JP2011194123A - Medical diagnostic imaging system and contrast imaging liquid feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagnostic imaging system and a contrast imaging liquid feeder, capable of performing the contrast imaging CT without moving a dead body out of a CT gantry, and capable of confirming a condition of an internal organ related to causes of death.SOLUTION: The medical diagnostic imaging system includes: a liquid feeding pump for feeding a liquid into the dead body; a contrast agent administration means for administering a contrast agent into the liquid; an image acquisition means for collecting images of the dead body with the contrast agent administered by the contrast agent administration means; and a control means for controlling the timing for collecting images by the image acquisition means, and at least either the timing for feeding the liquid by the liquid feeding pump or the timing for administering the contrast agent by the contrast agent administration means.

Description

  The present invention relates to a medical image diagnostic system and a contrast-feeding apparatus capable of performing image diagnosis at the time of death in conjunction with an image diagnostic apparatus by injecting a contrast medium into a corpse.

  Hemorrhagic lesions such as cerebral hemorrhage and aortic aneurysm rupture can be diagnosed without contrast media in determining the cause of death by imaging at death, but concomitant use of contrast media such as coronary thrombosis causing myocardial infarction causing sudden death Some lesions cannot be diagnosed without it. Therefore, it is considered that after a doctor injects a contrast medium by cardiac massage, the body is moved into a CT gantry and contrast CT (Computed Tomography) imaging is performed.

  Such postmortem contrast CT imaging is expected to increase in the future due to the strengthening of the cause-of-death investigation system. In addition, bereaved families often do not like dissection, and it is preferable that the cause of death can be elucidated without damaging as much as possible.

  Moreover, there exists a thing of patent document 1 as a technique which administers a contrast agent with respect to a patient, and performs CT imaging | photography.

JP 2008-178466 A

  After death, there is no blood circulation due to spontaneous heartbeat, so doctors can inject contrast media into the body by performing heart massage. It is difficult to judge whether it was done.

  Devices that can automatically circulate blood include an automatic heart massage device. If these are used, it seems possible to automatically inject contrast media into the corpse. However, if CT imaging is performed in a CT gantry with this device attached, artifacts derived from the materials constituting the automatic cardiac massage device will be observed, so it may not be used for diagnostic imaging at the time of death. .

  The present invention has been made to solve the above-described problems, and enables contrast CT imaging without revealing a corpse from the CT gantry, and reveals lesions and damage of organs related to the cause of death. An object of the present invention is to provide an image diagnostic system and a contrast-feeding device.

  According to claim 1 of the present invention, a liquid feed pump for feeding a liquid into the body, a contrast medium administration means for administering a contrast medium to the liquid, and the contrast medium administered by the contrast medium administration means Control for controlling at least one of an image acquisition means for collecting an image of a corpse, an image acquisition timing of the image acquisition means of the contrast medium administration means, a liquid feed timing of the liquid feed pump, or an administration timing by the contrast medium administration means And a medical image diagnostic system comprising: means.

  According to a seventh aspect of the present invention, there is provided a liquid circulating means comprising a liquid feed pump for forcibly circulating a liquid in the body, a contrast medium administration means for administering a contrast medium to the circulating liquid, and the body A control means for controlling the liquid circulation means in accordance with a control parameter and a control sequence for obtaining an image of the image, and a network connected to the control means through a network, and taking an image of a desired part of the body in accordance with a control command from the control means And a medical image diagnostic system characterized by comprising:

According to claim 8 of the present invention, a liquid feed pump for feeding a liquid into the body,
A contrast-feeding device comprising: a contrast-medium administration unit that administers a contrast agent to the liquid; and a control unit that controls a liquid-feeding timing of the liquid-feeding pump and a timing of administration by the contrast-medium administration unit. provide.

  According to the diagnostic imaging system and the contrast-feeding apparatus of the present invention, there is an effect that contrast CT imaging can be performed without moving the body from within the CT gantry.

