JPWO2006109777A1 - Chemical injection device - Google Patents

Abstract

Provided is a chemical solution injection device capable of realizing a simple structure to maintain an appropriate contrast level and minimize the injection amount of a contrast medium. The lower limit speed input by the lower limit input means 133 is stored in the lower limit storage means 134, and the start detection means 135 detects the start of deceleration. The operation control means 140 maintains the injection speed of the piston drive mechanism 117 at the reference speed until the start of deceleration is detected, and reduces it to the stored lower limit speed when the start of deceleration is detected. Therefore, the contrast agent injection speed can be set to the reference speed until the contrast level reaches an appropriate value, and can be decreased to the lower limit speed after the contrast level reaches the appropriate value.

Description

The present invention relates to a chemical injection device for injecting a chemical into a subject, and in particular, CT (Computed
Tomography) scanner, MRI (Magnetic Resonance Imaging) equipment, PET (Positron Emission)
The present invention relates to a chemical liquid injector that injects a contrast medium into a subject whose fluoroscopic image is captured by a fluoroscopic imaging apparatus such as a Tomography apparatus.

  Currently, there are CT scanners, MRI apparatuses, PET apparatuses, ultrasonic diagnostic apparatuses, CT angio apparatuses, MR angio apparatuses, and the like as fluoroscopic imaging apparatuses that capture a fluoroscopic image of a subject. When using the apparatus as described above, a chemical liquid such as a contrast medium or physiological saline may be injected into the subject, and a chemical liquid injection apparatus that automatically executes this injection has also been put into practical use.

  Such a chemical solution injection device has, for example, an injection execution unit including a drive motor and a slider mechanism, and a chemical solution syringe is detachably attached thereto. The drug solution syringe has a structure in which a piston member is slidably inserted into a cylinder member, and the cylinder member is filled with a contrast medium or physiological saline.

  When such a drug solution syringe is connected to the subject with an extension tube and attached to the injection execution means, the drug solution injection device individually holds the piston member and the cylinder member by the injection execution means and moves them relative to each other. A subject is injected with a contrast agent.

  In that case, when the operator decides the injection speed and injection volume of the contrast medium in consideration of various conditions, and inputs these values to the drug solution injection device, the drug solution injection device contrasts at the speed and volume corresponding to the input value. The agent is injected into the subject. Since the contrast level of the subject is changed by the injection of the contrast agent, a good fluoroscopic image is captured by the fluoroscopic imaging device.

  In addition, there is a product that can inject physiological saline together with a contrast agent into a subject, and in that case, the operator may inject the physiological saline in conjunction with the completion of the injection of the contrast agent if desired. Input to the chemical injection device along with the injection volume.

  Then, this chemical injection device automatically injects physiological saline after injecting a contrast medium into the subject corresponding to the input data. For this reason, the contrast agent can be boosted with physiological saline to reduce the consumption of the contrast agent, and the artifact can be reduced with the physiological saline.

In addition, the above-mentioned chemical | medical solution injection | pouring apparatus as mentioned above was invented and applied in the past by this applicant etc. (for example, refer patent document 1, 2). Furthermore, the present applicant has invented and filed an application for a chemical injection device that maintains the contrast level appropriately by changing the injection speed of the contrast agent with time in accordance with a variable pattern set in advance by data ( For example, see Patent Documents 3 and 4).
JP 2002-11096 A JP 2002-102343 A JP 2004-113475 A JP 2004-298549 A

  As described above, in the chemical solution injector that changes the injection speed of the contrast agent with time in accordance with the variable pattern, it is possible to appropriately maintain the contrast level and minimize the injection amount of the contrast medium. However, in order to realize this, the variable pattern needs to be appropriately set with data, but the contrast level is also affected by conditions such as the physique of the subject and the components of the contrast agent. For this reason, it is not easy to set data appropriately for a variable pattern, and it is difficult to achieve a desired contrast level with a uniform variable pattern.

  In addition, in the above-described chemical injection device, it is possible to freely change the injection speed of the contrast agent. However, for this purpose, variable pattern data input and data storage are required, and the variable pattern is supported. Since operation control of the injection rate is also required, the structure and operation are complicated.

  The present invention has been made in view of the above-described problems, and provides a chemical injection device that can achieve a simple structure to maintain an appropriate contrast level and minimize the amount of contrast medium injected. With the goal.

  The first chemical injection device of the present invention has injection execution means, lower limit input means, lower limit storage means, start detection means, and operation control means, and provides a liquid medicine to a subject whose fluoroscopic image is captured by the fluoroscopic imaging device. At least a contrast medium is injected. The injection execution means executes the injection of the contrast agent, and the lower limit input means inputs the lower limit speed of the injection. The lower limit storage means stores the input lower limit speed, and the start detection means detects the start of deceleration of the injection speed. The operation control means maintains the injection speed of the injection execution means at a predetermined reference speed until the start of deceleration is detected, and reduces to the stored lower limit speed when the start of deceleration is detected. The injection speed of the contrast medium is injected at the reference speed until it reaches the appropriate value, and after the contrast level reaches the appropriate value, the desired lower limit speed is lowered.

