Signal correction method, readout method, device, detector, and imaging apparatus

Abstract

The disclosure provides a signal correction method, a readout method, a device, a detector and an imaging device. The signal correction method comprises: applying a preset charge amount to a readout capacitor to obtain capacitor data corresponding to the preset charge amount; the size of the preset charge amount is adjustable; the capacitor data comprises: the total number of flips of the readout capacitor during the application of the preset charge amount and the potential difference of the readout capacitor before and after the application of the preset charge amount; for each capacitor data, the charge capacity of the readout capacitor is determined according to the preset charge amount, the total number of flips and the potential difference; and a corresponding relationship between the total number of flips and the charge capacity is constructed, and the corresponding relationship is used to correct the signal collected by the readout circuit. By correcting the capacitor capacity of the readout capacitor during the signal readout process, the charge capacity changed during the imaging process is determined, and the accuracy of signal readout is improved, thereby improving the imaging quality.

Description

Technical Field

[0001] The present disclosure relates to the field of imaging, and in particular to a signal correction method, a readout method, a device, a detector, and an imaging device. Background Art

[0002] In a CT (computed tomography) system, an EID (energy integrating detector) uses an ASIC (application-specific integrated circuit chip) to measure the total charge at each pixel position within a certain time interval to determine the signal collected at each pixel position.

[0003] Because CT systems require ASICs with high precision and a wide measurement range, the charge capacity of the ASIC's readout capacitor, Cf, must be significantly smaller than the integrated charge during each imaging session when designing the chip's analog front-end (reset preamplifier). Therefore, within a single integration interval, the readout capacitor's potential may flip multiple times, and the charge capacity corresponding to each flip will change with the input current. Therefore, using a uniform charge capacity to measure the total charge at each pixel location would result in inaccurate signal acquisition, affecting imaging results.

[0004] Public content

[0005] The technical problem to be solved by the present disclosure is to overcome the defect in the prior art that the charge capacity of the readout capacitor changes each time it is flipped, resulting in inaccurate imaging results, and to provide a signal correction method, imaging method, system, device and medium.

[0006] The present disclosure solves the above technical problems through the following technical solutions:

[0007] In a first aspect, a signal correction method is provided, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor, and the correction method includes:

[0008] Applying a preset charge to a readout capacitor to obtain capacitance data corresponding to the preset charge; wherein the preset charge is adjustable; and the capacitance data includes: a total number of flips of the readout capacitor during application of the preset charge and a potential difference of the readout capacitor before and after application of the preset charge;

[0009] For each capacitance data, determining the charge capacity of the readout capacitor according to the preset charge amount, the total number of flips and the potential difference;

[0010] A corresponding relationship between the total number of flips and the charge capacity is constructed, and the corresponding relationship is used to correct the signal collected by the readout circuit.

[0011] Optionally, the total number of flips includes the number of flips of the readout capacitor after the preset charge amount is applied each time.

[0012] Optionally, the potential difference is obtained by subtracting the potential of the readout capacitor after the preset charge amount is applied last time from the potential of the readout capacitor after the preset charge amount is applied each time.

[0013] Optionally, the preset charge amount includes at least one or more of a small charge amount that is less than half of a standard charge amount of the readout capacitor, and a large charge amount that is greater than half of a standard charge amount of the readout capacitor and less than the standard charge amount.

[0014] Optionally, establishing a corresponding relationship between the total number of flips and the charge capacity includes:

[0015] At least one set of corresponding data is selected from multiple sets of data on the total number of flips and charge capacity to construct a corresponding relationship between the total number of flips and charge capacity, where the charge capacity is positively correlated with the total number of flips.

[0016] In a second aspect, a signal readout method is provided, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor, and the readout method includes:

[0017] Obtaining the actual total number of flips and the actual potential difference before and after the readout capacitance;

[0018] Determining the actual charge capacity of the readout capacitor during each signal readout according to a corresponding relationship between the total number of flips and the charge capacity, wherein the corresponding relationship is determined according to the signal correction method described in the first aspect;

[0019] The total charge amount read by the readout circuit is determined according to the actual total number of flips, the potential difference before and after, and the actual charge capacity. The total charge amount is used to determine the signal collected by the readout circuit.

