JPH03240135A - Ct device - Google Patents

Abstract

PURPOSE:To omit the useless processing time from the start of the advance processing to the interruption of the interruption processing and simultaneously to omit the troublesome re-preparatory operations including the resetting of a parameter, etc., by providing a continuous execution means. CONSTITUTION:When the preceding processing with the interruption processing is interrupted, a general-purpose CPU 1 holds various kinds of information relating to the interrupted processing in the storing area 5b of a magnetic disk 5. Then the CPU 1 turns on the store flags set up on the control tables 2a and 4a and sets the processing interruption executing position of an interruption pointer. When the preceding processing is restored, the storage information stored in the area 5b are returned to the original general-purpose memories 2 and 4 of the CPUs 1 and 3 respectively. Then the positions of interruption pointers set on the tables 2a and 4a are read and the processing is carried out at the processing unit subsequent to the positions of those pointers. Thus, it is possible to omit the useless processing time till the interruption of the preceding processing and also to omit the troublesome repreparatory operations including the resetting of a parameter, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention enables interrupt processing while a specific process among a plurality of processes is being executed, and returns to the specific process after the interrupt process is completed. The present invention relates to a CT table device configured to be executable.

[Conventional technology]

In general, it is configured to be capable of performing many types of processing, including CT table equipment, measurement processing, various analysis processing, and external storage processing such as FD and MT. Each process has a function (priority interrupt processing function).

Conventionally, this priority interrupt processing function, when a request for execution of a priority process is generated, forcibly terminates the process currently being executed and executes the requested process in its place.

[Problem to be solved by the invention]

However, with conventional devices, when executing an interrupt process, the results of the process that has been executed halfway and the initialized parameters are all lost, so if you want to re-execute the interrupted process, you need to set it again from the beginning. , needed to be processed.

Therefore, when a process that takes a long time to process is interrupted, the processing time required until the process is interrupted is wasted.

Further, in cases where there are many parameter settings and preparation operations are complicated, there are problems in that resetting and re-preparation operations become extremely troublesome.

An object of the present invention is to eliminate wasted processing time from the start of the process to the interruption when re-executing the process after interrupting a process for execution of an interrupt process, and to eliminate the need for resetting parameters, etc. An object of the present invention is to provide a CT apparatus that can eliminate the troublesome preparation operations.

[Means to solve the problem]

The above object is to provide a CT apparatus configured to be able to perform interrupt processing while executing a specific process among a plurality of processes, and to return to and execute the specific process after the interrupt process is completed. This is achieved by providing a continuation execution means that holds information related to the specific process when the specific process is interrupted, and continues execution from the state at the time of interruption when returning to the specific process.

The information related to the specific process that is retained includes information representing the process state at the time of interruption, such as the position of process execution at the time of interruption, set parameters, and data obtained by execution.

[Effect]

When interrupt processing interrupts a preceding process (specific process), the continuation execution means holds information related to the specific process, and when returning to the specific process, continues execution from the state at the time of interruption.

As a result, it is possible to eliminate wasted processing time when re-executing the subsequent process after the interruption of the previous process, and also to eliminate the troublesome resetting of parameters and re-preparation operations.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the main parts of an embodiment of a CT apparatus according to the present invention, in which numeral 2 is a general-purpose CPU that controls the entire CT apparatus and performs general calculations, and 2 is a general-purpose CPU memory. It is. Reference numeral 3 designates a dedicated CPU that mainly performs reconstruction calculations and image processing calculations, 4 a dedicated CPU memory, 5 a magnetic disk device, 6 a keyboard for operation, and 7 a path line connecting each of the above sections.

In this case, the general-purpose CPU memory 2 includes a control table 2a that stores general system control information of the CT device (operation sequence information of the CT device), and a parameter and data area 2b that stores various parameters and data. ing. Similarly, the memory 4 for the dedicated CPU
It is provided with a control table 4a that stores control information for calculations performed (algorithm information for calculations), and a parameter and data area 4b that stores various parameters, data, and the like. Also, the control tables 2a and 4 of these memories 2 and 4
In a, the save flag is ON, which indicates whether the save information for each process (set parameters and data in progress) is saved in the save area of the magnetic disk device, which will be described later.
, OFF information, a set of interruption pointers indicating the execution position at the time of processing interruption, and reset information.

In addition to an area 5a for storing processing results such as CT images, the magnetic disk device 5 includes an area 5a for storing processing results such as CT images, as well as various information related to the processing (at least parameters set in the processing executed before the interruption). There is a storage area 5b for storing processing result data obtained before the processing is interrupted.

On the keyboard 6 is a process execution key Fl for selectively instructing execution of various processes such as measurement and analysis.

