Of Jacobians,Fourier space routes and Kaczmarz algorithms

I do manage to sound like a geek,don't I?But trust me,I'm as alien to all this stuff as any normal being.So I was obviously overawed and intimidated when I saw these things included in my course,which had an equally strange name....Computerized Tomography.Fortunately,I came back to my senses in time and dropped it for a course in Philosophical problems.This one isn't easy by any stretch of imagination,but I'd always prefer a tough humanities course over a tough technical one.Now just don't ask what I'm doing in a technical institute...