comp.protocols.dicom - Digital Imaging and Communications in Medicine.
After reading PS3.14-2004, following questions come up: 1. Figure 6.1 shows "Modality -> VOI -> Polarity -> Presentation -> Standard display system". Modality here means data from "Modality LUT IE" in an IOD? 2. "VOI" here means transformation based on "VOI LUT IE"? 3. "Polarity" here means transformation based on what? 4. "Presentation" here means transformation based on "PRESENTATION STATE IE"? 5. Are things like "Curve IE", "Palette color lut" used in this process? Any other information (IOD modules) used in this process but not mentioned above? 6. After presentation lut transformation, we will get "both device independent and conceptually perceptually linear" data. Is this data linear "relative to" what? the "strength" of x-ray signal? density of the object/person being tested? Let's just use CR and DX as examples here. 7. The part I do not understand is why not do window width/center kind of "linear" transformation (considered as part of VOI LUT) AFTER presentation transformation? In other words, shouldn't the device independent and conceptually perceptually linear P-Value be the ideal space to run any linear transformation based upon? If you run VOI before "Polarity -> Presentation", your linear VOI transformation may no longer be linear in P-value space. What is the point?