1 is a diagram illustrating a basic configuration example of an image diagnostic system according to an embodiment of the present invention. It is an example of a diagnostic flowchart of an image diagnostic system concerning an embodiment of the present invention. 1 is a configuration diagram of an image diagnostic system according to a first embodiment of the present invention. It is a block diagram in the case of diagnosing the thin part of the blood vessel of the diagnostic imaging system which concerns on the 2nd Embodiment of this invention. It is an example of the death diagnosis flowchart in dynamic CT of the diagnostic imaging system which concerns on the 3rd Embodiment of this invention. It is a figure which shows the standard of the imaging delay time in the dynamic CT imaging of the diagnostic imaging system which concerns on the 3rd Embodiment of this invention. (A) is an average time in a normal living body, and (b) is a time considering individual differences. It is a figure which shows the liver which concerns on the 3rd Embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a basic configuration diagram of an image diagnostic system according to an embodiment of the present invention. This diagnostic imaging system includes catheters 101a and 101b connected to a blood vessel 100 at a site where a cause of death is expected, a contrast medium administration device 102, and an extracorporeal circulation device 104 to which a heating device 103 is connected. The liquid circulation means, the control device 105 for controlling these devices, and the plan database 106 in which the control sequence and control parameters for controlling the devices constituting the liquid circulation means are stored.

  The contrast medium administration device 102 and the extracorporeal circulation device 104 to which the heating device 103 is connected may be integrated into a single liquid feeding device for contrast.

  Control parameters stored in the plan database 106 can be input from an input device 107 connected to the control device 105. The control parameter can also be read from another device connected to the network, which will be described later, or a storage medium.

  Further, the control device 105 includes a CT device 108 for photographing the body and identifying the cause of death, and a computer image diagnosis support device (CAD for estimating the cause of death from a large number of CT images photographed by the CT device 108. : Computer-Aided Diagnosis System (hereinafter CAD) 109 is connected via the network 110. When the body 111 to which the catheters 101a and 101b are attached is sent into the CT gantry 112, the control device 105 controls the liquid circulation means according to the doctor's instructions or the control parameters of the plan database 106 for the image diagnosis at death. . Then, when the contrast agent is injected to an appropriate position of the diagnostic site, an instruction command is issued to the CT apparatus 108 and a CT image is taken.

  FIG. 2 is a basic diagnosis flowchart of the diagnostic imaging system according to the embodiment of the present invention. A schematic flow of the image diagnosis will be described with reference to this flowchart.

  First, in step S200, at least two catheters 101a and 101b are connected using a percutaneous method such as a puncture needle to a blood vessel 100 at a site where it is necessary to confirm the presence or absence of an abnormality leading to a presumed cause of death, Further, an extracorporeal circulation device 104, a heating device 103, and a contrast medium administration device 102 are attached so that blood (liquid) can be circulated with respect to the body 111. Next, in step S <b> 201, the body 111 is sent into the CT gantry 112.

  In step S202, blood is circulated. When there is not enough blood in the corpse 111, body fluid may be replenished with physiological saline or the like. At this time, the heating device 103 is used to heat the circulating blood until the temperature of the circulating blood reaches the temperature of the control parameter set in the plan database 106 (for example, about 37 degrees).

  The contrast medium to be administered is also adjusted with a contrast medium heating device (not shown) so that the temperature of the contrast medium is about 37 ° C. However, when the temperature of the corpse blood and the contrast medium are unified at room temperature, and control parameters to be described later are determined based on properties such as consistency at room temperature, heating in step S202 and step S203 are unnecessary. It becomes. Once the circulating blood temperature falls within a predetermined range, blood circulation may be stopped once. This is the preparation stage for diagnostic imaging at death.

  Next, from step S204, it is a stage where a cause of death diagnosis is performed. The control device 105 administers a predetermined amount of contrast medium to the blood vessels of the corpse 111 according to the control parameters of the plan database 106. The plan database 106 includes the rotation speed of the roller pump (blood feed rate), the contrast agent dose, the contrast agent administration rate, the administration start / stop administration timing, the blood suction amount, the suction pressure, and the blood heating temperature. In addition, control parameters relating to the start / stop timing of CT imaging for acquiring CT images, imaging conditions for CT imaging, and the like are stored.

  The start / stop timing of this CT imaging is the length of the blood vessel, the cross-sectional area of the blood vessel, and the blood circulation rate controlled by the extracorporeal circulation device (= contrast agent circulation rate) measured in advance by CT imaging or the like. Therefore, the control device 105 may calculate the arrival time of the contrast medium at the target position. (S204).

