This
function opens the window to modify the entire APR data set. Data marked with a
[P] can only be changed in this window via service PC or with the APRMANager.
All other non-marked data can also be changed at the desk and saved thereafter
via the button combination RESET
(hold it) + the highlighted APR,
but: see ‘APR modifiable by User’.('Change
APR Data Set' is not possible
with the default Test APR.)
If only a few APR data sets have to be maintained one can use these functions.
If more APR data sets shall be modified the use of APRMAN.EXE (part of the installation disk) is much easier, more convenient and a lot faster.
[P] APR number: is just a (randomly given) pointer (house number)
This number can be used to copy a data set
into another data set. To do so the destination APR number ('Select APR Data Set') has to be filled
in the 'APR number' field,
afterwards transmit with <F2>.
The source data set does not change.
To move an APR data set copy a data set to the desired destination and delete
the source APR data set afterwards with ‘APR
deassign'.
There
has to be an active destination APR. Error 00BR will come up if a data set is
loaded/ copied to an APR number which is not assigned to any RGDV.
If APR backups are reloaded the APR numbers of the backup file will be the same
after reloading except
- if the APR numbers are already
occupied
- if a default data set from the
installation disk is used
- if an individual RGDV backup file
will be loaded to another RGDV of the same generator.
'APR number's should
not be changed if the generator is in combination with a BuckyTH or TH2 system
via CAN.
Otherwise the assignment of APR#s for the control handle
will be lost.
[P] APR name: 16 characters are possible
If special letters are needed (language dependent) see doc INSTALLATION character codes.
Since Bucky controller release 5.x for BuckyTH2 an
"=" character must be at
the end of the APR name string to get a ready display for grid used RGDV / APR.
APR
for RGDVs 1+2+3 with Inalfa trays
must always have the "=".
APR for ACL4 trays with removable
grid must have the "=" when the grid shall be used
and no "=" when the grid shall not be used (removed from the tray to get a system ready) for
application reasons.
Digital Diagnost systems also require the "=" character for a system
ready when the grid shall be used and no "=" without grid.
If
APR data are changed at the desk the two last digits of the 16 character field
will be used to indicate '_*'
= 'overriding'.
Example: [infant
10-15 yrs] will change to [infant
10-15 y_*] after overriding.
Focus: small = small filament of the tube
middle = (in case of a 3 focal spot tube, not yet available)
large = large filament of the tube
vario = is a virtual
focal spot, its size (tube type dependent) in-between large and small focus can
be selected via the 'Vario focus ratio',
only with RO17/50, SRO09/51, SRO25/50, SRO33/100 tubes with superimposed
focal spots and if option is present
[P]
Vario focus ratio:
range: 20%, 35%, 50% (default) , 65%, 80% of small focus
Sets the ratio of small and large
focus, for tubes with superimposed focal spots.
If possible indicate the ratio in the 'APR
name' field.
Example: 'Thorax_ap____50%'
To get the best application exposure parameters use APRMANager, it takes the
tube current limits into account and calculates the optimum.
([P]) Dose measurement field (left): on / off
Dose measurement field (middle): on / off
Dose measurement field (right): on / off
At least one of the measuring fields
must be 'on' to have access to AEC, AECF or TDC no matter if the 'Preferred technique' is set to
Automatic' or 'Non automatic'.
A chamber must be programmed at 'RGDVx
Data Set A' + 'Dose measurement input'.
The default APR data set [### APR name
###] has all 3 fields 'on'.
Some customers like ho have technique
APR's only. If so switch 'off'
all fields for the non-AEC techniques so that there is no way to change to AEC
technique if AEC is possible at the same RGDV / menu / page.
If a Mobile Cassette Stand MCS is used at RGDV4 together with free cassette of
a BuckyTH, TH2 system the APR/menu structure should offer free cassette APR
with all fields off and
MCS APR with the required field(s) on.
[P] Preferred technique:
One of the three 'No AEC technique’s will
be displayed at the major exposure data display.
With the mA-s labeled button at the
desk one can switch over from kV-mA-ms
(LED on) to either kV-mAs or kV-mAs-ms technique (LED off),
depending on what has been programmed.
