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AU2008100728A4 - A real time treatment dose verification system for afterloader brachytherapy systems - Google Patents

A real time treatment dose verification system for afterloader brachytherapy systems Download PDF

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Publication number
AU2008100728A4
AU2008100728A4 AU2008100728A AU2008100728A AU2008100728A4 AU 2008100728 A4 AU2008100728 A4 AU 2008100728A4 AU 2008100728 A AU2008100728 A AU 2008100728A AU 2008100728 A AU2008100728 A AU 2008100728A AU 2008100728 A4 AU2008100728 A4 AU 2008100728A4
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AU
Australia
Prior art keywords
afterloader
verification system
real time
treatment dose
time treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU2008100728A
Inventor
Ryan Lee Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RMIT University
Original Assignee
Royal Melbourne Institute of Technology Ltd
Melbourne Institute of Technology
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Filing date
Publication date
Application filed by Royal Melbourne Institute of Technology Ltd, Melbourne Institute of Technology filed Critical Royal Melbourne Institute of Technology Ltd
Priority to AU2008100728A priority Critical patent/AU2008100728A4/en
Application granted granted Critical
Publication of AU2008100728A4 publication Critical patent/AU2008100728A4/en
Assigned to ROYAL MELBOURNE INSTITUTE OF TECHNOLOGY reassignment ROYAL MELBOURNE INSTITUTE OF TECHNOLOGY Request for Assignment Assignors: SMITH, RYAN
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
    • A61N5/1027—Interstitial radiation therapy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
    • A61N5/1007—Arrangements or means for the introduction of sources into the body
    • A61N2005/1008—Apparatus for temporary insertion of sources, e.g. afterloaders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
    • A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
    • A61N2005/1072—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan taking into account movement of the target

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Radiation-Therapy Devices (AREA)

Description

19/08/2008 A real time treatment dose verification system for afterloader 0 brachytherapy systems 0 Specification Description The system consists of a two dimensional flat panel imaging device that is positioned o against the patient during the treatment. The flat panel imager is then linked to a control computer system that reads the data from the imager and compares the radiation measured to the planned patient treatment. See Figure 1 for system clarification.
00 The flat panel imager records the patient exit radiation dose at a known geometrical plane O from the brachytherapy implant, as a digital image. The flat panel imager is responsive to O the radiation x-ray energies of the radioactive isotope. For example, a common radiation OO isotope source is Iridium-192, which has a mean x-ray energy of 390kV. The imager will O also be responsive at x-ray energies of 120 to 140kV.
0 The geometrical location of the flat panel imager in relation to the patient is determined using an external kilovoltage x-ray system. The flat panel imager is positioned for treatment, then a kilovoltage image is taken through the patient, to record the flat panel imager and patient relationship. This image is fed to the process computer before brachytherapy treatment commences and the geometrical position is calculated.
As the treatment delivery proceeds, with the afterloader stepping the radioactive isotope source through each catheter, the image recorded by the flat panel imager is transferred to the control computer system where the measured image is subtracted from a planned image.
All measured and planned image comparisons will be made progressively as treatment is delivered at some pre determined time interval. An error threshold will be set, producing an error flag when the delivered dose differs by more than a critical amount from the planned dose. This error flay will notify the brachytherapy treatment operator to stop the treatment.
The data collected over the duration of the treatment will also provide a total delivered radiation dose record.
The dose recorded by the flat panel imager is patient exit dose. The process computer, as well as comparing planned and delivered exit dose, will also back project the exit dose through the patient, to the implant site, and provide measured radiation dose at any plane within the cancer site. The back projection method therefore provides a two dimension in-vivo dose verification system without any invasive procedure. This process can be applied to any part of the human body.
Ryan Smith, Copyright 2008 00 o Sy %tt ni plications O The Ivinr aI1) VU of the systen, is to roieabsol- ute rwatrnenr dose delivery verificalion, CI a x i e above.
;ZThe totl mei ured dlose recorded b~y thle verification system, saimn ed Over altreatment <1 Ira'tiolns 'ould 1be used to provide a true rdusec volt nw. histogram a ml1yss OThe fraction to traiin recorded delivered dose c-ould also be sed&L to assess.-- ny imipl~a inovei lent (such as in promi ILL Implants wheire needles movew ee frcin)and thenl 00 summl ed to providle a tot' &.-dlivered dose map.
17-The- svstein fian also 1b i tustel fr Ih. liYcis qwallit Za5suUIIR. proceduries. conninr SO~LM.T O ~~~posilioll, step size test ing and with a know n and calibrate d tat ae iainz ae o ~absolute dose: \'*ritif-arion cani be: donec.
00
AU2008100728A 2008-08-04 2008-08-04 A real time treatment dose verification system for afterloader brachytherapy systems Expired AU2008100728A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008100728A AU2008100728A4 (en) 2008-08-04 2008-08-04 A real time treatment dose verification system for afterloader brachytherapy systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2008100728A AU2008100728A4 (en) 2008-08-04 2008-08-04 A real time treatment dose verification system for afterloader brachytherapy systems

Publications (1)

Publication Number Publication Date
AU2008100728A4 true AU2008100728A4 (en) 2008-10-02

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AU2008100728A Expired AU2008100728A4 (en) 2008-08-04 2008-08-04 A real time treatment dose verification system for afterloader brachytherapy systems

Country Status (1)

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AU (1) AU2008100728A4 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012034157A1 (en) * 2010-09-13 2012-03-22 Rmit University Brachytherapy dose verification apparatus, system and method
CN106552325A (en) * 2015-09-25 2017-04-05 瓦里安医疗系统公司 Considering Radiation Dose Based on Imaging
EP4186562A1 (en) 2021-11-26 2023-05-31 Vilnius University System and method for brachytherapy procedure planning and verification

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012034157A1 (en) * 2010-09-13 2012-03-22 Rmit University Brachytherapy dose verification apparatus, system and method
US20130303902A1 (en) * 2010-09-13 2013-11-14 Rmit University Brachytherapy dose verification apparatus, system and method
AU2010360735B2 (en) * 2010-09-13 2016-02-18 Rmit University Brachytherapy dose verification apparatus, system and method
US9636523B2 (en) 2010-09-13 2017-05-02 Ryan Lee Smith Brachytherapy dose verification apparatus, system and method
CN106552325A (en) * 2015-09-25 2017-04-05 瓦里安医疗系统公司 Considering Radiation Dose Based on Imaging
EP4186562A1 (en) 2021-11-26 2023-05-31 Vilnius University System and method for brachytherapy procedure planning and verification

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Legal Events

Date Code Title Description
FGI Letters patent sealed or granted (innovation patent)
PC Assignment registered

Owner name: ROYAL MELBOURNE INSTITUTE OF TECHNOLOGY

Free format text: FORMER OWNER WAS: SMITH, RYAN

MK22 Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry