A circular collimator mounting structure

Abstract

The utility model discloses a kind of circular collimator mounting structures, it is related to medical instrument technical field, and circular collimator mounting structure, comprising: collimating cone cylinder, is provided with the first connecting part for fixedly connecting the circular collimator;Accessory rack, is provided with the second connecting part for fixedly connecting the medical accelerator and the third connecting part for cooperating installation the collimating cone cylinder;Wherein, the collimating cone cylinder includes information component, for storing the information corresponding to the collimating cone cylinder and / or the circular collimator, the accessory rack includes information identification component, for identifying the information of the information component, and send to the medical accelerator;The present circular collimator mounting structure, by respectively integrating information component and information identification component in collimating cone cylinder and accessory rack, reduce the risk of grating and collimator collision and the risk of circular collimator replacement error.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a circular collimator mounting structure. Background Technology

[0002] Stereotactic radiotherapy (SRT) is a high-precision radiotherapy technique that utilizes advanced imaging and computer technology to precisely locate the tumor and then focus a high dose of radiation precisely on the tumor site to kill tumor cells. A key feature of SRT is its ability to deliver a high dose of radiation to the tumor tissue while minimizing damage to surrounding healthy tissues. This treatment method offers advantages such as accurate localization, concentrated dose distribution, and good therapeutic effects. Compared to traditional radiotherapy, SRT has higher precision and can better protect surrounding healthy tissues and organs.

[0003] As multi-page grating technology has matured, it has become a standard configuration for medical accelerators. Stereotactic radiotherapy is often performed using multi-page gratings. However, during implementation, it was found that when performing stereotactic radiotherapy with small fields, the penumbra index of the small field does not meet the standard requirements due to the structural limitations of the multi-page grating. Therefore, the use of multi-page gratings for stereotactic radiotherapy has been limited.

[0004] The traditional circular collimator installation position has also been downgraded from the three-stage collimator under the accelerator treatment head to the four-stage collimator installed under the multi-page grating. This further reduces the treatment space of the accelerator and restricts the use of the traditional circular collimator. In order to solve the problem of treatment space, it was once attempted to install the circular collimator in reverse inside the grating.

[0005] However, the installation of traditional circular collimators lacks identification function, which increases the risk of collision between the grating and the collimator; the replacement of various cones of traditional circular collimators also lacks identification function, which poses a risk to medical staff replacing the circular collimator incorrectly.

[0006] In summary, how to reduce the risk of collision between the grating and the collimator and the risk of incorrect replacement of the circular collimator caused by the lack of recognition function in traditional circular collimators is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a circular collimator mounting structure, which integrates information components and information recognition components in the collimation cone and accessory frame respectively to identify the information of the circular collimator and / or the collimation cone, thereby reducing the risk of collision between the grating and the collimator and the risk of incorrect replacement of the circular collimator.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A circular collimator mounting structure for fixing a circular collimator to a medical accelerator;

[0010] The circular collimator mounting structure includes:

[0011] The collimating cone is provided with a first connecting part for fixing the circular collimator.

[0012] The accessory frame is provided with a second connecting part for fixing the medical accelerator and a third connecting part for cooperating in the installation of the collimating cone;

[0013] The collimation cone includes an information component for storing information corresponding to the collimation cone and / or the circular collimator, and the accessory frame includes an information recognition component for recognizing the information in the information component and sending it to the medical accelerator.

[0014] Preferably, the collimating cone includes an outer conical surface, the third connecting part includes an inner conical surface, and the outer conical surface and the inner conical surface have equal tapers;

[0015] When the collimating cone is installed in conjunction with the third connecting part, the outer cone surface abuts against the inner cone surface.

[0016] Preferably, the third connecting part includes an angle limiting component for limiting the relative rotation angle between the collimating cone and the third connecting part during installation.

[0017] Preferably, the information recognition component includes a plurality of contact switches, the information component includes a plurality of information points, and the positions and / or numbers of the information points are different in different information components;

[0018] When the collimating cone is installed in conjunction with the third connecting part, the contact switch that is in contact with the information point and the contact switch that is not in contact with the information point will give different instructions.

