JP3482690B2 - Surgical instrument position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to surgical navigation.
It is also known as a system for surgery and biological sampling.
When a surgical instrument such as a suction tube is inserted into the subject
Shows where in the subject the surgical instrument is located
X-ray CT images collected before surgery,
Intraoperative surgical instruments on MRI or X-ray fluoroscopic images
The position is superimposed and displayed, and the position information of the surgical instrument is displayed.
"Record" to create a file (location information file)
The location containing the desired location information from the created file
Select the location information file and "play" it.
Position of surgical instruments with "record" and "replay" functions
It relates to a display device. [0002] 2. Description of the Related Art Intraoperative hands are added to tomographic images collected in advance.
Surgical instrument position display that superimposes and displays surgical instrument positions
Examples of the apparatus include the following. (1) NEURO-NAVIGATOR (“Three Dimensional Digitize
r (Neuronavigator): New Equipment Computed Tomograph
y-Guided Stereotaxic Surgery '': E. Watanabeet al .: Su
rg Neurol 1987; 27: p543-p547) (2) “Medical three-dimensional localization device” (Japanese Patent Laid-Open No. 03-106)
No. 359) (3) “Stereotactic brain surgery support device” (Japanese Patent Laid-Open No. 03-2670)
No. 54) (4) "3D position display device in the body" (JP-A-03-28)
No. 4253) [0003] In these devices, postoperative examination is required.
In addition, the position of the surgical instrument during the operation at a certain point in time or within a certain time
The position (trajectory) is "recorded" or the position of the recorded surgical instrument
Function to play back and display
This function is configured, for example, as follows. When the function is “recording”, the surgical instrument
Based on the position information from the position detecting means for sequentially detecting the positions of
Then, the image selecting means is used for each position of the region of interest of the subject.
Image data is stored in the image storage means for storing the image data of the tomographic image.
Select the data. And the previous on the selected image data
The predetermined pattern of the surgical instrument is registered at the position indicated by the position information.
The position information storage means stores the position information.
Information is associated with the selected image data and
Automatically store as an information file with an appropriate file name
You. For example, the file name of the image data
An additional number is added to the file name according to the order of recording. Furthermore this
The time when the “recording” of the position information of the surgical instrument was started,
The time information at the end of this process is
File. If the function is "play",
All location information files stored in the location information storage means
The time information is displayed along with the file name of
Select a location information file containing the location information of the desired surgical instrument.
Select. When a location information file is selected, the location information
The location information of the surgical instruments written in this file
The information is sequentially output to the image selecting means and the image synthesizing means. This
As a result, image data corresponding to the position information is stored in the image.
The position of the surgical instrument on this image data
Are sequentially superimposed and displayed. Looking at this display, the surgeon
Should be examined postoperatively. [0006] However, this is not the case.
In the case of the conventional example having such a configuration, the following problem occurs.
is there. In other words, when performing “recording”, the position of the surgical instrument
Time information (record start time and end time) along with the information
Is written to the location information file.
Appropriately added when selecting a file to perform "raw"
The position of the desired surgical instrument based on the file name and the time information
It is very difficult to select a location information file containing location information.
It is difficult. For example, in tumor removal surgery for the head,
Study, craniotomy, duraectomy, tumor reach,
There are surgical procedures such as "complete extraction".
Location information including location information of surgical instruments corresponding to specific processes
It is very difficult to select a report file. Especially the hands
If the surgery lasts as long as 24 hours, for example,
The location information is enormous, and as a result, this location information is enormous.
Of a large number of location information files or the same location information file
Distributed over a huge number of logically divided areas (logical areas)
You. In such cases, a procedure corresponding to the desired surgical procedure is performed.
A location information file containing location information of surgical instruments, and location information
Position of the surgical instrument in the file corresponding to the desired surgical procedure
The logical area where the information is stored is assigned to the file name of the image data.
