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Cilla S, Pistilli D, Romano C, Macchia G, Pierro A, Arcelli A, Buwenge M, Morganti AG, Deodato F. CT-based radiomics prediction of complete response after stereotactic body radiation therapy for patients with lung metastases. Strahlenther Onkol 2023:10.1007/s00066-023-02086-6. [PMID: 37256303 DOI: 10.1007/s00066-023-02086-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 04/11/2023] [Indexed: 06/01/2023]
Abstract
PURPOSE Stereotactic body radiotherapy (SBRT) is a key treatment modality for lung cancer patients. This study aims to develop a machine learning-based prediction model of complete response for lung oligometastatic cancer patients undergoing SBRT. MATERIALS AND METHODS CT images of 80 pulmonary oligometastases from 56 patients treated with SBRT were analyzed. The gross tumor volumes (GTV) were contoured on CT images. Patients that achieved complete response (CR) at 4 months were defined as responders. For each GTV, 107 radiomic features were extracted using the Pyradiomics software. The concordance correlation coefficients (CCC) between the region of interest (ROI)-based radiomics features obtained by the two segmentations were calculated. Pairwise feature interdependencies were evaluated using the Spearman rank correlation coefficient. The association of clinical variables and radiomics features with CR was evaluated with univariate logistic regression. Two supervised machine learning models, the logistic regression (LR) and the classification and regression tree analysis (CART), were trained to predict CR. The models were cross-validated using a five-fold cross-validation. The performance of models was assessed by receiver operating characteristic curve (ROC) and class-specific accuracy, precision, recall, and F1-measure evaluation metrics. RESULTS Complete response was associated with four radiomics features, namely the surface to volume ratio (SVR; p = 0.003), the skewness (Skew; p = 0.027), the correlation (Corr; p = 0.024), and the grey normalized level uniformity (GNLU; p = 0.015). No significant relationship between clinical parameters and CR was found. In the validation set, the developed LR and CART machine learning models had an accuracy, precision, and recall of 0.644 and 0.750, 0.644 and 0.651, and 0.635 and 0.754, respectively. The area under the curve for CR prediction was 0.707 and 0.753 for the LR and CART models, respectively. CONCLUSION This analysis demonstrates that radiomics features obtained from pretreatment CT could predict complete response of lung oligometastases following SBRT.
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Affiliation(s)
- Savino Cilla
- Gemelli Molise Hospital, Medical Physics Unit, Largo Gemelli 1, 86100, Campobasso, Italy.
| | - Domenico Pistilli
- Gemelli Molise Hospital, Medical Physics Unit, Largo Gemelli 1, 86100, Campobasso, Italy
| | - Carmela Romano
- Gemelli Molise Hospital, Medical Physics Unit, Largo Gemelli 1, 86100, Campobasso, Italy
| | | | - Antonio Pierro
- Radiology Unit, Gemelli Molise Hospital, Campobasso, Italy
| | - Alessandra Arcelli
- Radiation Oncology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Milly Buwenge
- Radiation Oncology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Alessio Giuseppe Morganti
- Radiation Oncology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Experimental, Diagnostic, and Specialty Medicine-DIMES, Alma Mater Studiorum, Università di Bologna, Diagnostic, Italy
| | - Francesco Deodato
- Radiation Oncology Unit, Gemelli Molise Hospital, Campobasso, Italy
- Istituto di Radiologia, Università Cattolica del Sacro Cuore, Roma, Italy
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Hayashi K, Suzuki O, Shiomi H, Ono H, Setoguchi A, Nakai M, Nakanishi E, Tatekawa S, Ose N, Hirata T, Tamari K, Seo Y, Funaki S, Isohashi F, Shimizu S, Shintani Y, Ogawa K. Stereotactic ablative body radiotherapy with a central high dose using CyberKnife for metastatic lung tumors. BMC Cancer 2023; 23:215. [PMID: 36882702 PMCID: PMC9990197 DOI: 10.1186/s12885-023-10635-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/13/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND The CyberKnife system features a robotically-positioned linear accelerator to deliver real-time image-guided stereotactic ablative body radiotherapy (SABR). It achieves steep dose gradients using irradiation from hundreds of different directions and increases the central dose of the gross tumor volume (GTV) without increasing the marginal dose to the planning target volume. We evaluated the effectiveness and safety of SABR with a central high dose using CyberKnife for metastatic lung tumors. METHODS A total of 73 patients with 112 metastatic lung tumors treated with CyberKnife