[0019] Preferably, the information recognition component further includes a base, the base including a mounting surface for abutting against the collimating cone;

[0020] The contact switch includes a pin and a detection switch. The pin is slidably mounted to the base. When the pin is at the first stroke end, one end of the pin extends outside the mounting surface. When the pin is at the second stroke end, the pin triggers the detection switch. The base is provided with an elastic element for driving the pin to slide to the first stroke end.

[0021] The information point includes a groove provided on the surface of the collimating cone. When the collimating cone abuts against the base, the collimating cone can drive the ejector pin that does not correspond to the position of the groove to slide to the second stroke end point.

[0022] Preferably, the groove is an arc-shaped groove, and the center of the arc-shaped groove overlaps with the rotation axis of the collimating cone. When the collimating cone rotates, the groove can continuously accommodate the ejector pin corresponding to its position.

[0023] Preferably, the third connecting part includes a relatively fixed adjusting cone seat and a toothed ring, the adjusting cone seat and the toothed ring forming a mounting cavity for mounting the collimating cone;

[0024] The outer circumferential surface of the collimating cone is provided with several protruding teeth of different specifications;

[0025] The inner circumferential surface of the tooth ring is provided with an opening corresponding to the protruding tooth; a boss is provided on the surface of the tooth ring near the mounting cavity, and when the protruding tooth passes through the opening, the boss can limit the rotation angle of the collimating cone relative to the tooth ring.

[0026] Preferably, the third connecting part further includes an upper cover that is fixedly connected to the third connecting part by threads, and the upper cover uses a washer to press the collimating cone into the third connecting part;

[0027] The washer has a stepped structure, and the stepped surface of the washer and the surface of the collimating cone form a receiving cavity for accommodating the ear seat on the outer periphery of the circular collimator.

[0028] Preferably, the accessory frame further includes an annular fixed seat and a plurality of adjusting bolts arranged in an annular array. The adjusting bolts are threadedly connected to the third connecting part along the radial direction of the fixed seat, and the ends of the adjusting bolts abut against the peripheral wall of the fixed seat.

[0029] Preferably, the second connecting part includes a positioning notch and a hook that are fixedly connected to the accessory frame. The hook is used to connect to the accessory base plate of the medical accelerator, and the positioning notch is used to engage with the support column of the medical accelerator.

[0030] The circular collimator mounting structure provided by this utility model has at least the following advantages compared with the prior art:

[0031] 1. The circular collimator is fixed by a collimating cone. The information component inside the collimating cone can store information about the collimating cone and / or the corresponding circular collimator. When the collimating cone is installed carrying the circular collimator, the information in the information component can be read by the device to be installed, and then the current collimating cone and / or circular collimator information can be transmitted to the device to be installed, avoiding problems such as the circular collimator colliding with the grating or replacing the wrong circular collimator.

[0032] 2. The circular collimator is installed via the accessory bracket. The internally integrated information recognition component can identify the information components inside the circular collimator and / or collimating cone, thereby obtaining information about the currently installed collimating cone and / or circular collimator, avoiding problems such as the circular collimator colliding with the grating or replacing the wrong circular collimator. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 A schematic diagram of the specific circular collimator mounting structure provided by this utility model;

[0035] Figure 2 A cross-sectional view of the specific circular collimator mounting structure provided by this utility model;

[0036] Figure 3 Provided by this utility model Figure 2 Enlarged view of point A in the middle;

[0037] Figure 4 Provided by this utility model Figure 2 Enlarged view of point B in the middle;

[0038] Figure 5 An assembly diagram of the collimating cone and circular collimator provided by this utility model;

[0039] Figure 6 This is a schematic diagram of the dental ring provided by this utility model.