  At this time, blood circulation is resumed in order to circulate the contrast medium in the body (S205). Based on each control parameter stored in the plan database 106, the control device 105 instructs the extracorporeal circulation device 104 when the time for the contrast agent to reach the target position of the region to be contrasted has elapsed since the start of contrast agent injection. The blood circulation is stopped and the CT apparatus 108 is instructed to perform CT imaging. Based on this instruction, the CT apparatus 108 starts CT imaging by starting X-ray exposure and collection of projection data (S206).

  Here, the shooting range (here, the distance between the shooting start point and the shooting end point) and the number of shots taken by the shooting interval are set in advance and stored in the plan database 106 in advance. That is, CT imaging ends when imaging within the set imaging range or when the set number of images is taken. As a CT imaging method, conventional imaging for scanning along a circular orbit, helical imaging for scanning along a spiral orbit, and the like can be used.

  After the end of CT imaging, a series or arbitrary one CT image is displayed on a display device (not shown) (S207), and it can be confirmed whether an image of a target region is obtained (S208). It may be.

  In step S208, it is checked whether or not the target region is normally contrast-enhanced. If the target region is not normally imaged, step S207 and step S206 (here, the contrast agent is already used) until it can be confirmed that the image has been normally captured. Since CT is injected, only CT imaging is performed).

  In the last step S209, the doctor visually confirms from the captured CT image whether there is an abnormality that causes death. Here, it is possible to measure the speed of the cause of death by sending an image to the CAD 109 and performing diagnosis support by a computer, but this is not always necessary in this embodiment of the present invention.

  If there are a plurality of estimated causes of death, steps S200 to S209 are repeated while changing the region to be imaged. It is also conceivable to photograph a plurality of parts (for example, the head, neck, chest, and abdomen) as one set according to a predetermined routine without estimating the cause of death in advance.

<First Embodiment>
FIG. 3 is a configuration diagram of the diagnostic imaging system according to the first embodiment of the present invention. The basic configuration is the same as in FIG. With reference to FIG. 3, a more specific embodiment of the medical image diagnostic system of the present invention will be described. Here, a case where abdominal aorta dissection is suspected as a cause of death and the abdominal aorta is imaged by contrast CT will be described as an example.

  The extracorporeal circulation device 104 includes a roller pump 301 that sends out blood and a blood reservoir 302 that stores the returned blood flow. It is possible to control the circulation flow rate obtained by controlling the number of rotations of the roller pump 301 and the driving time of the roller pump determined by the ON / OFF control of the roller pump 301. If the body blood is insufficient, the blood volume can be replenished by adding water, physiological saline, or the like to the blood reservoir 302.

  The roller pump 301 used in the present embodiment is preferably a metering pump such as a roller pump used for an oxygenator. This is because the blood flow rate of the metering pump can be controlled by its rotational speed. If a centrifugal pump is used, it is desirable to use a flow meter or the like because the blood flow rate cannot be controlled by the rotation speed.

  The warming device 103 can heat the blood circulated by the extracorporeal circulation device 104. For example, the warming device 103 includes a heater and a heat exchanger (not shown), and the circulating blood temperature is set within a predetermined temperature range. Control is possible.

  Since the change in the temperature of the contrast medium to be injected causes a change in the injection pressure, particularly in the present diagnostic imaging system for the corpse, by using the heating device 103, not only the heating of the contrast medium itself to be injected is heated. It is necessary to warm the whole blood. The reason for this is that when the time has passed since death, the body temperature of the corpse has decreased. If the blood of the corpse is not heated to a predetermined temperature, the heated contrast medium is cooled by the blood of the corpse. It is because it will be done.

  However, when both the contrast medium and the blood are unified at a constant temperature such as room temperature, and the control parameter is set based on the property at the unified temperature, the heating device 103 is not necessary.

  In FIG. 3, the heating device 103 and the contrast agent administration device 102 are separately shown for ease of explanation, but the heating device 103 reduces the temperature of the contrast agent that has been heated to a predetermined temperature in advance. Including a structure that keeps the heat without. The contrast medium administration device 102 has an injection structure such as a syringe that can accurately administer the amount of contrast medium, and can control the dose of contrast medium.

  The contrast medium administration device 102 and the extracorporeal circulation device 104 to which the heating device 103 is connected may be integrated into one liquid supply device for contrast.