[0020] In a third aspect, a signal correction device is provided, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor, and the correction device further includes:

[0021] an application module, configured to apply a preset charge amount to the readout capacitor to obtain capacitance data corresponding to each preset charge amount; the preset charge amount is adjustable; the capacitance data includes: a total number of flips of the readout capacitor during application of the preset charge amount and a potential difference of the readout capacitor before and after application of the preset charge amount;

[0022] a first determining module, configured to determine, for each capacitance data, a charge capacity of the readout capacitor according to the preset charge amount, the total number of flips, and the potential difference;

[0023] A construction module is used to construct a corresponding relationship between the total number of flips and the charge capacity, and the corresponding relationship is used to correct the signal collected by the readout circuit.

[0024] In a fourth aspect, a signal readout device is provided, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor, and the readout device includes:

[0025] An acquisition module, configured to acquire an actual total number of flips and an actual potential difference before and after the readout capacitor;

[0026] a second determining module, configured to determine an actual charge capacity of the readout capacitor during each signal readout according to a corresponding relationship between the total number of flips and the charge capacity, wherein the corresponding relationship is determined according to the signal correction device according to the third aspect;

[0027] The third determination module is used to determine the total charge read by the readout circuit according to the actual total number of flips, the potential difference before and after, and the actual charge capacity, and the total charge is used to determine the signal collected by the readout circuit.

[0028] In a fifth aspect, a detector is provided, comprising: a scintillator unit, a detection unit, and a readout circuit;

[0029] The scintillator unit is connected to the detection unit, and the detection unit outputs the collected signal through the readout circuit;

[0030] The readout circuit corrects the collected signal using the signal correction method described in the first aspect, and / or reads the collected signal using the signal readout method described in the second aspect.

[0031] In a sixth aspect, an imaging device is provided, comprising the detector described in the fifth aspect.

[0032] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0033] The positive progress effect of the present disclosure is that: by applying an adjustable preset charge to the readout capacitor, the readout capacitor is flipped, and the corresponding relationship between the total number of flips and the capacitance during each application of the preset charge is determined based on the total number of flips and the potential difference measured during the reversal of the readout capacitor, the capacitance of the readout capacitor during the signal readout process is corrected to determine the charge capacity that changes during the imaging process, and the accuracy of the signal readout is improved, thereby improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the connection relationship of a readout circuit provided by an exemplary embodiment of the present disclosure;

[0035] Figure 2 A first flow chart of a signal correction method provided by an exemplary embodiment of the present disclosure;

[0036] Figure 3 A schematic diagram of a flipping of a readout capacitor provided by an exemplary embodiment of the present disclosure;

[0037] Figure 4 A schematic diagram showing the effect of different preset charge amounts on capacitor capacitance provided by an exemplary embodiment of the present disclosure;

[0038] Figure 5 A schematic diagram of a corresponding relationship provided for an exemplary embodiment of the present disclosure;

[0039] Figure 6 A second flow chart of a signal correction method provided by an exemplary embodiment of the present disclosure;

[0040] Figure 7 A flowchart of a signal reading method provided by an exemplary embodiment of the present disclosure;

[0041] Figure 8 A schematic structural diagram of a signal correction device provided by an exemplary embodiment of the present disclosure;

[0042] Figure 9 A schematic structural diagram of a signal reading device provided by an exemplary embodiment of the present disclosure;

[0043] Figure 10 A schematic structural diagram of a detector provided by an exemplary embodiment of the present disclosure;

[0044] Figure 11 The present invention provides a schematic structural diagram of an imaging device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present disclosure is further described below by way of exemplary embodiments, but the present disclosure is not limited to the scope of the embodiments.

