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A method for verification of treatment delivery in HDR prostate brachytherapy using a flat panel detector for both imaging and source tracking

Overview of attention for article published in Medical Physics, April 2016
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Title
A method for verification of treatment delivery in HDR prostate brachytherapy using a flat panel detector for both imaging and source tracking
Published in
Medical Physics, April 2016
DOI 10.1118/1.4946820
Pubmed ID
Authors

Ryan L Smith, Annette Haworth, Vanessa Panettieri, Jeremy L Millar, Rick D Franich

Abstract

Verification of high dose rate (HDR) brachytherapy treatment delivery is an important step, but is generally difficult to achieve. A technique is required to monitor the treatment as it is delivered, allowing comparison with the treatment plan and error detection. In this work, we demonstrate a method for monitoring the treatment as it is delivered and directly comparing the delivered treatment with the treatment plan in the clinical workspace. This treatment verification system is based on a flat panel detector (FPD) used for both pre-treatment imaging and source tracking. A phantom study was conducted to establish the resolution and precision of the system. A pretreatment radiograph of a phantom containing brachytherapy catheters is acquired and registration between the measurement and treatment planning system (TPS) is performed using implanted fiducial markers. The measured catheter paths immediately prior to treatment were then compared with the plan. During treatment delivery, the position of the (192)Ir source is determined at each dwell position by measuring the exit radiation with the FPD and directly compared to the planned source dwell positions. The registration between the two corresponding sets of fiducial markers in the TPS and radiograph yielded a registration error (residual) of 1.0 mm. The measured catheter paths agreed with the planned catheter paths on average to within 0.5 mm. The source positions measured with the FPD matched the planned source positions for all dwells on average within 0.6 mm (s.d. 0.3, min. 0.1, max. 1.4 mm). We have demonstrated a method for directly comparing the treatment plan with the delivered treatment that can be easily implemented in the clinical workspace. Pretreatment imaging was performed, enabling visualization of the implant before treatment delivery and identification of possible catheter displacement. Treatment delivery verification was performed by measuring the source position as each dwell was delivered. This approach using a FPD for imaging and source tracking provides a noninvasive method of acquiring extensive information for verification in HDR prostate brachytherapy.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 39 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Canada 1 3%
Unknown 38 97%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 10 26%
Professor 4 10%
Researcher 4 10%
Student > Bachelor 3 8%
Professor > Associate Professor 3 8%
Other 7 18%
Unknown 8 21%
Readers by discipline Count As %
Physics and Astronomy 18 46%
Engineering 5 13%
Medicine and Dentistry 3 8%
Economics, Econometrics and Finance 1 3%
Pharmacology, Toxicology and Pharmaceutical Science 1 3%
Other 2 5%
Unknown 9 23%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 April 2016.
All research outputs
#19,945,185
of 25,374,917 outputs
Outputs from Medical Physics
#5,993
of 7,984 outputs
Outputs of similar age
#218,350
of 313,428 outputs
Outputs of similar age from Medical Physics
#94
of 157 outputs
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So far Altmetric has tracked 7,984 research outputs from this source. They receive a mean Attention Score of 3.5. This one is in the 19th percentile – i.e., 19% of its peers scored the same or lower than it.
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