DE2356252A1 - RECORDING DEVICE WORKING IN CONTINUOUS OPERATION - FILM OR CASSETTE CHANGER - FOR HEART OR VESSEL DIAGNOSTICS - Google Patents

Description

3030 DRESDEN, OVERBECKSTRÄSSE 48 - Patent Department -

Dresden, September 18, 1973 TNP / Hpp / Ga.

TuR file 1462

Recording device working in continuous operation - Film or cassette changer - for heart or vascular diagnostics

The invention relates to a continuous flow. Automatic recording device - film or cassette changer - for heart or vascular diagnostics with internal program selector that sets the recording frequency controls his recording device and with one and the same series these at intervals different Ability to process frequency.

The triggering of x-rays at the time of excellent phases of the circulatory system in the heart— and vascular diagnostics is well known and has become proven, as it leads to a reduction in radiation exposure of the patient mainly to a reduction in the consumption of documentation material The correlation between the time of admission and the diagnostically interesting circulatory phase using the cardiac phase switch is effected in a known manner by switching on the recording device (a film or cassette changer ) possibly via a high-pressure injection device and / or an X-ray generator from the cardiac phase switch takes place while the following recordings are made by a device provided in the recording device Program selector triggered.

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It is possible to control the recording device itself - so-called continuous operation - the program selector should also be designed so that it runs the entire program in intervals with a different vUfnahmefrefrequenz divided.

Such recording devices working according to the continuous flow principle have the advantage that higher temporal resolutions can be achieved. On the other hand, it is disadvantageous that only the first recording can be carried out under the control of organ phases.

So it is with the use of recording devices according to the continuous principle and simultaneous use of organ-phase-controlled and intermittent working High-pressure injection devices difficult, the individual recordings and the injections in the best possible way to correlate.

It is also known not just the beginning of the series, but every recording of a series of a cardiac phase switch to trigger (DT-OS 1 963 312 and Boucek H.a. "Intercalative Angiography" Radiology 2§ (1961)

Pp. 565 to 571).

In the case of OS 1 963 312, however, this is the solution another problem, namely the reduction of Motion blur due to X-ray stroboscopy, i.e. due to exposure of one and the same information carrier by means of several X-ray flashes · The organ-phase-controlled triggering of each exposure a series in which, if necessary, the individual recordings in relation to the trigger - size can be placed at different times, (DT-PS 1 015 155), however, has the disadvantage that the Doctor must know the diagnostically interesting circulatory phase with great accuracy. As a result of anatomical, physiological or pathological

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These interesting times fluctuate differently from patient to 1 at ie nt Ui.d with heart rate fluctuations even in the same patient, because the diagnostically interesting areas within the circulatory phase are also very small, requires in addition, the necessary temporal resolution of such an area, a high on taking frequency, the cannot be achieved with a recording device in which every recording is controlled by the heart phase »

The object of the invention is to achieve the necessary number of receptions by eliminating the disadvantages described a series of recordings using the organ phase-controlled Recording technique and the use of a Recording device based on the principle of continuous operation to reduce and / or the information content to increase the sum of the recordings.

In the case of a recording device, this task is described at the beginning described type solved in that aucji the first recording of the following intervals in each case organ-phase-controlled took place "

Using an exemplary embodiment, "the subject matter of the invention will be explained in more detail below with reference to a drawing explained.

£ "ig.1 shows the interaction of the heart phase switch, Recording device, X-ray generator, program selector and control device using one simplified circuit diagram.

Fig.2 shows' the interaction of program selector and control unit to clarify the Interval triggering in the individual operating modes.

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In the accompanying drawing, a recording device 1 with a camera contact 2 and the otartmittel is schematically shown for the pulsed operation, namely the relay R 1 and a contact roller 3 shown. This recording device is a program selector 4- with the Means that a self-controlled continuous operation in four different intervals with a single Allow series, assigned, whereby in the example the subdivision into four intervals, each with the same and / or different frequency is provided. A cardiac phase switch 5 is used with its switching contacts 5/1, 5/2 and 5/3 of the tripping of each one Recording in pulsed operation as well as organ phase-controlled Triggering the various intervals according to the invention.

To explain the mode of action of the Seuterung with regard to influencing the recording device 1 as an X-ray generator 6 is also the same schematically with its input for the exposure release 7 as well as with the switching contact of its exposure contactor 8 shown. The recording device 1 and its program selector 4- is also assigned a control device 9, which switching to one of the three operating modes described below is permitted. The way they work together this control device 9 with the recording device 1 and its program selector 4- on the one hand and with the cardiac phase switch 5 and the X-ray generator 6 on the other hand, it is described below with reference to the explanation of the various operating modes.

1. Operating mode: The program selector-controlled continuous operation with intervals of different recording frequencies and number of recorded images with organ-phase-controlled triggering of the series is described with reference to FIG.

