JP2009023824A - Inventory control support system, and inventory control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inventory control support system and an inventory control method for supporting the inventory control so that a radiation medicine to be used for PET is not wastefully used. <P>SOLUTION: The inventory control support system for performing the inventory control by checking the inventory of a radiation medicine which is used in the inspection by a nuclear medicine diagnostic device and attenuated based on the half life thereof with the interval shorter than the half life comprises a computation means 121 which receives inspection information including the scheduled date of the inspection and the use of the radiation medicine in the inspection, and computes the inventory of the radiation medicine at the scheduled date of the inspection based on the scheduled date, the half life and the inventory at the time of receiving inspection information, and notifying means 122, 103 which compare the use of the radiation medicine in the inspection with the inventory of the radiation medicine at the scheduled date of the inspection, and perform notification of the determination when the inventory is determined to be smaller than the use of the radiation medicine in the inspection. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inventory management support system and an inventory for supporting the management of the inventory amount of F18-FDG (F18-fluor-2-deoxy-D-glucose), which is a radiopharmaceutical used for examination by a PET (Positron Emission Tomography) apparatus. It relates to the management method.

  In recent years, nuclear medicine diagnostic apparatuses such as SPECT (Single Photo Emission Computed Tomography) apparatus, PET apparatus, or SPECT / PET apparatus having both functions have been put into clinical use and attracting attention.

  The SPECT apparatus detects radiation such as gamma rays emitted from an RI (Radioisotope) administered to a subject such as a patient with a radiation detector, and acquires a distribution image of RI in the subject, thereby It is a device that displays an image of a lesion, a function distribution image such as a blood flow rate and a fatty acid metabolism. The PET apparatus includes a plurality of radiation detectors, and performs imaging by simultaneously detecting a pair of gamma rays emitted in opposite directions when a positron is combined with an electron and disappears by using a radiopharmaceutical. It is.

  In inspection using a PET apparatus, F18-FDG is often used as a radiopharmaceutical (see, for example, Patent Document 1). Here, FDG is an abbreviation for fluorodextrose and refers to glucose indexed by a radionuclide.

  Conventionally, for F18-FDG, a method of preparing a cyclotron in a medical facility and preparing it in the facility has been taken. In order to install a cyclotron, a large amount of money, large land, etc. were required. In addition, even if a large amount is created at its own facility, it cannot be legally transferred to others. However, in recent years, F18-FDG has become available for purchase through delivery from drug manufacturers. This eliminates the need for initial investment and maintenance costs for the cyclotron and the like. Moreover, according to the inspection plan, it has become possible to procure in combination with a method based on a preparation in a facility, a purchase selection from a drug manufacturer, or two types of purchase and delivery by delivery. As a result, the introduction and start of PET inspection is expected to become widespread.

JP 2006-133205 A

  However, in the case of RI used for normal SPECT, for example, it was possible to purchase and stock one week at a time a few days ago, but it was possible to use the radionuclide F-18 of F18-FDG used in PET. Since the half-life is very short, 109.8 minutes, it is easy to be wasted if there is a large amount of inventory, and there was a case where the inspection plan was wasted when it was changed. In addition, F18-FDG does not change to expensive in delivery, and since water of O-18 as a raw material is expensive, it is also expensive depending on the preparation in the facility. A large cost loss will occur. Therefore, it is desired to use F18-FDG effectively, and it is required to manage procurement and inventory so as not to waste.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inventory management support system and an inventory management method for supporting inventory management so as not to waste a radiopharmaceutical used in PET. It is to provide.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that an inventory quantity for supporting inventory management of a radiopharmaceutical for PET examination that is attenuated based on a half-life, which is used in an examination by a nuclear medicine diagnostic apparatus, is changed to the half-life. An inventory management support system for performing inventory management by checking at shorter intervals than the above, and at the time of the confirmation, examination information input means for receiving examination information including a scheduled date and time of the examination and the amount of radiopharmaceutical used in the examination; Calculating the amount of the radiopharmaceutical at the scheduled date and time of the inspection based on the inspection information and the current amount of the radiopharmaceutical, and calculating the inventory at an interval shorter than the half-life; The amount of radiopharmaceutical used in the inspection is compared with the amount of radiopharmaceutical stock at the scheduled date of the inspection, and the amount of stock used is the amount of radiopharmaceutical used in the inspection. Characterized in that it comprises a notifying means for informing when it is determined that or is less.