[0040] In the picture:

[0041] 1. Circular collimator;

[0042] 2. Collimating cone; 21. External conical surface; 22. Groove; 23. Protruding tooth;

[0043] 3. Washers;

[0044] 4. Adjusting cone seat; 41. Inner cone surface; 42. Adjusting bolt;

[0045] 5. Information recognition component; 51. Base; 52. Ejector pin; 53. Elastic element; 54. Detection switch; 55. Circuit board; 56. Support column;

[0046] 6. Fixture;

[0047] 7. Top cover;

[0048] 8. Tooth ring; 81. Tooth beak; 82. Boss;

[0049] 9. Accessory rack; 91. Fixed handle; 92. Positioning notch; 93. Hook. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] The core of this utility model is to provide a circular collimator mounting structure. By integrating information components and information recognition components in the collimation cone and accessory frame respectively, the information of the circular collimator and / or collimation cone can be identified, thereby reducing the risk of collision between the grating and the collimator and the risk of incorrect replacement of the circular collimator.

[0052] Please refer to Figures 1-6 A circular collimator mounting structure for fixing the circular collimator 1 to a medical accelerator;

[0053] The circular collimator mounting structure includes:

[0054] The collimation cone 2 is provided with a first connecting part for fixing and connecting the circular collimator 1;

[0055] The accessory frame 9 is provided with a second connecting part for fixing and connecting the medical accelerator and a third connecting part for cooperating with the installation of the collimation cone 2;

[0056] The collimation cone 2 includes an information component for storing information corresponding to the collimation cone 2 and / or the circular collimator 1. The accessory frame 9 includes an information recognition component 5 for recognizing the information in the information component and sending it to the medical accelerator.

[0057] like Figure 2 and Figure 4As shown, the circular collimator 1 is fixedly connected to the medical accelerator via the collimation cone 2 and the accessory frame 9. The collimation cone 2 is used to fix the circular collimator 1, and the accessory frame 9 is used to fix it to the medical accelerator. The accessory frame 9 is provided with a third connecting part for fixing the collimation cone 2. Moreover, the collimation cone 2 is provided with an information component that can store information corresponding to the collimation cone 2 and / or the circular collimator 1. When the circular collimator 1 is installed with the collimation cone 2, the stored information in the information component can be obtained by the medical accelerator, thereby identifying the currently installed circular collimator 1 information, avoiding the replacement of misaligned models, and avoiding collision between the circular collimator 1 and the grating during use.

[0058] Meanwhile, the information recognition component 5 is directly integrated into the accessory frame 9, avoiding the need to modify the medical accelerator. When assembling the collimating cone 2 and the accessory frame 9, the information recognition component 5 can identify the information of the information component in the collimating cone 2 and transmit the information to the medical accelerator, so that the medical accelerator can obtain the information of the currently assembled circular collimator 1.

[0059] In some embodiments, the collimating cone 2 includes an outer conical surface 21, and the third connecting portion includes an inner conical surface 41, wherein the outer conical surface 21 and the inner conical surface 41 have equal tapers;

[0060] When the collimating cone 2 is installed in conjunction with the third connecting part, the outer cone surface 21 abuts against the inner cone surface 41.

[0061] like Figure 2 and Figure 4 As shown, the third connecting part includes an adjusting cone seat 4 with an inner hole. The collimating cone 2 is embedded in the inner hole of the adjusting cone seat 4. The inner hole wall of the adjusting cone seat 4 is an inner cone surface 41, while the outer peripheral wall of the collimating cone 2 is an outer cone surface 21. The inner cone surface 41 and the outer cone surface 21 are contacting surfaces with the same taper. This ensures that the collimating cone 2 and the adjusting cone seat 4 have the same axis during assembly, i.e., the axis of the collimating cone 2 overlaps with that of the third connecting part, thus ensuring installation accuracy.

[0062] In some embodiments, the third connecting portion includes an angle limiting component for limiting the relative rotation angle between the collimating cone 2 and the third connecting portion during installation.

[0063] By setting an angle limiting component, the collimating cone 2 and the third connecting part can obtain a relatively stable relative rotation angle during assembly, which ensures that the collimating cone 2 and the accessory frame 9 have the same relative rotation angle after each installation, thus ensuring the consistency of the assembly result.

