-
Pak J Nucl Med. 2017; 7(1): 20-27

Behaviour of wedges for different field sizes and depths

Authors: Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi.

View PDF DOI: 10.24911/PJNMed.7.4

Abstract

Background: The relative dosimetry plays vital part in treatment planning of patients. Factors such as percent depth doses, tissue maximum ratios, tray factors, wedge factors, etc., determined from the relative dosimetry, affects the patient dose. The current study intended at measuring and evaluating the wedge factor for different field sizes and depths for 60Co teletherapy unit GWXJ80 of NPIC China. Methods: The measurements for 15o, 30o, 45o and 60o wedges for different field sizes and depths on 60Co teletherapy unit GWXJ80 of NPIC China installed at Nuclear Institute of Medicine and Radiotherapy (NIMRA), Jamshoro, Pakistan, were done in water phantom of 30x30x30 cm3 dimension at 80 cm Source-to-Surface Distance (SSD) by using calibrated Farmerís NE 2570 electrometer with NE 2571 0.6 cc ionization chamber. Results: The evaluation of data showed that there was no significant difference in factor of each of wedge being analyzed for different field sizes and depths. Conclusion: The current study suggests that wedge factor for a particular wedge is approximately a constant value irrespective of field size and depth. The measurement for only one field size at one depth is sufficient to calculate the wedge factor for a particular wedge.

Keywords:   60Co, Quality assurance, Relative dosimetry, Field size, Depth.


Request permissions

If you wish to reuse any part or all of this article please contact the copyright holder, contact@pjnmed.com.

Copyright © 2020 Discover STM Publishing. All Rights Reserved.

Behaviour of wedges for different field sizes and depths


Authors
Sajjad Ahmed Memon
Nuclear Institute of Medicine And Radiotherapy (NIMRA), Jamshoro, Pakistan
PubMed articlesGoogle scholar articles

Naeem Ahmed Laghari
Nuclear Institute of Medicine And Radiotherapy (NIMRA), Jamshoro, Pakistan
PubMed articlesGoogle scholar articles

Fayaz Hussain Mangi
Nuclear Institute of Medicine And Radiotherapy (NIMRA), Jamshoro, Pakistan
PubMed articlesGoogle scholar articles


Correspondence to:
. Nuclear Institute of Medicine And Radiotherapy (NIMRA), Jamshoro, Pakistan;

Publication history
Published in print 24 Jun 2018
Export to EndNote Export to refMan

How to cite this article

Pubmed Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. Behaviour of wedges for different field sizes and depths. Pak J Nucl Med. 2017; 7(1): 20-27. doi:10.24911/PJNMed.7.4


Web Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. Behaviour of wedges for different field sizes and depths. http://www.pjnmed.com/?mno=302234 [Access: April 08, 2020]. doi:10.24911/PJNMed.7.4


AMA (American Medical Association) Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. Behaviour of wedges for different field sizes and depths. Pak J Nucl Med. 2017; 7(1): 20-27. doi:10.24911/PJNMed.7.4


Vancouver/ICMJE Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. Behaviour of wedges for different field sizes and depths. Pak J Nucl Med. (2017), [cited April 08, 2020]; 7(1): 20-27. doi:10.24911/PJNMed.7.4


Harvard Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi (2017) Behaviour of wedges for different field sizes and depths. Pak J Nucl Med, 7 (1), 20-27. doi:10.24911/PJNMed.7.4


Turabian Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. 2017. Behaviour of wedges for different field sizes and depths. Pakistan Journal of Nuclear Medicine, 7 (1), 20-27. doi:10.24911/PJNMed.7.4


Chicago Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. "Behaviour of wedges for different field sizes and depths." Pakistan Journal of Nuclear Medicine 7 (2017), 20-27. doi:10.24911/PJNMed.7.4


MLA (The Modern Language Association) Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi. "Behaviour of wedges for different field sizes and depths." Pakistan Journal of Nuclear Medicine 7.1 (2017), 20-27. Print. doi:10.24911/PJNMed.7.4


APA (American Psychological Association) Style

Sajjad Ahmed Memon, Naeem Ahmed Laghari, Fayaz Hussain Mangi (2017) Behaviour of wedges for different field sizes and depths. Pakistan Journal of Nuclear Medicine, 7 (1), 20-27. doi:10.24911/PJNMed.7.4


Click the icon of the social media platform on which you would like to share this article.

Viewed: 6397
Downloaded: 423