International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1398
3
1
gregorian
2019
6
1
17
3
online
1
fulltext
en
Quantitative measurements for entrance and exit radiation dose confirmation for cancer patients: An analysis of large cohort of patients
Radiation Biology
Radiation Biology
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: The success of radiation therapy depends on accurate dose delivery to the target. Diode in vivo measurement of entrance and exit dose is a valuable quality assurance (QA) tool to ensure accurate dose delivery. Materials and Methods: This study was performed at BINO Cancer Hospital, Bahawalpur. Entrance and exit dose measurements were done with p-type diode for various types of cancer patients treated on Co-60 teletherapy unit. These measurements were compared with calculated (planned) dose values. A total of 3285 radiation fields of 723 cancer patients of various sites were included in current investigation. Results: The action level was ± 3 % for current measurements. The average percentage variation between the expected and measured dose was 0.37 with standard deviation 2.08. It was observed that 87.49 % of measurements were within tolerance level. It was also noticed that all dose deliveries fell within ± 5 %. This study showed that exit/wedged/oblique dose measurements were harder than entrance/non wedged/normal incidence dose measurements and more standard deviation were observed for these measurements. Conclusion: The Quantitative entrance and exit absorbed dose verification for cancer patients is beneficial for quality improvement in radiation therapy. A great majority of measurements were found within the acceptable limit. Execution of entrance and exit dose measurement procedure had demonstrated to be very helpful for detecting potential mistakes and avoiding errors due to accurate positioning of patients.</div>
Cancer, dose verification, quality improvement, Co-60 teletherapy.
423
428
http://ijrr.com/browse.php?a_code=A-10-1-799&slc_lang=en&sid=1
M.A.
Gadhi
asghargadhi@gmail.com
7900319475328460014284
7900319475328460014284
Yes
The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
N.
Azeem
7900319475328460014285
7900319475328460014285
No
Institute of Chemistry, University of the Punjab, Lahore, Pakistan
A.
Azeem
7900319475328460014286
7900319475328460014286
No
Institute of Chemistry, University of the Punjab, Lahore, Pakistan
S.
Fatmi
7900319475328460014287
7900319475328460014287
No
Bahawalpur Institute of Nuclear Medicine and Oncology (BINO), Bahawalpur, Pakistan
A.
Nazir
7900319475328460014288
7900319475328460014288
No
Medical Physics Research Group, Department of Physics, The Islamia University of Bahawalpur, Pakistan
S.A.
Buzdar
7900319475328460014289
7900319475328460014289
No
Medical Physics Research Group, Department of Physics, The Islamia University of Bahawalpur, Pakistan