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In this operating mode, the cardiac phase switch 5 controls ^{the start of the recording device 1} with its contact 5/3 (E 1 Ig-S) with the aid of the E 2 for the first interval. The relay R 2 is controlled with a contact 1o / 1 of the operating mode relay. The starting device 13 for uncontrolled recording operation is not actuated. The number of recordings in the first, second and third interval is set with switches 17, 18 and 19. When the recording device 1 is in operation, recording counters 14, 15 and 16 are actuated one after the other according to the intervals. If the contact position of 14/2 and 17/2 is the same, switching to the second recording interval takes place via a contact 1o / 2 and a relay R.3. At the same time, the intake counter 15 is ready to count for the second interval. This process continues in the following intervals via contacts 1o / 3 and relay R 4 or via a switch 1o / 4 and a relay R 5

2. Operating mode : organ-phase-controlled triggering of each exposure.

In this operating mode, the self-control of the i.ufme ge advises it 1 must be switched off with its program selector 4. This is done by opening contacts 1o / 1, 1o / 2, 1o / 3 and 1o / 4 (in Fig. 2) as well as by actuating the contacts 1o / 5 and 1o / 6 in Fig. L. When switching In this operating mode, contacts 11/1, 11/2, 11/3 and 11/4 are pulled out in their rest position ( - The cardiac phase switch now triggers the recording device directly. While in the first operating mode the X-ray generator 6 by the recording device 1 via the exposure release 7 is controlled, takes place in the aei-th operating mode the triggering of the X-ray recording would take place directly from the heart phase switch 5 via the contacts 5/2, 12/3, 11/1, 11/2 and 1o / 5. The start of the recording device

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is done via contacts 12/1, 1o / 6, 11/4, 5/1 and 11/3. Contacts 12/1 ... 3 are only available when the unit is ready to receive Recording device closed, but open during the time of the film transport. So it will be Recording device via the relay R 1 and the contact roller 3 triggered.

3 »Operating mode: continuous operation in intervals and organ-phase-controlled triggering of the first recording of each interval.

In this operating mode, contacts I0 / I..0 I0 / 6 and contacts 11/1 ... 11/4 are actuated and brought into the position shown in dashed lines. The recording device 1 is started via contacts 11/4, 5/1, 11/3, 12/2 and a relay R I3. The relay R 13 controls with its normally open contact s 13 the relay R 2 (Fig. 2), which triggers the recording device with the recording frequency of the first interval. After processing the set number of exposures for the first interval in accordance with the 1st operating mode, switching to the second interval does not take place immediately, but via contact s 13/2 only after relay R 13 has responded, which in turn, as in the 1st interval , is triggered by the heart phase switch 5. The rest of the process is analogous to the first interval. The circuit for triggering the X-ray generator 6 ensures that the first recording of the individual intervals is triggered in a heart phase-controlled manner, while the subsequent recordings of the intervals are controlled by the recording device 1 or its program selector 4. This is done by a changeover contact 14 of a relay R s 14. In front of the beginning of the series of recordings, the con- sumption meters 14.15 _f 16 in its zero position and the

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Switch 2ο is closed. This is about the resetting of the pickup rs 14- / 1 a relay Rio controlled that with his -Ä-work contact s 1o that Relay R 14 activated. This relay R 14 separates the Camera contact of the recording device from the triggering of the recording 7 of the X-ray generator 6 and switches the heart phase switch 5 to. Triggering the first X-ray exposure is carried out using switch '5 / 2,11 / 1, s 14, 11/2 and 1o / 5 <> herphased «Simultaneously the recording device 1 is started and the recording counter 14 switches on. This causes the relay R 14 de-energized and contact s 14 switches off the cardiac phase switch and camera contact 2 switches on Has the first interval been processed, i.e. are the Contact positions of 14/1 and 17/1 are the same, so the relay R 11 is about the zero position of the recording counter 15/1 triggered j which in turn triggers R 14, which the camera contact 2 from the X-ray generator 6 separates and the contact 5/2 of the heart phase switch 5 to the. X-ray generator 6 switches. In order to this ensures that the first recording of the following interval is triggered again by heart phase control will.

TJm to avoid double exposures, e.g. due to different Response times from Röntgengeneratore.n and recording device 1 can occur, a contact of a recording protection 8 of the X-ray generator 6 is provided, which, when the X-ray generator is triggered, forces the recording device to move · 'During the film transport in the recorder is controlled by the switch 12 prevents triggering of an X-ray exposure by the cardiac phase switch. This circuit works in all operating modes,

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Claims (1)

DRESDEN, OVERBECKSTRASS E 48 - Patent Department - Dresden, 1b.9.73 TKP / Hpp / Ga. Claim Continuous operation recording device film or cassette changer - for cardiac and vascular diagnostics with internal program selector, which controls the recording frequency of the recording device and is able to process this in the same series at intervals of different frequencies, the series starting with organ phase control, characterized in that the first recording of the intervals following the first interval is also controlled by organ phases « For this: 2 sheets of drawings 509818/0240 Blank page