  The second chemical liquid injection device of the present invention has injection execution means, deceleration input means, deceleration storage means, start detection means, and operation control means. The deceleration input means has an injection deceleration rate. An input operation is performed, and the deceleration storage means stores the input operated deceleration. The motion control means maintains the injection speed of the injection execution means at a predetermined reference speed until the start of deceleration is detected, and decreases the stored deceleration when the start of deceleration is detected. The contrast medium injection speed is injected at the reference speed until it reaches the appropriate value, and after the contrast level reaches the appropriate value, it is reduced at the desired deceleration.

  The various means referred to in the present invention need only be formed so as to realize the function. For example, dedicated hardware that exhibits a predetermined function, a data processing apparatus provided with a predetermined function by a computer program It can be realized as a predetermined function implemented in the data processing apparatus by a computer program, a combination thereof, or the like.

  Further, the various constituent elements referred to in the present invention do not necessarily have to be individually independent, and a plurality of constituent elements are formed as one member, and one constituent element includes a plurality of members. It is also possible that a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.

  In the chemical injection device of the present invention, when the start of deceleration is detected, the contrast agent injection rate is decreased, for example, until the contrast level reaches an appropriate value, the contrast agent injection rate is set as a reference speed, and the contrast level is increased. Since the contrast medium injection rate can be reduced after the value reaches the appropriate value, it is possible to achieve a simple structure to maintain the contrast level appropriately and minimize the contrast medium injection amount. .

It is a schematic diagram which shows the logical structure of the chemical | medical solution injection device of the fluoroscopic imaging system of embodiment of this invention. It is a block diagram which shows the physical structure of a fluoroscopic imaging system. It is a perspective view which shows the external appearance of a fluoroscopic imaging system. It is a perspective view which shows the external appearance of a chemical injection device. It is a perspective view which shows the state which attaches a chemical | medical solution syringe to the injection execution head of a chemical | medical solution injection device. It is a typical front view which shows the state by which the schematic image of the body division and the condition screen of the blank paper state were displayed on the display screen of the chemical injection device. It is a typical front view which shows the state by which the body division was selected. It is a typical front view which shows the state by which the imaging site | part was selected and the condition image was displayed and output. It is a typical front view which shows the state by which the minimum speed was displayed and output. It is a typical front view showing the state where the actual speed graph of the reference speed is displayed and output. It is a typical front view which shows the state by which the deceleration start and completion | finish schedule were displayed and output. It is a typical front view which shows the state by which the actual speed graph of the injection speed to fall was displayed and output. It is a flowchart which shows the first half part of processing operation of a chemical injection device. It is a flowchart which shows a latter half part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Chemical injection device 101 Injection control unit 107 Controller unit which functions as start input means 110 Injection execution head 117 Piston drive mechanism which is injection execution means 120 Computer unit 131 Reference input means 132 Reference storage means 133 Lower limit input means 134 Lower limit storage means 135 Start detection means 140 Operation control means 141 Remaining amount detection means 142 Time calculation means 143 Deceleration calculation means 144 Speed reduction means 145 Injection end means 147 Total amount input means 148 Time detection means 149 Remaining quantity calculation means 200 Chemical liquid syringe 210 Cylinder member 220 Piston Member 300 CT scanner which is fluoroscopic imaging apparatus

[Configuration of the embodiment]
An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, a fluoroscopic imaging system 1000 according to an embodiment of the present invention includes a chemical liquid injector 100, a chemical syringe 200, and a CT scanner 300 that is a fluoroscopic imaging apparatus. As will be described later, a contrast medium or the like is injected as a drug solution into a subject (not shown).

  As shown in FIG. 3, the CT scanner 300 includes a fluoroscopic imaging unit 301 and an imaging control unit 302 that are imaging execution mechanisms. The fluoroscopic imaging unit 301 and the imaging control unit 302 are wired via a communication network 303. It is connected. The fluoroscopic imaging unit 301 captures a fluoroscopic image from the subject, and the imaging control unit 302 controls the operation of the fluoroscopic imaging unit 301.

  As shown in FIG. 5, the chemical syringe 200 includes a cylinder member 210 and a piston member 220, and the piston member 220 is slidably inserted into the cylinder member 210. The cylinder member 210 has a cylindrical hollow main body portion 211, and a conduit portion 212 is formed on the closed end surface of the main body portion 211.

  The end surface of the main body 211 of the cylinder member 210 is opened, and the piston member 220 is inserted into the main body 211 from this opening. A cylinder flange 213 is formed on the outer periphery of the cylinder member 210, and a piston flange 221 is formed on the outer periphery of the piston member 220.

  As shown in FIG. 4, the chemical injection device 100 according to the present embodiment includes an injection control unit 101 and an injection execution head 110 that is an injection device main body, which are formed separately, and the injection control unit 101 and the injection execution head 110. Is wired with a communication cable 102. The injection execution head 110 drives the attached chemical solution syringe 200 to inject the chemical solution into the subject, and the injection control unit 101 controls the operation of the injection execution head 110.

