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Khaledi N, Karshafian R, Taggar AS, Alrabiah K, Khan R, Gräfe JL. RBE-based dose planning, and calculation of TCP and NTCP with gold nanoparticles for intermediate photon energy in pancreatic cancer. Phys Med Biol 2024; 69:175006. [PMID: 39074499 DOI: 10.1088/1361-6560/ad68be] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 07/29/2024] [Indexed: 07/31/2024]
Abstract
Objective.This study simulated the potential of gold nanoparticles (GNPs) to improve the effectiveness of radiation therapy in pancreatic cancer cases. The purpose of this study was to assess the impact of GNPs on tumor control probability (TCP) and normal tissue complication probability (NTCP) in pancreatic cancer cases undergoing radiation therapy. The work aimed to compare treatment plans generated with a novel 2.5 MV beam using GNPs to conventional 6 MV plans and evaluate the dose-volume histogram (DVH), TCP, and NTCP.Approach.Treatment planning for five pancreatic computed tomography (CT) images was performed using the open-source MATLAB-based treatment planning program matRad. MATLAB codes were developed to calculate the relative biological effectiveness (RBE) of GNPs and apply the corresponding dose and RBE values to each voxel. TCP and NTCP were calculated based on the applied RBE values.Main results.Adding GNPs to the 2.5 MV treatment plan resulted in a significant increase in TCP, from around 59% to 93.5%, indicating that the inclusion of GNPs improved the effectiveness of the radiation treatment. The range in NTCP without GNPs was relatively larger compared to that with GNPs.Significance.The results indicated that the addition of GNPs to a 2.5 MV plan can increase TCP while maintaining a relatively low NTCP value (<1%). The use of GNPs may also reduce NTCP values by decreasing the dose to normal tissues while maintaining the same prescribed dose to the tumor. Hence, the addition of GNPs can improve the balance between TCP and NTCP.
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Affiliation(s)
- Navid Khaledi
- Department of Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
- Department of Medical Physics, CancerCare Manitoba, Winnipeg, MB, Canada
| | - Raffi Karshafian
- Department of Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Toronto Metropolitan University and St. Michael's Hospital, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
- Keenan Research Centre for Biomedical Science, Unity Health Toronto, 209 Victoria Street, Toronto, ON M5B 1W8, Canada
| | - Amandeep S Taggar
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, ON, Canada
| | - Khalid Alrabiah
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, ON, Canada
| | - Rao Khan
- Department of Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
- Department of Physics and Astronomy, Howard University, Washington, District of Columbia, United States of America
| | - James L Gräfe
- Department of Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
- Cancer Care Program, Dr H. Bliss Murphy Cancer Center, 300 Prince Philip Drive, St. John's, NL A1B 3V6, Canada
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Shi S, Li X, Zhang Y, Huang H, Liu J, Zhang J, Wang Z, Niu H, Zhang Y, Mei Q. Ultrathin and Biodegradable Bismuth Oxycarbonate Nanosheets with Massive Oxygen Vacancies for Highly Efficient Tumor Therapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307974. [PMID: 38431930 DOI: 10.1002/smll.202307974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/21/2024] [Indexed: 03/05/2024]
Abstract
Nanomaterials doped with high atom number elements can improve the efficacy of cancer radiotherapy, but their clinical application faces obstacles, such as being difficult to degrade in vivo, or still requiring relatively high radiation dose. In this work, a bismuth oxycarbonate-based ultrathin nanosheet with the thickness of 2.8 nm for safe and efficient tumor radiotherapy under low dose of X-ray irradiation is proposed. The high oxygen content (62.5% at%) and selective exposure of the facets of ultrathin 2D nanostrusctures facilitate the escape of large amounts of oxygen atoms on bismuth nanosheets from surface, forming massive oxygen vacancies and generating reactive oxygen species that explode under the action of X-rays. Moreover, the exposure of almost all atoms to environmental factors and the nature of oxycarbonates makes the nanosheets easily degrade into biocompatible species. In vivo studies demonstrate that nanosheets could induce apoptosis in cancer cells after low dose of X-ray irradiation without causing any damage to the liver or kidney. The tumor growth inhibition effect of radiotherapy increases from 49.88% to 90.76% with the help of bismuth oxycarbonate nanosheets. This work offers a promising future for nanosheet-based clinical radiotherapies of malignant cancers.