  According to a twelfth aspect of the present invention, the inventory management is carried out by checking the inventory amount of the radiopharmaceutical that attenuates based on the half-life at an interval shorter than the half-life, which is used in the examination by the nuclear medicine diagnostic apparatus. An inventory management method using a support system, wherein at the time of confirmation, a stage of receiving examination information including a scheduled date and time of a test and a use amount of a radiopharmaceutical in the test, the scheduled date and time, the half-life and the test Obtaining the amount of radiopharmaceuticals at the scheduled date and time of the examination based on the inventory quantity at the time of confirmation when receiving the information, the amount of radiopharmaceuticals used in the examination and the amount of radiopharmaceuticals at the scheduled date and time of the examination And a step of notifying when it is determined that the inventory amount at the scheduled date and time of the inspection is less than the amount of radiopharmaceutical used in the inspection. It is characterized in that.

  According to the inventory management support system and the inventory management method of the present invention, taking into account the decay due to the half-life of the radiopharmaceutical used in PET, the inventory amount is obtained at intervals shorter than this half-life, and compared with the usage amount used for inspection. Since the notification is made when the stock quantity is small, the radiopharmaceutical can be appropriately procured, and it is possible to prevent the radiopharmaceutical from being wasted.

  The inventory management support system of the present invention is a system that checks and manages the inventory of radiopharmaceuticals used in PET examinations, and inventory when F18-FDG (also referred to simply as FDG) is used as a radiopharmaceutical. It is a system that supports quantity management. The confirmation interval is set to a period (for example, 30 minutes) shorter than the FDG half-life (109.8 minutes). Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(System configuration)
FIG. 1 is a functional block diagram showing a configuration of an embodiment of an inventory management support system of the present invention. First, the inventory management terminal 1 uses the network N such as a dedicated communication line or the Internet to connect the inspection order apparatus 3, the A terminal 2 installed in the preparation department that prepares F18-FDG in the facility, and F18-FDG. It is connected to the B terminal 4 installed in the medicine manufacturer to be supplied.

  The inspection order apparatus 3 is constituted by a so-called server, and corresponds to, for example, RIS (radiation department management system) or HIS (hospital information system). The inspection order apparatus 3 functions as an input means for inputting inspection order information for the operator of the inspection order apparatus to instruct an inspection request or inspection contents by operating the inspection order apparatus, and the inspection order information through the network N. And a function of transmitting to the inventory management terminal 1 via The examination order information specifically includes a patient name or patient ID, sex, date of birth, examination date and time, and a site to be examined. The examination date and time is the date and time when the radiopharmaceutical is administered to the patient, and indicates the scheduled time in the present invention.

  The A terminal 2 is used by an operator in the pharmaceutical department, and is constituted by a so-called computer terminal. A communication unit 201 that transmits and receives information via the network N, and receives various types of information from the inventory management terminal 1 via the communication unit 201, displays on the display unit 203 based on the received information, A management unit 202 having a web browser function of receiving an input and transmitting information to the inventory management terminal 1 via the communication unit 201 is provided.

  The A terminal 2 receives the ordering information indicating the ordering of the radiopharmaceutical from the inventory management terminal 1 via the communication unit 201. The order information includes the order quantity and delivery time of the radiopharmaceutical. Upon receiving the order information, the operator uses the browser function to input the delivery time and delivery quantity of the radiopharmaceutical for the order from the input means 204. An answer is input, and delivery information indicating the delivery time and delivery amount of the radiopharmaceutical is transmitted to the inventory management terminal 1. It is also possible to send and receive order information or delivery information by e-mail. The delivery time and the delivery amount correspond to the addition date and time and the addition amount of the present invention, respectively, and the delivery information corresponds to the radiopharmaceutical additional information of the present invention.

  The B terminal 4 is used by an operator of a drug manufacturer, and is constituted by a so-called computer terminal. A communication unit 401 that transmits and receives information via the network N, and receives various types of information from the inventory management terminal 1 via the communication unit 401, displays on the display unit 403 based on the received information, A management unit 402 having a web browser function of receiving an input and transmitting information to the inventory management terminal 1 via the communication unit 401 is provided.

