"SIH-RADS 0: technical failure"
"SIH-RADS 1: definite negative"
"SIH-RADS 2: unlikely positive"
"SIH-RADS 3: possible positive"
"SIH-RADS 4: definite positive - uncertain origin"
"SIH-RADS 5: definite positive - precise localisation"
"Spontaneous Intracranial Hypotension Reporting and Data System (SIH-RADS) is a proposed (October 2025) standardised scoring system designed to categorise findings on dynamic myelography in patients with suspected spontaneous intracranial hypotension 1."
"SIH-RADS 0: technical failure"
"SIH-RADS 1: definite negative"
"SIH-RADS 2: unlikely positive"
"SIH-RADS 3: possible positive"
"SIH-RADS 4: definite positive - uncertain origin"
"SIH-RADS 5: definite positive - precise localisation"
"a negative result (low SIH-RADS score) should be interpreted in clinical context and should not independently preclude repeat testing or empiric therapy"
"intermediate categories (SIH-RADS 3 and 4) reflect a continuum of diagnostic confidence"
Expected headings
"Classification"
"artifact favoured; findings unlikely to represent true CSF leak of CVF"
"myelography sensitivity varies by technique; factors such as timing, contrast attenuation, respiratory phase, CSF pressure augmentation, and use of photon-counting CT"