A novel technique for direct verification of Ir‐192 source position in a multi‐channel vaginal cylinder using a mobile CBCT Article Swipe
Alexis Webb
,
Keita Okazaki
,
Wenchao Cao
,
Yevgeniy Vinogradskiy
,
Firas Mourtada
,
Yingxuan Chen
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/mp.70128
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/mp.70128
Background For gynecological brachytherapy, multichannel vaginal cylinders (MCVC) offer improved control of the dose distribution as compared to single channel cylinders due to their peripheral channels. Evaluation of the source position in each channel is a crucial step when commissioning these applicators that can help to reduce systematic uncertainties, but is challenging with standard 2D techniques. Purpose In this study, we developed a novel technique that utilizes cone‐beam computed tomography (CBCT) to directly verify the position of the Ir‐192 source inside MCVC peripheral channels. Methods A mobile CBCT device was used to acquire 3D images of the source dwelling in the most distal position of the central and each peripheral channel of a MCVC using the same scan protocol and field of view. The source remained in the distal position inside each catheter while acquiring CBCT. All 3D images were combined to create a maximum intensity projection (MIP) image, showing the source in each catheter in a single image. The MIP image was imported into the treatment planning system and aligned with the applicator model. The position of the Ir‐192 source center was measured and directly compared with the digitized source position. Two plans were developed to determine the ideal catheter indexer length for the peripheral catheters. Results The Ir‐192 source position can be directly measured on the CBCT images. The ideal indexer length was determined, which showed an average deviation between the manually identified and digitized source of 0.7 ± 0.2 mm in the peripheral catheters. In addition, a 0.9 mm shift in the anterior‐posterior direction was observed in the central tandem due to gravity. Conclusion The proposed novel technique using CBCT allows for direct measurement of the source position in the MCVC applicator, which improves the source digitization process and reduces uncertainties in treatment planning and delivery.
Related Topics
Concepts
Position (finance)
Computer science
Scanner
Instrumentation (computer programming)
Channel (broadcasting)
Cylinder
Computer vision
Field of view
Biomedical engineering
Nuclear medicine
Interference (communication)
Projection (relational algebra)
Catheter
Dosimetry
Medical imaging
Intensity (physics)
Standard deviation
Artificial intelligence
Maximum intensity projection
Iterative reconstruction
Cone beam computed tomography
Brachytherapy
Optics
Peripheral
Millimeter
3D ultrasound
Fluoroscopy
Tomography
Image processing
Artifact (error)
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/mp.70128
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mp.70128
- OA Status
- bronze
- References
- 18
- OpenAlex ID
- https://openalex.org/W7104792976
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W7104792976Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/mp.70128Digital Object Identifier
- Title
-
A novel technique for direct verification of Ir‐192 source position in a multi‐channel vaginal cylinder using a mobile CBCTWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2025Year of publication
- Publication date
-
2025-11-01Full publication date if available
- Authors
-
Alexis Webb, Keita Okazaki, Wenchao Cao, Yevgeniy Vinogradskiy, Firas Mourtada, Yingxuan ChenList of authors in order
- Landing page
-
https://doi.org/10.1002/mp.70128Publisher landing page
- PDF URL
-
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mp.70128Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mp.70128Direct OA link when available
- Concepts
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Position (finance), Computer science, Scanner, Instrumentation (computer programming), Channel (broadcasting), Cylinder, Computer vision, Field of view, Biomedical engineering, Nuclear medicine, Interference (communication), Projection (relational algebra), Catheter, Dosimetry, Medical imaging, Intensity (physics), Standard deviation, Artificial intelligence, Maximum intensity projection, Iterative reconstruction, Cone beam computed tomography, Brachytherapy, Optics, Peripheral, Millimeter, 3D ultrasound, Fluoroscopy, Tomography, Image processing, Artifact (error)Top concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- References (count)
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18Number of works referenced by this work
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