[0046] Before describing the exemplary embodiments of the present disclosure in detail, a brief description of the readout circuit is given:

[0047] Figure 1 The readout circuit is used to read out the signal of each pixel position. qp Characterize the readout capacitance, D coarse Characterizes the number of flips of the readout capacitor each time a signal is read out, D fineCharacterizes the capacitance potential of the readout capacitor after the last flip of the readout capacitor when reading the signal. The total charge of the readout circuit is obtained based on the readout capacitance in the readout circuit: Total charge = D coarse *Charge capacity + D fine -D' fine , where D' fine This represents the capacitance potential of the readout capacitor after the last flip of the readout capacitor during the previous signal readout. The calculated total charge can be used to determine the signal captured by the readout circuit, which can be used to reconstruct the image. The charge capacity of the readout capacitor changes during the flipping process, so determining the charge capacity of the readout capacitor is crucial for signal determination and image reconstruction.

[0048] Based on the above background, the exemplary embodiments of the present disclosure provide a signal correction method, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor, see Figure 2 , the correction methods include:

[0049] S101 , applying a preset charge amount to a readout capacitor to obtain capacitance data corresponding to the preset charge amount.

[0050] The preset charge is adjustable, and the capacitance data includes the total number of flips in the readout capacitance during application of the preset charge and the potential difference between the readout capacitance before and after application of the preset charge. The potential difference is calculated by subtracting the potential of the readout capacitance after the previous application of the preset charge from the potential of the readout capacitance after each application of the preset charge.

[0051] In one embodiment, the preset charge is generally provided by a current source, which adjusts the preset charge through two adjustment gears, including a coarse adjustment gear and a fine adjustment gear. The coarse adjustment gear covers a value close to the standard charge of the read capacitor, and the fine adjustment gear covers a value close to half of the standard charge of the read capacitor. The standard charge can be the initial charge capacity of the read capacitor.

[0052] S102 : For each capacitance data, determine the charge capacity of the readout capacitor according to the preset charge amount, the total number of flips, and the potential difference.

[0053] The total number of flips includes the number of flips of the readout capacitor after each application of the preset charge. For example, if the readout capacitor flips 4 times after a preset charge is applied, the total number of flips is 4.

[0054] According to the above formula: total charge = D coarse *Charge capacity + D fine -D' fine Among them, the preset charge is equivalent to the total charge, D fine -D' fineEquivalent to the potential difference, when the above parameters are determined, the charge capacity of the readout capacitor under the total number of flips can be obtained by reversing the formula.

[0055] S103 , constructing a corresponding relationship between the total number of flips and the charge capacity, where the corresponding relationship is used to calibrate the signal collected by the readout circuit.

[0056] Specifically, the collected signal can be corrected by selecting the corresponding capacitance from the corresponding relationship according to the total number of flips read by the read capacitor during the signal reading process to obtain a more accurate total charge amount, thereby further improving the accuracy of signal reading.

[0057] In addition, in an ideal situation, the charge capacity can be derived based on the known input readout capacitance's preset charge, total number of flips, and potential difference. However, in actual use, due to differences in different detector channels, or see Figure 3 As shown, the preset charge applied for the n+2th time may not cause the readout capacitance to flip, that is, the total number of flips and the corresponding capacitance cannot be obtained. Therefore, in order to obtain a more accurate correspondence, at least two different sets of capacitance data are required.

[0058] See also Figure 4 In the figure, the vertical axis n / total represents the ratio between the number of times the capacitor fails to flip and the total number of times the preset charge is applied, and the horizontal axis wf_low-wf_high represents the specific value of the correction error under this ratio. As can be seen from the figure, when the ratio is 0.5, the correction error is at a low level. In other words, when the ratio of the number of times the capacitor fails to flip and the number of times the capacitor flips after applying the preset charge is 1:1, the accuracy of the correction error is higher.

[0059] Generally speaking, a current source can be used to provide at least two sets of preset charges of different sizes, including at least one or more of a small charge less than half the standard charge of the read capacitor and a large charge greater than half the standard charge of the read capacitor and less than the standard charge. The preset charge can be adjusted according to actual needs. Ideally, each set of preset charges applied to the read capacitor can cause the read capacitor to flip and not flip alternately in a 1:1 ratio. By providing at least two sets of preset charges of different sizes from the current source and screening at least two sets of capacitance data that meet the standards from the two sets of capacitance data with the preset charge, errors in the capacitance calibration process can be reduced.