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Affiliation(s)
- Shuzhi Shi
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
- Department of Medical Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Xin Li
- School of Medicine, Institute of Laboratory Animal Sciences, Jinan University, Guangzhou, 510632, China
| | - Yi Zhang
- Department of Medical Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Haiyan Huang
- Department of Critical Care Medicine, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Jinliang Liu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Jing Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Zhigang Wang
- Department of Critical Care Medicine, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Haitao Niu
- School of Medicine, Institute of Laboratory Animal Sciences, Jinan University, Guangzhou, 510632, China
| | - Yong Zhang
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Qingsong Mei
- Department of Medical Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, Guangdong, 510632, China
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Gill GS, Hunt B, Zhang R, Williams BB, Zaki BI. Initial Observation of Contrast Profiles for 2-Dimensional and 3-Dimensional Magnetic Resonance Imaging Sequences in Magnetic Resonance-Guided Radiation Therapy for Locally Advanced Pancreatic Cancer. Adv Radiat Oncol 2024; 9:101314. [PMID: 38260228 PMCID: PMC10801635 DOI: 10.1016/j.adro.2023.101314] [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: 04/05/2023] [Accepted: 07/03/2023] [Indexed: 01/24/2024] Open
Abstract
Purpose In our experience treating locally advanced pancreatic cancer with magnetic resonance-guided radiation therapy (MRgRT), the true-fast imaging with steady-state free precession sequences used to generate both the real-time 2-dimensional (2D) magnetic resonance images (MRI; 2D cine) and the pretreatment high-resolution 3-dimensional (3D) MRI impart differing intensities for relevant structures between the 2 scans. Since these variations can confound target tracking selection, we propose that an understanding of the differing contrast profiles could improve selection of tracking structures. Methods and Materials We retrospectively reviewed both 2D cine and 3D MRI images for 20 patients with pancreatic cancer treated with MRgRT. At simulation, an appropriate tracking target was identified and contoured on a single 3-mm sagittal slice of the 3D MRI. This sagittal slice was directly compared with the coregistered 7-mm 2D cine to identify structures with notable discrepancies in signal intensity. The 3D MRI was then explored in additional planes to confirm structure identities. For quantitative verification of the clinically observed differences, the pixel intensity distributions of 2D cine and 3D MRI digital imaging and communications in medicine data sets were statistically compared. Results In all patients reviewed, arteries (aorta, celiac, superior mesenteric artery, hepatic artery) appeared mildly hyperintense on both scans. However, veins (portal vein, superior mesenteric vein) appeared hyperintense on 2D cine but isointense on 3D MRI. Biliary structures appeared mildly hyperintense on 2D cine but starkly hyperintense on 3D MRI. The pixel intensity distributions extracted from 2D cine and 3D MRI images were confirmed to differ significantly (2 sample Kolmogorov-Smirnov test; test statistic, 0.40; P < .001). Conclusions There are significant variations in image intensity between the immediate pretreatment 2D cine compared with the initial planning 3D MRI. Understanding variations of image intensity between the different MRI sequences used in MRgRT is valuable to radiation oncologists and may lead to improved target tracking and optimized treatment delivery.