And the numbering and opening of records in accordance with the
Very difficult to find based on start / end time
You. [0007] Further, after selecting the file, the location information file
Based on the location information written on the
Even if the position information is sequentially superimposed on the tomographic image and displayed,
Only the location information of the device is displayed. Therefore,
The position of the surgical instrument regenerated and displayed in any stage of the surgery
It is unclear whether the operation is detailed while watching this playback display.
There is a problem that it is difficult to make a later study. The present invention has been made in view of such circumstances.
The primary purpose is to address the desired course of surgery.
Select a location information file containing the location information of the corresponding surgical instrument
The second purpose is to make the selection easier.
To conduct a detailed study of the surgery based on the placement information file
To provide a surgical instrument position display device
And [0009] SUMMARY OF THE INVENTION The present invention provides such a device.
In order to achieve the purpose, the following configuration is adopted. Sand
The surgical instrument position display device according to the present invention is
Pre-stores image data of tomographic images for each position of interest
Image storage means to be operated and the positions of surgical instruments in a predetermined cycle.
Position detecting means for detecting next and outputting position information;
Image data from the image storage means based on the location information.
Image selecting means for selecting next, and on the selected image,
A position indicating the position of the surgical instrument at the position indicated by the position information
Image synthesizing means for superimposing a pattern;
Display means for displaying an image synthesized by the means.
For example, the location information of the surgical instrument is "recorded" and saved in a file.
(Location information file) and create a file
Select the location information file containing the desired location information from among them
And then "play" this "record" and "play"
In a position display device of a surgical instrument having a function of
(A) Shows the process of surgery, such as "craniotomy" and "dural resection"
Index input means for inputting terms (index)
And (b) an index from the index input means.
And the time when this index was entered.
Index information storage that stores as index information
And (c) if the function is “record”,
The position information from the position detecting means is stored in the selected image data.
As well as the location information.
Index information stored in the index information storage means and
Link and use this as a location information file
File name, and if the function is "Play", select
The location information of the location information file is stored in the
And a position information storage means for sequentially outputting to the image synthesizing means.
And (d) if the function is "play",
All location information files stored in the location information storage
Related to each location information file along with the file name of the file
Outputting the attached index information to the display means,
Location information of the location information file selected from these
Is stored in the position information storage means,
And sequentially output to the image synthesizing means,
Index information related to location information is displayed on the display means.
Output and the time of the index information and the position
According to each position information based on the predetermined detection cycle of the output means
Index for outputting time and elapsed time to the display means
And operating means. [0010] The operation of the present invention is as follows. Position detection
Means for selecting an image based on the position information of the surgical instrument from the means.
The column indicates the region of interest of the subject stored in the image storage means.
Select the image data of the tomographic image. On this selected image
At the position indicated by the position information indicates the position of the surgical instrument
A predetermined pattern is superimposed by the image synthesizing means on the display means.
indicate. [0011] The operator can use the index input means.
Terms that indicate the process of surgery, such as "craniotomy" or "duraectomy"
(Index). This entered index
Index and the time when it was entered along with index information
Is stored in the index information storage means. Function
In the case of "record", the position information storage means detects the position.
Associating location information from a means with selected image data
And the upper part of the position is stored in the index storage means.
This is associated with the stored index information and
It is stored with an appropriate file name as the location information file. If the function is "play",
Location information files stored in the location information storage means.
Associated with each location information file along with the file name of the file
Index information obtained by the index operation means.
Is displayed on the display means. Thus, the location information file
Index information associated with the
Term indicating the process and the input time is the location information file name
Is displayed along with the index information.
Information file containing the desired location information
Can be found. Further, when a position information file is selected,
The location information storage means stores the location of the selected location information file.
Information is sequentially output to the image selecting means and the image synthesizing means.
You. At the same time, the index operation means
Outputs the index information associated with the report to the display means
Or the time of the index information and the predetermined
Time and index according to each position information based on the
Display the elapsed time from the time the
Power. The index associated with location information in this way
Information is displayed on the display along with the location information.
During the operation process indicated by the location information and during the process
You can know the time. [0014] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
explain. FIG. 1 shows a position display of a surgical instrument according to the present invention.