  In the plan database 106, the rotation speed of the roller pump (blood feed rate), the dose of the contrast agent, the administration rate of the contrast agent, and the timing of start / stop of administration so that optimal control is performed for each site to be measured. Control parameters relating to blood suction volume, suction pressure, blood heating temperature, CT imaging start / stop scan timing for obtaining CT images, CT imaging imaging conditions, and the like are stored. The control device 105 reads this and controls the liquid circulation means including the heating device 103, the extracorporeal circulation device 104, and the contrast medium administration device 102, and further controls the imaging timing to the CT device 108 connected via the network 110 or the like. I do.

  First, the doctor incises the body surface of the corpse 111 and inserts the catheters 101a and 101b up to the abdominal aorta 303 under an image guide such as an ultrasonic device (not shown) in order to minimize damage to the corpse. At this time, the embolization materials 304a and 304b are previously injected into the imaging start point A and the imaging end point B of the abdominal aorta under an image guide such as ultrasound, and the blood flow and the flow of the contrast agent are detected at the imaging start point A. The abdominal aorta 303 is closed so as to occur only between the imaging end point B and the imaging end point B.

  As the embolic material, it is possible to use gelatin sponge, PVA (polyvinyl alcohol), bead for blood vessel embolization, metal coil and the like.

  In the above description, the embolic materials 304a and 304b are used. However, any other method may be used as long as the same effect such as ligation of blood vessels by using a clip or a thread can be obtained.

  At the imaging start point A of the abdominal aorta 303, a contrast medium injection port A of the catheter 101a is provided using a puncture needle or the like, and at the imaging end point B, an outlet B of the catheter 101b is also provided using the puncture needle or the like. Since the imaging start point A and the injection port A are substantially the same position, the same symbol A is used, and B is the same. By performing the above-described treatment, preparations for circulating the contrast agent only to the site to be diagnosed are ready.

  The doctor then sends the body into the CT gantry 112. At this time, it is better not to put anything that causes artifacts into the CT gantry 112 as much as possible. Therefore, the extracorporeal circulation device 104, the heating device 103, and the contrast medium administration device 102 are installed outside the CT gantry 112, and only the catheters 101 a and 101 b extending from the extracorporeal circulation device 104 enter the CT gantry 112.

  Next, when the doctor operates the switch of the control circuit 105, the control circuit 105 operates the roller pump 301 of the extracorporeal circulation device 104, and blood circulation is started. The control circuit 105 operates the warming device 103 and waits until the temperature of the circulating blood is set to a predetermined temperature range. After the circulating blood reaches a predetermined range of temperature, the control circuit 105 controls the contrast medium injection device 102 to start the injection of the contrast medium.

  The contrast medium is injected from the injection port A into the abdominal aorta 303 and reaches the discharge port B together with the blood of the corpse. The time required for the contrast medium to reach the outlet B depends on the standard human aorta volume and length or the volume and length of the abdominal aorta measured in advance and the injection speed of the contrast medium in the planning database 106 in advance. Since it is stored, CT imaging is automatically started at the timing when the contrast medium reaches the outlet B. In addition, when it is desired to confirm whether or not the contrast medium has actually reached, it is possible to confirm to which position the contrast medium has been injected by performing CT imaging at a slightly earlier timing on a trial basis.

  An optimum value is set in advance for the number of shots by the shooting range (here, the distance between the shooting start point A and the shooting end point B) and the shooting interval (for example, the slice interval). Shooting ends. In this way, the blood circulation means including the extracorporeal circulation device 104 and the CT device 108 are controlled in conjunction with each other, so that the number of CT images to be photographed and the photographing time can be saved.

  Further, at the end of CT imaging, a series or arbitrary one CT image stored in a storage circuit (database) (not shown) of the CT apparatus 108 can be called on a display device (not shown) to check whether a target image has been taken. . This confirmation may be performed automatically by a doctor using the CAD 109 or the like.

  In the above embodiment, CT imaging is started when the contrast medium reaches the discharge port B. However, CT imaging is started when the injection port A is reached, and CT imaging is terminated when the injection port B is reached, so that the CT contrast change with time can be taken. Such a method of observing changes in hemodynamics over time is called dynamic CT imaging, and this embodiment will be described later.

