You do understand “intellectual image” refers to the “concept” or “idea” don’t you?
Linus, it doesn’t matter how you do your post-mortem. You clearly opined the the phantasm is immaterial. It is not, that is an error of Hume and company.
But don’t argue with me, argue with respected Thomists - for example the J. Maritain tradition:*
10. …This intellectual image should not be confounded with the sensible image, or phantasm, which is a material representation of material objects, and which is formed by the imagination, by means of the material organ of the brain. The difference between these two images is great, and distinction between them is of vital importance in Philosophy. For instance, I intellectually conceive a triangle by apprehending a figure enclosed by three lines and thus having three angles. My notion or idea contains this and nothing more; it is very precise, and every one who conceives a triangle conceives it exactly the same way. But when I imagine a triangle, I cannot help imagining it with sensible material accidents, as being of such or such a size and shape, a foot long at one time, a mile long at another. The picture may be vague, various pictures of triangles may be blended together; but it can never be universal, representing all possible triangles, as my idea does. This imagination is a phantasm. True, phantasms are often called ‘ideas’ by English writers; in fact, the whole school of Berkeley, Hume, and their followers fail to trace any difference between them; it is the fundamental error of their pernicious philosophy. Thus, for instance, Huxley maintains that God, the soul of man, etc., are unknowable and unthinkable,{1} because we can form no phantasm of them. This makes them simply unimaginable, not unknowable nor unthinkable; we know what we mean when we speak of them. (On the difference between ideas and phantasms see, further, Logic, by Richard Clarke, S.J., c. vi.) "*