FIG. 2 is a diagram illustrating a schematic configuration of an embodiment of the device. In the figure, reference numeral 1 denotes an operation on which a subject M is mounted.
It is a stand. Reference numeral 2 indicates the subject M during the operation by the operator.
Surgical instruments to be inserted. 3D on operating table 1
The magnetic sources 3a for generating magnetic fields in the directions
It is arranged so that the relative position with respect to the sample M does not change.
You. The magnetic source 3a is attached to the subject M itself.
It may be fixed. The surgical instrument 2 has a magnetic source 3a
The magnetic sensor 3b for detecting the generated three-dimensional magnetic field
It is attached. As shown in FIG. 2, the magnetic source 3a
Three magnetic fields that generate magnetic fields in the X, Y, and Z directions
Coil 3_aX, 3_aY, 3_aZIt is composed of Magnetic saw
The switch 3a is connected to the driving circuit 4 and the driving circuit 4
Generates a three-dimensional magnetic field H when given a current
You. Similarly, the magnetic sensor 3b has three cores orthogonal to each other.
Il 3_bX, 3_bY, 3_bZIt is composed of Magnetic sensor
3b is connected to the detection circuit 5. This detection circuit 5
Is for each coil 3_bX, 3_bY, 3_bZAmplification of the detection signal from
Output the position data converted to an appropriate digital signal.
You. The magnetic source 3a, the magnetic sensor 3b, the drive circuit 4,
The output circuit 5 and the position calculation unit 7 described later
Corresponding to position detection means. The image processing computer 6 mainly operates
Calculation of the position of the tip of the instrument 2 and selection of an image according to the position information
Synthesis of the pattern of the surgical instrument 2 on the selected image
Is what you do. Functionally divide the internal structure
And a position calculation unit 7, an image selection unit 8, and an image synthesis unit 9.
You. The position calculation section 7 receives the position data from the detection circuit 5.
3D position and direction of the magnetic sensor 3b based on the data
Is calculated, and based on the size and shape of the surgical instrument 2,
Position information including the position of the tip of the
You. The magnetic source 3a and the magnetic sensor 3 described above are used.
b to calculate the three-dimensional position and direction of the magnetic sensor 3b
For example, Japanese Patent Laid-Open Publication No.
Therefore, the description is omitted here. The image selecting section 8 receives the position from the position calculating section 7.
Information (position information including the position of the distal end of the surgical instrument 2)
Then, the image data of the required tomographic image is stored in the image memory 10.
To be selected, corresponding to the image selection means in the present invention.
I do. The image memory 10 stores information on each region of interest of the subject M.
It stores image data of tomographic images of the heart part.
The invention corresponds to the image storage means in the invention. The image synthesizing section 9 is selected by the image selecting section 8.
The position calculated by the position calculation unit 7 on the selected image
A predetermined pattern indicating the position of the surgical instrument 2 at the position indicated by the placement information
Layer. The image synthesizing unit 9 according to the present invention
It corresponds to an image combining means. The image synthesized by the image synthesizing unit 9
The image is displayed on the monitor 20 corresponding to the display means in the present invention.
Given to. The index input unit 25 includes a keyboard or the like.
"Craniotomy", "dural resection"
Enter terms (index) indicating the process of surgery, such as
It is for. The index input unit 25
It corresponds to the index input means in the invention. In addition
The index input unit 25 includes an index in advance in addition to the keyboard.
Paste the dex or input key displayed
You may comprise with the input pad provided. In addition, various
With a memory for storing the index,
Even if it is configured to display and select the index of
Good. The index memory 12 stores an index
The index input from the input unit 25 and the index
The time when the index was input and the index information
And memorize. The index memory 12 is used in the present invention.
It corresponds to an index information storage unit in the present embodiment. The position information memory 14 has the following functions.
You. The function input from the function selector (not shown)
In the case of “record”, the position information from the position calculation unit 7 is displayed.