  According to the first embodiment described above, in the contrast medium injection method by cardiac massage by doctors, it was necessary to circulate blood throughout the body. However, according to this embodiment, blood is collected only at a portion to be photographed. It is possible to circulate.

  In contrast, the conventional method of injecting a contrast medium by cardiac massage is a method in which, after a heart massage, the body is placed in a gantry and CT imaging is performed. The complicated work of moving out of the gantry and performing cardiac massage again occurs. However, according to this embodiment, since blood can be circulated while the body remains in the gantry, the injection of contrast medium can also be added in the gantry. In addition, since the CT imaging is controlled based on the optimal imaging timing calculated in advance from the blood vessel volume, blood circulation speed, and the like, the number of imaging images and imaging time are wasted.

  Moreover, since the body temperature of the corpse has decreased after death, the conditions for the injection pressure and the injection amount of the contrast agent may differ from those of the living body. In the present embodiment, optimal contrast medium injection conditions can be stored in the plan database, and the temperature of the contrast medium and circulating blood can be controlled according to the conditions.

<Second Embodiment>
FIG. 4 is a configuration diagram in the case of imaging a portion with a thin blood vessel (for example, a head region) with the diagnostic imaging system according to the second embodiment of the present invention. In the present embodiment, in addition to the configuration of FIG. 3, a suction device 401 is provided on the discharge port side. The suction device 401 includes a suction pump 402 and, if necessary, a pressure sensor 403. Here, the contrast medium administration device 102, the extracorporeal circulation device 104 to which the heating device 103 and the suction device 401 are connected may be integrated into a single liquid feeding device for contrast.

  The plan database 106 includes a rotation speed of the roller pump (blood feed rate), a contrast medium dosage, a contrast medium administration speed, administration start / stop timing, a blood suction volume, a suction pressure, and a blood heating temperature. In addition, control parameters relating to the start / stop scan timing of CT imaging for obtaining CT images, imaging conditions for CT imaging, and the like are stored. The control device 105 reads this and controls the liquid circulation means including the heating device 103, the extracorporeal circulation device 104, and the contrast medium administration device 102, and further controls the imaging timing to the CT device 108 connected via the network 110 or the like. I do.

  When contrast medium is injected from the neck injection port 404 and circulated through the head region blood vessel 405 to the neck discharge port 406, the head region blood vessel 405 is thin and has a complicated structure. In some cases, blood and contrast media are difficult to circulate. If an injection pressure higher than necessary is applied, the head region blood vessel 405 may be damaged, and the contrast medium may leak out of the blood vessel. In order to prevent such a danger, it is considered that a separate suction pump 402 is provided on the discharge port side to prevent the blood and the contrast medium from stagnation due to a thin blood vessel. Further, by providing the pressure sensor 403, it is possible to prevent an excessive force from being applied to the blood vessel, and it is possible to prevent the cause of death from being accurately determined due to the damage of the blood vessel.

  Further, the suction pump 402 and the pressure sensor 403 are also under the control of the control device 105, parameters of the suction pressure and the blood suction amount are added as control items of the plan database 106, and constant based on the pressure value of the pressure sensor 403. The number of rotations of the suction pump 402 can be controlled to be within the pressure range. In addition, even if it does not have the suction pump 402, if the blood storage tank 302 can be made lower than the dead body 111, it is also possible to obtain a certain blood removal effect by the drop.

  According to the second embodiment described above, in addition to the effects of the first embodiment, image diagnosis at the time of death can be performed safely on a part including a thin blood vessel such as a head region, and moreover, An effect of enabling accurate image diagnosis is obtained.

<Third Embodiment>
FIG. 5 is a flowchart for investigating the cause of death in dynamic CT imaging of the diagnostic imaging system according to the third embodiment of the present invention. FIG. 6 is a diagram showing a standard of imaging delay time of dynamic CT imaging, FIG. 6A is a standard of imaging delay time for a normal living body, and FIG. 6B is a case where individual differences are considered. This is an approximate shooting delay time.

  The system configuration of the present embodiment is the same as that of FIG. 3 or FIG. 4, and the configuration of FIG. 4 is more suitable for a part including a thin blood vessel.