If a 'Dose measurement input' and/or ‘Dose measurement sensor type’ is
programmed at 'RGDVx Data Set A' and
at least one 'dose measurement field' is
'on' one can switch over to AEC
technique, which will cause the overriding sign ' _*' coming up.
AEC / AECF / TDC technique will appear when this APR is selected (AEC technique button LED and 1...3 measuring field LED's on).
Most of the predefined APR data sets from the installation
disk are programmed for a 400 speed system (Recommended Dose: 2.5 µGy). If these are taken all organ dependent mAs values have to
be adapted to the local film speed systems (doubled for 200 speed systems,
divided by 2 for 800 speed systems).
[P] AEC technique:
AEC falling
load kV the
kV dependent mA start value of the falling load exposure will appear in the 'Exposure data I [mA]' field
AEC fixed
current kV-mA the fixed mA value has to programmed
in the
'Exposure data I [mA]' field, mA and exposure time values have to match the required organ dependent
mAs
Select kV-mA-ms (RUIT) at 'No AEC technique'
TDC (Tomo
Density Control) (option
9890 000 0223x, see STAMMKARTE)
the TDC start mA value has to be
programmed in the 'Exposure data I [mA]' field
or
the desired mAs value in the 'Exposure
data Q [mAs]:' field in combination
with the tomo sweep time = 'Exposure data
t [ms]:'
Select ‘kV-mA-ms (RUIT)’ or ‘kV-mAs-ms
(RUQT)’ at 'No AEC technique'
[P] No AEC technique: =
all non-Amplimat techniques
Two out of the
three 'No AEC technique's are available
for every APR.
If either kV-mAs or kV-mAs-ms
technique is selected one can switch over to kV-mA-ms technique pushing the "mA-s" labeled button at the desk.
If kV-mA-ms (LED on) is programmed
as preferred non-AEC technique and if it will be deselected by pushing the
"mA-s" labeled button (LED
off) it changes to kV-mAs technique
only.
The preferred 'No AEC technique'
after AEC-deselect can be changed at the control desk with the overriding-save
function.
If kV-mAs-ms technique
is programmed as preferred non-AEC technique it will change to kV-mAs if the APR data set has been
modified at the control desk and has been saved with kV-mA-ms technique selected (only at non-tomo RGDV) |
kV-mA-ms
technique (RUIT) (Radiographic kV-mA-s), choice of kV, mA and ms parameters
Must
be selected in case of 'AEC fixed current kV-mA' as preferred
AEC technique and can be selected for 'TDC
(Tomo Density Control)' techniques.
kV-mAs
technique (RUQ) Radiographic kV-mAs, choice of kV and
mAs parameters
kV-mAs-ms
technique (RUQT) Radiographic
kV-mAs-s, choice of kV, mAs and ms parameters
Should be selected as the best non-AEC
technique for TDC technique APR.
This technique is very helpful at simple
tomography stands (e.g. replacement, no chamber for TDC). Exposure time and mAs
can be selected individually depending on the tomo sweep time and the organ
& patient size, but:
Time +/- selection is not possible if RGDV is programmed 'Used for tomo = yes' at 'RGDVx
Data Set B'. It must be programmed in the APR or the time selection is
controlled by automatic input of tomo times (decade WAX21 or Bucky controller).
Depending on which of the three non-AEC techniques is
selected only the relevant parameters in the following 'Exposure data nn [xx]'
have to be modified. All other parameters will be calculated by the
generator itself after transmission with <F2>. If the same APR data set
screen will be called again, the calculated "slave values" appear.
Most of the predefined APR data sets from the installation
disk are programmed for a 400 speed system (Recommended Dose: 2.5 µGy). If
these are taken all organ dependent mAs values have to be adapted to the
local film speed systems (doubled for 200 speed systems, divided by 2 for 800
speed systems). |
[P] Tube current
max. factor [%]
range = 1...100% (default 100 %)
The max emission current can be
modified within the above range.