Associating with the image data selected by the image selection unit 8
At the same time, the position information is recorded in the index memory 12.
Associate it with the remembered index information and position it
Store as an information file with an appropriate file name. Further
If the function is "Play",
The position information of the report file is stored in the image selecting unit 8 and the image synthesizing unit.
9 sequentially. The position information memory 14 is used in the present invention.
Corresponds to the position information storage means. The image memory 10 and the index
The memory 12 and the position information memory 14 include, for example, a hard disk drive.
Each logical storage unit is stored in the external storage device 15 such as a disk device.
The storage area is set up vertically. The index operation unit 30 has a function
If it is "raw", it is stored in the position information memory 14
Along with the file names of all location information files
Index information associated with the location information file
Output to the monitor 20. And the selected location information file
File position information is selected by the position information memory 14
Output to the unit 8 and the image synthesizing unit 9 sequentially,
Monitor 20 monitors index information related to the position information.
Or the time and position calculation unit 7 of the index information.
Time and elapsed time according to each position information based on the predetermined cycle of
The interval is output to the monitor 20. Index operation unit 30
Corresponds to the index operation means in the present invention.
You. Next, referring to FIG. 3 to FIG.
The collection will be described. As shown in FIG.
Around the site of interest of the placed subject M (in this example, the head)
Markers P at four places on the body surface₁, P_Two, P_Three, P_FourTo
paste. Then, in the region including the site of interest of the subject M
Multiple slice planes S₁~ S_nTomographic image of each marker
P₁, P_Two, P_Three, P_FourWith X-ray CT equipment
Shooting. The tomographic image I thus obtained₁~ I_n
Is schematically shown in FIG. This tomographic image I₁~ I_nIs the subject
Photographed for each body and each region of interest, then
Image memory with file name assigned as image file
10 is stored. This state is shown in the schematic diagram of FIG. This
Like image file F_F1~ F_FnIs the subject and interest
Assign a unique file name to each part so that it can be identified
The image data is provided and stored in the image memory 10. After the acquisition of the tomographic image is completed,
Perform an action. Calibration collects tomographic images
Coordinates (CT coordinate system) specific to the device (X-ray CT device)
Image of the tomographic image in the image memory 10 represented by
The data corresponds to the real space coordinates of the surgical instrument position display device
It is a work to attach. This calibration is
Is done as follows. First, an image file name (image file
F_F1), And then the area of interest at the tip of the surgical instrument 2
Marker P attached to the position₁~ P_FourIndicate one by one
And input means such as a keyboard (not shown).
The position information of the distal end of the surgical instrument 2 at the time of
To memorize. Then, the marker stored in the position calculation unit 7 is
Car P₁~ P_FourSpace at the tip of surgical instrument 2 corresponding to
Coordinates and the marker P in the CT coordinate system of the image memory 10₁
~ P_FourIs associated with the eigenspace coordinates. Further image notes
Each tomographic image I stored in the library 10₁~ I_nEigenspace of
Rewrite the coordinates with real space coordinates. After performing such a calibration
First, the subject M is operated on. In the following description,
Take the "head tumor removal surgery" of the body M as an example. This surgery
“Craniotomy”, “Duraectomy”, “Tumor reach”, “Tumor removal”
The process of surgery. Referring to FIG. This figure shows a tomogram and surgery
The position of the device 2 is superimposed and displayed on the monitor 20.
FIG. The "craniotomy" surgical instrument 2 is used to
Craniotomy of the heart. Before performing this craniotomy,
Input the index “open” from the input box 25
I do. The entered index “open” is the index
Time when the box was entered (here, 10:00:00
Index memo together with index information
It is stored in the file 12 with an appropriate file name (see FIG. 7).
Here, the index information file F_I1File name
For example, it is assumed that “III” is added. Then, the "record" function is instructed by the operator.
Then, the position information of the surgical instrument 2 from the position calculation unit 7 is
Output to the image selection unit 8 and the image synthesis unit 9
Is stored in the position information memory 14. And image selection
The unit 8 stores a tomographic image corresponding to the position information from the image memory 10.
