Scout-It: Interior tomography using modified scout acquisition

TL;DR

This paper introduces a modified scout acquisition method for clinical CT that enables accurate interior reconstruction in cases of partial truncation, addressing limitations of previous global scout view techniques.

Contribution

The paper proposes a new acquisition configuration that allows non-truncated AP scout views in partially truncated CT scans, improving interior reconstruction accuracy.

Findings

Modified scout configuration enables accurate interior reconstruction.

Effective in cases of partial truncation in clinical CT.

Addresses limitations of previous global scout view methods.

Abstract

Global scout views have been previously used to reduce interior reconstruction artifacts in high-resolution micro-CT and C-arm systems. However these methods cannot be directly used in the all-important domain of clinical CT. This is because when the CT scan is truncated, the scout views are also truncated. However many cases of truncation in clinical CT involve partial truncation, where the anterio-posterior (AP) scout is truncated, but the medio-lateral (ML) scout is non-truncated. In this paper, we show that in such cases of partially truncated CT scans, a modified configuration may be used to acquire non-truncated AP scout view, and ultimately allow for highly accurate interior reconstruction.