F2. F3. ..., a save key Kl that selects saving of various information related to the process when the process is interrupted, and a return key that instructs to restore the various information stored in the save area 5b of the magnetic disk 5 when the process is interrupted. There are 2.

Here, the general-purpose CPU is capable of processing an interrupt (generally, other priority processing) while executing a specific process among the plurality of processes, and returns to the specific process after the interrupt process is completed. Control a CT device in an executable manner. Furthermore, when the interrupt processing occurs and the specific processing is interrupted, this general-purpose CPU retains various information related to the specific processing in the storage area 5b of the magnetic disk 5, and when returning to the specific processing, the interrupt processing is interrupted. This constitutes the main component of the continuation execution means for continuing execution from the state of .

Next, using FIG. 2 together, the operation of the device of the present invention will be explained. First, the system of the CT apparatus is started.

At this time, the save flag is turned off and the interruption pointer is reset. Next, a desired process execution key, here the process execution key F1, is pressed ONL to start the process such as measurement or analysis (hereinafter referred to as F1 process) assigned to it.

When the Fl process is activated, it waits for input of parameters for the F1 process. When the parameters for the F1 process are input, it is determined whether or not the return key is set to 2 (step 101). If it is not turned on, the execution step moves to the saving process on the right side of the flow in FIG. 2, here the Fl process. (The same applies even if 2 is set to the return key and the save flag is set to OFF (step 102).
. ) F1 processing is Ml, M2 . M3. ... is divided into basic processing units M, and each processing unit M is executed sequentially. In this case, after executing each processing unit M, 1 is set to the save key.
It is determined each time whether it is in the N state. If it is not in the ON state, the next processing unit M is executed as is (steps 105 to 11o).

Here, assume that the need for interrupt processing arises, and 1 is turned on to the save key to execute the processing.

When it is determined that the save key is in the ON state of 1 after the processing unit M is executed, the currently executing process, that is, the F1 process, is stopped (steps 106, 108, 110, ...), and each memory in that state is 4 and 6 above, save information for the Fl process (various information related to the interrupted F↓ process, including parameters set for that process and mid-process result data) is stored on a magnetic disk. It is stored in the storage area 5b in the device 5 (step 111). In addition, the save flag for F1 processing on the control tables 2a and 4a is set to ONL (
In step 112), the execution position of the interruption pointer at the time of interruption is set, and in step 113), the F1 processing is terminated. After the F1 processing is terminated midway, interrupt processing is executed.

The return execution of the F1 process is performed as follows. First, turn on the key F1 to start the F1 process to which you want to return. When the F↓ process is started, the process waits for parameter input for the F1 process, and at this point, turn on the return key to 2. As a result, the execution step moves to 102. At this time, since the save flag is turned ON at the time of the above-mentioned F1 process ending midway (step 112), the execution step shifts to the return process on the left side of the flowchart in FIG. Here, first, the storage information stored in the storage area 5b in the magnetic disk device 5 in step 111 is stored in the CPUI that should originally be stored therein.

3 to memories 2 and 4 (step 103). Next, in step 113, the control table 2a.

Read the position of the interrupt pointer set on 4a,
Processing is executed from the next processing unit M at that position (step (04)).

〔Effect of the invention〕

According to the present invention, when an interrupt process enters and interrupts a preceding specific process, the continuation execution means retains information related to the specific process and causes the process to continue from the state at the time of interruption when returning to the specific process. This has the effect of eliminating wasted processing time from the start to the interruption of the specific process, and eliminates the hassle of re-preparation operations such as resetting parameters.

In particular, even if you interrupt a process that takes a long time or has many parameter settings and complicated initial setting operations, you can return to the state where you left off, saving you the trouble of reprocessing and reoperating. This has the effect of saving time and improving the utilization efficiency of the CT apparatus.

[Brief explanation of drawings]

1 is a block diagram showing a main part of an embodiment of the apparatus of the present invention, and FIG. 2 is a flowchart for explaining the operation of the same apparatus. 1...General-purpose CPU, 2...Memory for general-purpose CPU, 2
a. 4a... Control table, 2b, 4b... Parameter. Data area, 3... Dedicated CPU, 4... Dedicated CP
Memory for U, 5... Magnetic disk device, 5b... Storage area, 6... Keyboard, Fl, F2. F3...
・Processing 2nd

Claims (1)

[Claims] 1. In a CT apparatus that is configured to be able to perform interrupt processing while executing a specific process among a plurality of processes, and to return to and execute the specific process after the interrupt process is completed, the interrupt process is executed and the A CT apparatus characterized by comprising a continuation execution means that holds information related to the specific process when the specific process is interrupted, and causes the specific process to be continued from the state at the time of the interruption when returning to the specific process.