Breathing-Adapted Imaging Techniques for Rapid 4-Dimensional Lung Tomosynthesis.

Document Type

Article

Publication Date

1-18-2023

Publication Title

Advances in Radiation Oncology

Abstract

PURPOSE: This article presents enhancements to a 4-dimensional (4D) lung digital tomosynthesis (DTS) model introduced in a 2018 paper. That model was proposed as an adjunct to 4D computed tomography (4DCT) to improve tumor localization through artifact reduction achieved by imaging the entire lung in all projections, reducing the projection collection time duration for each phase compared with 4DCT, and requiring only a single-breath cycle to capture all phases. This is applicable to SABR treatment planning. Enhancements comprise customized patient 4D-DTS x-ray scanning parameters.

METHODS AND MATERIALS: Imaging parameters derived with the 4D-DTS model were arc duration, frames per second, pulse duration, and tube current normalized to single-chest radiographic milliampere-seconds (mA/mAs

RESULTS: 4D-DTS imaging techniques were customized to volunteer respiratory waveforms and sinusoidal waveforms. Technique settings at the highest velocity portions of the volunteer waveforms were arc duration 0.066 seconds, frame rate 921 Hz, pulse duration 1.076 ms, and normalized tube current 76.2 s

CONCLUSIONS: 4D-DTS image technique settings can be customized to individual patient breathing patterns so that captured range of motion satisfies an operator-selected value.

Volume

8

Issue

4

First Page

101173

Last Page

101173

DOI

10.1016/j.adro.2023.101173

ISSN

2452-1094

PubMed ID

36852404

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