[0060] In one embodiment, constructing the corresponding relationship between the total number of flips and the charge capacity in step S103 specifically includes:

[0061] At least one set of corresponding data is selected from multiple sets of data on the total number of flips and charge capacity to construct a corresponding relationship between the total number of flips and the charge capacity, and the charge capacity is positively correlated with the total number of flips.

[0062] Among them, at least one group is selected from the multiple groups of data on the total number of flips and the charge capacity obtained after each adjustment of the preset charge amount to establish a corresponding relationship.

[0063] In addition, the corresponding relationship can generally be represented by a slope, but is not limited thereto, and can be selected according to the actual application scenario. Figure 5 As shown, where Weighting_factor represents the charge capacity, D coarse Characterizing the total number of flips, we can get its slope.

[0064] In this embodiment, an adjustable preset charge amount is applied to the readout capacitor to cause the readout capacitor to flip, and the correspondence between the total number of flips and the capacitance during each application of the preset charge amount is determined based on the total number of flips and the potential difference measured during the reversal of the readout capacitor, so as to correct the capacitance of the readout capacitor during the signal readout process, determine the charge capacity that changes during the imaging process, improve the accuracy of the signal readout, and thereby improve the imaging quality.

[0065] The present embodiment is further described below by a specific implementation method. Figure 6 :

[0066] S201 , while keeping the coarse adjustment position of the current source unchanged, adjust the fine adjustment position of the current source to change the preset charge amount input to the readout capacitor, and obtain at least two sets of capacitance data.

[0067] S202 : Filter appropriate capacitance data from the two sets of capacitance data for analysis, and use the data as capacitance data for the coarse adjustment position.

[0068] S203 , adjusting the coarse adjustment gear of the current source, and changing the preset charge input to the readout capacitor by adjusting the coarse adjustment gear of the current source, and screening appropriate capacitance data to obtain capacitance data under the coarse adjustment gear.

[0069] S204 : For the two sets of capacitance data, a corresponding relationship between the total number of flips and capacitance is established.

[0070] In addition, it should be noted that the readout circuit at each pixel position can adopt the above steps to obtain the corresponding relationship, so as to perform targeted correction on each pixel position.

[0071] An exemplary embodiment of the present disclosure further provides a signal readout method, which is applied to a readout circuit, wherein the readout circuit includes a readout capacitor. Figure 7, the readout methods include:

[0072] S301, obtaining the actual total number of flips of the readout capacitance and the actual potential difference before and after;

[0073] S302 : Determine the actual charge capacity of the readout capacitor during each signal readout according to the corresponding relationship between the total number of flips and the charge capacity.

[0074] The corresponding relationship is determined according to the above-mentioned signal correction method, and the actual charge capacity corresponding to the actual total number of flips can be determined according to the corresponding relationship.

[0075] S303 , determining the total charge amount read by the readout circuit according to the actual total number of flips, the potential difference before and after, and the actual charge capacity.

[0076] The total charge is used to determine the signal collected by the readout circuit.

[0077] An exemplary embodiment of the present disclosure further provides a signal correction device, which is applied to a readout circuit. The readout circuit includes a readout capacitor. Figure 8 , the correction device also includes:

[0078] An application module 41 is configured to apply a preset charge amount to the readout capacitor to obtain capacitance data corresponding to each preset charge amount; the preset charge amount is adjustable; the capacitance data includes: a total number of flips of the readout capacitor during application of the preset charge amount and a potential difference between the readout capacitor before and after application of the preset charge amount;

[0079] A first determining module 42 is configured to determine the charge capacity of the readout capacitor according to a preset charge amount, a total number of flips, and a potential difference for each capacitance data;

[0080] The construction module 43 is used to construct a corresponding relationship between the total number of flips and the charge capacity, and the corresponding relationship is used to correct the signal collected by the readout circuit.

[0081] In one embodiment, the total number of flips includes the number of flips of the readout capacitance after each application of a predetermined charge amount.

[0082] In one embodiment, the potential difference is obtained by subtracting the potential of the readout capacitor after the preset charge amount is applied each time from the potential of the readout capacitor after the preset charge amount is applied last time.

