X-Ray diagnostic arrangements with several radiological exposure systems

An X-ray diagnostic arrangement in which a plurality of radiological exposure systems and a common power supply and control panel are provided. The control panel has a control unit for the exposure systems. A selector unit has switching elements for organ programmed setting of exposure values for each exposure system. A manually operated switching unit connects any one of the exposure systems to the power supply and the control unit. Each selectable position of the selector unit corresponds to several exposure value combinations, and a program selector with switching positions is connected to all selectable positions so that one exposure value combination can be selected for each selectable position in each switching position of the program selector. The switching unit for connecting one of the exposure systems to the power supply and the control unit is actuated jointly with the program selector.

BACKGROUND OF THE INVENTION 
The present invention relates to an X-ray diagnostic installation with 
several radiological exposure systems, a power supply and a common control 
panel which has a control device for the exposure systems, and a selector 
device with switching means for the organ-programmed setting of exposure 
values for each exposure system. A manually operated switch arrangement 
connects either one of the exposure systems to the supply and control 
device. 
With a known X-ray diagnostic installation of this type, the control panel 
has 36 organ keys for 36 exposure types which can be made with the several 
operational locations. Because of the large number of keys for selecting 
the exposure values, the conventionally known control panel is extremely 
cumbersome to operate. 
It is, therefore, an object of the present invention to provide an X-ray 
diagnostic arrangement of the initially described type, in which the 
selector device for the organ-programmed setting of exposure values has 
considerably fewer switching means than the conventionally known control 
panel. 
Another object of the present invention is to provide an X-ray diagnostic 
arrangement of the foregoing character which may be economically 
fabricated and maintained in service. 
A further object of the present invention is to provide an X-ray diagnostic 
arrangement, as described, which has a substantially long operating life. 
SUMMARY OF THE INVENTION 
The objects of the present invention are achieved by providing that for 
each selective position of the selector device, several exposure value 
combinations are assigned. A program selector, common to all selective 
positions, can select an exposure value combination for each of its switch 
positions. The principal difference between the state of the art and the 
X-ray diagnostic installation in accordance with the present invention is 
as follows: In each selective position, e.g. by each organ key, several 
exposure value combinations can be selected and there is provided means by 
which the desired exposure value combination can be selected. With the 
control panel of the X-ray diagnostic installation in accordance with the 
present invention, a number of selecting positions for the organ 
programmed setting of exposure values is required, which otherwise would 
be necessary for a single exposure system. In contrast, the total number 
of organ keys with the known control panel equals the sum of organ keys 
required for the individual exposure systems. 
A particularly advantageous embodiment of the present invention is the 
location, at the control panel near the selector device for the 
organ-programmed setting of exposure values, of display panels or charts 
which can be spread open like a book. On these panels, the body parts 
associated with the selective positions are drawn in such a way that when 
flipping the display panels or filp charts, the body parts associated with 
a select position of the selector device are all in a column near the 
select position. When flipping to the display panels associated with the 
selected exposure system, there is an automatic display of the body parts 
associated with the various select positions of the organ selector device. 
In accordance with another embodiment, the program selector may be in 
operative connection with the display panels or flip charts, so that when 
flipping the respective display panels, the associated exposure values 
program of the selector device is selected automatically. Thus, the 
operator with this embodiment, by flipping to the correct chart, selects 
the exposure values program for the organ selector device. 
The novel features which are considered as characteristic for the invention 
are set forth in particular in the appended claims. The invention itself, 
however, both as to its construction and its method of operation, together 
with additional objects and advantages thereof, will be best understood 
from the following description of specific embodiments when read in 
connection with the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
FIG. 1 shows two exposure systems for X-ray pictures, one of which systems 
comprises an X-ray tube 1 and an X-ray film magazine 2 which is fastened 
to a wall stand. The patient 3 is pictured by the X-ray radiation of X-ray 
tube 1 on the X-ray filmin magazine 2. The X-ray tube 1 has two focusses 
and two filaments, one of which can be selected. 
The second exposure system comprises an X-ray tube 4 and a film camera 5 
which is coupled to the output screen of a X-ray picture amplifier 6. The 
patient 7 is lying on a table 8. X-ray tube 4 also has two focusses. The 
exposure systems 1, 2 and 4 through 6 are connected to a common supply and 
control device 9 which comprises a high-voltage generator and means for 
making the exposure settings, such as X-ray high voltage and mAs product 
or sensitivity of an exposure automatic system. For selecting the exposure 
values, there is a common control panel 10 which has organ keys 11 through 
17. To each one of organ keys 11 through 17, which constitute the 
switching means for a selector device, several exposure value combinations 
are assigned; in the embodiment described here, there are two exposure 
value combinations associated with the two exposure systems 1, 2 and 4 
through 6. 