  Dynamic CT imaging is a method of performing CT imaging of a change in the concentration of contrast medium injected over time while injecting contrast medium. In the present embodiment, an example will be described in which this dynamic CT imaging is applied to image diagnosis at death and the arterial phase, portal phase, venous phase, etc. of the liver are measured.

  When performing dynamic CT imaging, since it is necessary to continue stable blood circulation without stopping blood flow, it is necessary to control the flow rates of blood and contrast agent more accurately than in the first embodiment. As a method for accurately controlling the flow velocity, the discharge amount of the roller pump 301 of the extracorporeal circulation device 104 is adjusted to the discharge amount of a standard human heart, and the control parameters stored in the plan database 106 are as follows: For example, as shown in FIG. 6A, it is conceivable to use the contrast agent injection speed and imaging timing used in dynamic CT imaging performed on a normal living body. However, it is also necessary to devise control such as performing CT imaging several times before and after the reference timing in consideration of the special characteristics of the body and individual differences. For example, as shown in FIG. 6B, by providing a shooting start time and a shooting end time, an optimal image can be acquired within this time range even if there are individual differences.

  In addition, the blood state (amount, concentration, viscosity, etc.) in the body of the corpse is measured in advance by blood sampling, ultrasonic examination, etc., and the optimal amount and concentration of the contrast agent are determined in advance and reflected in the plan database 106. Thus, the control circuit 105 can control the contrast agent administration more accurately.

  With reference to FIG. 5, a flowchart of dynamic CT imaging in the liver will be described. Although the figure referred in this description is FIG. 4, a diagnostic site | part is changed from a head to a liver. FIG. 7 is a view showing the liver 71, showing the thoracic aorta 72, the inferior vena cava 73, and the portal vein 74.

  First, in step S500, at least two catheters 101a and 101b are connected to the abdominal aorta 72 and inferior vena cava 73 near the liver of a deceased patient using a percutaneous method such as a puncture needle, and the extracorporeal circulation device 104, A warming device 103 and a contrast medium administration device 102 are attached so that blood can circulate.

  In the next step S <b> 501, the body 111 is moved into the CT gantry 112. In step S502, blood circulation is started and warmed. When the blood of the corpse 111 is insufficient, body fluid is replenished with physiological saline or the like. At this time, the warming device 103 is used, and in step S503, it waits until the temperature of the circulating blood reaches a predetermined temperature, for example, 37 ° C. This is the preparation stage, which is the same as the flowchart of FIG.

  For example, in dynamic CT imaging for observing a tumor in the liver, the early arterial phase that simply depicts the arterial phase, the late arterial phase that is observed by staining the tumor tissue with a contrast agent, and the portal vein are depicted. When diagnosing the four phases of the portal vein phase and the equilibrium phase of observing the tumor WASH OUT, it is necessary to measure the time after the start of the contrast agent and perform CT imaging after the passage of time appropriate for the observation of each phase . Further, the contrast agent injection speed at this time is also controlled.

  The contrast medium injection speed is Vi, the first time for CT imaging of the early arterial phase is T1, the second time T2 for CT imaging of the late arterial phase, and the third time for CT imaging of the portal vein phase is T3. If the fourth time for CT imaging of the phase is T4, for example, the contrast medium injection speed Vi = 5 ml / second, T1 = 20 seconds, T2 = 35 seconds, T3 = 70 seconds, T4 = 180 seconds, and the plan database 106 is registered.

  In step S504, contrast medium injection is started. At this time, the contrast medium administration device 102 is controlled by the control circuit 105 so that the injection speed of the contrast medium becomes Vi. Then, blood circulation is continued (S505).

  In step S506, the control circuit 105 issues a CT scan instruction to the CT apparatus 108 when the first time (T1) has elapsed from the start of the injection of the contrast agent, and performs CT imaging of the early arterial phase. In the next step S507, the contrast image of the early arterial layer is displayed on the display device of the CT apparatus 108.

  Next, in step S508, CT imaging of the late arterial phase is performed when a second time (T2) has elapsed from the start of contrast agent injection. Then, a contrast image of the late arterial layer is displayed on the CT apparatus 108 (S509).

  In step S510, CT imaging of the portal vein phase is performed when a third time (T3) has elapsed from the start of contrast agent injection. Then, a contrast-enhanced image of the portal vein layer is displayed on the display screen of the CT apparatus 108 (S511).

