Re: Lookup tables and subsequent measurements

Posted by Christopher Lloyd-2 on Apr 23, 2008; 8:52pm
URL: http://imagej.273.s1.nabble.com/Lookup-tables-and-subsequent-measurements-tp3696434p3696440.html

Using a spectrum also does not actually change anything for the measurements in ImageJ, as the
region of interest yields the same mean when you measure under the spectrum map, the standard
map, or the custom LUT I've put in (along with a few others I tried for fun).

Yes, you could derive the mean from a re-mapped distribution using the histogram.  At 30 patients
(and counting), 6-10 movies per patient, and ~100 frames per patient, that's an awful lot of
histograms (an optimistic estimate is 40 manhours of time to extract those histograms only), when
changing the actual distribution to be analyzed is, in principle, so much easier, especially
considering the analysis was as simple as hitting "m" for each frame when the data is mapped
linearly from the ultrasonic field to the greyscale of the machine (which sadly is not the case on this
new machine).  Perhaps I was mistaken.