  The B terminal 4 receives the ordering information indicating the order of the radiopharmaceutical from the inventory management terminal 1 through the communication unit 401 as in the A terminal 2, and the operator uses the browser function to input the order information from the input unit 404. A reply of the delivery time and delivery amount of the radiopharmaceutical to the order is input, and delivery information indicating the delivery time and delivery amount of the radiopharmaceutical is transmitted to the inventory management terminal 1.

  That is, the A terminal 2 or the B terminal 4 constitutes an input means for inputting delivery information.

  The inventory management terminal 1 is a so-called server that performs confirmation at a confirmation interval (for example, 30 minutes) shorter than the half-life (109.8 minutes) of the F18-FDG that is the radiation reagent. In this case, the inspection order information transmitted from the inspection order apparatus 3 is received, and the stock amount of the radiopharmaceutical in the inspection time of the inspection is registered in the database. Notify when less. In addition, the database is updated in response to the above delivery information and change information indicating a change in the inspection described later. As shown in FIG. 1, the inventory management terminal 1 includes an input unit 104, a display unit 103, a communication unit 101, a storage unit 105, and a control unit 102.

  The display means 103 is for performing various displays such as images and reports, and is composed of an LCD, a CRT, or the like.

  The communication unit 101 includes a transmission / reception interface circuit and executes processing for transmitting / receiving various instructions, various requests, and various data via the network N.

  The input unit 104 includes an input device such as a keyboard and a pointing device such as a mouse for performing various inputs. The operator of the inventory management terminal 1 uses the input unit 104 to input a dose that is the amount of radiopharmaceutical used in each examination. That is, the input means for inputting examination information including the scheduled date and time (examination date and time) of the examination of the present invention and the amount of radiopharmaceutical used (dose) in the examination is constituted by the examination order apparatus 3 and the input means 104. .

  Further, the operator inputs change information indicating a change in the examination date and time or the dose of the radiopharmaceutical for the examination. That is, the input means 104 constitutes an input means for inputting change information. Further, the inspection order apparatus 3 may have a function as a change information input means.

  The storage means 105 is composed of, for example, a hard disk and stores a database for managing the above-described inventory quantity. Here, FIG. 2 shows the structure of the database. As shown in FIG. 2, the database includes, for each examination, the examination date and time, the patient indicating the patient name or patient ID, the examination site, the dose of the radiopharmaceutical, and the inventory of the radiopharmaceutical at the start of the examination. (In FIG. 2, α, β, γ...) Are stored in association with each other as inventory.

  The control unit 102 includes an arithmetic control device (not shown) such as a CPU (central processing unit), includes a program storage unit (not shown) such as a ROM (read-only memory) for storing a program, and the control unit Reference numeral 102 controls each unit in accordance with a stored program, various requests transmitted from the outside via the network N, or instruction information input from the input unit 104. Further, it is configured to include a storage means (not shown) configured by a system memory, a nonvolatile RAM (random access memory), or the like that constitutes a work area when executing the program. In particular, the control unit 102 sets the confirmation interval so as to be shorter than the half-life of the radiopharmaceutical (for example, F18-FDG).

  The control unit 102 includes an inventory amount calculation unit (calculation unit) 121 and a report generation unit 122, and has a function of managing and updating the database and executing notification regarding the inventory amount. The control unit 102 has a function as a reception unit, and receives examination order information or delivery information via the communication unit 101, or receives a dose or change information of a radiopharmaceutical in the examination from the input unit 104.

  First, when the control unit 102 receives the examination order information transmitted from the examination order apparatus 3, the control unit 102 causes the display unit 103 to display a screen for inputting the dose of the radiopharmaceutical. When the operator inputs a dose from this screen using the input unit 104, the control unit 102 receives the input and inputs the examination date and time, the patient, the part, and the examination order information to the database. Register the correct dose.

  Next, the control unit 102 calculates the inventory amount of the radiopharmaceutical at the registered examination date and time by the inventory amount calculation unit 121 and registers the inventory amount in the database. First, an elapsed time from the present time to the inspection date is obtained, and an attenuation rate at the elapsed time is obtained. Here, if the elapsed time is t, the half-life is T, and the decay rate is F (t), the decay rate is expressed as an exponential function, and F (t) = exp (−t / T). The Then, the radiopharmaceutical stock amount at the examination date and time registered is obtained by the product of the radiopharmaceutical stock amount (not shown) at the present time (not shown) and the attenuation rate F (t). This inventory amount corresponds to α in FIG.