Adjacent to organ keys 11 through 17 there are display panels 18 which will 
be described below in conjunction with FIGS. 4 and 5. The display panels 
18 spread like a book about an axis 19 and bear the designations of the 
human body parts associated with organ keys 11 through 17. For the sake of 
brevity, these body parts are not shown in FIG. 1. They are displayed in 
the seven columns indicated so that, when the display panels 18 are spread 
open, the associated organs are displayed. The selection of the exposure 
combinations obtainable by the organ keys 11 through 17 is accomplished by 
a switch which is actuated by the display panels 18. When spread open to 
the desired display panel, each of the organ keys 11 through 17 is 
assigned the associated exposure value combination and the associated 
exposure system is connected to the supply and control device 9. This will 
be explained in detail by means of FIG. 2. 
FIG. 2 shows a program control device 20 to which the contacts of organ 
keys 11 through 17 are connected. FIG. 2 shows only the contacts 21 and 22 
of organ key 11 and the contacts 23 and 24 of organ key 17. To the program 
control device 20, there is connected a program selector 25 which is reset 
when the display panels 18 are changed from one position to another 
position, between the fixed contacts 26 and 27. Pilot lamps 28 and 29 in 
control panel 10 indicate which program has been selected. Depending on 
the position of program selector 25, the contacts 21 and 23 of organ keys 
11 and 17 and the corresponding contacts of organ keys 12 through 16 or 
the contacts 22 and 24 and the associated other contacts are connected to 
the program control device 20. Hence, when pressing one of keys 11 through 
17, in accordance with the position of the program selector 25, each key 
selects one of two possible exposure value combinations. 
To program control device 20 there are connected lamps 70 and 71 which 
indicate which exposure system has been selected by spreading open the 
display panels. Three lamps 30 through 32 indicate the required amplifier 
foil in the exposure magazine 2. The focus selected is indicated by two 
lamps 33 and 34. 
The exposure values selected in the program control device 20 by pressing 
an organ key act on correcting or control elements 35 for a high-voltage 
generator 36 to set the exposure values. The high-voltage generator 36 
feeds to the selected exposure system either the X-ray tube 1 or the X-ray 
tube 4. Switches 37 and 38 are used for selecting the desired exposure 
system. 
The example of FIGS. 1 and 2 shows that fourteen different exposure value 
combinations can be selected by seven organ keys. If the program selector 
25 is expanded and additional contacts are assigned to organ keys 11 
through 17, an additional expansion is possible. Hence, with the X-ray 
diagnostic installation described, a large number of exposure value 
combinations can be selected with relatively few organ keys. The display 
of the body parts associated with the individual keys by means of display 
panels 18, proceeds in a particularly simple and expedient manner. 
If a free exposure value setting is desired, a key 39 on control panel 10 
is actuated. The key 39 closes a contact 40 and connects an mAs selector 
62 and a kV selector 64 to the control elements 35. The contact 41 which 
also is actuated by key 39 cancels the setting for the mAs product and for 
the X-ray tube voltage through organ keys 11 through 17. Lamps 42a and 43a 
indicate whether a free or programmed setting of all exposure values takes 
place. The lamps 28 through 34 and 42a, 43a are located in control panel 
10, but are not shown in FIG. 1 for the sake of brevity and clarity. 
Below, the setting for the exposure values by means of organ keys 11 
through 17 is explained in detail by means of FIG. 3. FIG. 3 shows a 
contact 21 of organ key 11. If this contact is closed, a relay 42 with 
contacts 43 through 49 is energized. The broken line indicates that these 
contacts are actuated by the winding of relay 42. FIG. 3 shows the X-ray 
tube 1. The two filaments are denoted by 50 and 51. They can be connected 
via contact 46 and a contact 52 to a filament voltage transformer 53. The 
anode voltage for the X-ray tube 1 is generated by a high-voltage 
rectifier 54 which is located at the output of a high-voltage transformer 
55. A variable ratio transformer 56 is connected ahead of the high-voltage 
transformer 55. 