[0064] In some embodiments, the information identification component 5 includes a plurality of contact switches, and the information component includes a plurality of information points, and the positions and / or numbers of information points are different in different information components;

[0065] When the collimating cone 2 is installed in conjunction with the third connecting part, the contact switch that is in contact with the information point and the contact switch that is not in contact with the information point will give different instructions.

[0066] like Figure 4 As shown, the information recognition component 5 includes several contact switches. When a contact switch is triggered, it provides a different instruction than when it is not triggered. Multiple contact switches can be used in combination to generate binary data information, which is used for information transmission between the information component and the information recognition component 5.

[0067] That is, different information points are set on different collimating cones 2. When the collimating cone 2 is assembled with the third connecting part, different information points can trigger different contact switches. Therefore, the information recognition component 5 can obtain different binary data information, and then obtain the information of the currently assembled collimating cone 2 and / or circular collimator 1.

[0068] In some embodiments, the information recognition component 5 further includes a base 51, which includes a mounting surface for abutting against the collimating cone 2;

[0069] The contact switch includes a pin 52 and a detection switch 54. The pin 52 is slidably mounted on the base 51. When the pin 52 is at the first stroke end, one end of it extends to the outside of the mounting surface. When the pin 52 is at the second stroke end, the pin 52 triggers the detection switch 54. The base 51 is provided with an elastic element 53 for driving the pin 52 to slide to the first stroke end.

[0070] The information point includes a groove 22 set on the surface of the collimating cone 2. When the collimating cone 2 abuts against the base 51, the collimating cone 2 can drive the ejector pin 52, which is not in the position corresponding to the groove 22, to slide to the second stroke end point.

[0071] like Figure 4 As shown, the contact switch of the information recognition component 5 is in the form of a pin 52. When the pin 52 is driven to move a preset stroke, the contact switch is triggered. The corresponding information point is provided with a groove 22. When the groove 22 corresponds to the pin 52, the contact switch corresponding to the pin 52 is not triggered, while the contact switch of the pin 52 that does not correspond to the groove 22 is triggered. Therefore, by setting different grooves 22 on the abutting surfaces of the collimating cone 2 and the base 51, the information recognition component 5 can obtain different information.

[0072] like Figure 2 and Figure 4 As shown, the base 51 is fixedly connected to the circuit board 55 by the support column 56. The detection switch 54 is fixedly installed on the circuit board 55. The ejector pin 52 is set one-to-one with the detection switch 54. When the ejector pin 52 is driven to move, the detection switch 54 below can be triggered, that is, the contact switch is triggered.

[0073] In some embodiments, the information component uses a storage chip to store information, and the information identification component 5 uses a near-field communication RFID chip to read information from the storage chip, thus achieving the same function.

[0074] In some embodiments, the groove 22 is an arc-shaped groove, and the center of the arc-shaped groove overlaps with the rotation axis of the collimating cone 2. When the collimating cone 2 rotates, the groove 22 can continuously accommodate the ejector pin 52 corresponding to its position.

[0075] like Figure 5 As shown, the groove 22 is set as an arc-shaped groove. When the collimating cone 2 rotates, the corresponding ejector pin 52 can always be contained in the groove 22 and not be triggered, thus ensuring the accuracy of the recognition result. At the same time, the length of the groove 22 should not be less than the maximum rotation of the collimating cone 2 relative to the third connecting part, so as to avoid unnecessary triggering of the ejector pin 52 due to excessive rotation of the collimating cone 2.

[0076] In some embodiments, the third connecting part includes a relatively fixed adjusting cone seat 4 and a toothed ring 8, the adjusting cone seat 4 and the toothed ring 8 forming a mounting cavity for mounting the collimating cone 2;

[0077] The outer circumferential surface of the collimating cone 2 is provided with several protruding teeth 23 of different specifications;

[0078] The inner circumferential surface of the tooth ring 8 is provided with a tooth opening 81 at the corresponding position of the protruding tooth 23; a boss 82 is provided on the surface of the tooth ring 8 near the mounting cavity. When the protruding tooth 23 passes through the tooth opening 81, the boss 82 can limit the rotation angle of the collimating cone 2 relative to the tooth ring 8.

