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Publicaciones científicas más recientes (desde 2010)

Autores: Martin-Martin, G., (Autor de correspondencia); Aguilar Redondo, P. B.; Barbes, B; et al.
Revista: PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
ISSN 1724-191X  Vol. 67  2019  págs. 176 - 184
Purpose: To investigate ion recombination correction and polarity effects in four ion chamber models in flattening-filter-free (FFF) beams to (1) evaluate their suitability for reference dosimetry; (2) assess the accuracy of the two-voltage technique (TVA) against the Bruggmoser formalism; and (3) examine the influence of the accelerator type on the recombination correction. Methods: Jaffe plots were created for a variety of microchambers, small-volume and Farmer-type chambers to obtain k(s), the recombination correction factor, using two different types of accelerators. These values were plotted against dose-per-pulse and Jaffe plots for opposite polarities were created to determine which chambers meet the AAPM TG-51 addendum recombination and polarity specifications. Results: Nearly all small-volume chambers exhibited reference-class behavior with respect to ion recombination and polarity effects. The microchambers exhibited anomalous recombination and polarity effects, precluding their use for reference dosimetry in FFF beams. For the reference-class chambers, agreement between TVA-determined k(s) values and Jaffe and Bruggmoser formalisms-determined k(s) values was within 0.1%. No significant differences were found between the k(s) values obtained with the two different accelerators used in this work. Conclusions: This study stresses the need to characterize ion recombination correction and polarity effects for small-volume chambers and microchambers on an individual..
Autores: Prieto, Elena; Aguilar Redondo, P. B.; Morán, Verónica; et al.
Revista: EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
ISSN 1619-7070  Vol. 46  Nº SUPPL 1  2019  págs. S838 - S838
Autores: Marti-Climent, JM; Prieto, Elena; Aguilar Redondo, P. B.; et al.
Revista: EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
ISSN 1619-7070  Vol. 46  Nº SUPPL 1  2019  págs. S772 - S772
Autores: Morán, Verónica; Aguilar Redondo, P. B.; Prieto, Elena; et al.
Revista: EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
ISSN 1619-7070  Vol. 46  Nº SUPPL 1  2019  págs. S830 - S830
Autores: Martin-Martin, G.; Aguilar Redondo, P. B.; Barbes, B; et al.
Revista: RADIOTHERAPY AND ONCOLOGY
ISSN 0167-8140  Vol. 127  Nº Supl.1  2018  págs. S461 - S462
Autores: Prieto, Elena; Aguilar Redondo, P. B.; Morán, Verónica; et al.
Revista: EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
ISSN 1619-7070  Vol. 45  Nº Supl. 1  2018  págs. S312 - S313
Autores: Azorin, J.F.P.; Aguilar Redondo, P. B.; et al.
Revista: PHYSICS IN MEDICINE AND BIOLOGY
ISSN 0031-9155  Vol. 62  Nº 18  2017  págs. N417 - N427
In this study, we present a new procedure for the comparison of two dose matrices by means of a statistical test. A statistical distance is proposed to decide whether the difference between the two matrices is statistically significant. This statistical test is based on the square difference between the experimental and expected gamma matrix results. The expected gamma matrix is calculated by simulating the measurement process. For comparison purposes, the significance level of the test was chosen to give the same statistical significance as 90% of gamma-pass rate. The performance of the statistical distance is checked against 53 VMAT. The power of the presented test was compared using simulations with the 90% gamma-pass rate criteria for two cases in which intentional errors are introduced. In both cases, the test is uniformly more powerful. According to the test, two of the measured plans have a significant difference with calculated matrices, although the gamma pass rate measured was always greater than 90%.

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