[0083] In one embodiment, the preset charge amount includes at least one or more of a small charge amount less than half of a standard charge amount of the read capacitor and a large charge amount greater than half of a standard charge amount of the read capacitor and less than the standard charge amount.

[0084] In one embodiment, the construction module 43 is further configured to select at least one corresponding set of data from multiple sets of data on the total number of flips and charge capacity to construct a corresponding relationship between the total number of flips and charge capacity, wherein the charge capacity is positively correlated with the total number of flips.

[0085] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the partial description of the method embodiments. The system embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution.

[0086] An exemplary embodiment of the present disclosure further provides a signal readout device, which is applied to a readout circuit. The readout circuit includes a readout capacitor. Figure 9 , the readout device comprises:

[0087] An acquisition module 51 is used to acquire the actual total number of flips of the readout capacitor and the actual potential difference before and after;

[0088] A second determining module 52 is configured to determine the actual charge capacity of the readout capacitor during each signal readout based on a correspondence between the total number of flips and the charge capacity, the correspondence being determined based on the signal correction device of the third aspect;

[0089] The third determination module 53 is used to determine the total charge read by the readout circuit according to the actual total number of flips, the potential difference before and after, and the actual charge capacity. The total charge is used to determine the signal collected by the readout circuit.

[0090] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the partial description of the method embodiments. The system embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution.

[0091] An exemplary embodiment of the present disclosure further provides a detector, see Figure 10 The detector includes: a scintillator unit 61, a detection unit 62, and a readout circuit.

[0092] The scintillator unit 61 is connected to the detection unit 62 , and the detection unit 62 outputs the collected signal through a readout circuit.

[0093] The scintillator unit 61 irradiates light onto the object 64 , and the light is transmitted to the detection unit 62 , which outputs the collected signal through a readout circuit.

[0094] The readout circuit 63 can be seen in Figure 1 As shown, the readout circuit 63 corrects the collected signal using the signal correction method of the above embodiment, and / or reads the collected signal using the signal readout method.

[0095] An exemplary embodiment of the present disclosure further provides an imaging device, which includes the detector according to the above embodiment. Figure 11 The imaging device 70 shown is merely an example and should not bring any limitation to the functionality and scope of use of the embodiments of the present disclosure.

[0096] like Figure 11 As shown, the imaging device 70 may be a general-purpose computing device, such as a server device. Components of the imaging device 70 may include, but are not limited to, the at least one processor 71, the at least one memory 72, and a bus 73 connecting various system components (including the memory 72 and the processor 71).

[0097] The bus 73 includes a data bus, an address bus, and a control bus.

[0098] The memory 72 may include a volatile memory, such as a random access memory (RAM) 721 and / or a cache memory 722 , and may further include a read-only memory (ROM) 723 .

[0099] The memory 72 may also include a program tool 725 (or utility) having a set (at least one) of program modules 724, such program modules 724 including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include an implementation of a network environment.

[0100] The processor 71 executes various functional applications and data processing by running computer programs stored in the memory 72, such as the method provided in any of the above embodiments.

[0101] The imaging device 70 can also communicate with one or more external devices 74. Such communication can occur via an input / output (I / O) interface 76. Furthermore, the model-generated imaging device 70 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 76. As shown, the network adapter 76 communicates with other modules of the model-generated imaging device 70 via a bus 73. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with the model-generated imaging device 70, including but not limited to microcode, device drivers, redundant processors, external disk drive arrays, RAID (RAID) systems, tape drives, and data backup storage systems.

[0102] It should be noted that although the above detailed description refers to several units / modules or sub-units / modules of the imaging device, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present disclosure, the features and functions of two or more units / modules described above may be embodied in a single unit / module. Conversely, the features and functions of a single unit / module described above may be further divided and embodied by multiple units / modules.

[0103] An embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, which implements the method provided in any of the above embodiments when the program is executed by a processor.

[0104] The readable storage medium may include, but is not limited to, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0105] In a possible implementation manner, the embodiments of the present disclosure may also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute a method for implementing any of the above embodiments.

[0106] The program code for executing the present disclosure may be written in any combination of one or more programming languages, and may be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on the remote device.