The selected tomographic image is output to the image synthesizing unit 9. Image
The component 9 is configured to determine the position indicated by the position information on the selected image.
And a predetermined pattern P indicating the position of the surgical instrument 2
Let The synthesized image is displayed on the monitor 20.
Therefore, the surgeon performs an operation while watching this. Surgical instrument 2
The position of the distal end portion is shown in FIG.
So, tomographic image I₁Position L above₁~ L_ThreeWas moved
And Position information created in the position information memory 14
The file is associated with the image file in the image memory 10.
(See FIG. 7). This association is
F_F1File name with an appropriate number added to the file name of
This is performed by using the position information file name. example
If the image file F_F1File name is "AAA"
In the case, the location information file F_L1The file name of this
An additional number of digits is added to make “AAA01”. This location
Report File F_L1Is further stored in the index memory 12
Index information file F_I1Associated with Relation
The current index information file F_I1The latest
Performed on index information, for example, index
Information file F_I1In the file name ("III")
What is the latest index information in the file
Is added (index value “01”)
This is done by index name. This index
The name L of the surgical instrument 2 after the name₁~ L_ThreePositional equivalent to
Information is written. "Duraectomy" Next, the surgical instrument 2
The dura at the craniotomy site of the specimen M is excised. Before performing this resection
In advance, "dural resection" is called from the index input unit 25 in advance.
Enter the index. Index memory 12
Index information file F_I1The index “open
Index after index “10:00:00”
Dex "dural resection", time index "10:30:00"
Is added (see FIG. 8). Surgical instrument 2 is an operator
As a result, as shown in FIG.
Tomographic image I_TwoPosition L above_Four~ L₆Is moved.
In addition, the code | symbol T in a figure shows a tumor. The position information file F in the position information memory 14
_L1Contains the index information file F_I1To the file name
Index name with index value “02” added
(“III02”) was added.
Position L of surgical instrument 2_Four~ L₆Adds location information equivalent to
(See FIG. 8). Hereinafter, as described above, "tumor reaching" and "tumor"
The location information memory 14 and index
The contents of the memory 12 are as follows. "Tumor arrival" Surgery as shown in FIG.
Instrument 2 is a tomographic image I_TwoPosition L above₇~ L₉Is moved
You. By this process, the location information file F_L1Figure 9
Index name ("III03") and position as shown in
L₇~ L₉Is added, and the index
Index information file F in the memory 12_I1The "tumor
Index information of "Arrival" and time "11:10:00" is added.
Is done. [Tumor extraction] Surgery as shown in FIG.
Instrument 2 is a tomographic image I_TwoPosition L above_Ten~ L₁₂Is moved
You. By this process, the location information file F_L1Figure 1
0 and the index name ("III04")
L_Ten~ L₁₂Location information equivalent to
Information file F in the index memory 12_I1To
Index information of “tumor extraction” and time “11:40:00”
Will be added. After the operation is completed by the above steps,
Consider surgery. When conducting this review, first consider
Position including position information of surgical instrument in one process of operation to be performed
Select the location information file. First, the "play" function is selected, and
The index operation unit 30 stores the information in the position information memory 14.
The file names of all the location information files
To the location information file,
Consecutive index information from index memory 12
It is read and output to the monitor 20. Monitor 2 at this time
FIG. 11 shows a schematic diagram of the zero. Specifically, the file name "AAA01"
Location information file F_L1Position information as index information
The two-digit number added to the index name of the information file
Index information file name excluding the index value ("II
I ") file F_I1Index information stored in
Display all information. Here, the "open"
Head, duraectomy, tumor reach, tumor removal
The time when these were entered is displayed along with the index.
It is. Thus, along with the location information file name,
Linked index information, that is, the operation process
Index and its input time are displayed on the monitor 20
The location information file containing the desired location information.
Can be easily found. Here, the location information of the file name "AAA01"
Report File F_L1When you select, the
The position information is sequentially output to the image selecting unit 8 and the image synthesizing unit 9.