  In step S512, the CT scan of the equilibrium phase is performed when the fourth time (T4) has elapsed from the start of the contrast agent injection. Then, a contrast-enhanced image of the portal vein layer is displayed on the CT apparatus (S513).

  In this way, a four-phase contrast image of the liver is taken. The CT images taken as described above are checked for the presence or absence of abnormalities that cause death by visual observation by a doctor. Alternatively, it is possible to measure the speeding up of the cause of death by sending a photographed CT image to the CAD 109 and performing diagnosis support by a computer. (S514). This step S514 is a confirmation process and is not necessarily required.

  According to the third embodiment described above, it is difficult to perform dynamic CT imaging in the contrast medium injection method by cardiac massage performed by doctors performed outside the CT gantry, but if this embodiment is used, The cause of death can be diagnosed by dynamic CT imaging. In addition, since photographing is automatically performed according to the plan database, the number of CT images to be photographed and photographing time can be largely eliminated.

  According to the diagnostic imaging system of the present invention, even if the number of implementations increases in the future, efficient diagnostic imaging at the time of death can be performed. Therefore, the cause of death is increased and the cause of death is unclear, such as inaccurate epidemiological statistics. There is an effect that various problems caused by the problem are solved.

  In the present embodiment, the CT is used for the image diagnostic apparatus, but this can also be applied to other image diagnostic apparatuses such as an MRI (Magnetic Resonance Imaging) and an ultrasonic diagnostic apparatus. When using another diagnostic imaging apparatus, it can be dealt with by changing the control parameter of the plan database according to each diagnostic apparatus.

  Further, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be appropriately combined. As long as the technical idea of the present invention is used, these modifications are also included in the present invention.

100, 303 ... blood vessels at the diagnostic site,
101a, 101b ... catheter,
102 ... contrast medium administration device,
103 ... Warmer,
104 ... extracorporeal circulation device,
105. Control device,
106 ... plan database,
107 ... input device,
108 ... CT apparatus,
109 ... CAD,
110 ... Network,
111 ... dead body,
112 ... CT gantry,
301 ... roller pump,
302 ... blood reservoir,
304a, 304b ... embolic agent,
401 ... suction device,
402: suction pump,
403 ... Pressure sensor.

Claims (10)

A liquid feed pump that feeds liquid into the body,
A contrast medium administration means for administering a contrast medium to the liquid;
An image acquisition means for collecting an image of the corpse administered with the contrast medium by the contrast medium administration means;
Control means for controlling at least one of the image acquisition timing of the image acquisition means of the contrast medium administration means, the liquid feed timing of the liquid feed pump or the administration timing by the contrast medium administration means,
A medical image diagnostic system comprising:   The medical image diagnosis system according to claim 1, wherein the image diagnosis apparatus is connected to a computer image diagnosis support apparatus.   The medical image diagnostic system according to claim 1, wherein the liquid feeding pump is a roller pump.   The medical image diagnostic system according to any one of claims 1 to 3, further comprising a heating device for keeping the liquid and the contrast medium in a predetermined temperature range.   The medical image diagnostic system according to claim 1, further comprising suction means for sucking a liquid from the blood vessel of the corpse.   The medical image diagnostic system according to any one of claims 1 to 5, wherein a blood vessel unnecessary for blood circulation of the corpse is embolized with an embolic material. A liquid circulating means configured to forcibly circulate the liquid in the corpse and a contrast medium administration means for administering a contrast medium to the circulating liquid;
Control means for controlling the liquid circulation means in accordance with control parameters and a control sequence for obtaining an image of the body;
An image diagnostic apparatus connected to the control means via a network and taking an image of a desired part of the body in accordance with a control command from the control means;
A medical image diagnostic system comprising: A liquid feed pump that feeds liquid into the body,
A contrast medium administration means for administering a contrast medium to the liquid;
Control means for controlling the liquid feed timing of the liquid feed pump and the administration timing by the contrast medium administration means;
A liquid feeding device for contrast use, comprising:   The contrast-feeding apparatus according to claim 8, further comprising heating means for keeping the circulating liquid and the contrast medium in a predetermined temperature range.   The contrast-feeding apparatus according to claim 8 or 9, further comprising suction means for sucking the liquid delivered from the corpse.

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