Common questions and answers
About program execution
About Excel
Q1: When importing data files into Excel, the decimal values are not read
correctly. Why?
Q2: When saving numerical data from Excel, the decimal separator is comma.
Is that a problem?
A: Windows software is, by default, using local
decimal separator,
which is comma in Finland, Germany, France and Italy, and point in UK, USA and
Japan. In-house software is mainly assuming decimal points.
S1: Change the
decimal
separator from comma to dot in Windows or in Excel.
S2: Use the latest versions of
dft2html or
dft2html
to convert data files into XHTML table format and import those in Excel.
Q: When importing result files / ROI TAC files into Excel, the data is not aligned
in columns, and cannot be used in formulas.
A: When you import a .res or .dft file directly into Excel, it reads the contents
as text into one spreadsheet column.
S: Convert the data files to XHTML table format using
dft2html or
dft2html
and import those in Excel.
About analysis software
Q1: I try to make a sum image, but I get an error "in integration".
Q2: I try to calculate a parametric image, but I get an error "cannot interpolate input
data".
A: You have a problem with your dynamic PET image. Most common reasons are that some frames are missing
check that image file size is the same as in other studies, or that there is a problem with frame
times.
S: If image is of wrong size, then get a new copy of it.
You can correct the frame time problem by yourself.
Q: Usually program just does what it is intended and quits, but sometimes
program prints on screen a lot of stuff?
A: You have unintentionally ran the program in its test mode. Lots of printing
on screen may even slow down the program.
S: Do not use the string 'test' in output filenames or other arguments for the
program.
Q: The MRI images look strange, the lowest part of patient head are located
above the head. Is there a problem in DICOM files or format conversion?
A: There is no problem in programs or image files. This is a common artefact
in MRI, called aliasing or wrap-around.
S: This artefact can not be corrected after the MRI scan. Show the images
to MRI physicist, because the artefact can be reduced in the future MR scans.
Q: Results from HR+ or PET-CT are orders of magnitude higher than they should be.
A: Check that the units of radioactivity (kBq/ml, Bq/ml) are the same in your
input data (plasma and blood) and in image/regional TAC data.
S: Follow the instructions in
http://www.turkupetcentre.net/analysis/doc/calibration.html.
Q: I try to run program on Windows 2000/XP, but get an error message "The
system cannot execute the specified program".
A: Programs are compiled with MinGW or DJGPP, and Windows 2000/XP does not
always treat these programs correctly.
S: Try to avoid very long filenames and deeply nested directories.
Alternatively, you can write the command into an ASCII text file and execute it
using program execlong.
About Imadeus
Q: "Floating point division by zero" error when reading Analyze 7.5 image
A: Analyze image may be in 32-bit format.
S: Convert image to 16-bit data using Matlab program ana32to16.
Scripts / batch files
Q: How to make a script?
A:
http://www.turkupetcentre.net/analysis/batch_info.html#how
Q: How to call blood input scripts from my own scripts?
A: You have to use cscript engine to execute WSH scripts and you have to
enter full path to the VBScript file.
S: For example, cscript P:\bin\windows\PK11195_input.vbs ...