  Here, the stock quantity at the present time (at the time of confirmation) is input using the input means 104, for example. In addition, at the present time, if the inspection has already been performed in the past and the inventory amount at that time has been registered in the database, the inventory amount at the present time (at the time of confirmation) is obtained from the elapsed time since the inspection. The product can be obtained from the product with the stock amount after use in the past inspection. That is, the stock quantity of the radiopharmaceutical at the registered examination date and time can be obtained from the stock quantity after use in the past examination.

  Further, when an examination scheduled after the above examination is registered, when the examination date and time, patient, part, and dose of the examination order information are registered in the database, the previous examination is performed. Then, the difference H is obtained by subtracting the dose of the radiopharmaceutical in the examination scheduled immediately before from the stock quantity of the radiopharmaceutical immediately before use at the examination date and time in the examination scheduled in the previous (previous examination). Further, the elapsed time from the inspection date and time of the previous inspection is obtained, and the attenuation rate at the elapsed time is obtained. And the stock quantity in the inspection time of the inspection is obtained by the product of the difference H and the attenuation rate F (t). These stock quantities correspond to β, γ... In FIG.

  In this way, for each examination, the examination date and time, the patient, the site, the dose and the inventory quantity are registered in the database.

  Here, the manner of attenuation of the radiopharmaceutical will be described with reference to FIG. FIG. 6 is a schematic diagram for explaining the state of attenuation. As shown in FIG. 6, when the horizontal axis is time, the vertical axis is inventory quantity, and the initial inventory quantity is A, it attenuates based on the function F (t) during the elapsed time t1, and A × F (t1) It becomes. If a is used, then A × F (t1) −a, and after that, during the elapsed time t2, it is attenuated based on the function F (t), and [A × F (t1) −a] × F (t2). It also decays based on the function F (t).

  In addition, the control unit 102 compares the dose for each examination in the database with the stock quantity at the time of confirmation, and if there is a test in which the stock quantity becomes smaller than (dosage)> (stock quantity), that is, the dosage. For example, the control unit 102 extracts the examination date and time, the patient, the site, the dose, and the inventory quantity of the examination that the inventory quantity decreases from the database, and generates a warning report as shown in FIG. It is created and displayed on the display screen 103. In addition, at the time of the inspection performed on the inspection date after the inspection, the patient, the part, and the dose may be extracted and displayed on the warning report.

  FIG. 3 is an example of a warning report. In the warning report shown in FIG. 3, first, at the top, (dose)> (inventory quantity), that is, the examination date, patient, part, dosage, and inventory quantity for the examination in which the inventory quantity is smaller than the dosage. In the lower row, the patient, site, and dose are displayed at the time of the inspection conducted on the inspection day after the inspection when the inventory amount decreases. Thereby, since each inspection time can be grasped | ascertained, the order time can be grasped. In addition, since the ordering time indicates the time when the stock is reduced, there is no waste caused by placing an order before it becomes necessary. That is, in this example, the control unit 102, the report creation unit 122, and the display screen 103 constitute the notification unit of the present invention. Further, the notification as described above is not limited to display on the display means 103, and for example, notification by electronic mail or means for outputting and notifying voice can be used. In addition, the operator looks at this warning report and places an order for the radiopharmaceutical, but as described above, the half-life of F18-FDG is very short, about 2 hours. There is no such thing as ordering radiopharmaceuticals for testing at the same time. Therefore, the orders placed here are the inspection that reduces the inventory quantity and the inspection that is performed on the inspection date thereafter. This makes it possible to order a radiopharmaceutical for at least the day's examination so that it will not be lost due to attenuation over several days. Also, for example, if the inspection is scheduled to be carried out continuously from the inspection time, the order will be placed in one order, and if there is an interval between inspection times, the order will be placed in two orders as appropriate. Can be done.

  In addition, when the operator operates the input unit 104, the report creation unit 122 may create, for example, a table having the configuration illustrated in FIG. 2 as an inventory report indicating an inventory amount at the inspection date and time of inspection. . For example, the control unit 102 can grasp the inventory quantity by displaying the inventory report on the display unit 103.