[0079] like Figure 2 , Figure 4 and Figure 6 As shown, by setting a toothed ring 8 on the adjusting cone seat 4 and combining the arrangement of the teeth 81 inside the toothed ring 8, the collimating cone 2 must be assembled at an accurate relative angle during assembly. That is, after assembly, the collimating cone 2 and the adjusting cone seat 4 have a relatively stable relative rotation angle, that is, the collimating cone 2 and the third connecting part have a relatively stable relative rotation angle.

[0080] Meanwhile, a boss 82 is provided on the lower surface of the tooth ring 8 to limit the rotation angle of the collimating cone 2 after it passes through the tooth ring 8, so that the protruding tooth 23 of the collimating cone 2 interacts with the non-tooth part of the tooth ring 8, thus preventing the collimating cone 2 from detaching in the opposite direction.

[0081] In some embodiments, the third connecting part further includes an upper cover 7 that is fixedly connected to the third connecting part by threads, and the upper cover 7 uses a washer 3 to press the collimating cone 2 into the third connecting part;

[0082] The washer 3 has a stepped structure. The stepped surface of the washer 3 and the surface of the collimating cone 2 form a receiving cavity to accommodate the ear seat on the outer periphery of the circular collimator 1.

[0083] like Figure 2 and Figure 4 As shown, the upper cover 7 is fixedly connected to the third connecting part by threads, and the axial pressure is applied to the straight cone cylinder 2 by the washer 3 so that the straight cone cylinder 2 and the third connecting part are relatively abutted and fixed.

[0084] At the same time, such as Figure 4 As shown, the washer 3 adopts a stepped structure, and the stepped surface and the upper surface of the collimating cone 2 form a receiving cavity, which can fix the lug of the circular collimator 1 in the receiving cavity and play an axial limiting role for the circular collimator 1.

[0085] In some embodiments, the accessory frame 9 further includes an annular fixed base 6 and a plurality of adjusting bolts 42 arranged in an annular array. The adjusting bolts 42 are threadedly connected to the third connecting portion along the radial direction of the fixed base 6, and the ends of the adjusting bolts 42 abut against the peripheral wall of the fixed base 6.

[0086] like Figure 2 and Figure 3 As shown, the third connecting part includes an adjusting cone seat 4, an annular structure is provided inside the adjusting cone seat 4, and adjusting bolts 42 are arranged in an annular array inside the annular structure. The adjusting bolts 42 are connected to the annular structure by threads, and the axial direction of the adjusting bolts 42 is perpendicular to the axial direction of the annular structure.

[0087] During assembly, the annular structure is parallel to the axis of the fixed seat 6, and the end of the adjusting bolt 42 abuts against the peripheral wall of the fixed seat 6. By adjusting the screwing amount of the adjusting bolt 42 at different positions, the coaxiality of the fixed seat 6 and the annular structure can be adjusted, thereby adjusting the coaxiality of the circular collimator 1 and the accessory frame 9.

[0088] In some embodiments, the second connecting part includes a positioning notch 92 and a hook 93 that are fixedly connected to the accessory frame 9. The hook 93 is used to connect to the accessory base plate of the medical accelerator, and the positioning notch 92 is used to engage with the support column of the medical accelerator.

[0089] like Figure 1 As shown, the accessory frame 9 is provided with a positioning notch 92 and a hook 93, which are used to ensure the positioning accuracy and connection stability of the accessory frame 9 when it is assembled with the medical accelerator. At the same time, fixed handles 91 are provided on both sides of the accessory frame 9 for easy gripping by the user.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0091] The circular collimator mounting structure provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A circular collimator mounting structure for fixing a circular collimator (1) to a medical accelerator, characterized in that, include: The collimating cone (2) is provided with a first connecting part for fixing the circular collimator (1); The accessory frame (9) is provided with a second connecting part for fixing the medical accelerator and a third connecting part for cooperating with the installation of the collimating cone (2); The collimation cone (2) includes an information component for storing information corresponding to the collimation cone (2) and / or the circular collimator (1), and the accessory frame (9) includes an information identification component (5) for identifying the information of the information component and sending it to the medical accelerator.

