JPH02200246A - Organ data collector - Google Patents

Abstract

PURPOSE:To accurately collect data for each phase for each phase regardless of the fluctuation of a period by collecting the data at the equal time intervals during a specified period out of a gate interval and executing the data collection of equal division during the remained period. CONSTITUTION:A scintillation camera 2 is directed to a person 1 to be checked and position information, which are obtained each time radiation ray is made incident from the camera, are stored through a data collection controller 3 to a storage device 4. On the other hand, an electrocardiograph 5 is set to the person to be checked and an electrocardiogram is detected. Then, the waveform of an electrocardiographic signal is caught and a date signal generator 6 generates a date signal and sends the signal to the data collection controller. Hereafter, the data are stored from the camera to the storage device for each fixed time block. A data processor 7 sends the respective time division data from the storage device to an adder 8 as they are during shrinked period and corrects the time division data during an extended period. Then, since the fluctuation of the period is corrected over all the extended period, it can be avoided that the influence of the period fluctuation is made local. Then, the accurate data can be obtained.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a biological data collection device for collecting data on a biological body for each phase of its movement cycle.

[Conventional technology]

2. Description of the Related Art Conventionally, when image data of a heart is collected using, for example, a scintillation camera or an MRI apparatus, image data is collected for each phase of the periodic motion of the heart. In this case, the cardiac motion cycle is measured using an electrocardiograph, a gate signal is created according to the waveform (for example, R wave) that occurs at a predetermined phase, and the gate signal is generated at regular intervals after the gate signal is generated. Collect data separately (e.g., cardiac loop analysis). Furthermore, since this method cannot collect data of the same phase if the period is not constant, a reverse gate method has also been devised in which data is collected at regular intervals before the gate signal.

[Problem to be solved by the invention]

However, in these conventional cases, data is collected at fixed time intervals after or before the gate signal, so when the period fluctuates, the phase relationship may not match for time segments far from the gate signal. First, there is a problem that accurate analysis cannot be performed using this method. On the other hand, in the case of mild cardiac pump failure, the period of one cycle (
Although the gate interval) becomes indeterminate, especially in the case of elderly people, the systole is constant during one cycle and only the diastole is indeterminate. The present invention is a biological data acquisition device that is particularly effective in analyzing the reserve capacity of pump movement in such cases of mild pump failure of the heart, and that enables highly accurate data collection for each phase regardless of cycle fluctuations. The purpose is to provide

[Means to solve the problem]

In order to achieve the above object, the biological data collection device according to the present invention includes a means for collecting data for each predetermined time period after a gate signal generated at a specific phase of a detected biological periodic signal and storing the data at each gate interval; The data for each gate interval that has been added is added for each corresponding time segment for the data for the time segment that falls within a specific period of the gate interval, and the time segment is changed for the data for the time segment that falls within the remaining period. means for adding data for each corresponding time segment as data having the same number of segments.

[For production]

Data collection is performed at equal time intervals during a specific period of the gate interval, and data collection is performed in equal time intervals during the remaining period. Therefore, if the period fluctuates, the fluctuation will be averaged out over the period in which the data is collected evenly, avoiding the inconvenience of localized period fluctuations and increasing the accuracy of the collected data. . Particularly when analyzing the reserve capacity of the heart's pumping function, accurate analysis can be achieved by collecting data at equal time intervals during the period corresponding to the systolic phase, and collecting equally divided data during the period corresponding to the diastolic phase. becomes possible. This is because, in the case of mild cardiac pump failure, the systole is constant and the diastole is irregular.