were retrospectively analyzed. Local control, progression-free survival, and overall survival were calculated using the Kaplan-Meier method. The median age was 69.2 years. The most common primary sites were the uterus (n = 34), colorectum (n = 24), head and neck (n = 17), and esophagus (n = 16). For peripheral lung tumors, the median radiation dose was 52 Gy in 4 fractions, whereas for centrally located lung tumors, it was 60 Gy in 8-10 fractions. The dose prescription was defined as 99% of the solid tumor components of the GTV. The median maximum dose within the GTV was 61.0 Gy. The GTV and planning target volume were enclosed conformally by the 80% and 70% isodose lines of the maximum dose, respectively. The median follow-up period was extended to 24.7 months; it was 33.0 months for survivors. RESULTS The 2-year local control, progression-free survival, and overall survival rates were 89.1%, 37.1%, and 71.3%, respectively. Toxicities of grade ≥ 2 were noted as grade 2 and 3 radiation pneumonitis in one patient each. The two patients with grade 2 or higher radiation pneumonitis had both received simultaneous irradiation at two or three metastatic lung tumor sites. No toxicity of grade ≥ 2 was observed in patients with metastasis in one lung only. CONCLUSIONS SABR with a central high dose using CyberKnife for metastatic lung tumors is effective with acceptable toxicity. TRIAL REGISTRATION Number: 20557, Name: Stereotactic ablative radiotherapy using CyberKnife for metastatic lung tumor, URL: http://www.radonc.med.osaka-u.ac.jp/pdf/SBRT.pdf , Date of registration: April 1, 2021 (retrospectively registered), Date of enrollment: May 1, 2014.
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Affiliation(s)
- Kazuhiko Hayashi
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan.
| | | | - Hiroya Shiomi
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Hitoshi Ono
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Akira Setoguchi
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Masataka Nakai
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Erina Nakanishi
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Shotaro Tatekawa
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Naoko Ose
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takero Hirata
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Keisuke Tamari
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Yuji Seo
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Soichiro Funaki
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fumiaki Isohashi
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Shinichi Shimizu
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
| | - Yasushi Shintani
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-Oka, Suita, Osaka, Japan
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Le Reun E, Casutt A, Durham A, Bouchaab H, Romano E, Lovis A, Krueger T, Von Garnier C, Özsahin EM, Kinj R. Lung stereotactic radiation therapy: Intercomparison of irradiation devices in terms of outcome and predictive factors. Cancer Radiother 2023; 27:31-41. [PMID: 35965243 DOI: 10.1016/j.canrad.2022.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/07/2022] [Accepted: 05/17/2022] [Indexed: 02/06/2023]
Abstract
PURPOSE To compare three different radiotherapy devices able to perform pulmonary stereotactic radiotherapy: CyberKnife® (CK), Helical Tomotherapy® (HT), and volumetric modulated arc therapy (VMAT). This study aims to define the patients' outcome in terms of SBRT efficacy and toxicities depending of the device choice. MATERIALS AND METHODS We retrospectively analyzed the clinical, radiological, and dosimetric data of patients treated with lung SBRT between 2016 and 2020 at Lausanne University Hospital, using the Chi2 test for proportions, the t-test for means comparisons, the Kaplan-Meier method for survival, and the Log-rank test and Cox-regression for intergroups comparisons. RESULTS We identified 111 patients treated by either CK (59.9%), VMAT (38.0%), or HT (2.1%). Compared to other techniques, CK treated comparable gross tumor volume (GTV; 2.1 vs. 1.4cm3, P=0.84) with smaller planning treatment volume (PTV; 12.3 vs. 21.9cm3, P=0.013) and lower V5 (13.5 vs. 19.9cm3, P=0.002). Local control rates at 2years were not different whatever the irradiation device, respectively of 96.2% (range, 90.8-100) and 98.1% (range, 94.4-100), P=0.68. Toxicity incidence significantly increased with V5 value>17.2% (56.0 vs. 77.4%, P=0.021). CONCLUSION Compared to other SBRT techniques, CK treatments permitted to treat comparable GTV with reduced PTV and V5. Toxicity incidence was less frequent when reducing the V5. CK is particularly attractive in case of multiple courses of lung SBRT or lung reirradiation.
