metal artefact reduction algorithm
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2021 ◽  
pp. 20200189
Author(s):  
Peter Abernethy ◽  
Neil G McIntyre ◽  
Alexander Sanchez-Cabello ◽  
Ross Kruger ◽  
Dushyant Shetty

We present the case of a 20 year old female patient who presented following ingestion of multiple button magnets. She remained clinically well however serial abdominal radiographs demonstrated the magnets were not passing through the gastrointestinal tract and a CT was therefore performed for further assessment and to aid surgical planning. Artefact from the magnets made interpretation of the CT challenging. The use of a Metal Artefact Reduction (MAR) algorithm however enabled accurate localisation of the magnets thus guiding subsequent surgical intervention. Whilst MAR algorithms are usually used in the assessment of iatrogenic metallic devices (e.g., joint prostheses), this case demonstrates an example of their potential wider use.


Author(s):  
Serena Jayne Hilman ◽  
Thomas Bird ◽  
Piotr Gieryluk ◽  
Amy Richardson ◽  
Petra Jacobs

Abstract Aims: To investigate the use of co-registration of the computerised tomography (CT) planning scan with transperineal ultrasound (TPUS) as an aid to the delineation of the clinical target volume (CTV), and the use of TPUS as a tool for inter- and intra-fractional monitoring in men with bilateral hip prostheses (b-P) undergoing prostate radiotherapy. Materials and methods: We marked the CTV of three patients with and without the co-registered TPUS images. A metal artefact reduction algorithm was utilised. Two patients were treated with intensity-modulated radiotherapy (IMRT) and one with volumetric-modulated arc therapy (VMAT). The inter- and intra-fractional monitoring details were reviewed retrospectively. Results: Clinician marking with TPUS/CT fusion improved the confidence of prostate CTV delineation leading to a consistent change in volumes across two observers. Inter- and intra-fractional monitoring was possible using TPUS as image guidance, as it is for those patients with non-prosthetic hips. Findings: Using TPUS in the radiotherapy workflow has enabled us to more confidently plan, treat and monitor patients with b-HP. Due to transperineal image acquisition, the ultrasound images are not affected by the presence of hip prostheses, which are outside the field of view.


2017 ◽  
Vol 28 (1) ◽  
pp. 265-273 ◽  
Author(s):  
Qeumars Mustafa Hamie ◽  
Adrian Raoul Kobe ◽  
Leif Mietzsch ◽  
Michael Manhart ◽  
Gilbert Dominique Puippe ◽  
...  

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