  For this reason, as shown in FIG. 2, the injection control unit 101 includes a computer unit 120, and is also wired to the imaging control unit 302 of the CT scanner 300 via a communication network 304. The injection control unit 101 includes a main operation panel 103, a touch panel 104 as a display panel, a speaker unit 105, and the like arranged on the front surface of the main body housing 106, and a separate controller unit 107 that functions as a start input unit is connected to a connector. 108 is wired.

  The injection execution head 110 is attached to the upper end of the caster stand 111 with a movable arm 112, and as shown in FIG. 4, a chemical syringe 200 is detachably attached to the upper surface of the head main body 113 which is the main body of the injection device. A semi-cylindrical groove-shaped recess 114 is formed.

  A cylinder holding mechanism 116 that detachably holds a cylinder flange 211 of the chemical syringe 200 is formed in front of the concave portion 114, and a piston that holds and slides the piston flange 221 behind the concave portion 114. A drive mechanism 117 is arranged as injection execution means.

  The cylinder holding mechanism 116 is formed as an irregularly shaped groove in the recess 114, and the cylinder flange 211 is detachably engaged. The piston drive mechanism 117 has a drive motor as a drive source, and slides the piston member 220 by a screw mechanism (not shown) or the like.

  The two concave portions 114 of the injection execution head 110 are individually equipped with a chemical syringe 200C filled with a contrast medium as a chemical liquid and a chemical syringe 200W filled with a physiological saline as a chemical liquid. The two concave portions 114 and the two piston drive mechanisms 117 form a contrast injection mechanism 117C for injecting a contrast medium into a subject and a saline injection mechanism 117W for injecting physiological saline.

  In the chemical injection device 100 of this embodiment, the computer unit 120 controls the operation of the piston drive mechanism 117 of the injection execution head 110 in response to manual operation of the main operation panel 103, the touch panel 104, and the controller unit 107 of the injection control unit 101. To do. However, a sub operation panel 118 is formed on the upper surface of the head main body 113 of the injection execution head 110, and the computer unit 120 controls the operation of the piston drive mechanism 117 of the injection execution head 110 even when the sub operation panel 118 is manually operated. .

In the chemical injection device 100 of this embodiment, the computer unit 120 is a so-called one-chip microcomputer, and includes a CPU (Central Processing Unit) 121, a ROM (Read Only Memory) 122, and a RAM (Random
Access Memory) 123, I / F (Interface) 124, and the like.

  In the computer unit 120, an appropriate computer program is mounted as firmware on an information storage medium such as the ROM 122, and the CPU 121 executes various processing operations corresponding to the computer program.

  As shown in FIG. 1, the chemical injection device 100 of the present embodiment is operated by the computer unit 120 corresponding to the computer program implemented as described above, so that the reference input unit 131, the reference storage unit 132, the lower limit An input unit 133, a lower limit storage unit 134, a start detection unit 135, and an operation control unit 140 are logically provided.

  The reference / lower limit input means 131 and 133 correspond to the function of the CPU 121 recognizing the input operation to the main / sub operation panels 103 and 118 corresponding to the above-described computer program. The speed is input, and the lower limit input means 133 is operated to input the lower limit speed.

  The reference / lower limit storage means 132 and 134 correspond to a storage area or the like constructed in the RAM 123 so that the CPU 121 recognizes data corresponding to the computer program. The reference storage means 132 stores the input reference speed, The lower limit storage unit 134 stores the lower limit speed that has been input.

  The start detection unit 135 corresponds to a function of the CPU 121 recognizing an input operation to the controller unit 107, and when the deceleration start is input to the controller unit 107 with a dedicated deceleration switch (not shown) or the like, The time is detected as a deceleration start.

  The operation control means 140 corresponds to the function of the CPU 121 controlling the operation of the piston drive mechanism 117 corresponding to the stored data in the RAM 123, and is stored until the start of deceleration of the injection speed of the piston drive mechanism 117 is detected. The reference speed is maintained, and when a deceleration start is detected, the speed is lowered to the stored lower limit speed.

  More specifically, the operation control unit 140 includes a remaining amount detection unit 141, a time calculation unit 142, a deceleration calculation unit 143, a speed reduction unit 144, and an injection end unit 145. The remaining amount detection unit 141 inputs a total amount. It comprises means 147, time detection means 148, and remaining amount calculation means 149.

  The total amount input means 147 corresponds to the function of the CPU 121 recognizing data input operation to the main / sub operation panels 103, 118, etc., and the total injection amount La at the start of the injection of contrast medium is input. The time detection unit 148 corresponds to a function of the CPU 121 integrating clock signals, and detects an elapsed time Ts from the start of contrast agent injection to the start of deceleration.

  The remaining amount calculating means 149 corresponds to a function of the CPU 121 executing a predetermined calculation process and the like. The remaining amount Lr of the contrast agent is calculated from the total injection amount La, the reference speed Vs, and the elapsed time Ts as “Lr = La−Vs × Ts”. ". The remaining amount detecting unit 141 includes the above-described units 147 to 149 to detect the contrast agent injection remaining amount Lr at the time when the start of deceleration is detected.