  The operator then orders the radiopharmaceutical by looking at the above warning report and inventory report. Warning reports and inventory reports show the number of examinations, examination time, dosage, etc. Based on the information such as examination time, dosage, etc. Easy to judge. For example, when the operator operates the input unit 104, the control unit 102 causes the display unit 103 to display an ordering screen as shown in FIG. As shown in FIG. 4, on the ordering screen, a column for inputting the procurement date and time, a procurement amount, and a column capable of selecting the procurement source of the facility or drug manufacturer are displayed. When the procurement date and time, the input of the procurement amount and the procurement source selection are performed from the ordering screen using the input unit 104, the control unit 102 receives this and receives A as the ordering information via the communication unit 101 according to the selection of the procurement source. Transmit to terminal 2 or B terminal 4. In the A terminal 2 or the B terminal 4, each operator inputs a reply to the order as delivery information, and the A terminal 2 or the B terminal 4 transmits the delivery information to the inventory management terminal 1.

  In addition, when the inventory management terminal 1 receives delivery information via the communication unit 101, the control unit 102 adds the delivery amount to the inventory amount of the delivery time inspection of the delivery information in the database. Then, the control unit 102 updates the stock amount in the database by causing the stock amount calculation means 121 to calculate the stock amount for the subsequent inspection.

  In addition, upon receiving change information in the examination from the input unit 104, the control unit 102 changes the examination date and time or the dose of the radiopharmaceutical for the examination indicated in the examination change information in the database. Then, the control unit 102 updates the stock amount in the database by causing the stock amount calculation means 121 to calculate the stock amount for the inspection and the stock amount for the subsequent inspection.

  Therefore, the control unit 102 has a function as an updating unit of the present invention that performs updating based on delivery information or change information.

  Further, after updating the database at the time of confirmation, the control unit 102 compares the dose for each examination in the database with the stock amount, and sets (dosage)> (stock amount), that is, the dose. When there is an inspection in which the amount of stock is smaller, a report for warning is created by the report creating means 122 and displayed on the display screen 103. Thereby, it is possible to grasp the ordering time as appropriate in accordance with a change in inspection or the like. For example, it is possible to suppress the occurrence of waste by changing the order.

(Registration to database, update, and notification procedure regarding inventory)
Next, the procedure for notification regarding registration, update, and inventory quantity in the database will be described with reference to FIG. FIG. 5 is a flowchart showing a procedure for registration, update, and notification regarding inventory quantity in the database in the inventory management terminal 1.

  First, the control unit 102 receives an input from the communication unit 101 or the input unit 104.

  First, the case where the received information is inspection information will be described. The operator of the inspection order apparatus 3 operates the input means of the inspection order apparatus 3, and the network N receives the inspection order information including the patient name or patient ID, sex, date of birth, inspection date and time, and the part to be inspected. To the inventory management terminal 1.

  First, when the control unit 102 of the inventory management terminal 1 receives the inspection order information transmitted from the inspection order apparatus 3, the control unit 102 causes the display unit 103 to display a screen for inputting the dose of the radiopharmaceutical. When the operator of the inventory management terminal 1 inputs a dose from this screen using the input means 104 (S101, inspection information), the control unit 102 receives this and stores the inspection order information in the database. The examination date and time, patient, site and dosage are registered (S102).

  Next, the inventory quantity calculation means 121 of the control unit 102 calculates the inventory quantity of the radiopharmaceutical for the registered examination time, and registers the inventory quantity in the database (S103). As described above, the stock quantity is obtained based on the attenuation by the stock quantity, the dose of the radiopharmaceutical, and the half-life of the radiopharmaceutical. First, the inventory amount calculation means 121 obtains the elapsed time from the current time to the examination date and obtains the attenuation rate at the elapsed time. The current radiopharmaceutical inventory amount (not shown) and the attenuation rate F (t) are calculated. Find by product. In addition, when an examination scheduled after the above examination is registered, when the examination date / time, patient, region, and dose of the examination order information are registered in the database, the examination immediately before that examination is performed. Then, the difference H is obtained by subtracting the dose of the radiopharmaceutical in the examination scheduled immediately before from the stock quantity of the radiopharmaceutical immediately before use at the examination date and time in the examination scheduled in the previous (previous examination). Further, the elapsed time from the inspection date and time of the previous inspection is obtained, and the attenuation rate at the elapsed time is obtained. And the stock quantity in the inspection time of the inspection is obtained by the product of the difference H and the attenuation rate F (t).

