Assessment of 4D Ultrasound Systems for Image-guided Radiation Therapy - Image Quality, Framerates and CT Artifacts

Svenja Ipsen*, Ralf Bruder, Verónica García-Vázquez, Achim Schweikard, Floris Ernst

*Korrespondierende/r Autor/-in für diese Arbeit
1 Zitat (Scopus)

Abstract

4D ultrasound (4D US) is gaining relevance as a tracking method in radiation therapy (RT) with modern matrix array probes offering new possibilities for real-time target detection. However, for clinical implementation of USguided RT, image quality, volumetric framerate and artifacts caused by the probe's presence during planning and / or setup computed tomography (CT) must be quantified. We compared three diagnostic 4D US systems with matrix array probes using a commercial wire phantom to measure spatial resolution as well as a calibration and a torso phantom to assess different image quality metrics. CT artifacts were quantified in the torso phantom by calculating the total variation and percentage of affected voxels between a reference CT scan and CT scans with probes in place. We found that state-of-the-art 4D US systems with small probes can fit inside the CT bore and cause fewer metal artifacts than larger probes. US image quality varies between systems and is task-dependent. Volume sizes and framerates are much higher than the commercial guidance solution for US-guided RT, warranting further investigation regarding clinical performance for image guidance.

OriginalspracheEnglisch
ZeitschriftCurrent Directions in Biomedical Engineering
Jahrgang5
Ausgabenummer1
Seiten (von - bis)245-248
Seitenumfang4
ISSN2364-5504
DOIs
PublikationsstatusVeröffentlicht - 01.09.2019

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