Influence of Volumetric Change and Tumor Motion on Inter- and Intrafractional Positional Variations in Frameless Stereotactic Body Radiation Therapy (SBRT) of Lung Tumors

2012 ◽  
Vol 84 (3) ◽  
pp. S814
Author(s):  
J.M. Schuster ◽  
M. Myers ◽  
M. Rosu ◽  
N.D. Mukhopadhyay ◽  
E. Weiss
Keyword(s):  
Radiation Therapy ◽  
Stereotactic Body Radiation Therapy ◽  
Lung Tumors ◽  
Tumor Motion ◽  
Volumetric Change ◽  
Stereotactic Body Radiation

scholarly journals Exceeding Radiation Dose to Volume Parameters for the Proximal Airways with Stereotactic Body Radiation Therapy Is More Likely for Ultracentral Lung Tumors and Associated with Worse Outcome

Cancers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 3463
Author(s):  
Mark Farrugia ◽  
Sung Jun Ma ◽  
Mark Hennon ◽  
Chukwumere Nwogu ◽  
Elisabeth Dexter ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Propensity Score ◽  
Stereotactic Body Radiation Therapy ◽  
Performance Status ◽  
Bronchial Tree ◽  
Lung Tumors ◽  
Gender Performance ◽  
Dose Fractionation ◽  
Stereotactic Body Radiation ◽  
History Of

The preferred radiotherapeutic approach for central (CLT) and ultracentral (UCLT) lung tumors is unclear. We assessed the toxicity and outcomes of patients with CLT and UCLT who underwent definitive five-fraction stereotactic body radiation therapy (SBRT). We reviewed the charts of patients with either CLT or UCLT managed with SBRT from June 2010–April 2019. CLT were defined as gross tumor volume (GTV) within 2 cm of either the proximal bronchial tree, trachea, mediastinum, aorta, or spinal cord. UCLT were defined as GTV abutting any of these structures. Propensity score matching was performed for gender, performance status, and history of prior lung cancer. Within this cohort of 83 patients, 43 (51.8%) patients had UCLT. The median patient age was 73.1 years with a median follow up of 29.9 months. The two most common dose fractionation schemes were 5000 cGy (44.6%) and 5500 cGy (42.2%) in five fractions. Multivariate analysis revealed UCLT to be associated with worse overall survival (OS) (HR = 1.9, p = 0.02) but not time to progression (TTP). Using propensity score match pairing, UCLT correlated with reduced non-cancer associated survival (p = 0.049) and OS (p = 0.03), but not TTP. Within the matched cohort, dosimetric study found exceeding a D4cc of 18 Gy to either the proximal bronchus (HR = 3.9, p = 0.007) or trachea (HR = 4.0, p = 0.02) was correlated with worse non-cancer associated survival. In patients undergoing five fraction SBRT, UCLT location was associated with worse non-cancer associated survival and OS, which could be secondary to excessive D4cc dose to the proximal airways.

scholarly journals Analysis of pneumonitis and esophageal injury after stereotactic body radiation therapy for ultra-central lung tumors

Lung Cancer ◽  
2020 ◽  
Vol 147 ◽  
pp. 45-48
Author(s):  
Chunyu Wang ◽  
Andreas Rimner ◽  
Daphna Y. Gelblum ◽  
Rosalind Dick-Godfrey ◽  
Dominique McKnight ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Stereotactic Body Radiation Therapy ◽  
Lung Tumors ◽  
Esophageal Injury ◽  
Stereotactic Body Radiation
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