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Affiliation(s)
- Gobind S. Gill
- Dartmouth Cancer Center, One Medical Center Drive, Lebanon, New Hampshire
| | - Brady Hunt
- Dartmouth Cancer Center, One Medical Center Drive, Lebanon, New Hampshire
| | - Rongxiao Zhang
- Dartmouth Cancer Center, One Medical Center Drive, Lebanon, New Hampshire
| | | | - Bassem I. Zaki
- Dartmouth Cancer Center, One Medical Center Drive, Lebanon, New Hampshire
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Comito T, Massaro M, Teriaca MA, Franzese C, Franceschini D, Navarria P, Clerici E, Di Cristina L, Bertolini A, Tomatis S, Reggiori G, Bresolin A, Bozzarelli S, Rimassa L, Bonifacio C, Carrara S, Santoro A, Zerbi A, Scorsetti M. Can STEreotactic Body Radiation Therapy (SBRT) Improve the Prognosis of Unresectable Locally Advanced Pancreatic Cancer? Long-Term Clinical Outcomes, Toxicity and Prognostic Factors on 142 Patients (STEP Study). Curr Oncol 2023; 30:7073-7088. [PMID: 37504373 PMCID: PMC10378012 DOI: 10.3390/curroncol30070513] [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: 05/31/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 07/29/2023] Open
Abstract
AIM The gold standard of care for pancreatic adenocarcinoma is the integrated treatment of surgery and chemotherapy (ChT), but about 50% of patients present with unresectable disease. Our study evaluated the efficacy in terms of local control, survival and safety of stereotactic body radiation therapy (SBRT) in locally advanced pancreatic cancer (LAPC). METHODS A retrospective study (STEP study) analyzed patients with LAPC treated with a dose of 45 Gy in 6 fractions. Local control (LC), distant progression free survival (DPFS), overall survival (OS) and toxicity were analyzed according to the Kaplan-Meier method. RESULTS A total of 142 patients were evaluated. Seventy-six patients (53.5%) received induction ChT before SBRT. The median follow-up was 11 months. One-, 2- and 3-year LC rate was 81.9%, 69.1% and 58.5%. Median DPFS was 6.03 months; 1- and 2-year DPFS rate was 19.9% and 4.5%. Median OS was 11.6 months and 1-, 2- and 3-year OS rates were 45.4%, 16.1%, and 9.8%. At univariate analysis, performed by the log-rank test, age < 70 years (p = 0.037), pre-SBRT ChT (p = 0.004) and post-SBRT ChT (p = 0.019) were associated with better OS. No patients experienced G3 toxicity. CONCLUSION SBRT represents an effective and safe therapeutic option in the multimodal treatment of patients with LAPC in terms of increased LC. When SBRT was sequentially integrated with ChT, the treatment proved to be promising in terms of OS as well.
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Affiliation(s)
- Tiziana Comito
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Maria Massaro
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Maria Ausilia Teriaca
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Ciro Franzese
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
| | - Davide Franceschini
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Pierina Navarria
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Elena Clerici
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Luciana Di Cristina
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Anna Bertolini
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Stefano Tomatis
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Giacomo Reggiori
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Andrea Bresolin
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Silvia Bozzarelli
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Lorenza Rimassa
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Cristiana Bonifacio
- Department of Radiology, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Silvia Carrara
- Department of Gastroenterology, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Armando Santoro
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Alessandro Zerbi
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
- Department of Pancreatic Surgery, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Marta Scorsetti
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
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Rhee DJ, Beddar S, Jaoude JA, Sawakuchi G, Martin R, Perles L, Yu C, He Y, Court LE, Ludmir EB, Koong AC, Das P, Koay EJ, Taniguichi C, Niedzielski JS. Dose Escalation for Pancreas SBRT: Potential and Limitations of using Daily Online Adaptive Radiation Therapy and an Iterative Isotoxicity Automated Planning Approach. Adv Radiat Oncol 2023; 8:101164. [PMID: 36798731 PMCID: PMC9926193 DOI: 10.1016/j.adro.2022.101164] [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: 11/29/2022] [Accepted: 12/23/2022] [Indexed: 02/05/2023] Open
Abstract
Purpose To determine the dosimetric limitations of daily online adaptive pancreas stereotactic body radiation treatment by using an automated dose escalation approach. Methods and Materials We collected 108 planning and daily computed tomography (CT) scans from 18 patients (18 patients × 6 CT scans) who received 5-fraction pancreas stereotactic body radiation treatment at MD Anderson Cancer Center. Dose metrics from the original non-dose-escalated clinical plan (non-DE), the dose-escalated plan created on the original planning CT (DE-ORI), and the dose-escalated plan created on daily adaptive radiation therapy CT (DE-ART) were analyzed. We developed a dose-escalation planning algorithm within the radiation treatment planning system to automate the dose-escalation planning process for efficiency and consistency. In this algorithm, the prescription dose of the dose-escalation plan was escalated before violating any organ-at-risk (OAR) dose constraint. Dose metrics for 3 targets (gross target volume [GTV], tumor vessel interface [TVI], and dose-escalated planning target volume [DE-PTV]) and 9 OARs (duodenum, large bowel, small bowel, stomach, spinal cord, kidneys, liver, and skin) for the 3 plans were compared. Furthermore, we evaluated the effectiveness of the online adaptive dose-escalation planning process by quantifying the effect of the interfractional dose distribution variations among the DE-ART plans. Results The median D95% dose to the GTV/TVI/DE-PTV was 33.1/36.2/32.4 Gy, 48.5/50.9/40.4 Gy, and 53.7/58.2/44.8 Gy for non-DE, DE-ORI, and DE-ART, respectively. Most OAR dose constraints were not violated for the non-DE and DE-ART plans, while OAR constraints were violated for the majority of the DE-ORI patients due to interfractional motion and lack of adaptation. The maximum difference per fraction in D95%, due to interfractional motion, was 2.5 ± 2.7 Gy, 3.0 ± 2.9 Gy, and 2.0 ± 1.8 Gy for the TVI, GTV, and DE-PTV, respectively. Conclusions Most patients require daily adaptation of the radiation planning process to maximally escalate delivered dose to the pancreatic tumor without exceeding OAR constraints. Using our automated approach, patients can receive higher target dose than standard of care without violating OAR constraints.