Is forced. The image selection unit 8 according to the output position information
Is the location information file F_L1File name ("AAA0
1 ”) except for the two-digit number added to the file name (“ A
AA ") image file F_F1Select from image memory 10
And tomographic image data I corresponding to the position information₁Drawing
Output to the image synthesizing unit 9. The image synthesizing unit 9 outputs the tomographic image data.
Data I₁Hand on the position indicated by the position information on the image
A predetermined pattern P indicating the position of the surgical instrument 2 is superimposed on the
The data is output to the monitor 20 (FIG. 12A). At the same time, the lower part of the composite image on the monitor 20
Displays the index information according to the location information.
You. More specifically, the index operation unit 30 operates the position information file.
File F_L1Index name based on the index name
Index information file F in the memory 12_I1("II
I ") and select the index corresponding to the index value
Output to the monitor 20. Here, the position information L₁
The predetermined pattern P of the surgical instrument 2 is displayed at the position corresponding to
0 and the index name ("III0
1)) and the index “open” and the time “10: 00: 0”
"0" is displayed (FIG. 12A). Next, position information L_TwoIs output,
A predetermined pattern P of the surgical instrument 2 is displayed at a corresponding position.
Along with the index “open” and the time “10:00:03”
(FIG. 12B). At this time, the position calculation unit 7
Shows a case where the period of the position calculation of is 3 seconds.
Position information file F based on the time of index information_L1
Index based on the storage order of location information in
Calculated by the operation unit 30 and output to the monitor 20
I have. Surgery based on position information sequentially as described above
With the predetermined pattern P of the appliance 2 being superimposed and displayed
Shows index information related to location information,
Location information file F_L1Reaches next index name in
And the display on the monitor 20 is as follows. Location information L_Four
The predetermined pattern P of the surgical instrument 2 is displayed at a position corresponding to
And the index “dura excision” and time “10:30:
00 "is displayed (FIG. 12C). Thus, the position of the surgical instrument 2 during the operation
Surgical device based on the location information in the location information file that stores the information
Associated with the predetermined pattern P of the tool 2 and its position information
Index information is sequentially displayed on the monitor 20.
Then, the process in the surgery indicated by the position information and the time of the process
And the elapsed time. Therefore, after surgery
Detailed examination of the operation can be performed. It should be noted that, based on the position calculation cycle of the position calculation unit 7,
And the index operation unit 30 is the index information
The elapsed time at each position information is calculated based on the time
Display the elapsed time together with the index on the monitor 20
You may do so. Note that, in the above embodiment, the entire operation
The location information of the surgical instruments is stored in a single location information file F._L1
But a location information file was created for each surgical procedure.
To record the position information of surgical instruments in one process
You may do so. Create multiple location information files
FIG. 13 is a schematic diagram showing the state in which the process is completed. Like this
A plurality of location information files F corresponding to each process_L1~ F_L4
(File name is "AAA01-AAA04")
Is one index information file F_I1Associated with
Have been. Furthermore, these plurality of location information files
Then, the index operation unit 30 stores the
Enter the file names of all the stored location information files.
Output to the monitor 20 and to each position information file
Relevant index information in index memory 12
And outputs it to the monitor 20. Monitor at this time
FIG. 14 shows a schematic diagram of No. 20. As described above, the position information file is provided for each step of the operation.
Create a file and one operation corresponds to each file
Information on the position of surgical instruments during the desired surgery.
It can be displayed quickly, and post-operative surgery can be considered.
It will be easier. Further, the position information of the position information file and the
Index information is linked to the index information file.
File that stores the file name and index information of
I went with the index name represented by the delivery number and this
Various modifications can be made without limitation. example
In other words, the index information is
Index information file.
May be associated with the user information file name.
No. In the above embodiment, the magnetic sources 3a and
And the position of the surgical instrument 2 using the magnetic sensor 3b and the like.
