Quality assurance of inhomogeneity correction algorithm in the intensity modulated radiotherapy and dynamic conformal arc radiotherapy using multiple heterogeneous head and neck phantoms

Dongho Shin, Myonggeun Yoon, Sung Yong Park, Suk Lee, Sang Hoon Lee, Hyun Do Huh, Dae Yong Kim, Kwan Ho Cho, Dong Ho Shin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To quantify the differences between heterogeneous dose estimates from the calculation algorithm of 3-D treatment planning systems and dosimetry measurements, radiation was delivered in accordance with IMRT and dynamic conformal arc radiotherapy (DCART) QC procedures using multiple heterogeneous head & neck phantoms. The multiple inhomogeneous head and neck phantoms were constructed by various materials such as water equivalent homogeneous (acryl), air equivalent (cavity), bone equivalent (teflon) materials. The absolute and relative dosimetry were done using pinpoint ionization chamber, film and TLD (Harshaw 100). With custom-written software modules, the measured and calculated dose distributions were superimposed and compared. The point dose measured at the interface between water and air material region shows about 7% mismatch with the treatment planning system in IMRT. This dose difference is even increased at the interface between bone and water material region reaches up to 18% under-dose comparative to planned value. Our results suggest that the effectiveness of the imhomogeneity corrections used in IMRT and DCART planning should be evaluated in order to ensure meaningful quality assurance and delivery.

Original languageEnglish
Title of host publicationIFMBE Proceedings
PublisherSpringer Verlag
Pages1867-1870
Number of pages4
Volume14
Edition1
Publication statusPublished - 2007
Event10th World Congress on Medical Physics and Biomedical Engineering, WC 2006 - Seoul, Korea, Republic of
Duration: 2006 Aug 272006 Sep 1

Other

Other10th World Congress on Medical Physics and Biomedical Engineering, WC 2006
CountryKorea, Republic of
CitySeoul
Period06/8/2706/9/1

Fingerprint

Radiotherapy
Quality assurance
Planning
Dosimetry
Water
Bone
Ionization chambers
Polytetrafluoroethylene
Air
Polytetrafluoroethylenes
Radiation

Keywords

  • Conformal dynamic arc radiotherapy
  • Head and neck phantom
  • Inhomogeniety

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

Cite this

Shin, D., Yoon, M., Park, S. Y., Lee, S., Lee, S. H., Huh, H. D., ... Shin, D. H. (2007). Quality assurance of inhomogeneity correction algorithm in the intensity modulated radiotherapy and dynamic conformal arc radiotherapy using multiple heterogeneous head and neck phantoms. In IFMBE Proceedings (1 ed., Vol. 14, pp. 1867-1870). Springer Verlag.

Quality assurance of inhomogeneity correction algorithm in the intensity modulated radiotherapy and dynamic conformal arc radiotherapy using multiple heterogeneous head and neck phantoms. / Shin, Dongho; Yoon, Myonggeun; Park, Sung Yong; Lee, Suk; Lee, Sang Hoon; Huh, Hyun Do; Kim, Dae Yong; Cho, Kwan Ho; Shin, Dong Ho.

IFMBE Proceedings. Vol. 14 1. ed. Springer Verlag, 2007. p. 1867-1870.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shin, D, Yoon, M, Park, SY, Lee, S, Lee, SH, Huh, HD, Kim, DY, Cho, KH & Shin, DH 2007, Quality assurance of inhomogeneity correction algorithm in the intensity modulated radiotherapy and dynamic conformal arc radiotherapy using multiple heterogeneous head and neck phantoms. in IFMBE Proceedings. 1 edn, vol. 14, Springer Verlag, pp. 1867-1870, 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006, Seoul, Korea, Republic of, 06/8/27.
Shin, Dongho ; Yoon, Myonggeun ; Park, Sung Yong ; Lee, Suk ; Lee, Sang Hoon ; Huh, Hyun Do ; Kim, Dae Yong ; Cho, Kwan Ho ; Shin, Dong Ho. / Quality assurance of inhomogeneity correction algorithm in the intensity modulated radiotherapy and dynamic conformal arc radiotherapy using multiple heterogeneous head and neck phantoms. IFMBE Proceedings. Vol. 14 1. ed. Springer Verlag, 2007. pp. 1867-1870
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