  The various calculation units 142 and 143 also correspond to functions for the CPU 121 to execute predetermined calculation processing, and the time calculation unit 142 sets the remaining injection time Tr necessary for the injection of the injection remaining amount Lr to the injection remaining amount Lr and the reference speed. Vs and the lower limit speed Vl are calculated as “Tr = 2Lr / (Vs + Vl)”, and the deceleration calculation means 143 sets the deceleration Ar for reducing the reference speed Vs to the lower limit speed Vl as “Ar = (Vs + Vl) (Vs−Vl). ) / 2Lr ″.

  The speed reduction means 144 decreases the injection speed from the reference speed Vs to the lower limit speed Vl by the deceleration Ar after the start of deceleration is detected, and the injection end means 145 passes the remaining injection time Tr after the start of deceleration is detected. Then, the injection operation of the piston drive mechanism 117 is terminated.

  The various means of the chemical solution injection device 100 as described above are realized by using hardware such as the touch panel 104 as necessary. The main unit is hardware corresponding to the computer program stored in the information storage medium such as the ROM 122. This is realized by the function of the CPU 121 as hardware.

  Such a computer program stores, for example, the total injection amount La, the reference speed Vs, and the lower limit speed Vl that are input and operated on the main / sub operation panels 103 and 118 in the RAM 123 and the like, and starts deceleration by the controller unit 107 and the like. Detecting the input operation of the contrast agent, detecting the elapsed time Ts from the start of the contrast agent injection to the start of the deceleration, detecting the remaining injection amount Lr of the contrast agent from the total injection amount La, the reference speed Vs, and the elapsed time Ts. “Lr = La−Vs × Ts” is calculated, and the remaining injection time Tr necessary for the injection of the injection remaining amount Lr is determined from the injection remaining amount Lr, the reference speed Vs, and the lower limit speed Vl as “Tr = 2Lr / (Vs + Vl)”. The deceleration Ar that lowers the reference speed Vs to the lower limit speed Vl is calculated as “Ar = (Vs + Vl) (Vs−Vl) / 2Lr”. That is, when the deceleration start is detected, the injection speed is reduced by the deceleration Ar from the reference speed Vs to the lower limit speed V1, and when the remaining injection time Tr has elapsed since the start of the deceleration is detected, the injection operation of the piston drive mechanism 117 is performed. It is stored in an information storage medium such as the RAM 123 as software for causing the CPU 121 to execute processing operations such as termination.

[Operation of the embodiment]
In the configuration as described above, when using the chemical injection device 100 of this embodiment, as shown in FIG. 3, an operator (not shown) places the chemical injection device 100 in the vicinity of the imaging unit 301 of the CT scanner 300. Then, as shown in FIG. 5, for example, a medical solution syringe 200 </ b> C, W of contrast medium and physiological saline is connected to a subject (not shown) located in the imaging unit 301 with a bifurcated extension tube 230. And the cylinder member 210 of these chemical | medical solution syringes 200 is hold | maintained at the recessed part 114 of the injection | pouring execution head 110, and the piston member 220 is made to hold | grip the piston drive mechanism 117. FIG.

  Next, when the operator activates the liquid injector 100 by an input operation on the main operation panel 103 or the like, as shown in FIGS. 6 and 13, a schematic image of a plurality of body sections is formed in a human body shape on the upper part of the touch panel 104. Corresponding display output. At the same time, on the lower left side, a rectangular condition screen is displayed with the injection rate of the chemical solution on the vertical axis and the injection time on the horizontal axis, and on the lower right side, the input lower surface of the lower limit speed is displayed and output (step). S1).

  Therefore, when the operator presses one of the schematic images of the plurality of body segments displayed and output on the touch panel 104 with his / her finger (step S2), only the schematic image of the selected body segment is clear as shown in FIG. As the other schematic image is darkened, the schematic image of the scanner mechanism is displayed and output above the schematic image of the selected body section.

  At the same time, a schematic image of a plurality of imaging parts related to the selected body segment is read out and displayed at the bottom (steps S3 and S4), and one of them is input by a finger or the like. Then (step S5), as shown in FIG. 8, only the selected one schematic image is brightened and the other schematic images are darkened.

  When the imaging region is selected as described above, in the chemical injection device 100 of this embodiment, the reference speed corresponding to the imaging region is read from the RAM 123 and set as the injection condition (step S6). When the total injection amount of the contrast syringe 200C is input on the main / sub operation panels 103, 118, etc. (step S7), the total injection amount is also set as an injection condition (step S8).

  When the reference speed and the total injection amount are set as described above, the total injection amount is divided by the reference speed to calculate the injection time (step S9). Then, an injection graph in which the reference speed and the injection volume are given as text data with a width corresponding to the injection time is generated, and the injection graph is in a vertical position corresponding to the reference speed as shown in FIG. Displayed and output on the condition screen (step S10).

  At this time, since the reference speed is also displayed on the lower limit speed input screen, if the operator wants to reduce the reference speed to the lower limit speed during the injection, the operator will set the lower limit speed on the input screen. The speed is input (step S11). Then, the lower limit speed is stored (step S12), and as shown in FIG. 9, it is displayed and output as text data on the input screen and also displayed and output as a horizontal line on the condition screen (step S13).

