TH-E-230A-01: Can Dose-Volume Parameters Be Replaced with GEUD in the Treatment Planning Process?

2006 ◽  
Vol 33 (6Part23) ◽  
pp. 2294-2294 ◽  
Author(s):  
V Clark ◽  
I El Naqa ◽  
A Hope ◽  
G Suneja ◽  
J Bradley ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Planning Process ◽  
Dose Volume

Capitalizing on the treatment planning process to enhance dental education

2021 ◽  
Author(s):  
Viyan S. Kadhium ◽  
Katherine Shin ◽  
Vidya Ramaswamy ◽  
Romesh P. Nalliah
Keyword(s):  
Treatment Planning ◽  
Planning Process ◽  
Dental Education

scholarly journals Treatment planning comparison of volumetric modulated arc therapy with Trilogy and Halcyon for bilateral breast cancer

2021 ◽  
Author(s):  
Tao Sun ◽  
Xiutong Lin ◽  
Guifang Zhang ◽  
Qingtao Qiu ◽  
Chengqiang Li ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Treatment Planning ◽  
Volumetric Modulated Arc Therapy ◽  
Bilateral Breast Cancer ◽  
Planning System ◽  
Skin Dose ◽  
Delivery Time ◽  
Dose Volume ◽  
Arc Therapy ◽  
The Mean

Abstract Background: The Halcyon is a new machine from the Varian company. The purpose of this study was to evaluate the dosimetry of the Halcyon in treatment of bilateral breast cancer with volumetric modulated arc therapy. Methods: On CT images of 10 patients with bilateral breast cancer, four Halcyon plans with different setup fields were generated, and dosimetric comparisons using Bonferroni’s multiple comparisons test were conducted among the four plans. Whole and partial arc plans on the Trilogy and the Halcyon, referred to as T-4arc, T-8arc, H-4arc and H-8arc, were designed. The prescription dose was 50 Gy in 2-Gy fractions. All plans were designed with the Eclipse version 15.5 treatment planning system. The dosimetric differences between whole and partial arc plans in the same accelerator were compared using the Mann-Whitney U test. The better Halcyon plan was selected for the further dosimetric comparison of the plan quality and delivery efficiency between the Trilogy and the Halcyon. Results:Halcyon plans with high‐quality megavoltage cone beam CT setup fields increased the Dmean, D2 and V107 of the planning target volume (PTV) and the V5 and Dmean of the heart, left ventricle (LV) and lungs compared with other Halcyon setup plans. The mean dose and low dose volume of the heart, lungs and liver were significantly decreased in T-8arc plans compared to T-4arc plans. In terms of the V5, V20, V30, V40 and Dmean of the heart, the V20, V30, V40 and Dmean of the LV, the V30, V40, Dmax and Dmean of the left anterior descending artery (LAD), and the V5 and V40 of lungs, H-8arc was significantly higher than H-4arc (p<0.05). Compared with the Trilogy’s plans, the Halcyon’s plans reduced the high-dose volume of the heart and LV but increased the mean dose of the heart. For the dose of the LAD and the V20 and V30 of lungs, there was no significant difference between the two accelerators. Compared with the Trilogy, plans on the Halcyon significantly increased the skin dose but also significantly reduced the delivery time. Conclusion: For the Halcyon, the whole-arc plans have more dosimetric advantages than partial-arc plans in bilateral breast cancer radiotherapy. Although the mean dose of the heart and the skin dose are increased, the doses of the cardiac substructure and other OARs are comparable to the Trilogy, and the delivery time is significantly reduced.

scholarly journals Dose-volume histogram and 3-D/CT treatment planning evaluation of patients with radiation pneumonitis

1992 ◽  
Vol 24 ◽  
pp. 173-174 ◽  
Author(s):  
M.K. Martel ◽  
R.K. Ten Haken ◽  
M.B. Hazuka ◽  
A.T. Turrisi ◽  
B.A. Fraass ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Radiation Pneumonitis ◽  
Dose Volume Histogram ◽  
Dose Volume

scholarly journals The role of PET-CT in radiotherapy planning of solid tumours

2015 ◽  
Vol 49 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Stasa Jelercic ◽  
Mirjana Rajer
Keyword(s):  
Treatment Planning ◽  
Planning Process ◽  
Diagnostic Procedures ◽  
Solid Tumours ◽  
Radiotherapy Planning ◽  
Radiotherapy Treatment Planning ◽  
Pet Ct ◽  
Target Volumes ◽  
Radiotherapy Treatment

