Dose calculation system for remotely supporting radiotherapy.

K Saito; E Kunieda; Y Narita; H Kimura; M Hirai; H M Deloar; K Kaneko; M Ozaki; T Fujisaki; A Myojoyama; H Saitoh

doi:10.1093/rpd/nci069

Home/Archive/PubMed

PubMed · 16604625

Dose calculation system for remotely supporting radiotherapy.

K Saito·E Kunieda·Y Narita·H Kimura·M Hirai·H M Deloar·K Kaneko·M Ozaki·T Fujisaki·A Myojoyama·H Saitoh

View original source ↗Export metadata ↓

Abstract

The dose calculation system IMAGINE is being developed keeping in mind remotely supporting external radiation therapy using photon beams. The system is expected to provide an accurate picture of the dose distribution in a patient body, using a Monte Carlo calculation that employs precise models of the patient body and irradiation head. The dose calculation will be performed utilising super-parallel computing at the dose calculation centre, which is equipped with the ITBL computer, and the calculated results will be transferred through a network. The system is intended to support the quality assurance of current, widely carried out radiotherapy and, further, to promote the prevalence of advanced radiotherapy. Prototypes of the modules constituting the system have already been constructed and used to obtain basic data that are necessary in order to decide on the concrete design of the system. The final system will be completed in 2007.

Explore related subjects

Body Burden Computer Communication Networks Computer Simulation Japan Models, Biological Monte Carlo Method Proton Therapy Radiometry Radiotherapy Dosage Radiotherapy Planning, Computer-Assisted Radiotherapy, Conformal Relative Biological Effectiveness Software Software Design Telemedicine Protons Evaluation Study Journal Article

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

K Saito, E Kunieda, Y Narita, H Kimura, M Hirai, H M Deloar, K Kaneko, M Ozaki, T Fujisaki, A Myojoyama, H Saitoh. 2005. Dose calculation system for remotely supporting radiotherapy.. https://doi.org/10.1093/rpd%2Fnci069

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2007

Patient dose measurements in diagnostic radiology procedures in Korea.

This study is the first nationwide investigation aimed at estimating the patient dose for radiographic examinations in Korea including gastrointestinal studies, computed tomography and mammography. The survey data from 161 hospitals and the dose data from 32 hospitals were analysed. The third quartile entrance surface dose, dose area product (DAP), weighted CT dose index (CTDIw) and mean glandular dose (MGD) were reported. All the estimated doses were less than the stated International Atomic Energy Agency (IAEA) reference levels for radiographic examinations. However, DAPs for the fluoroscopic examinations had higher dose values than the IAEA reference levels. In addition, the CTDIw and MGD were lower than the IAEA reference levels.

Body Burden↗

PubMed2007

The study of new calibration features in the Harshaw TLD system.

The Harshaw TLD system has three key calibration procedures: the Reader, the Dosemeter and the Algorithm. These functions must be properly calibrated for the system to achieve the optimum results. For the conventional reader and dosemeter calibration, Harshaw TLD recommends a pre-fade and a post-fade of 24-48 h when calibrating the system for LiF:Mg,Ti type dosemeter. It is also recommended that keeping the fade time consistent is important to maintain the quality of the system performance. In recent years, new calibration features have been introduced into the Harshaw TLD models 6600 and 8800 operating systems. These new features are Auto Calibration, Auto QC and Auto Blank, and they give the user the ability to set up the clear-expose-read process to be performed automatically in a sequence for each dosemeter. This saves processing time and keeps the fade time the same. However, since the fade time is near zero, will it affect the TLD system calibration factors? What should the user expect? This paper presents a study of the effect of Auto Calibration/Auto QC to the TLD operation.

Body Burden↗

PubMed2007

Proton and photon absorbed-dose conversion coefficients for embryo and foetus from top-down irradiation geometry.

Absorbed-dose conversion coefficients are calculated for the embryo of 8 weeks and the foetus of 3, 6 or 9 months when the mother's body is exposed to protons and photons from top-down (TOP) direction. It provides data sets in addition to other standard irradiation geometries published previously. The TOP-irradiation geometry is considered here, because high-energy particles are often peaked from the TOP direction onboard aircrafts. The results show that absorbed-doses from high-energy particles could be underestimated significantly if isotropic (ISO) irradiation geometry is assumed. For protons of 100 GeV, absorbed-doses from TOP irradiation are approximately 2.3-2.9 times higher than the doses from ISO irradiation for different foetal ages. For 10 GeV photons, foetal doses from TOP irradiation are approximately 6.8-12 times higher than the doses from ISO irradiation. The coefficients from TOP-irradiation geometry are given in wide energy ranges, from 100 MeV to 100 GeV for protons and from 50 keV to 10 GeV for photons. They can, therefore, be used in various applications whenever exposure from the TOP-irradiation direction is concerned.

Body Burden↗