However, the present invention is not limited to this, for example,
Attach the surgical instrument 2 to the tip of the multi-joint arm,
By detecting the angle of the arm in minutes, the surgical instrument 2
You may comprise so that a tip position may be detected. [0052] As is clear from the above description,
According to the description, the information associated with each location
Index information is displayed by index operation means
The term indicating the surgical procedure and the input time
Is displayed together with the file name of the
Based on the index information of
The location information file can be easily found. Further, when a position information file is selected,
Move to the position on the image corresponding to the location information in the location information file.
The specified pattern of the surgical instrument is displayed and the index is displayed.
The index operation means, the index associated with the position information.
Output index information to display means, index information
Location information based on the time of the
The time from the time corresponding to the
Since the overtime is output to the display means, the operation indicated by the position information
Process and the elapsed time in the process.
You. As a result, the temporal context of multiple steps in the surgery
And what kind of scene it is in one process
So you can do a detailed review of the surgery
it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a schematic configuration of a position display device of a surgical instrument according to an embodiment. FIG. 2 is an explanatory diagram of a magnetic source and a magnetic sensor. FIG. 3 is a diagram related to description of acquisition of a tomographic image. FIG. 4 is a schematic diagram of a collected tomographic image. FIG. 5 is a schematic diagram showing a storage state of an image file in an image memory. FIG. 6 is a schematic diagram of a composite image displayed on a monitor. FIG. 7 is a schematic diagram showing the association of each file. FIG. 8 is a schematic diagram showing the association of each file. FIG. 9 is a schematic diagram showing the association of each file. FIG. 10 is a schematic diagram showing the association of each file. FIG. 11 is a schematic diagram of a monitor when a position information file is selected. FIG. 12 is a schematic diagram of a composite image and index information displayed on a monitor during reproduction. FIG. 13 is a schematic diagram showing a modification of the association of each file. FIG. 14 is a schematic diagram of a monitor when a position information file is selected. [Description of Signs] 1 ... Operating table 2 ... Surgical instrument 3a ... Magnetic source 3b ... Magnetic sensor 4 ... Driving circuit 5 ... Detection circuit 6 ... Image processing computer 7 ... Position calculation unit 8 ... Image selection unit 9 ... Image synthesis unit 10 ... Image memory 12 ... Index memory 14 ... Position information memory 15 ... External storage device 20 ... Monitor 25 ... Index input unit 30 ... Index operation unit

Claims (1)

(57) [Claims 1] An image storage means for preliminarily storing image data of a tomographic image for each position of a site of interest of a subject, and a position of a surgical instrument is sequentially detected at a predetermined cycle. Position detecting means for outputting position information, image selecting means for sequentially selecting image data from the image storage means based on the position information, and a surgical instrument at a position indicated by the position information on the selected image. Image synthesizing means for superimposing a predetermined pattern indicating the position of the surgical instrument, and display means for displaying an image synthesized by the image synthesizing means. To create
A position display device for a surgical instrument having the functions of "recording" and "reproduction", wherein a position information file containing desired position information is selected from the created files and "reproduced" is selected. Index input means for inputting a term (index) indicating an operation process such as "craniotomy" or "dural resection"; (b) an index from the index input means; a time when the index is input; And (c) when the function is “recording”, associates the position information from the position detection unit with the selected image data, and stores the position information in the selected image data. It is associated with the index information stored in the index information storage means, and this is used as an appropriate file as a position information file. A position information storage unit for sequentially outputting position information of the selected position information file to the image selecting unit and the image synthesizing unit when the function is “playback”; When the function is “playback”, the index information associated with each position information file is output to the display unit together with the file names of all the position information files stored in the position information storage unit. The position information of the position information file selected from among the position information file is sequentially output to the image selecting means and the image synthesizing means by the position information storage means, and the index information related to the position information is output to the display means. Or a time or an elapsed time corresponding to each position information based on the time of the index information and a predetermined detection cycle of the position detection means. Position display of the surgical instrument, characterized in that and an indexing means for outputting the serial display means.