  In the state as described above (steps S10 and S13), when an injection start is input (step S14), the chemical injection device 100 that detects this performs the chemical injection at a reference speed set as data. (Step S15). At this time, the elapsed time is measured in real time (step S16), and the actual injection speed is also detected (step S17), so that the actual speed graph is displayed and output on the condition screen in real time as shown in FIG. (Step S18).

  When the contrast medium is injected into the subject at the reference speed as described above (step S15), the CT scanner 300 captures a fluoroscopic image from the subject, and the operator confirms the fluoroscopic image in real time. It will be. At this time, the contrast degree of the fluoroscopic image is sequentially increased by the injection of the contrast agent, so that it is initially lower than the appropriate value, reaches the appropriate value in the middle, and thereafter exceeds the appropriate value.

  In view of this, in the fluoroscopic imaging system 1000 of the present embodiment, the operator confirms the contrast level of the fluoroscopic image captured by the CT scanner 300 in real time, and when the contrast level reaches an appropriate value, the controller unit is added to the liquid injector 100. The deceleration start is input with 107 or the like (step S23).

  Then, the elapsed time Ts from the start of contrast agent injection until the start of deceleration is detected (step S26), and the contrast agent injection remaining amount Lr is calculated from the total injection amount La, the reference speed Vs, and the elapsed time Ts as “Lr = It is calculated as La−Vs × Ts ″ (step S27).

  Further, the remaining injection time Tr required for the injection of the injection remaining amount Lr is calculated as “Tr = 2Lr / (Vs + Vl)” from the injection remaining amount Lr, the reference speed Vs, and the lower limit speed Vl (step S28), and the reference speed Vs is calculated. The deceleration Ar to be lowered to the lower limit speed Vl is calculated as “Ar = (Vs + Vl) (Vs−Vl) / 2Lr” (step S29). Then, as shown in FIG. 10, the time point at which the injection start is input on the condition screen is displayed and output on the actual speed graph, and the scheduled end point of the injection end is displayed and output on the vertical line perpendicular to the horizontal line of the lower limit speed. (Step S30).

  Then, the contrast agent injection speed is reduced by the deceleration Ar from the reference speed Vs to the lower limit speed Vl (step S31). As shown in FIG. 12, this reduced injection speed is also displayed on the condition screen in real time as an actual speed graph. The display is output (step S32). When the remaining injection time Tr elapses after the start of deceleration is detected (step S35), the injection operation of the piston drive mechanism 117 is completed (step S37), so that the contrast agent is injected without excess or deficiency. .

  In the liquid injector 100 of this embodiment, even if the deceleration start is input during the injection of the contrast agent (step S23), if the lower limit speed is not stored (step S24), “the lower limit speed is set. A guidance message such as “Cannot execute deceleration injection because it is not present” is displayed on the touch panel 104 (step S25), and the injection operation at the reference speed is continued (step S15).

  Moreover, in the chemical injection device 100 of this embodiment, when deceleration injection is executed (step S31), even before the remaining injection time Tr elapses (step S35), for example, injection is performed with the operation stroke of the piston drive mechanism 117, etc. When completion is detected, the injection operation is terminated (steps S36 and S37).

  Similarly, when the deceleration start is not input during the injection of the contrast agent (step S23), the injection operation is terminated when the completion of injection is detected by the operation stroke of the piston drive mechanism 117 (step S20) (step S20). Step S37). Further, when the injection operation at the reference speed or the deceleration injection is performed (steps S15 and S31), for example, even if an injection stop is input (steps S19 and S34), the injection operation is ended (step S37). ).

  When an injection operation at a reference speed or a deceleration injection is being performed (steps S15 and S31), for example, when an abnormality is detected by a pressure sensor (not shown) or the like (steps S21 and S33), an “abnormality occurrence” is detected. A guidance message such as “Please confirm” is displayed and output on the touch panel 104 and is also output by the speaker unit 105 (step S22), and the injection operation is forcibly stopped (step S37).

[Effect of the embodiment]
In the chemical injection device 100 of the present embodiment, the injection speed of the piston drive mechanism 117 is maintained at the reference speed until an input operation is performed to start deceleration, and is decreased to a lower limit speed when an input operation is performed to start deceleration.

  Therefore, the contrast medium injection speed can be used as a reference speed until the contrast level reaches an appropriate value, and the contrast medium injection speed can be reduced after the contrast level reaches the appropriate value. It can be maintained properly to minimize the amount of contrast medium injected. In addition, for this reason, there is no need to change the injection rate with a complicated variable pattern, so that it is possible to realize an appropriate contrast level with a simple structure.

  Further, the contrast level by the contrast agent also changes depending on the body weight and physique of the subject, but in the chemical injection device 100 of this embodiment, when an operator who confirms the contrast level in real time is input to start deceleration, Correspondingly, since the reduction of the injection rate is started, the injection rate can be reduced when the contrast level reaches an appropriate value.