The reduced current (see 'Exposure data I
[mA]') will be the start mA value of an AEC falling load exposure. It can
also be the max mA value e.g. for an AEC fixed current exposure. It will be a
constant value during the exposure until it comes to a point where the mA have
to be reduced (falling load) within 4000ms. The mA value as the result of the %
reduction is different for each kV value.
The mA value can be seen if the APR
data set screen has been transmitted with <F2> once. Call the same ‘Change APR’ data set again and the
calculated mA value appears.
Another way to see the mA is at the desk: Push the APR button, switch off AEC.
The background technique will come up. In case of kV-mAs or kV-mAs-s push the
"mA-s" labeled button to switch over to kV-mA-ms technique. The
displayed mA is the value which is one step below the max value in the row of
the programmed mA steps (see 'RGDVx Data
Set B'). Now push the +mA button to get the max mA value. This is identical
to the data set displayed on the PC screen.
If an APR with small focus will be changed by pushing the large focus button
the +mA has to be pushed until the max value appears. A change from large to
small will immediately display the max mA.
The modification of the max factor will lead error 00L$ if
the resulting mAs value is below 0.5 mAs.Take care that there are not too
many additional reductions programmed
|
[P] PSC U thin (dose
equivalent steps): range
= 0...-5 dose equiv. kV steps
Patients Size Correction kV slim
patient
[P] PSC U thick (dose
equivalent steps): range
= 0...+5 dose equiv. kV steps
Patients Size Correction kV thick
patient
[P] PSC Q thin (6%
steps): range
= 0...-10 mAs steps see Steps
Patients Size Correction mAs slim
patient
[P] PSC Q thick (6%
steps): range
= 0...+10 mAs steps see Steps
Patients Size Correction mAs
thick patient
[P] PSC density thin
(6% steps): range
= 0...-10 dens. steps see Steps
Patients Size Correction density
correction slim patient, max limit possible = - 8 steps
[P] PSC density thick
(6% steps): range
= 0...+10 dens. steps see Steps
Patients Size Correction density
correction thick patient, max limit possible = + 8 steps
Exposure data U [kV]: range = 40...150
kV or what has been programmed at 'Tube
limits'
If
full kV range is not available, check ‘Tube
limit’ settings.
Exposure data I [mA]: range = 0.1...2000
mA
Depending on
the generator version, tube type, focal spot, selected technique and all reduction
factors: This value can be a master or slave value.
The result of a [mA]*[ms]
multiplication must always be >= 0.5 mAs, otherwise error 00L$ appears.
If full mA range is not
available, check ‘Tube limit’
settings or all other reduction tables.
Exposure data Q [mAs]: range
= 0.5...1000 mAs (generally limited at 850 mAs)
Depending on the tube
type, focal spot, selected technique and all reduction factors:
This value can be a master or slave value.
If
full mAs range is not available, check ‘Tube
limit’ settings or all other reduction tables.
Exposure data t [ms]: range =
1...16000 ms
Depending on
the tube type, focal spot, selected technique and all reduction factors:
This value can be a master or slave value.
The result of
a [mA]*[ms] multiplication must always be >= 0.5 mAs, otherwise error 00L$ appears.
If full range
is not available, check ‘Tube limit’
settings or all other reduction tables.
Exposure data density (6% steps): range = -8...+8 density steps
at 6%
Depending
on which step rate has been programmed at 'RGDV
Data Set B',
explanation see steps
*** If APR with AEC are associated to a
certain Film-Screen-Combination the basic density value of the FSC appears as a
zero. This zero - value is the base density value which has been adjusted to
the customers taste.
There
are organs which work fine with the basic zero
density, but others require e.g. a zero-2 or
zero+3 correction.
SCP and MedioCP are based on 12% steps for every +/-1 correction,
so should the Optimus be programmed at 'RGDVx
Data Set B'. For every +/-1 12% step two +/-6% steps have to be programmed.
Offers all available FSC names programmed
to the 'Data Set's of a chamber
assigned to the RGDV of the selected APR.
def 1 = default, no
FSC programmed yet.
Since Release 3 predefined APR data
sets can be programmed with the FSC name = ‘Abbreviation’.
