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August 30, 2026Brain Structure and FunctionOpen Access

ACPC-MAP: a protocol for manually aligning structural T1-weighted magnetic resonance images to the anterior commissure – posterior commissure plane according to clinical standards

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Authors

ASAshok K. SelvarajRBRonald BartelsCBChristian Beckmann

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Overview

Methodological study demonstrates a standardized protocol for manually aligning structural MRI to the clinical AC-PC plane, highlighting improved consistency across research and neurosurgery.

Key Points

  • To establish and validate a standardized protocol (ACPC-MAP) for manually realigning structural T1-weighted MR images to the clinically utilized Schaltenbrand anterior commissure–posterior commissure plane.
  • Formulated standardized visual anatomical criteria to guide the manual orientation and alignment of structural T1-weighted MR images to the Schaltenbrand AC-PC stereotactic axis.
  • Structured the protocol to resolve inconsistencies between neurosurgical standards and neuroimaging research atlases like Talairach, providing an explicit workflow for human raters.
  • Yielded an explicit, reproducible manual alignment system to overcome discrepancies between varied AC-PC definitions used across clinical and neuroimaging domains.
  • Provided a standardized method to verify automated alignment outcomes, correct failures in automated processing pipelines, and generate high-fidelity ground truth reference data.

Cite This Study

Selvaraj et al. (2026) studied this question.

synapsesocial.com/papers/6a93efc06c1a8fb52e79bc47https://doi.org/10.1007/s00429-026-03171-z
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  2. 2A modality‐independent approach to spatial normalization of tomographic images of the human brain1995 · 263 citations