the comparison 2d and 3d treatment planning in breast cancer radiotherapy with emphasis on dose homogeneity and lung dose

Authors

zahra falahatpour m.sc. graduate of medical radiation, nuclear engineering dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran

seyed mahmood reza aghamiri associate professor, nuclear engineering dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran

robab anbiaee assistant professor, radiotherapy and oncology dept., emam hossein hospital, shahid beheshti university, tehran, iran

abstract

introduction: breast conserving radiotherapy is one of the most common procedures performed in any radiation oncology department. a tangential parallel-opposed pair is usually used for this purpose. this technique is performed using 2d or 3d treatment planning systems. the aim of this study was to compare 2d treatment planning with 3d treatment planning in tangential irradiation in breast conserving radiotherapy. in this comparison, homogeneity of isodoses in the breast volume and lung dose were considered. material and methods: twenty patients with breast cancer treated with conservative surgery were included in this study. the patients were ct scanned. two-dimensional treatment planning with the alfard 2d tps was performed for each patient using a single central ct slice. the data used on the alfard 2d tps was imported into the eclipse 3d tps, on which 3d treatment planning was performed. cobalt-60 beams were used in all plans. results: comparing 2d and 3d treatment planning, homogeneity of isodoses was improved in 3d treatment planning (p<0.02). volume of lung receiving a dose of >30gy was increased in 3d treatment planning (p< 0.01). discussion and conclusion: 3d treatment planning is a more suitable option for patients with breast cancer treated with conservative surgery because of improved dose homogeneity in 3d treatment planning. the results of the treatment can be improved with reduced recurrence probability and skin problems.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

The Comparison 2D and 3D Treatment Planning in Breast Cancer Radiotherapy with Emphasis on Dose Homogeneity and Lung Dose

Introduction: Breast conserving radiotherapy is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is usually used for this purpose. This technique is performed using 2D or 3D treatment planning systems. The aim of this study was to compare 2D treatment planning with 3D treatment planning in tangential irradiation in breast conse...

full text

Dose-volume Analysis of Heart and Lung during 3D planning of Tangential Breast Cancer Irradiation

Background: Breast cancer is becoming more frequently diagnosed at early stages with improved long term outcomes. Radiation-related heart disease and lung cancer can occur following radiotherapy for breast cancer. The aim of this study was to evaluate some dosimetric parameters of heart and lung during whole breast radiotherapy. Methods:Twenty five consecutive...

full text

Dose-volume Analysis of Heart and Lung during 3D Planning of Tangential Breast Cancer Irradiation

Introduction: Breast cancer is becoming more frequently diagnosed at early stages with improved long-term outcomes. Radiation-related heart disease and lung cancer can occur following radiotherapy for breast cancer. The aim of this study was to evaluate some dosimetric parameters of heart and lung during whole breast radiotherapy. Materials and Methods: Twenty...

full text

Comparison and Evaluation of the Effects of Rib and Lung Inhomogeneities on Lung Dose in Breast Brachytherapy using a Treatment Planning System and the MCNPX Code

Introduction: This study investigates to what extent the computed dose received by lung tissue in a commercially available treatment planning system (TPS) for 192Ir high-dose-rate breast brachytherapy is accurate in view of tissue inhomogeneities and presence of ribs. Materials and Methods: A CT scan of the breast was used to construct a patient-equivalent phantom in the clinical treatment plan...

full text

The comparison of dose distribution of different 3D conformal and conventional radiotherapy plans for gastric cancer

Aims: It was aimed to investigate postoperative conformal radiotherapy planning that provides the best target volume and the least dose for critical organs in cancers of stomach. Methods: This study was conducted on the CT simulation images of thirty patients diagnosed with gastric cancer. Target volumes and the organs at risk were contoured. AP-PA reciprocal parallel field conventional plan an...

full text

A comparison of contralateral breast dose due to breast cancer radiotherapy using two different treatment machines in a radiotherapy center

Background: The radiation dose received by contralateral breast (CLB) is one of the concerns of breast radiotherapy, because it may lead to the induction of secondary breast cancer. The aim of this study was to evaluate the CLB surface dose in the breast treatment in Yazd radiotherapy center. Materials and Methods: The surface dose of CLB was measured using TLD dosimetry in 50 cancer breast pat...

full text

My Resources

Save resource for easier access later


Journal title:
iranian journal of medical physics

جلد ۷، شماره ۳، صفحات ۴۷-۵۴

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023