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Introduction to CTB - Interactive Guide

Step-by-step guide on the use of Harrison.ai CT Brain (CTB)

Apr 14, 2026
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Frequently Asked Questions

  • Do I use CTB in place of my PACs viewer?

    No, the CTB viewer displays a compressed JPEG rather than the full DICOM image. We recommend using the Harrison Viewer along-side your PACs to interrogate the findings listed.

  • Can I expand the application automatically to reduce clicks?

    Yes, the application behaviour can be adjusted using the settings (cog) icon. See the Settings Guide (interactive or video) for more details.

  • What does the term child findings refer to?

    Child findings are additional clinical detail provided by the model. For example, haematoma (parent finding) can be further classified into extra-axial or subdural (child findings).

  • How should I interpret the confidence bar and the detection threshold?

    The confidence bar provides a human element to the AI output. This can be used to inform your clinical judgement as to the presence/absence of each finding. Each finding must meet a threshold to be listed in the viewer; this threshold is shown as the vertical white bar on the confidence scale.

  • Can I change the group which a finding belongs to?

    Yes, this can be updated to match your practices clinical needs. Contact your customer success manager for more information.

  • Is it possible to adjust the thresholds of findings?

    In most cases yes, contact your customer success manager for more information.

  • What findings does CTB detect?

    There is a full ontology tree (findings list) available here. Keep in mind that your specific practice may have a customised findings list, contact your system administrator or customer success manager for the exact configuration.