33 Clinical implementation of a quality assurance program in HDR brachytherapy by in vivo dosimetry with diodes

1996 ◽  
Vol 39 ◽  
pp. S9
Author(s):  
R. Alecu ◽  
J.J. Feldmeier ◽  
W.S. Court ◽  
M. Alecu ◽  
C.G. Orton
Keyword(s):  
Quality Assurance ◽  
In Vivo Dosimetry ◽  
Quality Assurance Program ◽  
Hdr Brachytherapy ◽  
Clinical Implementation

scholarly journals A clinical implementation of in vivo dosimetry with n-type Isorad semiconductor diodes

2014 ◽  
Vol 29 (4) ◽  
pp. 313-320
Author(s):  
Laza Rutonjski ◽  
Borislava Petrovic ◽  
Milutin Baucal ◽  
Milan Teodorovic ◽  
Ozren Cudic ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Mean Value ◽  
In Vivo Dosimetry ◽  
Quality Assurance Program ◽  
Clinical Implementation ◽  
Entrance Dose ◽  
Dose Measurements ◽  
Action Levels ◽  
Radiotherapy Treatment

The study was aimed to check the radiotherapy treatment accuracy and definition of action levels during implementation of in vivo dosimetry as a part of quality assurance program. The calibration and correction factors for in vivo entrance dose measurements for six n-type Isorad semiconductor diodes were determined as recommended by the European Society for Radiotherapy and Oncology Booklet No. 5. The patients for in vivo measurements have been divided in groups, according to the treatment site/techique, in order to investigate and detect the groups where the uncertainty was larger or where a systematic error occurred. The tolerance/action levels for all groups were also defined and checked. In this study, the entrance dose measurements were performed for total of 451 treatment fields, and 338 patients over one year period. The mean value and the standard deviation for different groups were: breast +1.0% ? 2.89%(1 SD), brain, and head and neck - +0.74% ? 2.04%(1 SD), and isocentric pelvis and abdomen - +0.1% ? 2.86%(1 SD). All measurements - +0.72% ? 2.64%(1 SD). In our experience, systematic in vivo dosimetry proved to be a very useful tool for quality assurance of patient's plan and treatment, both in detecting systematic errors and for estimating the accuracy of radiotherapy treatment delivery.

In vivo dosimetry as a part of quality assurance program for breast cancer irradiation

2014 ◽  
Vol 30 ◽  
pp. e75 ◽  
Author(s):  
Laza Rutonjski ◽  
Borislava Petrović ◽  
Milutin Baucal ◽  
Milan Teodorović ◽  
Ozren Čudić ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Quality Assurance ◽  
In Vivo Dosimetry ◽  
Quality Assurance Program ◽  
Cancer Irradiation

Image-guided in vivo dosimetry for quality assurance of IMRT treatment for prostate cancer

2007 ◽  
Vol 67 (1) ◽  
pp. 288-295 ◽  
Author(s):  
Hansjoerg Wertz ◽  
Judit Boda-Heggemann ◽  
Cornelia Walter ◽  
Barbara Dobler ◽  
Sabine Mai ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Quality Assurance ◽  
In Vivo Dosimetry ◽  
Image Guided

Implementation of an in vivo radiochromic film QA procedure

2016 ◽  
Author(s):  
◽  
Jason Stanford
Keyword(s):  
Quality Assurance ◽  
Radiation Treatment ◽  
Radiochromic Film ◽  
In Vivo Dosimetry ◽  
Patient Specific ◽  
Attractive Alternative ◽  
Quality Assurance Procedure ◽  
Imaging Device ◽  
Treatment Techniques

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Advance treatment techniques, such as IMRT and dynamic conformal arc delivery, are novel radiation treatment procedures at the forefront of accurate and precise radiotherapy. However, the risk of suboptimal treatment resulting in injury is far greater with these techniques due to their complexity. An in vivo quality assurance system is the most appropriate validation of the delivered dose to the patient from these techniques. The intent of this research is to propose an in vivo dosimetry quality assurance procedure using radiochromic film. This research proved that radiochromic in vivo dosimetry is a viable method of detecting spatial patient specific errors in radiotherapy; however, the process is time consuming and not sensitive enough for dosimetric errors associated with weight change. Although time consuming, in vivo radiochromic dosimetry is an attractive alternative for small cancer centers and developing countries without the large startup capital to acquire the electronic portal imaging device necessary for EPID in vivo dosimetry.

scholarly journals Three-dimensional printer-generated patient-specific phantom for artificial in vivo dosimetry in radiotherapy quality assurance

2017 ◽  
Vol 44 ◽  
pp. 205-211 ◽  
Author(s):  
Takeshi Kamomae ◽  
Hidetoshi Shimizu ◽  
Takayoshi Nakaya ◽  
Kuniyasu Okudaira ◽  
Takahiro Aoyama ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Three Dimensional ◽  
In Vivo Dosimetry ◽  
Patient Specific

A survey of in vivo diode dosimetry in the UK

1999 ◽  
Vol 1 (2) ◽  
pp. 73-82
Author(s):  
Robert Appleyard
Keyword(s):  
Quality Assurance ◽  
Central Axis ◽  
In Vivo Dosimetry ◽  
In Vivo Measurements ◽  
Radiotherapy Department ◽  
Critical Organ ◽  
Diode System ◽  
The Uk ◽  
Radiotherapy Physics

A clear rationale exists for routine in vivo dosimetry as part of an overall quality assurance (QA) programme within a radiotherapy department. A survey was undertaken in order to identify the extent of diode dosimetry practice within the UK.Questionnaires were distributed to 57 radiotherapy physics departments in the UK in order to determine the extent of central axis diode dosimetry and the protocols implemented, the range of other in vivo measurements performed using diodes and the type of equipment used. Fifty-four responses were received. Eighteen departments undertook some form of central axis entrance dosimetry. Fifteen departments could be considered to be doing this routinely. Seven departments indicated planned future use. Six centres routinely undertook exit dosimetry with a further 3 indicating planned future use. Varied protocols for use were reported by those centres undertaking central axis dosimetry. Thirty-two respondents used a diode system for other forms of in vivo measurements with critical organ and TBI dosimetry being the most common. The vast majority used Scanditronix equipment.Despite the distinct benefits of central axis diode dosimetry, this continues to be infrequently adopted as part of a departmental QA programme. However, an indication of a number of departments planning to implement such an approach is reassuring.

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