[0107] While specific embodiments of the present disclosure have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, and such changes and modifications are intended to fall within the scope of protection of the present disclosure.

Claims

1. A signal correction method, characterized in that: Applied to a readout circuit, the readout circuit includes a readout capacitor, and the correction method includes: Applying a preset charge to a readout capacitor to obtain capacitance data corresponding to the preset charge; wherein the preset charge is adjustable; and the capacitance data includes: a total number of flips of the readout capacitor during application of the preset charge and a potential difference of the readout capacitor before and after application of the preset charge; For each capacitance data, determining the charge capacity of the readout capacitor according to the preset charge amount, the total number of flips and the potential difference; A corresponding relationship between the total number of flips and the charge capacity is constructed, and the corresponding relationship is used to correct the signal collected by the readout circuit.

2. The calibration method according to claim 1, wherein: The total number of flips includes the number of flips of the readout capacitor after the preset charge amount is applied each time.

3. The calibration method according to claim 1, wherein: The potential difference is obtained by subtracting the potential of the readout capacitor after the preset charge amount is applied last time from the potential of the readout capacitor after the preset charge amount is applied each time.

4. The calibration method according to claim 1, wherein: The preset charge amount includes at least one or more of a small charge amount that is less than half of a standard charge amount of the readout capacitor and a large charge amount that is greater than half of a standard charge amount of the readout capacitor and less than the standard charge amount.

5. The calibration method according to claim 1, wherein: Establishing a corresponding relationship between the total number of flips and the charge capacity includes: At least one set of corresponding data is selected from multiple sets of data on the total number of flips and charge capacity to construct a corresponding relationship between the total number of flips and charge capacity, where the charge capacity is positively correlated with the total number of flips.

6. A signal reading method, characterized in that: Applied to a readout circuit, the readout circuit includes a readout capacitor, and the readout method includes: Obtaining the actual total number of flips and the actual potential difference before and after the readout capacitance; determining the actual charge capacity of the readout capacitor during each signal readout according to a corresponding relationship between the total number of flips and the charge capacity, wherein the corresponding relationship is determined according to the signal correction method according to any one of claims 1 to 5; The total charge amount read by the readout circuit is determined according to the actual total number of flips, the potential difference before and after, and the actual charge capacity. The total charge amount is used to determine the signal collected by the readout circuit.

7. A signal correction device, characterized in that: Applied to a readout circuit, the readout circuit includes a readout capacitor, and the correction device further includes: an application module, configured to apply a preset charge amount to the readout capacitor to obtain capacitance data corresponding to each preset charge amount; the preset charge amount is adjustable; the capacitance data includes: a total number of flips of the readout capacitor during application of the preset charge amount and a potential difference of the readout capacitor before and after application of the preset charge amount; a first determining module, configured to determine, for each capacitance data, a charge capacity of the readout capacitor according to the preset charge amount, the total number of flips, and the potential difference; A construction module is used to construct a corresponding relationship between the total number of flips and the charge capacity, and the corresponding relationship is used to correct the signal collected by the readout circuit.

8. A signal reading device, characterized in that: Applied to a readout circuit, the readout circuit includes a readout capacitor, and the readout device includes: An acquisition module, configured to acquire an actual total number of flips and an actual potential difference before and after the readout capacitor; a second determining module, configured to determine an actual charge capacity of the readout capacitor during each signal readout according to a corresponding relationship between the total number of flips and the charge capacity, wherein the corresponding relationship is determined according to the signal correction device according to claim 7; The third determination module is used to determine the total charge read by the readout circuit according to the actual total number of flips, the potential difference before and after, and the actual charge capacity, and the total charge is used to determine the signal collected by the readout circuit.

9. A detector, characterized in that: The detector includes: a scintillator unit, a detection unit, and a readout circuit; The scintillator unit is connected to the detection unit, and the detection unit outputs the collected signal through the readout circuit; The readout circuit corrects the collected signal by the signal correction method according to any one of claims 1 to 5, and / or reads the collected signal by the signal readout method according to claim 6.

10. An imaging device, characterized in that: The imaging device comprises the detector according to claim 9.

Images