Automated quality assurance of HDR brachytherapy: Evaluation of Dwell‐position accuracy and Dwell‐time linearity via image processing of radiochromic films.
Purpose: To develop and validate a fully automated quality assurance method for high‐dose rate (HDR) brachytherapy, enabling the precise evaluation of source dwell‐position accuracy and dwell‐time linearity using radiochromic film analysis and advanced image processing algorithms. Methods: A novel a...
| Publicado en: | Precision Radiation Oncology Vol. 10; no. 2; pp. 137 - 147 |
|---|---|
| Autores principales: | , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Wiley-Blackwell
Jun2026
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=194812428&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 194812428 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23987324 L3KI jtl: Precision Radiation Oncology issn: 23987324 maglogo: N pubinfo: dt: Jun2026 vid: 10 iid: 2 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 194812428 190428543 194812428 194812428 10.1002/pro6.70040 194812428 ppf: 137 ppct: 10 formats: tig: atl: Automated quality assurance of HDR brachytherapy: Evaluation of Dwell‐position accuracy and Dwell‐time linearity via image processing of radiochromic films. aug: au: Yuan, Qingqing Bi, Suyan Lou, En Jia, YaJun Dai, Zhitao affil: National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China sug: subj: Brachytherapy Equipment and Supplies Quality Assurance Automation Image Processing, Computer Assisted Methods Systems Development Systems Validation Algorithms Validity X-Ray Film Human Experimental Studies Repeated Measures Comparative Studies Scanners Software Linear Regression Correlation Coefficient Data Analysis Software Descriptive Statistics Funding Source ab: Purpose: To develop and validate a fully automated quality assurance method for high‐dose rate (HDR) brachytherapy, enabling the precise evaluation of source dwell‐position accuracy and dwell‐time linearity using radiochromic film analysis and advanced image processing algorithms. Methods: A novel analytical framework was established to verify HDR source positional precision and dwell‐time linearity. Radiochromic films were irradiated under predefined treatment plans. Image preprocessing involved grayscale conversion, median filtering, rotation correction, and absolute coordinate calibration. The centroid of each dwell position was determined using two‐dimensional Gaussian fitting. Temporal linearity analysis employed radial grayscale summation within the radii of 250–400 pixels. Linearity was quantified using the coefficient of determination (R2), with R2 approaching 1 indicating optimal performance. Results: Automated Gaussian fitting achieved sub‐millimeter positional accuracy (maximum error ≤ 0.6 mm), eliminating manual intervention. Rotation correction algorithms effectively mitigated positional errors caused by film misalignment. Comparative analysis with commercial software yielded nearly identical results, validating the reliability of the method. Dwell‐time analysis demonstrated excellent linearity (R2≥0.999) over summation radii ranging from 150 to 400 dpi. Conclusions: This study presents a robust and fully automated quality assurance (QA) solution for HDR brachytherapy that simultaneously verifies sub‐millimeter‐level dwell‐position accuracy and temporal linearity. The integration of radiochromic film dosimetry with algorithmic image processing eliminates manual intervention and standardizes QA workflows, representing a substantial advancement in treatment safety and efficiency. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|