  In addition, although an appropriate reference speed varies depending on an imaging region or the like, the chemical injection device 100 according to the present embodiment can input and operate a reference speed corresponding to the imaging region. In particular, if an imaging part displayed and output as a schematic image on the touch panel 104 is selected by manual operation, the reference speed is automatically set as data, so that an appropriate reference speed can be set intuitively.

  Furthermore, in the chemical injection device 100 of the present embodiment, a desired lower limit speed can also be input, and the lower limit speed and the reference speed are displayed and output in real time on the same screen as text data and graphs. It is possible to intuitively set the appropriate lower limit speed correspondingly.

  Moreover, in the chemical injection device 100 of the present embodiment, when the deceleration start is input, the contrast agent remaining amount is calculated from the total injection amount, the reference speed, and the elapsed time, so that the operator inputs the remaining amount. There is no need to operate, and there is no need to actually measure the remaining amount of injection by weight. Furthermore, the deceleration is calculated from the remaining injection volume, the reference speed, and the lower limit speed, and the injection speed is sequentially reduced from the reference speed to the lower limit speed by that deceleration, so the injection speed is automatically reduced at the appropriate deceleration. The

  Moreover, the remaining injection time is calculated from the remaining injection amount, the reference speed, and the lower limit speed, and when the remaining injection time elapses, the injection operation is terminated. The total amount can be injected without excess or deficiency, and the injection can be automatically terminated at an appropriate timing. Furthermore, since the scheduled time of completion of injection is displayed and output in real time, the operator can intuitively confirm the scheduled time of completion of injection.

[Modification of Embodiment]
The present invention is not limited to the above embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, in the above embodiment, the liquid injector 100 having the contrast / saline injection mechanism 117C, W is exemplified to inject the contrast medium and physiological saline, but only the contrast medium is injected by the single piston drive mechanism 117. A chemical injection device (not shown) can also be implemented.

  Further, in the above embodiment, when the deceleration start is input, the deceleration is calculated from the reference speed and the lower limit speed, and the injection amount of the contrast agent is injected without excess or deficiency. Then, the injection rate can be decreased from the reference rate to the lower limit rate with a predetermined deceleration.

  In this case, the contrast agent may be terminated before the injection rate is reduced to the lower limit rate, or the contrast agent may not be terminated even if the injection rate is reduced to the lower limit rate, but the deceleration may be constant. Therefore, it is possible to prevent the injection rate from being varied at a deceleration that the operator does not expect. Further, in the above embodiment, the injection operation is terminated when the calculated remaining injection time elapses. However, for example, the injection operation can be terminated when the reference speed decreases to the lower limit speed.

  In the above embodiment, the reference speed is input to the chemical injection device 100 by the selection operation of the imaging region. However, a predetermined reference speed may be fixedly set in the chemical injection device. It is also possible to input a desired reference speed regardless of the imaging region.

  Furthermore, in the said form, memorize | stored the minimum speed | velocity | rate with which the chemical | medical solution injection device 100 is input-operated, and illustrated reducing the injection | pouring speed from the reference | standard speed to the memorize | stored minimum speed. However, it is also possible to store a deceleration at which the chemical liquid injector is input and to lower the injection speed from the reference speed by the stored deceleration (not shown).

  In this case, the final lower limit speed cannot be specified, but a desired deceleration can be specified. In the chemical injection device in which the deceleration is input as described above, the lower limit speed Vl at which the reference speed Vs is decreased by the deceleration Ar can be calculated as “Vl = √ (Vs2-2Lr × Ar)”. It is.

  In the above embodiment, the chemical injection device 100 illustrated that the start of deceleration is detected by an input operation. For example, an elapsed time from the start of contrast agent injection to the start of deceleration is input to the chemical injection device, and the elapsed time It is also possible to detect the start of deceleration when elapses.

  Further, in the above embodiment, the operator confirming the contrast level with the CT scanner 300 inputs the start of deceleration to the chemical injection device 100. For example, the contrast level of the fluoroscopic image that sequentially rises due to the injection of the contrast agent is shown. It is also possible for the chemical injection device to receive from the CT scanner 300 in real time, and the chemical injection device to display and output the received contrast level in real time. In this case, the operator can input the start of deceleration by confirming the contrast level with the chemical injection device, and can input the start of deceleration more reliably at an appropriate timing.

  In addition, the chemical injection device receives from the CT scanner 300 in real time the contrast level of the fluoroscopic image that sequentially rises due to the injection of the contrast agent, and detects the start of deceleration when the received contrast level reaches a predetermined reference value. Is possible. In this case, the deceleration start can be automatically executed at an appropriate timing without requiring the operator's input operation. Further, with such a chemical solution injection device, a reference value input by the operator is stored, and when the contrast received in real time from the CT scanner 300 reaches the stored reference value, the start of deceleration is detected. Is also possible.

  In the above embodiment, the total injection amount at the start of contrast agent injection is input by the operator. For example, a barcode, a two-dimensional code, or an RFID (Radio Frequency Identification) chip is provided on the chemical syringe 200. The total injection amount is recorded as a data, and the total injection amount can be read by the chemical injection device. In this case, the total injection amount can be input easily and reliably without requiring an operator input operation.

