Scan Computer Instructions
1) Check variance from last night’s check: Get printout from other room –
Look at average variance (shld be around 1.0-1.5)
2) Sign off - to clear off everything
Right mouse - Exit Sunview
3) Log on: Password: ecat
bloodflow
4) Open:
Color tool, clock, unix shells (type cdat in each one to put you in the
/ecat/ subdirectory)
Resize windows: grab corner use control-middle mouse button to
resize
Open ecat tool - unix shell
5) ACS Window
Go to unix shell, type tip acs
Then reboot acs computer in back room (left column reset
button)
Wait until reboot is done in tip window
On scan computer, type abortscan on one unix shell
**must do this after rebooting!
Open acs shell:
login: ecat
password: ecatecat
Put tape into ACS computer (monkey or human tape)
6) Check blank:
Right mouse button, open service tool, acquire and display.
Take grey scale to 25%
File: /sd0/970123bl1.scn (yr-mo-day-bl1)
Look at blank - should be dark at the beginning and end, but
uniform grey throughout the middle
Clear screen, grey scale 60%
Display normalized sinogram
Change grey scale to 100 rainbow
Service Tool – Quit
If blank did not run, run:
Then:
7) Set up dat
scanBlank
procBlank
Open unix shell for dat window
Type cdat
Type ed m640.dat (study name.dat)
In dat file, type m640.dat 970123 (yr-mo-day) 953b 2d wob
Note difference between clock on computer and scanner clock
Right mouse button - Save file
8) Set up plt
Open online display: right mouse button,
ecat tools, online display,
ecat tools, plot trues, plot deadtime
Rename plt file to first scan # , e.g. /ecat_data/m642ho1.plt
Choose log all data, produce summary, produce header
Change update time to 1.0
9) Skull xray
Center head vertically, then:
Turn on toggle switch for laser,
Slide in until laser is in middle of brain
report –a (when head is centered)
Move -b XXX (Horizontalreport - 363.7) (Xray position)
report –a
Copy to dat file
Take skull xray
Adjust to correct based on skull xray
Move –b XXX (desired position; “in 10mm” take first
Horizontalreport and add 10)
Report –a
Copy new report –a to dat file and state any change in position
“in 10mm”
10) Transmission scanTrans pXXXX tr1 600
(10min = 600 for humans, 15min = 900 for monkeys if have
time)
11) Process trans procTrans pXXXXtr1 daysblank normalsta 1.875 (human)
procTrans mXXXtr1 daysblank normalsta 2.0 (monkey)
daysblank = 970501bl1 (to find out last blank, ACS
utilities – ACS dist utilities - directory)
12) Scan
scanWob m642 ho1 40 O-15 H2O
3 frame = scanWob3f …..
Return, this will load buckets.
Place cursor in dead space until ready
A few seconds or so before injection, start plt window
Then place cursor in scanWob window
NOTE BACKGROUND COUNTS
At now hit return, hard. NOTE TIME!
Watch head counts - when they jump beyond background
counts, hit return again, hard. NOTE TIME!
Watch head counts, NOTE PEAK COUNTS
At end of scan, stop plt file, start again, put in new ho# name
Close crv window
Open dat window
Copy and save info to dat (click left mouse button at the
beginning of text, middle mouse at the end of text, then
copy and paste buttons)
Save and close
13) Abort scan
abortscan
acs utilities – acs disk util – dir – delete the water
14) Archive
tarchive sd0 -prefix p (or m) -mail jth@npg -no3d
highlight dat file, choose Services, printing, print selected text
rm backup dat file *.dat%
mv pXXXX* (or mXXX*) /data/raw/953b/patient or monkey
15) Screen Lock