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Purpose: To compare brachytherapy to external beam radiation therapy (EBRT) with respect to overall survival (OS) and disease-specific survival (DSS) among NSCLC patients undergoing limited surgical resection., Methods: All cases of T1-4 N0 M0 NSCLC undergoing limited resection and either brachytherapy or EBRT diagnosed between 2004 and 2014 were extracted from the Surveillance, Epidemiology, and End Results database. Chi-square test and Fisher's exact analysis were used to analyze categorical variables while Student's t-test was used to analyze continuous variables. Univariate analysis to assess for differences in survival with respect to covariates was performed with the log-rank test. Multivariable analysis was performed with Cox proportional hazards regression models among the entire cohort and after sub-stratification by T stage., Results: Among 543 patients, 471 underwent EBRT and 72 underwent brachytherapy. Brachytherapy demonstrated improved OS and DSS on univariate analysis as compared to EBRT (p < 0.05). Cox regression also demonstrated improved OS and DSS with brachytherapy (HR 0.604; 95% CI [0.380; 0.961] and HR 0.524; 95% CI [0.303; 0.908], respectively). Sub-cohort analysis demonstrated significant improvement in survival only among patients with T1 disease with similar survival between brachytherapy and EBRT among higher stage disease., Conclusions: Patients undergoing brachytherapy for T1-T4, N0, M0 NSCLC demonstrated at least similar survival as compared to those undergoing EBRT among patients undergoing limited resection. Improved survival was demonstrated among patients with T1 disease.

Purpose: To characterize inventions and assess trends in brachytherapy innovation based on brachytherapy-related patents awarded across the past 2 decades and provide insights that will help inform future research and entrepreneurship in the field., Methods: The United States Patent and Trademark Office database was searched for patents awarded between 1999 and 2018 with a classification code corresponding to the broadest brachytherapy search category. Patent characteristics were stratified and compared by geographic location, affiliation, and theme of invention., Results: There were 202 brachytherapy-related patents awarded from 2009 to 2018, which indicates a 56% increase in patent productivity and brachytherapy innovation compared with the previous decade from 1999 to 2008. Patents had an industry affiliation in 83% of cases from 1999 to 2008 and in 76% of cases from 2009 to 2018. Meanwhile, academic participation in brachytherapy patent innovation rose from 4% to 11% in that time. The focus and theme of inventions evolved across time, with radiation sources being the most common theme from 1999 to 2008 and falling to third place in 2009-2018. Conversely, development of brachytherapy-related patents involving exogenous agents such as drug-conjugates, radiosensitizers, and adjuncts to treatment increased substantially in the subsequent decade. While no collaboration was observed between academia and industry between 1999 and 2008, notable partnerships emerged in the subsequent decade which amounted to almost 5% of all patents awarded between 2009 and 2018., Conclusions: There has been an increase in overall brachytherapy patent production over time, and this has been accompanied by a greater variety of distinct patent themes. Collaboration between industry and academia is rare. Knowledge of brachytherapy patents may inform future research innovation in this field., (Copyright © 2020 American Brachytherapy Society. Published by Elsevier Inc. All rights reserved.)

Purpose: Twitter may reflect attitudes underrepresented in traditional surveys. This study aimed to understand professionals' and patients' thoughts regarding brachytherapy on Twitter., Methods and Materials: Twitter was queried with "brachytherapy" to identify all tweets about patients' experiences from January 2012 to May 2017. A random sample of tweets by health care professionals containing "brachytherapy" was obtained using the first weekly tweet in the same interval. Consensus coding was used to categorize tweets as "patient" or "professional" based on content about receiving brachytherapy or self-identification as a health care professional. Tweets were analyzed for positive, neutral, or negative sentiment and recurrent themes using manual, iterative coding. Patient tweets were analyzed for whether they were shared before or after treatment and whether the patient, friends, or family had posted them. Professional tweets were analyzed to identify temporal theme changes., Results: One hundred sixty-two patient tweets and 260 professional tweets were obtained from January 2012 to May 2017. On average, 2.5 patient tweets were shared monthly compared to 69 for providers. Among tweets by patients and professionals, 57% vs. 12% expressed positive sentiment, 21% vs. 3% negative sentiment, and 22% vs. 85% neutral sentiment, respectively. The most common patient and professional codes were "general sharing of experience/casual conversation" (32%) and "science" (21%), respectively., Conclusions: Patients tweeted less about brachytherapy than professionals and generally expressed favorable and negative sentiments regarding their radiation treatment experiences. Professionals tended to express neutral sentiment and focus on research. Opportunities exist for greater radiation oncologist engagement in this medium., (Copyright © 2018 American Brachytherapy Society. Published by Elsevier Inc. All rights reserved.)