  Further, in the above embodiment, the CT scanner 300 is used as the fluoroscopic imaging apparatus, and the chemical injection device 100 injects the CT contrast agent. For example, an MRI apparatus or a PET apparatus is used as the fluoroscopic imaging apparatus, It is also possible to inject a contrast medium therefor by a chemical liquid injector.

  In the above embodiment, the CPU 121 is operated corresponding to the computer program stored in the RAM 123 and the like, and various means are logically realized as various functions of the chemical liquid injector 100. However, each of these various means can be formed as unique hardware, and a part can be stored in the RAM 123 or the like as software and a part can be formed as hardware.

Claims (26)

A chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by a fluoroscopic imaging device,
Injection execution means for executing injection of the contrast agent;
A lower limit input means for operating the lower limit speed of the injection;
Lower limit storage means for storing the input lower limit speed;
Start detection means for detecting the start of deceleration of the injection speed;
An operation control means for maintaining the injection speed of the injection execution means at a predetermined reference speed until the start of deceleration is detected and reducing the stored lower limit speed when the start of deceleration is detected;
A chemical injection device.   2. The chemical solution injection device according to claim 1, wherein the operation control unit reduces the injection speed of the injection execution unit to the lower limit speed by a predetermined deceleration when the start of deceleration is detected. The operation control means includes
A remaining amount detecting means for detecting an injection remaining amount Lr of the contrast agent at the time when the start of deceleration is detected;
Deceleration calculation means for calculating a deceleration Ar for reducing the reference speed Vs to the lower limit speed Vl as “Ar = (Vs + Vl) (Vs−Vl) / 2Lr”;
A speed reducing means for reducing the injection speed from the reference speed Vs to the lower limit speed Vl by the deceleration Ar after the start of deceleration is detected;
The chemical injection device according to claim 1, comprising: A chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by a fluoroscopic imaging device,
Injection execution means for executing injection of the contrast agent;
A deceleration input means for inputting the deceleration of the injection;
Deceleration storage means for storing the input-operated deceleration;
Start detection means for detecting the start of deceleration of the injection speed;
Operation control means for maintaining the injection speed of the injection execution means at a predetermined reference speed until the start of deceleration is detected and reducing the stored deceleration when the start of deceleration is detected. A chemical injection device.   5. The chemical injection device according to claim 4, wherein the operation control means reduces the injection speed of the injection execution means to a predetermined lower limit speed by the deceleration when the deceleration start is detected. The operation control means includes
A remaining amount detecting means for detecting an injection remaining amount Lr of the contrast agent at the time when the start of deceleration is detected;
A lower limit calculating means for calculating a lower limit speed Vl at which the reference speed Vs is decreased by the deceleration Ar as “Vl = √ (Vs2-2Lr × Ar)”;
Speed reducing means for reducing the injection speed from the reference speed Vs to the lower limit speed Vl by the deceleration Ar after the start of deceleration is detected;
The chemical | medical solution injection device of Claim 4 which has these. The operation control means includes
Time calculating means for calculating the remaining injection time Tr required for injection of the injection remaining amount Lr from the reference speed Vs and the lower limit speed Vl as “Tr = 2Lr / (Vs + Vl)”;
An injection end means for ending the injection operation of the injection execution means when the remaining injection time Tr has elapsed since the start of deceleration was detected;
The chemical injection device according to claim 3 or 6, wherein the chemical injection device is also provided.   The said operation control means also has an injection | pouring completion | finish means which complete | finishes the injection | pouring operation | movement of the said injection | pouring execution means, if the said reference speed falls to the said minimum speed, The any one of Claim 1 thru | or 3, 5 and 6 Chemical injection device. The remaining amount detecting means is
A total amount input means for inputting the total injection amount La at the start of injection of the contrast agent;
Time detection means for detecting an elapsed time Ts from the start of injection of the contrast agent until the start of deceleration is detected;
A remaining amount calculating means for calculating the injection residual amount Lr of the contrast medium as “Lr = La−Vs × Ts” from the total injection amount La, the reference speed Vs, and the elapsed time Ts;
The chemical injection device according to any one of claims 3, 6, and 7. Reference input means for inputting the reference speed;
Reference storage means for storing the input reference speed;
Also has
The chemical solution injection device according to any one of claims 1 to 9, wherein the operation control means maintains the injection speed of the injection execution means at the stored reference speed until the start of deceleration is detected. It also has time input means in which an elapsed time from the start of injection of the contrast agent to the start of deceleration is input,
The chemical solution injection device according to any one of claims 1 to 10, wherein the start detection unit detects the deceleration start when the elapsed time has elapsed from the start of injection. It also has start input means for inputting the deceleration start,
The chemical solution injection device according to any one of claims 1 to 10, wherein the start detection means detects the start of deceleration by the input operation. Contrast level receiving means for receiving in real time from the fluoroscopic imaging device the contrast level of the fluoroscopic image that sequentially rises due to the injection of the contrast agent;