AbstractBackground. PET-CT is becoming more and more important in various aspects of oncology. Until recently it was used mainly as part of diagnostic procedures and for evaluation of treatment results. With development of personalized radiotherapy, volumetric and radiobiological characteristics of individual tumour have become integrated in the multistep radiotherapy (RT) planning process. Standard anatomical imaging used to select and delineate RT target volumes can be enriched by the information on tumour biology gained by PET-CT. In this review we explore the current and possible future role of PET-CT in radiotherapy treatment planning. After general explanation, we assess its role in radiotherapy of those solid tumours for which PET-CT is being used most.Conclusions. In the nearby future PET-CT will be an integral part of the most radiotherapy treatment planning procedures in an every-day clinical practice. Apart from a clear role in radiation planning of lung cancer, with forthcoming clinical trials, we will get more evidence of the optimal use of PET-CT in radiotherapy planning of other solid tumours

Tree-based exploration of the optimization objectives for automatic cervical cancer IMRT treatment planning

2021 ◽  
pp. 20210214
Author(s):  
Hanlin Wang ◽  
Ruoxi Wang ◽  
Jiacheng Liu ◽  
Jian Zhang ◽  
Kaining Yao ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Spinal Cord ◽  
Femoral Head ◽  
Treatment Planning ◽  
Planning Process ◽  
Conformity Index ◽  
Plan Quality ◽  
The Mean ◽  
Automatic Treatment ◽  
Better Than

Objectives: To develop and evaluate a practical automatic treatment planning method for Intensity-Modulated Radiation Therapy (IMRT) in cervical cancer cases. Methods: A novel algorithm named as Optimization Objectives Tree Search Algorithm (OOTSA) was proposed to emulate the planning optimization process and achieve a progressively improving IMRT plan, based on the Eclipse Scripting Application Programming Interface (ESAPI). Thirty previously treated cervical cancer cases were selected from the clinical database and comparison was made between the OOTSA-generated plans and clinical treated plans and RapidPlan-based (RP) plans. Results: In clinical evaluation, compared with plan scores of the clinical plans and the RP plans, 22 and 26 of the OOTSA plans were considered as clinically improved in terms of plan quality, respectively. The average conformity index (CI) for the PTV in the OOTSA plans was 0.86 ± 0.01 (mean ± 1 standard deviation), better than those in the RP plans (0.83 ± 0.02) and the clinical plans (0.71 ± 0.11). Compared with the clinical plans, the mean doses of femoral head, rectum, spinal cord and right kidney in the OOTSA plans were reduced by 2.34 ± 2.87 Gy, 1.67 ± 2.10 Gy, 4.12 ± 6.44 Gy and 1.15 ± 2.67 Gy. Compared with the RP plans, the mean doses of femoral head, spinal cord, right kidney and small intestine in the OOTSA plans were reduced by 3.31 ± 1.55 Gy, 4.25 ± 3.69 Gy, 1.54 ± 2.23 Gy and 3.33 ± 1.91 Gy, respectively. In the OOTSA plans, the mean dose of bladder was slightly increased, with 2.33 ± 2.55 Gy (versus clinical plans) and 1.37 ± 1.74 Gy (versus RP plans). The average elapsed time of OOTSA and clinical planning were 59.2 ± 3.47 min and 76.53 ± 5.19 min. Conclusions: The plans created by OOTSA have been shown marginally better than the manual plans, especially in preserving OARs. In addition, the time of automatic treatment planning has shown a reduction compared to a manual planning process, and the variation of plan quality was greatly reduced. Although improvement on the algorithm is warranted, this proof-of-concept study has demonstrated that the proposed approach can be a practical solution for automatic planning. Advances in knowledge: The proposed method is novel in the emulation strategy of the physicists’ iterative operation during the planning process. Based on the existing optimizers, this method can be a simple yet effective solution for automated IMRT treatment planning.

Dose-Volume Constraints Based Inverse Treatment Planning For Optimizing the Delivery of Radiation Therapy

2020 ◽  
Vol 33 (03) ◽  
Author(s):  
Pushpendra Singh ◽  
◽  
Supriya Tripathi ◽  
Raunak Kumar Tamrakar ◽  
◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Treatment Planning ◽  
Inverse Treatment Planning ◽  
Inverse Treatment ◽  
Dose Volume
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