Original ResearchPublished 23 September 2026Exploratory evaluation of spinopelvic and lumbar parameters in adolescent athletes with isthmic spondylolisthesis: feasibility and reliability of upright MRI compared to radiographyMichael Cassel · Theresa Joost · Chase Slater · Frank Mayer · Tilman EngelFrontiers in Radiologydoi 10.3389/fradi.2026.1929174