If organ key 11 is pressed, the contacts 43 through 49 of relay 42 are 
closed as the result of it being energized. The contacts 43 and 44 connect 
the X-ray tube 1 to the output of high-voltage generator 36. Hence they 
correspond to the switch 37 of FIG. 2. The contact 45 selects the 
resistance in the filament circuit which determines the filament current 
and hence the X-ray tube current. The contact 46 selects the focus 
associated with filament 50. Assume that with pressing the organ key 11, 
lamps 28, 30 and 33 are turned on. This turning-on is accomplished via 
contacts 47 through 49. The contact 57 selects the high voltage assigned 
to key 11 and its contacts 21. 
Hence, pressing the organ key automatically selects the X-ray tube voltage, 
the X-ray tube current and the focus, and turns on the associated pilot 
lamps. In the same manner, the other contacts of organ key 11 energize 
additional relays which select these magnitudes in accordance with another 
program. In an analog fashion, relay windings are associated with the 
contacts of the other organ keys. A known X-ray exposure automatic shutoff 
system terminates the X-ray exposures. 
If the exposure data are to be set freely, switch 40 is closed and relay 58 
is energized. This relay opens its contacts 59 and disconnects relay 42. 
It also closes its contact 60 and energizes a mAs relay 61. By means of 
slide 62, the mAs relay 61 can be set which, in the conventional manner, 
upon reaching a predetermined mAs product, opens switches 63 in the 
primary circuit of the high-voltage transformer and terminates the 
exposure. The kV selector 64 acts in a manner already known in the art on 
the variable ratio transformer 56 to adjust the high voltage on X-ray tube 
1. 
FIG. 3 indicates that relay 42 with its contacts 43 through 49 and 57 is 
part of program control device 20. The latter also contains the other 
relays associated with organ keys 11 through 17. 
The kV selector 64 is switched on by a contact 65 of relay 58 upon it being 
energized. With switch 40 opened, contacts 63 are actuated by said 
exposure automatic shutoff system. 
FIG. 4 shows the details of control panel 10. The program selector 25 is 
actuated, as previously stated, by turning over the display panels. 
It is an integral element and feature of the X-ray diagnostic installation 
that to each of organ keys 11 through 17 several exposure value 
combinations are assigned and that, via the program selector 25 in each of 
its switching positions, one exposure value combination can be selected 
for each organ key 11 through 17. Hence, with more than two exposure 
systems, there must be more than two contacts for each organ key 11 
through 17. These contacts are selected by the program selector 25. 
The display panels 18 have a position showing the body parts assigned to 
the exposure system 1, 2. Above each of organ keys 11 through 17, the 
associated body parts are shown in a column. Easy location of the body 
parts is facilitated by the drawing of a human body at the edge of the 
left-hand display panel. With each of organ keys 11 through 17, the X-ray 
tube voltage, the foil or film to be used, the focus selected, and the 
selected dominant are shown. For free operation, key 39 is pressed. The 
mAs product and the X-ray tube voltage can be set by selector 62 and 64. 
With exposure automatic operation, when key 39 is not pressed, an 
adaptation to the condition of the patient is possible via keys 52a. Pilot 
lamps 28 through 34, 42a, 43a, 70 and 71 are shown to the left of the 
control panel. 
FIG. 5 shows the position of display panels 18 applicable to exposure 
systems 4 through 6. A setting for mAs product is not possible and the mAs 
selector 50 is covered by a projection 53a on one display panel. Only the 
X-ray tube voltage can be adjusted when pushbutton 39 is pushed. Again, 
the associated body parts are shown in a column above each of organ keys 
11 through 17. A display 74 indicates if the machine is operating properly 
or not while the X-rays are being taken. This display is furnished by a 
two-plane seriography (serial radiography) installation. The individual 
parts of the installation can be illuminated to indicate any possible 
problems. 
Actuation of switches 37 and 38 for connecting either of X-ray tubes 1 and 
4 to the high-voltage generator 36, may also take place jointly with the 
actuation of the program selector 25 by flipping over the display charts 
or panels 18. 
Without further analysis, the foregoing will so fully reveal the gist of 
the present invention that others can, by applying current knowledge, 
readily adapt it for various applications without omitting features that, 
from the standpoint of prior art, fairly constitute essential 
characteristics of the generic or specific aspects of this invention, and 
therefore, such adaptations should and are intended to be comprehended 
within the meaning and range of equivalence of the following claims.