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Affiliation(s)
- E Le Reun
- Department of Radiation Oncology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Institut national de la santé et de la recherche médicale (Inserm), U1296 Research Unit « Radiations: Defense, Health and Environment », centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - A Casutt
- Division of Pulmonology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Lausanne University (UNIL), Lausanne, Switzerland
| | - A Durham
- Department of Radiation Oncology, University Hospital of Genève (HUG), rue Gabrielle-Perret-Gentil, 1205 Genève, Switzerland
| | - H Bouchaab
- Department of Medical Oncology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - E Romano
- Department of Radiation Oncology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - A Lovis
- Division of Pulmonology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Lausanne University (UNIL), Lausanne, Switzerland
| | - T Krueger
- Department of Thoracic Surgery, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - C Von Garnier
- Division of Pulmonology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Lausanne University (UNIL), Lausanne, Switzerland
| | - E M Özsahin
- Department of Radiation Oncology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - R Kinj
- Department of Radiation Oncology, University Hospital Center of Lausanne (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland.
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CT radiomic predictors of local relapse after SBRT for lung oligometastases from colorectal cancer: a single institute pilot study. Strahlenther Onkol 2022; 199:477-484. [PMID: 36580087 DOI: 10.1007/s00066-022-02034-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/20/2022] [Indexed: 12/30/2022]
Abstract
OBJECTIVES To assess the potential of radiomic features (RFs) extracted from simulation computed tomography (CT) images in discriminating local progression (LP) after stereotactic body radiotherapy (SBRT) in the management of lung oligometastases (LOM) from colorectal cancer (CRC). MATERIALS AND METHODS Thirty-eight patients with 70 LOM treated with SBRT were analyzed. The largest LOM was considered as most representative for each patient and was manually delineated by two blinded radiation oncologists. In all, 141 RFs were extracted from both contours according to IBSI (International Biomarker Standardization Initiative) recommendations. Based on the agreement between the two observers, 134/141 RFs were found to be robust against delineation (intraclass correlation coefficient [ICC] > 0.80); independent RFs were then assessed by Spearman correlation coefficients. The association between RFs and LP was assessed with Mann-Whitney test and univariate logistic regression (ULR): the discriminative power of the most informative RF was quantified by receiver-operating characteristics (ROC) analysis through area under curve (AUC). RESULTS In all, 15/38 patients presented LP. Median time to progression was 14.6 months (range 2.4-66 months); 5/141 RFs were significantly associated to LP at ULR analysis (p < 0.05); among them, 4 RFs were selected as robust and independent: Statistical_Variance (AUC = 0.75, p = 0.002), Statistical_Range (AUC = 0.72, p = 0.013), Grey Level Size Zone Matrix (GLSZM) _zoneSizeNonUniformity (AUC = 0.70, p = 0.022), Grey Level Dependence Zone Matrix (GLDZM) _zoneDistanceEntropy (AUC = 0.70, p = 0.026). Importantly, the RF with the best performance (Statisical_Variance) is simply representative of density heterogeneity within LOM. CONCLUSION Four RFs extracted from planning CT were significantly associated with LP of LOM from CRC treated with SBRT. Results encourage further research on a larger population aiming to define a usable radiomic score combining the most predictive RFs and, possibly, additional clinical features.