2. The circular collimator mounting structure according to claim 1, characterized in that, The collimating cone (2) includes an outer cone surface (21), and the third connecting part includes an inner cone surface (41). The outer cone surface (21) and the inner cone surface (41) have the same taper. When the collimating cone (2) is installed in conjunction with the third connecting part, the outer cone surface (21) abuts against the inner cone surface (41).

3. The circular collimator mounting structure according to claim 1 or 2, characterized in that, The third connecting part includes an angle limiting component for limiting the relative rotation angle when the collimating cone (2) and the third connecting part are installed together.

4. The circular collimator mounting structure according to claim 1, characterized in that, The information identification component (5) includes several contact switches, and the information component includes several information points, and the positions and / or numbers of the information points of different information components are different; When the collimating cone (2) is installed in conjunction with the third connecting part, the contact switch that is in contact with the information point and the contact switch that is not in contact with the information point will give different instructions.

5. The circular collimator mounting structure according to claim 4, characterized in that, The information recognition component (5) also includes a base (51), which includes a mounting surface for abutting against the collimating cone (2); The contact switch includes a pin (52) and a detection switch (54). The pin (52) is slidably mounted to the base (51). When the pin (52) is at the first stroke end, one end of it extends to the outside of the mounting surface. When the pin (52) is at the second stroke end, the pin (52) triggers the detection switch (54). The base (51) is provided with an elastic element (53) for driving the pin (52) to slide to the first stroke end. The information point includes a groove (22) provided on the surface of the collimating cone (2). When the collimating cone (2) abuts against the base (51), the collimating cone (2) can drive the ejector pin (52) that does not correspond to the position of the groove (22) to slide to the second stroke end point.

6. The circular collimator mounting structure according to claim 5, characterized in that, The groove (22) is an arc-shaped groove, and the center of the arc-shaped groove overlaps with the rotation axis of the collimating cone (2). When the collimating cone (2) rotates, the groove (22) can continuously accommodate the ejector pin (52) corresponding to its position.

7. The circular collimator mounting structure according to claim 3, characterized in that, The third connecting part includes a relatively fixed adjusting cone seat (4) and a toothed ring (8), the adjusting cone seat (4) and the toothed ring (8) forming a mounting cavity for mounting the collimating cone (2); The outer circumferential surface of the collimating cone (2) is provided with several protruding teeth (23) of different specifications. The inner circumferential surface of the toothed ring (8) is provided with a tooth opening (81) at the corresponding position of the protruding tooth (23); a boss (82) is provided on the surface of the toothed ring (8) near the mounting cavity. When the protruding tooth (23) passes through the tooth opening (81), the boss (82) can limit the rotation angle of the collimating cone (2) relative to the toothed ring (8).

8. The circular collimator mounting structure according to claim 1, characterized in that, The third connecting part also includes an upper cover (7) that is fixedly connected to the third connecting part by threads, and the upper cover (7) uses a washer (3) to press the collimating cone (2) into the third connecting part; The washer (3) has a stepped structure. The stepped surface of the washer (3) and the surface of the collimating cone (2) form a receiving cavity to accommodate the ear seat on the outer periphery of the circular collimator (1).

9. The circular collimator mounting structure according to claim 1, characterized in that, The accessory frame (9) also includes an annular fixed seat (6) and a plurality of adjusting bolts (42) arranged in an annular array. The adjusting bolts (42) are threaded to the third connecting part along the radial direction of the fixed seat (6), and the ends of the adjusting bolts (42) abut against the peripheral wall of the fixed seat (6).

10. The circular collimator mounting structure according to claim 1, characterized in that, The second connecting part includes a positioning notch (92) and a hook (93) that are fixedly connected to the accessory frame (9). The hook (93) is used to connect to the accessory base plate of the medical accelerator, and the positioning notch (92) is used to engage with the support column of the medical accelerator.

Images