Is C-telopeptide the same as CTX?

Could you please clarify the relationship between C-telopeptide and CTX? Are they interchangeable terms referring to the same biomarker, or do they represent distinct biological markers with unique functions? Given their apparent similarity in name, it's natural to assume they might be closely related, but I'm keen to understand the precise differences, if any, between the two. This distinction is particularly important in the context of medical diagnostics and research, where precise terminology is crucial for accurate interpretation of results. Thank you for your assistance in clarifying this matter.