Reduction of applicator displacement in MR/CT-guided cervical cancer HDR brachytherapy by the use of patient hover transport system

Megan Andrew; Yusung Kim; Timothy Ginader; Brian J Smith; Wenqing Sun; Dongxu Wang

doi:10.5114/jcb.2018.73755

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Reduction of applicator displacement in MR/CT-guided cervical cancer HDR brachytherapy by the use of patient hover transport system

Journal article

Open access

Peer reviewed

Reduction of applicator displacement in MR/CT-guided cervical cancer HDR brachytherapy by the use of patient hover transport system

Megan Andrew, Yusung Kim, Timothy Ginader, Brian J Smith, Wenqing Sun and Dongxu Wang

Journal of contemporary brachytherapy, Vol.10(1), pp.85-90

02/2018

DOI: 10.5114/jcb.2018.73755

PMCID: PMC5881589

PMID: 29619060

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Abstract

To quantify the reduction of relative displacement between the implanted intracavitary applicator and the patient bony anatomy, due to the use of a hover transport system during the patient transports between the imaging table and the treatment table. The displacement of the applicator inside the patient was measured by comparing the distance between the tip of the tandem and the pubic bone on X-ray radiography images taken before and after moving a patient to magnetic resonance/computed tomography imaging. Displacements were evaluated for 27 fractions of treatment using hover transport and 185 fractions of treatment using manual transport. The use of hover transport system reduced the percentage of fractions with displacements greater than 5 mm from 22.7% to 7.4%. The reduction of applicator displacement using hover transport is statistically significant, compared to the manual transport method ( -value 0.0086; mean displacement 3.41 mm [95% CI: 2.96-3.97] for manual transport, and 2.27 mm [95% CI: 1.71-2.97] for hover transport fractions). This study indicates that the hover transport system is effectively reducing displacement between tandem and patient bony anatomy during patient transports. The potential improvement in dosimetric accuracy due to this reduction warrants further study.

applicator displacement

MRI-guided

cervical cancer

HDR

Details

Title: Subtitle: Reduction of applicator displacement in MR/CT-guided cervical cancer HDR brachytherapy by the use of patient hover transport system
Creators: Megan Andrew - Department of Radiation Oncology, University of Iowa Hospitals and Clinics
Yusung Kim - Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics
Timothy Ginader - Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics
Brian J Smith - Department of Biostatistics, University of Iowa, Iowa City, IA, USA
Wenqing Sun - Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics
Dongxu Wang - Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics
Resource Type: Journal article
Publication Details: Journal of contemporary brachytherapy, Vol.10(1), pp.85-90
DOI: 10.5114/jcb.2018.73755
PMID: 29619060
PMCID: PMC5881589
NLM abbreviation: J Contemp Brachytherapy
ISSN: 1689-832X
eISSN: 2081-2841
Publisher: Poland
Grant note: P30 CA086862 / NCI NIH HHS
Language: English
Date published: 02/2018
Academic Unit: Biostatistics; Radiation Oncology; Holden Comprehensive Cancer Center
Record Identifier: 9983997443402771

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