IVC Window Agreement Study

The existing literature presents conflicting results regarding the interchangeability of these windows. Several studies report significant discrepancies between SC and RC measurements, while others demonstrate strong agreement. Direct comparison of the SC and aTH windows has received considerably less attention, with only a single prospective study to date reporting reliable agreement between these approaches under standardized imaging criteria.

Methodological heterogeneity, most likely arising from an unstandardized imaging technique, underlies much of the observed discordance. As a result, clinicians lack clear guidance on whether alternative windows can reliably substitute for the SC approach across diverse clinical settings.