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Colin G, Ben Mustapha S, Jansen N, Coucke P, Seidel L, Berkovic P, Janvary L. Interval From Simulation Imaging to Treatment Delivery in SABR of Lung Lesions: How Long is Too Long for the Lung? Adv Radiat Oncol 2022; 8:101132. [PMID: 36845615 PMCID: PMC9943770 DOI: 10.1016/j.adro.2022.101132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/18/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose The purpose of this study was to evaluate the effect of delay between planning computed tomography (CT) used as a basis for treatment planning and the start of treatment (delay planning treatment [DPT]), on local control (LC) for lung lesions treated by SABR. Methods and Materials We pooled 2 databases from 2 monocentric retrospective analysis previously published and added planning CT and positron emission tomography (PET)-CT dates. We analyzed LC outcomes based on DPT and reviewed all available cofounding factors among demographic data and treatment parameters. Results A total of 210 patients with 257 lung lesions treated with SABR were evaluated. The median DPT was 14 days. Initial analysis revealed a discrepancy in LC as a function of DPT and a cutoff delay of 24 days (21 days for PET-CT almost systematically done 3 days after planning CT) was determined according to the Youden method. Cox model was applied to several predictors of local recurrence-free survival (LRFS). Univariate analysis showed LRFS decreasing significantly related to DPT ≥24 days (P = .0063), gross tumor volume, and clinical target volume (P = .0001 and P = .0022), but also with the presence of >1 lesion treated with the same planning CT (P = .024). LRFS increased significantly with higher biological effective dose (P < .0001). On multivariate analysis, LRFS remained significantly lower for lesions with DPT ≥24 days (hazard ratio, 2.113; 95% confidence interval, 1.097-4.795; P = .027). Conclusions DPT to SABR treatment delivery for lung lesions appears to reduce local control. Timing from imaging acquisition to treatment delivery should be systematically reported and tested in future studies. Our experience suggests that the time from planning imaging to treatment should be <21 days.
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Affiliation(s)
- Gilles Colin
- Department of Radiation Oncology, University Hospital of Liège, Liège, Belgium,Corresponding author: Gilles Colin, MD
| | - Selma Ben Mustapha
- Department of Radiation Oncology, University Hospital of Liège, Liège, Belgium
| | - Nicolas Jansen
- Department of Radiation Oncology, University Hospital of Liège, Liège, Belgium
| | - Philippe Coucke
- Department of Radiation Oncology, University Hospital of Liège, Liège, Belgium
| | - Laurence Seidel
- Department of Biostatistics, University Hospital of Liège, Liège, Belgium
| | - Patrick Berkovic
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium
| | - Levente Janvary
- Department of Radiation Oncology, National Institute of Oncology, Budapest, Hungary
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Virbel G, Cox DG, Olland A, Falcoz PE, Le Fevre C, Schott R, Antoni D, Noel G. Outcome of lung oligometastatic patients treated with stereotactic body irradiation. Front Oncol 2022; 12:945189. [PMID: 36003767 PMCID: PMC9393880 DOI: 10.3389/fonc.2022.945189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/27/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose The oligometastatic stage is an intermediate stage of cancer between the localized stage and polymetastatic stage. The prognosis of patients in this stage also appears to be intermediate. Lung stereotactic body radiotherapy is a possible tool for treating oligometastatic lung sites. The objective of our study was to evaluate the clinical outcomes in terms of local control, progression-free survival, overall survival, and toxicity of SBRT in oligometastatic patients with lung metastases from any solid primary tumor. Materials and methods Clinical records of consecutive lung oligometastatic patients treated between January 2010 and December 2020 for lung SBRT at 60 Gy in 3- or 8-fraction schedules and a controlled primary tumor were retrospectively analyzed. Results After a median follow-up of 20.3 months, local failure occurred for 14 lesions, 57 patients experienced lung progression, and 64 patients experienced disease progression. Overall survival rates at 1 and 2 years were 85.6 and 69.7%, respectively. Fifty-two patients experienced radiation pneumonitis, but only 2 patients were symptomatic and presented grade 2 late pneumonitis. No grade 3-4 toxicity was observed. ECOG 0 was the only prognostic factor for overall survival (HR = 3.5; 95% CI 3.2-3.8; p < 0.01). Conclusion SBRT with a 60-Gy schedule in 8 fractions is an effective and well-tolerated treatment for patients with lung oligometastases from any solid primary tumor.
