Comparison of Elekta VMAT with helical tomotherapy and fixed field IMRT: Plan quality, delivery efficiency and accuracy

2010 ◽  
Vol 37 (3) ◽  
pp. 1350-1359 ◽  
Author(s):  
Min Rao ◽  
Wensha Yang ◽  
Fan Chen ◽  
Ke Sheng ◽  
Jinsong Ye ◽  
...  
Keyword(s):  
Helical Tomotherapy ◽  
Imrt Plan ◽  
Plan Quality ◽  
Fixed Field ◽  
Delivery Efficiency

Helical tomotherapy for advanced esophageal cancer improves target conformity and homogeneity: A comparison with fixed-field intensity-modulated radiotherapy

2015 ◽  
Vol 11 (3) ◽  
pp. 3146-3155
Author(s):  
Luhua Wang
Keyword(s):  
Esophageal Cancer ◽  
Field Intensity ◽  
Helical Tomotherapy ◽  
Intensity Modulated Radiotherapy ◽  
Matched Pair ◽  
Conformity Index ◽  
Target Coverage ◽  
Advanced Esophageal Cancer ◽  
Fixed Field ◽  
Intensity Modulated

Purpose: To evaluate the usefulness of helical tomotherapy (HT) in the treatment of advanced esophageal cancer (EC) and compare target homogeneity, conformity and normal tissue doses between HT and fixed-field intensity-modulated radiotherapy (ff-IMRT).Methods: In all, 23 patients with cT3-4N0-1M0-1a thoracic EC (upper esophagus, 9 patients; middle esophagus, 6; distal esophagus, 6 and esophagogastric junction, 2) who were treated with ff-IMRT (60 Gy in 30 fractions) were re-planned for HT and ff-IMRT with the same clinical require­ments. Comparisons were performed using the Wilcoxon matched-pair signed-rank test.Results: Compared with ff-IMRT, HT significantly reduced the homogeneity index for thoracic, upper, middle and distal ECs by 38%, 31%, 36% and 33%, respectively (P < 0.05). The conformity index was increased by HT for thoracic, upper and middle ECs by 9%, 9% and 18%, respectively (P < 0.05). Target coverage was improved by 1% with HT (P < 0.05). The mean lung dose was significantly reduced by HT for thoracic and upper ECs (P < 0.05). The V20 (volume receiving at least 20 Gy) and higher dose volumes of the lungs were decreased by HT in all cases, but the differences were significant for thoracic, upper and distal ECs (P < 0.05), with reductions of 2.1%, 3.1% and 2.2%, respectively. HT resulted in a larger lung V5 for thoracic, upper, middle and distal ECs, with increases of 3.5%, 1.5%, 7.2% and 3.2%, respectively. Heart sparing was significantly better with HT than with ff-IMRT in terms of the V30 and V40 for thoracic, upper, middle and distal ECs (P < 0.05).Conclusions: Compared to ff-IMRT, HT provides superior target coverage, conformity and homogeneity, with reduced the volume of high doses to the lungs and heart for advanced EC. HT may be a treatment option for advanced EC, especially upper EC.

SU-FF-T-415: The Use of Advanced Imaging Techniques for Improvement in IMRT Plan Homogeneity and Delivery Efficiency

2007 ◽  
Vol 34 (6Part14) ◽  
pp. 2497-2497
Author(s):  
R Price ◽  
E Fourkal ◽  
J Li ◽  
K Paskalev ◽  
Y Chen ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Imrt Plan ◽  
Advanced Imaging ◽  
Delivery Efficiency

MO-D-BRB-01: Study of Systemic and Random Errors On VMAT and IMRT Plan Quality and Deliver Accuracy

2009 ◽  
Vol 36 (6Part20) ◽  
pp. 2692-2692
Author(s):  
F Chen ◽  
M Rao ◽  
J Ye ◽  
S Luan ◽  
D Shepard ◽  
...  
Keyword(s):  
Random Errors ◽  
Imrt Plan ◽  
Plan Quality

SU-E-T-638: Influence of Dose Rate On Step and Shoot IMRT Plan Quality and Deliverability

2013 ◽  
Vol 40 (6Part21) ◽  
pp. 352-353
Author(s):  
S Sharma ◽  
D Manigandan ◽  
A Biswas ◽  
B Mohanty ◽  
V Subramani ◽  
...  
Keyword(s):  
Dose Rate ◽  
Imrt Plan ◽  
Plan Quality ◽  
Step And Shoot

SU-E-T-720: Maintaining Prostate IMRT Plan Quality Using the Fraction of Rectum Overlapping the PTV

2013 ◽  
Vol 40 (6Part22) ◽  
pp. 372-372
Author(s):  
T Hwang ◽  
S Kang ◽  
T Suh
Keyword(s):  
Imrt Plan ◽  
Plan Quality

SU-E-T-492: Influence of Clipping PTV in Build-Up Region On IMRT Plan Quality and Deliverability

2015 ◽  
Vol 42 (6Part20) ◽  
pp. 3447-3448
Author(s):  
S Sharma ◽  
D Manigandan ◽  
P Sahai ◽  
A Biswas ◽  
V Subramani ◽  
...  
Keyword(s):  
Imrt Plan ◽  
Plan Quality

scholarly journals EP-1207: Influence of dose rate on dynamic IMRT plan quality and deliverability

2013 ◽  
Vol 106 ◽  
pp. S457
Author(s):  
S. Sharma ◽  
M. Durai ◽  
V. Subramani ◽  
B. Manoj ◽  
S. Aman ◽  
...  
Keyword(s):  
Dose Rate ◽  
Imrt Plan ◽  
Plan Quality

scholarly journals The Dosimetric and Clinical Comparison between Helical Tomotherapy and Fixed-Field Intensity-Modulated Radiotherapy in Radical Irradiation for Cervical Cancer

2020 ◽  
Author(s):  
Mingfang Guo ◽  
Xueqi Ran ◽  
Dongling Zou ◽  
Na Zhang ◽  
Xianfeng Liu
Keyword(s):  
Cervical Cancer ◽  
Field Intensity ◽  
Helical Tomotherapy ◽  
Organs At Risk ◽  
Intensity Modulated Radiotherapy ◽  
Conformity Index ◽  
Radical Radiotherapy ◽  
Fixed Field ◽  
Intensity Modulated ◽  
Clinical Complications

Abstract Backgroud: To evaluate the dosimetric parameters, clinical complications, and efficacy of helical tomotherapy(HT) and fixed-field intensity-modulated radiotherapy (f-IMRT) in radical radiotherapy for cervical cancer.Methods: Between November 2016 and December 2018, 77 cervical cancer patients in radical irradiation were enrolled, 38 patients undergoing treatment with HT and 39 with f-IMRT. The dosimetry parameters, clinical complications, and efficacy were compared. Results: The HT plans had superior homogeneity index(HI) , conformity index(CI) (P=0.000),and resulted in a reduction in the dosimetry parameters of organs at risk(OARs) (P<0.05) except the V10 of small intestine (P=0.682).The incidence of myelosuppression showed no significant differences(P=0.265).The patients with HT had no radioactive cystitis, grade 2 or above rectal complication and acute bladder complication. The complete remission(CR) rates ,effective rates(CR+PR) and local control rates of two years were 81.58%,100% and 97.37%.Conclusion: The HT plans showed advantages in dosimetry, and provided more superior clinical outcomes.

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