Clinical impact of using the deterministic patient dose calculation algorithm Acuros XB for lung stereotactic body radiation therapy.
Purpose. To evaluate the clinical impact of using the deterministic dose calculation algorithm, Acuros XB, for early stage lung cancer patients undergoing stereotactic body radiotherapy (SBRT). Material and methods. Seventy-seven stage I non-small cell lung cancer patients who underwent lung SBRT fr...
| Publicado en: | Acta Oncologica Vol. 53; no. 3; pp. 324 - 330 |
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| Autores principales: | , , , , , |
| Formato: | algorithm diagnostic images research tables/charts Journal Article |
| Publicado: |
Medical Journals Sweden AB
Mar2014
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| 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=104023280&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104023280 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 0284186X B84 jtl: Acta Oncologica issn: 0284186X maglogo: N pubinfo: dt: Mar2014 vid: 53 iid: 3 pid: 59195 pub: Medical Journals Sweden AB artinfo: ui: 104023280 94379314 10.3109/0284186X.2013.822552 NLM23957683 104023280 ppf: 324 ppct: 6 formats: tig: atl: Clinical impact of using the deterministic patient dose calculation algorithm Acuros XB for lung stereotactic body radiation therapy. aug: au: Liu, Hong-Wei Nugent, Zoann Clayton, Ravinder Dunscombe, Peter Lau, Harold Khan, Rao affil: Department of Radiation Oncology, Tom Baker Cancer Center, Calgary, University of Calgary, Alberta, Canada sug: subj: Treatment Outcomes Algorithms Radiation Dosage Methods Dosage Calculation Methods Lung Neoplasms Radiotherapy Parametric Statistics T-Tests Logistic Regression Human Univariate Statistics Multivariate Statistics Data Analysis Software Odds Ratio Confidence Intervals Descriptive Statistics ab: Purpose. To evaluate the clinical impact of using the deterministic dose calculation algorithm, Acuros XB, for early stage lung cancer patients undergoing stereotactic body radiotherapy (SBRT). Material and methods. Seventy-seven stage I non-small cell lung cancer patients who underwent lung SBRT from 2008 to 2012 at our center were included in this study. All treatment plans originally calculated by the anisotropic analytical algorithm (AAA) were recalculated using the AAA and Acuros XB algorithms with identical monitor units and beam arrangements. The dose, dose distribution, conformality number (CN) and heterogeneity index (HI) of the target were determined for each plan. A paired matched t-test was used to evaluate the difference between the mean dose, the dose distribution, and the CN and HI for the target. The importance of tumor (volume, location), patient (pulmonary functional, body mass index) and treatment (number of SBRT beams) on the dose distributions obtained from the two algorithms was statistically determined using linear regression analyses. Results. The mean target dose was same for both algorithms. Compared to AAA, a small and significant difference in dose distribution in the target was found for the Acuros XB algorithm, resulting in lower conformity (−2.1%, p < 0.0001) and higher heterogeneity (p < 0.0001) of dose. Single logistic regression identified pulmonary function, number of beams and target location as being correlated with the difference of CN between the two calculations. Multivariate analysis indicated that the patient's pulmonary function (p = 0.0296) was the only predictor for the difference in conformality between the two dose calculation algorithms. Conclusions. In lung SBRT, the patient's pulmonary function is responsible for the difference in target dose distribution between the Acuros XB and AAA algorithms. The Acuros XB algorithm could be used to advantage in patients with compromised pulmonary function based on its accurate modeling of lung tissue in comparison to AAA. pubtype: Academic Journal doctype: algorithm diagnostic images research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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