【Example】

Next, an embodiment of the present invention will be described with reference to the drawings. This example shows cardiac RI (radioisotope)
This invention is applied to the case where an image is obtained for each phase. In FIG. 1, a scintillation camera 2 is directed toward a subject 1, and radiation from RI administered into the body and accumulated in the heart is captured by this scintillation camera 2. Radiation incidence position information obtained from this scintillation camera 2 for each radiation incidence is stored in a storage device 4 via a data collection control device 3. On the other hand, an electrocardiograph 5 is set on the subject 1, and an electrocardiogram is being detected. The waveform of the electrocardiographic signal obtained here is as shown in Fig. 2, and for example, its R
The gate signal generator 6 generates a gate signal by capturing the wave, and sends it to the data collection control device 3 described above. When the gate signal corresponding to this R wave is input, the data collection control device 3 stores the data from the scintillation camera 2 in the storage device 4 at regular time intervals. As a result, as shown in FIG. 2, in a certain period (A period), one piece of time-shared data Al, A2, . period), then the time-shared data Bl
, B2, . . . , Bk will be stored. When the period (gate interval or R-wave interval) fluctuates, it becomes j-41 (. By the way, in mild cardiac pump failure, if the time of one cycle, that is, the time from R wave to R wave, fluctuates, As shown in FIG. 3, the systole is constant and only the diastole varies. Therefore, the data processing device 7 processes the above-mentioned time-sharing data read from the storage device 4 for a period corresponding to the systole. Then, it is directly sent to the adding device 8. Therefore, in the systole, as shown in FIG. 4, the time-shared data of the A cycle and the time-shared data of the B cycle are added for each corresponding time segment (that is, AI + B1 . A2+B2... is performed),
On the other hand, for the diastolic phase, the other time-sharing data is corrected in accordance with the number of divisions of the A cycle or B cycle. For example, when adjusting to cycle B, as shown in FIG. Obtain divided time-sharing data. Addition of these and the time-shared data of period B is performed by addition bag W8. Then, the time-sharing data after the addition is stored in the storage device 4 again. Since the cycle fluctuations are corrected throughout the diastole in this way, it is possible to avoid localized fluctuations in the cycle fluctuations, and to achieve an accuracy suitable for analyzing the reserve capacity of the heart's pumping function as described above. Good data can be obtained. Note that in the above, data is collected at equal time intervals during the systolic phase of the heart, and data is collected equally divided during the diastolic phase, which means that the final phase of collection is the boundary, but the boundary may be moved to another point in time. It is possible. For example, it is possible to set the second heart sound as a boundary, to set the period before that as a period for collecting data at equal time intervals, and to set the period after that as a period for collecting data in equal time intervals. It is also possible to provide a circuit that determines whether data should be stored or discarded for each heartbeat, so that if the gate interval is extremely short or long, it is considered an arrhythmia and the data is not stored. . Further, although the above description has been made regarding data collection regarding R1 images of the heart, the present invention can also be applied to the collection of image data (such as RI images and MRI images) that are affected by other periodic movements such as respiratory movements.

【Effect of the invention】

According to the biological data collection device of the present invention, when collecting data on a living body for each phase of its movement cycle, it is possible to collect data for each phase with high accuracy regardless of fluctuations in the cycle. . Therefore, it is particularly useful in the field of nuclear medicine for early diagnosis of heart pump failure and for cardiac diagnosis of children with irregular heartbeats.

[Brief explanation of the drawing]

1st I2! 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a time chart showing the relationship between an electrocardiogram signal and corresponding time-division data, and FIG. A time chart showing the relationship, FIG. 4, is a schematic diagram for explaining addition of time-division data. 1... Subject, 2... Scintillation camera, 3
...Data collection control device, 4...Storage device, 5...
- Electrocardiograph, 6... Gate signal generator, 7... Data processing device, 8... Addition device.

Claims (1)

[Claims] (1) A means for collecting data for each fixed time interval after a gate signal generated at a specific phase of a detected biological cycle signal and storing the data for each gate interval, and a means for collecting data for each gate interval and specifying the data for each gate interval. Data for time segments that fall within the period are added for each corresponding time segment, and data for time segments that fall within the remaining period are added for each corresponding time segment as data with the same number of segments after changing the time segment. A biometric data collection device comprising: means.