Contrast level display means for displaying and outputting the received contrast level in real time;
The chemical injection device according to claim 12, which is also provided. Contrast level receiving means for receiving in real time from the fluoroscopic imaging device the contrast level of the fluoroscopic image that sequentially rises due to the injection of the contrast agent;
The medical solution injection device according to any one of claims 1 to 10, wherein the start detection means detects the deceleration start when the received contrast level reaches a predetermined reference value. Contrast level input means for inputting the contrast level reference value;
Contrast level storage means for storing the reference value that has been input,
Also has
The chemical injection device according to claim 14, wherein the start detection means detects the deceleration start when the received contrast level reaches the reference value stored. A fluoroscopic imaging system comprising: a chemical liquid injector that injects at least a contrast medium as a chemical into a subject; and a fluoroscopic imaging apparatus that captures a fluoroscopic image from the subject into which the contrast medium is injected,
The chemical injection device according to any one of claims 13 to 15,
The fluoroscopic imaging device that transmits the contrast level in real time to the drug solution injector;
A fluoroscopic imaging system. An operation control method for a chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by the fluoroscopic imaging device,
Accept input operation of the lower limit speed of the injection,
Memorize the input lower limit speed,
Detects the start of deceleration of the injection speed,
An operation control method for maintaining the injection speed of the contrast medium at a predetermined reference speed until the start of deceleration is detected and reducing the stored lower limit speed when the start of deceleration is detected. Detecting the remaining injection amount Lr of the contrast agent at the time when the deceleration start is detected,
A deceleration Ar for reducing the reference speed Vs to the lower limit speed Vl is calculated as “Ar = (Vs + Vl) (Vs−Vl) / 2Lr”,
The operation control method according to claim 17, wherein the injection speed is decreased by the deceleration Ar from the reference speed Vs to the lower limit speed Vl after the start of deceleration is detected. An operation control method for a chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by the fluoroscopic imaging device,
Accepting an input operation of the deceleration of the injection,
Memorize the input operated deceleration,
Detects the start of deceleration of the injection speed,
An operation control method for maintaining the injection speed of the injection execution means at a predetermined reference speed until the start of deceleration is detected, and decreasing the stored deceleration when the start of deceleration is detected. Detecting the remaining injection amount Lr of the contrast agent at the time when the deceleration start is detected,
The lower limit speed Vl at which the reference speed Vs is decreased by the deceleration Ar is calculated as “Vl = √ (Vs2-2Lr × Ar)”,
The operation control method according to claim 19, wherein the injection speed is decreased from the reference speed Vs to the lower limit speed Vl by the deceleration Ar after the start of deceleration is detected. The remaining injection time Tr required for injection of the injection remaining amount Lr is calculated as “Tr = 2Lr / (Vs + Vl)” from the reference speed Vs and the lower limit speed Vl.
The operation control method according to claim 18 or 20, wherein the injection operation is terminated when the remaining injection time Tr elapses after the start of deceleration is detected. A computer program for a chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by the fluoroscopic imaging device,
Receiving an input operation of a lower limit speed of the injection;
Storing the input lower limit speed,
Detecting the start of deceleration of the injection rate,
Maintaining the injection speed of the contrast medium at a predetermined reference speed until the start of deceleration is detected, and reducing the stored lower limit speed when the start of deceleration is detected;
Is a computer program for causing the medicinal solution injection device to execute. Detecting the remaining injection amount Lr of the contrast agent at the time when the deceleration start is detected;
A deceleration Ar for reducing the reference speed Vs to the lower limit speed Vl is calculated as “Ar = (Vs + Vl) (Vs−Vl) / 2Lr”;
Lowering the injection speed from the reference speed Vs to the lower limit speed Vl with the deceleration Ar after the start of deceleration is detected;
23. The computer program according to claim 22 for causing the medicinal solution injection device to execute. A computer program for a chemical injection device that injects at least a contrast medium as a chemical to a subject whose fluoroscopic image is captured by the fluoroscopic imaging device,
Receiving an input operation of the deceleration of the injection;
Storing the input-operated deceleration,
Detecting the start of deceleration of the injection rate,
Maintaining the injection speed of the contrast agent at a predetermined reference speed until the start of deceleration is detected, and decreasing the stored deceleration when the start of deceleration is detected;
Is a computer program for causing the medicinal solution injection device to execute. Detecting the remaining injection amount Lr of the contrast agent at the time when the deceleration start is detected;
Calculating a lower limit speed Vl at which the reference speed Vs is decreased by the deceleration Ar as “Vl = √ (Vs2-2Lr × Ar)”;
Lowering the injection speed from the reference speed Vs to the lower limit speed Vl at the deceleration Ar after the start of deceleration is detected;
25. The computer program according to claim 24, for causing the medicinal solution injection device to execute. Calculating a remaining injection time Tr necessary for injection of the injection remaining amount Lr as “Tr = 2Lr / (Vs + Vl)” from the reference speed Vs and the lower limit speed Vl;
Terminating the injection operation when the remaining injection time Tr has elapsed since the start of deceleration was detected;
26. A computer program according to claim 23 or 25 for causing said medicinal solution injection device to execute.

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