  Here, when the dose and the inventory amount for the examination registered in the database are compared (S108), and (dosage)> (inventory amount) is satisfied (S109, Y), the report creation means 122 displays, for example, FIG. 3 is generated (S110), and the control unit 102 controls to display the warning report on the display screen 103 (S111).

  A case will be described in which the received information is delivery information. The operator of the inventory management terminal 1 places an order for a radiopharmaceutical by looking at the warning report displayed as described above, for example. The operator transmits the necessary procurement date and time and the procurement amount as ordering information to the A terminal 2 in the facility or the B terminal 4 of the drug manufacturer. In the facility or drug maker, each operator of the A terminal 2 or B terminal 4 inputs an answer to this order as delivery information. If it is in the facility, the A terminal 2 is used, and if it is a drug maker, the B terminal 4 is used. Then, an answer to the order is input as delivery information, and the delivery information is transmitted to the inventory management terminal 1. When the control unit 102 of the inventory management terminal 1 receives the delivery information transmitted from the A terminal 2 or the B terminal 4 (S101, delivery information), the control unit 102 checks the inventory amount of the delivery time of delivery information in the database. The delivery amount is added to (S104). Then, the inventory quantity for the subsequent inspection is recalculated by the inventory quantity computing means 121, and the control unit 102 updates the inventory quantity in the database (S105).

  Here, at the time of confirmation, the dose and the stock amount are compared for the updated examination (S108), and when (dosage)> (stock amount) (S109, Y), the report creating means 122, for example, A warning report as shown in FIG. 3 is created (S110), and the control unit 102 controls to display the warning report on the display screen 103 (S111).

  A case where the received information is change information will be described. When the operator of the inventory management terminal 1 uses the input means 104 to input change information indicating a change in the examination date and time or the dose of the radiopharmaceutical for the examination, and the control unit 102 receives the change information (S101). , Change information), the control unit 102 changes the examination date and time or the dose of the radiopharmaceutical indicated in the change information for the examination in the database (S106). Then, the inventory quantity for the subsequent inspection is recalculated by the inventory quantity computing means 121, and the control unit 102 updates the inventory quantity in the database (S107).

  Here, at the time of confirmation, the dose and the stock amount are compared for the updated examination (S108), and when (dosage)> (stock amount) (S109, Y), the report creating means 122, for example, A warning report as shown in FIG. 3 is created (S110), and the control unit 102 controls to display the warning report on the display screen 103 (S111).

In this manner, the inventory management terminal 1 performs registration in the database, updates, and notification regarding the inventory quantity.
In the above-described embodiment, the radiopharmaceutical is described as F18-FDG. However, when a PET preparation that can be delivered is supplied, the radiopharmaceutical can be applied to the drug.

It is a functional block diagram showing an embodiment of an inventory management support system according to the present embodiment. It is a figure which shows an example of a structure of the database memorize | stored in the memory | storage means of the inventory management terminal shown in FIG. It is a figure which shows an example of a structure of the report for warnings. It is a figure which shows an example of the screen for ordering. It is a flowchart shown about the procedure of the alerting | reporting regarding the registration to the database in this Embodiment, an update, and an inventory quantity. It is a schematic diagram which shows the mode of attenuation | damping of a radiopharmaceutical.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inventory management terminal 2 A terminal 3 Inspection order apparatus 4 B terminal 101 Communication means 102 Control part 103 Display means 104 Input means 105 Storage means 121 Inventory quantity calculation means 122 Report preparation means 201 Communication means 202 Management means 203 Display means 204 Input means 401 Communication means 402 Management means 403 Display means 404 Input means N Network

Claims (12)

