Optimized visualization of contrast medium dependent differences in CT/MRI scans by RGB transformation

Area of Science:

• Medical Imaging
• Radiology
• Neuroimaging

Background:

• Assessing contrast medium enhancement in neuroimaging requires manual comparison of native and contrast-enhanced scans.
• This manual comparison is time-consuming and prone to interpretation errors, especially for regions with a disrupted blood-brain barrier.

Purpose of the Study:

• To develop an objective and efficient method for visualizing contrast medium enhancement in CT and MRI scans.
• To reduce the time and potential errors associated with manual subtraction of medical images.

Main Methods:

• A novel offline processing technique combines corresponding native and contrast-enhanced scans.
• Scans are assigned to RGB color channels, creating a single composite color image using additive color mixture.
• This method visualizes contrast-dependent changes within the RGB color space.

Main Results:

• Contrast medium-induced changes are clearly depicted as complementary color contrasts in a single image.
• Unchanged anatomical structures are preserved in their original black and white appearance.
• The technique allows for optimized visualization of contrast enhancement.

Conclusions:

• The developed visualization method significantly saves time for neurosurgeons.
• It offers an objective representation of contrast medium-dependent differences, reducing diagnostic errors.
• This approach leads to a reduced number of images required for interpretation.