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Affiliation(s)
- Guillaume Virbel
- Department of Radiation Oncology, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - David G. Cox
- IRFAC – Statistic Department, INSERM U1113, Strasbourg, France
- Research and Development in Precision Medicine, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - Anne Olland
- Department of Thoracic Surgery, Nouvel Hôpital Civil, Strasbourg University Hospital, Strasbourg, France
| | - Pierre-Emmanuel Falcoz
- Department of Thoracic Surgery, Nouvel Hôpital Civil, Strasbourg University Hospital, Strasbourg, France
| | - Clara Le Fevre
- Department of Radiation Oncology, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - Roland Schott
- Department of Medical Oncology, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - Delphine Antoni
- Department of Radiation Oncology, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - Georges Noel
- Department of Radiation Oncology, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
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Ku KM, Lam B, Wu VWC, Chan KT, Chan CYY, Cheng HC, Yuen KMY, Cai J. Clinical Evaluation of Fiducial Marker Pre-Planning for Virtual Bronchoscopic Navigation Implantation in Lung Tumour Patients Treated With CyberKnife. Front Oncol 2022; 12:860641. [PMID: 35785178 PMCID: PMC9246503 DOI: 10.3389/fonc.2022.860641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 05/13/2022] [Indexed: 11/20/2022] Open
Abstract
Purpose For the treatment of invisible lung tumours with CyberKnife (CK), fiducial markers (FMs) were implanted as an internal surrogate under virtual bronchoscopic navigation (VBN). This research aims to study the benefits of introducing an additional procedure in assigning the optimal FM positions using a pre-procedure planning system and performing virtual simulation before implantation. The objectives were 1) to reduce the duration of the FM implantation procedure, 2) to reduce the radiation exposure in dose area product (DAP) (dGy*cm2) to patients, and 3) to increase the number of FMs implanted around the tumour. Methods and Materials This study is retrospective, single-centre, and observational in nature. A total of 32 patients were divided into two groups. In Group 1, 18 patients underwent conventional VBN FM implantation. In Group 2, 14 patients underwent additional pre-procedure planning and simulation. The steps of pre-procedure planning include 1) importing CT images into the treatment planning system (Eclipse, Varian Medical Systems, Inc.) and delineating five to six FMs in their ideal virtual positions and 2) copying the FM configuration into VBN planning software (LungPoint Bronchus Medical, Inc.) for verification and simulation. Finally, the verified FMs were deployed through VBN with the guidance of the LungPoint planning software. Results A total of 162 FMs were implanted among 35 lesions in 32 patients aged from 37 to 92 (median = 66; 16 men and 16 women). Results showed that 1) the average FM insertion time was shortened from 41 min (SD = 2.05) to 23 min (SD = 1.25), p = 0.00; 2) the average absorbed dose of patients in DAP was decreased from 67.4 cGy*cm2 (SD = 14.48) to 25.3 cGy*cm2 (SD = 3.82), p = 0.01 (1-tailed); and 3) the average number of FMs implanted around the tumour was increased from 4.7 (SD = 0.84) to 5.6 (SD = 0.76), p = 0.00 (1-tailed). Conclusion Pre-procedure planning reduces the FM implantation duration from 41.1 to 22.9 min, reduces the radiation exposure in DAP from 67.4 to 25.3 dGy*cm2, and increases the number of FMs inserted around the tumour from 4.7 to 5.6.