Inventory management support for inventory management by checking the inventory quantity used in nuclear medicine diagnostic equipment for supporting the inventory management of radiopharmaceuticals for PET inspection that decays based on the half-life at intervals shorter than the half-life. A system,
At the time of the confirmation, examination information input means for receiving examination information including the scheduled date and time of examination and the amount of radiopharmaceutical used in the examination;
Based on the inspection information and the current amount of radiopharmaceutical inventory, the radiopharmaceutical inventory amount at the scheduled date and time of the inspection is calculated, and calculating means for determining the inventory amount at an interval shorter than the half-life;
An informing means for comparing the amount of radiopharmaceutical used in the examination with the amount of radiopharmaceutical stock at the scheduled date and time of the examination and determining that the amount of inventory is less than the amount of radiopharmaceutical used in the examination An inventory management support system comprising:   The calculation means obtains an elapsed time from the confirmation time to the scheduled date and time, obtains an attenuation rate based on the elapsed time and the half-life, and obtains an inventory amount at the confirmation time when the inspection information is received. 2. The inventory management support system according to claim 1, wherein a product of the attenuation rate is obtained, and the product is used as a stock amount of the radiopharmaceutical at the scheduled date and time of the examination.   In the case where the inspection is performed before the confirmation time when the inspection information is received, the calculation means, based on the inventory amount after use in the inspection, the used date and time and the half-life, the confirmation time The inventory management support system according to claim 1 or 2, wherein an inventory quantity is calculated.   The calculation means obtains an elapsed time from the used date and time to the confirmation time when the inspection information is received, obtains an attenuation rate based on the elapsed time and the half-life, and determines the obtained attenuation rate and the inspection The inventory management support system according to claim 3, wherein a product with an inventory amount after use is obtained and the product is an inventory amount at the time when the inspection information is received.   The inventory management support system according to any one of claims 1 to 4, wherein the notification unit notifies the inventory amount determined to be small and the amount of radiopharmaceutical used in the examination. When there are a plurality of examinations and the examination information is received, the calculation means is based on the scheduled date and time of the examination, the half-life and the amount of radiation used in each examination for each of the plurality of examinations. Obtain the inventory of radiopharmaceuticals just before use at the scheduled date and time of the examination,
The notification means compares the amount of radiopharmaceutical used for each examination with the amount of radiopharmaceutical inventory immediately before the scheduled date and time of the examination, and determines that the amount of inventory is less than the amount of radiopharmaceutical used for the examination. The inventory management support system according to claim 1, wherein the inventory management support system notifies when it is made.   The calculation means obtains an elapsed time from the scheduled date and time of the examination prior to the examination to the scheduled date and time of the examination, obtains an attenuation rate based on the elapsed time and the half-life, and determines the scheduled date and time of the previous examination. The inventory management according to claim 6, wherein a product of a difference between an inventory amount immediately before use and a usage amount at that time and the obtained attenuation rate is obtained, and the product is used as an inventory amount of the radiopharmaceutical at the scheduled date and time of the inspection. Support system.   The notifying means notifies the stock amount determined to be small, the amount of radiopharmaceutical used in the inspection, the scheduled date and time of the inspection to be performed after the inspection on the inspection day for performing the inspection, and the amount of radiopharmaceutical used. The inventory management support system according to claim 6 or 7. Storage means for storing the scheduled date and time of the received examination, the usage amount of the radiopharmaceutical in the examination, and the inventory amount of the radiopharmaceutical at the scheduled date and time of the examination determined by the calculation means;
Receiving change information indicating a change in the scheduled date and time or radiopharmaceutical usage for the stored examination, and updating the scheduled date and time or radiopharmaceutical usage stored in the storage means based on the change information. And an update means for causing the calculation means to newly determine an inventory amount and updating the stored inventory amount of the radiopharmaceutical with the determined inventory amount,
The inventory management support system according to any one of claims 1 to 8, wherein the notification unit performs the comparison after the update and determines that the inventory amount is small.   10. The inventory management support system according to claim 9, wherein when at least one of the scheduled time, the usage amount, and the inventory amount is changed, confirmation is performed immediately.   The update means receives radiopharmaceutical additional information indicating an addition date and time and an additional amount of the radiopharmaceutical, and further updates the stock quantity of the radiopharmaceutical stored in the storage means based on the radiopharmaceutical additional information. Item 10. The inventory management support system according to Item 9. This is an inventory management method that uses an inventory management support system that performs inventory management by checking the inventory of radiopharmaceuticals that decays based on the half-life at intervals shorter than the half-life, which is used in inspections by nuclear medicine diagnostic equipment. And
Receiving examination information including the scheduled date and time of examination at the time of confirmation and the amount of radiopharmaceutical used in the examination;
Obtaining the inventory amount of the radiopharmaceutical at the scheduled date and time of the examination based on the scheduled date and time, the half-life and the inventory quantity at the confirmation time when the examination information is received;
Comparing the amount of radiopharmaceutical used in the examination with the inventory of radiopharmaceuticals at the scheduled date of the examination;
An inventory management method comprising a step of notifying when it is determined that an inventory amount at a scheduled date and time of the inspection is less than a usage amount of a radiopharmaceutical in the inspection.

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