Splanchnography refers to a medical imaging technique that involves the visualization of internal organs by use of X-rays or other imaging modalities. If you're looking for synonyms for this term, there are some options to consider. One possible synonym could be "visceral imaging," which encompasses any diagnostic imaging technique that provides visual information about the organs within the body's cavities. Other alternatives might include terms like "organography," "abdominal imaging," or "gastrointestinal radiography." Ultimately, the most appropriate synonym would depend on the precise imaging method applied, as well as the context in which the term is used. Nevertheless, these alternatives offer some possible ways to describe medical imaging studies that involve examining the organs within the abdomen and pelvis.