% TODO: Related Work.
% This section did not exist in the original MDPI template (which goes
% straight from Introduction to Materials and Methods) -- it is new for
% this manuscript. Summarize prior work on IVUS-based prediction of
% no-reflow/slow-flow after PCI and related CNN-LSTM / image-based
% approaches, positioning this paper's contribution relative to it.
%
% Per CLAUDE.md: Reference/main.tex, Reference/main_ja.tex, and the
% thesis PDF are useful for prose style and terminology, but any numbers,
% dataset descriptions, or results cited here must come from current
% data the user provides -- not copied from those older documents.