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Affiliation(s)
- Ki Man Ku
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong SAR, China
- Hong Kong Radiation Therapy Company Limited, Hong Kong, Hong Kong SAR, China
| | - Bing Lam
- Respiratory Medicine Centre, Hong Kong Sanatorium and Hospital, Hong Kong, Hong Kong SAR, China
| | - Vincent W. C. Wu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong SAR, China
| | - Kwok Ting Chan
- Department of Radiotherapy, Hong Kong Sanatorium and Hospital, Hong Kong, Hong Kong SAR, China
| | - Chloe Y. Y. Chan
- Department of Radiotherapy, Hong Kong Sanatorium and Hospital, Hong Kong, Hong Kong SAR, China
| | - H. C. Cheng
- Hong Kong Medical Physics Consulting Company Limited, Hong Kong, Hong Kong SAR, China
| | - Kamy M. Y. Yuen
- Hong Kong Radiation Therapy Company Limited, Hong Kong, Hong Kong SAR, China
| | - Jing Cai
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong SAR, China
- Research Institute for Smart Aging, The Hong Kong Polytechnic University, Hong Kong, Hong Kong SAR, China
- *Correspondence: Jing Cai,
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Lucia F, Geier M, Schick U, Bourbonne V. Narrative Review of Synergistics Effects of Combining Immunotherapy and Stereotactic Radiation Therapy. Biomedicines 2022; 10:biomedicines10061414. [PMID: 35740435 PMCID: PMC9219862 DOI: 10.3390/biomedicines10061414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/02/2022] [Accepted: 06/13/2022] [Indexed: 12/24/2022] Open
Abstract
Stereotactic radiotherapy (SRT) has become an attractive treatment modality in full bloom in recent years by presenting itself as a safe, noninvasive alternative to surgery to control primary or secondary malignancies. Although the focus has been on local tumor control as the therapeutic goal of stereotactic radiotherapy, rare but intriguing observations of abscopal (or out-of-field) effects have highlighted the exciting possibility of activating antitumor immunity using high-dose radiation. Furthermore, immunotherapy has revolutionized the treatment of several types of cancers in recent years. However, resistance to immunotherapy often develops. These observations have led researchers to combine immunotherapy with SRT in an attempt to improve outcomes. The benefits of this combination would come from the stimulation and suppression of various immune pathways. Thus, in this review, we will first discuss the immunomodulation induced by SRT with the promising results of preclinical studies on the changes in the immune balance observed after SRT. Then, we will discuss the opportunities and risks of the combination of SRT and immunotherapy with the preclinical and clinical data available in the literature. Furthermore, we will see that many perspectives are conceivable to potentiate the synergistic effects of this combination with the need for prospective studies to confirm the encouraging data.
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Affiliation(s)
- François Lucia
- Radiation Oncology Department, University Hospital, 29200 Brest, France; (U.S.); (V.B.)
- LaTIM, INSERM, UMR 1101, University of Brest, 29200 Brest, France
- Correspondence:
| | - Margaux Geier
- Medical Oncology Department, University Hospital, 29200 Brest, France;
| | - Ulrike Schick
- Radiation Oncology Department, University Hospital, 29200 Brest, France; (U.S.); (V.B.)
- LaTIM, INSERM, UMR 1101, University of Brest, 29200 Brest, France
| | - Vincent Bourbonne
- Radiation Oncology Department, University Hospital, 29200 Brest, France; (U.S.); (V.B.)
- LaTIM, INSERM, UMR 1101, University of Brest, 29200 Brest, France
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