probe (101) slides on the L-shaped slide rail (401) to confine the detected photons to a position perpendicular to the SPECT probe (101). The SPECT probe (101) acquires data from the patient's left posterior oblique position to the right anterior oblique position along the L-shaped slide rail (401) fixed on the L-shaped frame (201). Tomographic imaging and image reconstruction can be achieved without rotating the SPECT probe (101) around the patient. The SPECT probe (101) moves left and right to calculate the positional data of the acquired positional sources and obtain the positional information of the line sources.

2. The novel L-shaped SPECT probe design method according to claim 1, characterized in that: The reconstructed images in step S4 are 1 to n images.

3. The novel L-shaped SPECT probe design method according to claim 1, characterized in that: The motor is controlled by a stepper motor and is fixed on an L-shaped frame (201).

4. The novel L-shaped SPECT probe design method according to claim 3, characterized in that: The L-shaped frame (201) is shaped to fit the patient's body structure, and the L-shaped slide rail (401) is fixed on the L-shaped frame (201).

5. The novel L-shaped SPECT probe design method according to claim 4, characterized in that: The L-shaped slide rail (401) is made of stainless steel.

6. The novel L-shaped SPECT probe design method according to claim 5, characterized in that: The L-shaped slide rail (401) adopts a sliding motion mode to eliminate collisions and image artifacts caused by the moving detector in the SPECT acquisition probe.

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