If the ‘Abbreviation’ string and the
name in the APR data set is identical, the FSC will be associated to the APR
data set.
If no name is given in the
default APR data set the Recommended
Dose µGy value of the individual
APR data set will determine the assignment of the APR to the FSC Data Set which
has the closest ‘Dose of FSC [µGy/V]’
value.
The Recommended Dose µGy value cannot
be seen in this screen via AGent2 It is only
possible with the APRMANager. |
*** Most of the predefined APR data sets from
the installation disk are programmed for a 400 speed system (Recommended Dose:
2.5 µGy). If these are taken all organ
dependent mAs values have to be adapted to the local film speed systems (doubled
for 200 speed systems, divided by 2 for 800 speed systems).
1 = default
1...8 = via ‘Release circuit
adaptation unit’ 1WA or 2WA
1...16 = ‘Bucky Ctrl. 1/Dig. Diag.’ Bucky TH /
TH2 and Digital Diagnost via CAN
Option Automatic Input of Tomo Times 9890 000 0222x (see STAMMKARTE) must
be present. If no tomo unit is present:
ignore.
Decade
systems:
Active if programmed at 'RGDVx Data Set A + B', 'RGDV Interface Assignments' and 'Tomo Time' for the programmed 'Release circuit adaptation unit'. Then
8 tomo numbers are available for non-CAN systems.
*** If tomo APRT's are programmed using option
Automatic input of tomo times:
Select every APRT once. For a very short time the default time of an APRT can
be seen at the desk, then the tomo time contact might override the default
time. This time must be saved using the desk save function: push and hold the RESET labeled button + active APRT.
Now the programmed tomo time 1...8 is copied and saved at the APRT data set. If
it is not saved then the default APRT time will come up again if the APRT is
pushed a second time or if an APRT with the same tomo time is selected.
The tomo time input only reacts to a high >> low transition of the time
contact input.
- If tomo is programmed at 'RGDV Data Set
A + B' it is not possible to change
the exposure time at the desk. If APRT with the same tomo trajectory have to be
corrected time dependent then an APRT with another tomo trajectory has to be selected.
Afterwards select the APRT which has to be modified to get the high >>
low time input response.
- It might happen that three tomo times
can be seen at the desk after pushing an APRT button: At first the APR time is
displayed. The second time might be tomo time number 1, as long as all time
input contacts of the tomo stand are open. If then any tomo time contact is
closed, the status change will cause the display of the programmed tomo time
Active if programmed at 'RGDVx Data Set A + B' for CAN systems:
Bucky TH, TH2, Digital Diagnost
("<" marked not for
DiDi) systems with TOMO option provide 16 tomo sweeps:
tomo # |
sweep |
tomo # |
sweep |
||
Bucky |
Optimus |
Bucky |
Optimus |
||
0 |
1 |
8º / 0.8s |
8 |
9 |
30º / 1s |
1 |
2 |
8º / 1s |
9 |
10 |
30º / 2s |
2 |
3 |
8º / 2s |
10< |
11< |
30º / 3s |
3 |
4 |
20º / 0.8s |
11< |
12< |
30º / 4s |
4 |
5 |
20º / 1s |
12 |
13 |
40º / 1.2s |
5 |
6 |
20º / 2s |
13 |
14 |
40º / 2s |
6< |
7< |
20º / 3s |
14< |
15< |
40º / 3s |
7 |
8 |
30º / 0.8s |
15< |
16< |
40º / 4s |
If the default programmed tomo times in the APR data set are different to the tomo times sent by the bucky system the default APR time appears for a very short moment, then the time will be overridden by the controller message. If so, use the save function of the desk to save the proper tomo time in the APR data set.
[P] Spectral Filter:
Gives a selection of the three filter
types of the GALILEO collimator BuckyTH, TH2, Digital Diagnost, Thoravision:
no filter
2 mm AL
0.1 mm CU + 1 mm Al
0.2 mm CU + 1 mm Al
[P] Fluoroscopy curve:
One out of the 20 ‘Fluoroscopy curves’ (the ones which have been loaded with default data sets can) be selected.