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Affiliation(s)
- Dong Joo Rhee
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sam Beddar
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Joseph Abi Jaoude
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gabriel Sawakuchi
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Rachael Martin
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Luis Perles
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cenji Yu
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
| | - Yulun He
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
| | - Laurence E. Court
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ethan B. Ludmir
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Albert C. Koong
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Prajnan Das
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Eugene J. Koay
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cullen Taniguichi
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Joshua S. Niedzielski
- Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Corresponding author: Joshua S. Niedzielski, PhD
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Lee HI, Kang HC, Chie EK. Consolidatory ablative stereotactic body radiation therapy after induction chemotherapy for unresectable pancreatic cancer: A single center experience. Front Oncol 2022; 12:974454. [PMID: 36505838 PMCID: PMC9733675 DOI: 10.3389/fonc.2022.974454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 10/26/2022] [Indexed: 11/21/2022] Open
Abstract
Background and purpose Consolidatory radiotherapy in form of stereotactic body radiation therapy (SBRT) with an ablative dose following induction chemotherapy is emerging as a promising treatment scheme for unresectable pancreatic cancer. Outcomes of given treatment at a single center for contiguous patients with unresectable pancreatic cancer were evaluated to build the optimal treatment strategy. Materials and methods In this retrospective study, a total of 50 patients with unresectable pancreatic cancer who underwent induction chemotherapy and ablative dose SBRT were included. SBRT dose was 40-50 Gy in five fractions. Two strategies were adopted to adhere to the organs at risk (OAR) dose constraints: simultaneous integrated protection (SIP) technique and magnetic resonance (MR)-guided adaptive technique. Overall survival (OS) and local progression-free survival (LPFS) were calculated from the start date of SBRT. Results The median follow-up period for survivors was 21.1 months (range, 6.2-61.0 months). Eleven (22.0%) patients underwent resection after SBRT, which were all R0 resection. In patients with non-metastatic disease, the median OS was 26.5 months (range, 4.1-61.0 months), and the 1- and 3-year LPFS were 90.0% (95% confidence interval [CI], 72.0-96.7%) and 57.4% (95% CI, 31.7-76.4%), respectively. Patients with oligometastatic disease had inferior survival outcomes, but there was no survival difference among responders to induction chemotherapy. In the multivariable analysis, tumor size ≤4 cm, non-metastatic status, and good response to induction chemotherapy were associated with improved LPFS. In dosimetric analysis, GTV Dmin ≥50.5 Gy was the strongest prognosticator against local progression. Grade ≥3 adverse events occurred in two (4.0%) patients with non-adaptive RT, but none in patients with MR-guided adaptive RT. Conclusion Ablative dose SBRT following induction chemotherapy is an effective strategy for selected patients with unresectable pancreatic cancer. The SIP technique and MR-guided adaptive RT were attributed to minimizing the risk of adverse events. Further studies are needed to identify the best candidates for consolidatory SBRT in unresectable pancreatic cancer.
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Affiliation(s)
- Hye In Lee
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, South Korea
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, South Korea
| | - Hyun-Cheol Kang
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, South Korea
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, South Korea
| | - Eui Kyu Chie
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, South Korea
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, South Korea
- Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul, South Korea
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Tanaka O, Taniguchi T, Adachi K, Nakaya S, Kiryu T, Ukai A, Makita C, Matsuo M. Effect of stomach size on organs at risk in pancreatic stereotactic body radiotherapy. Radiat Oncol 2022; 17:136. [PMID: 35909121 PMCID: PMC9339195 DOI: 10.1186/s13014-022-02107-1] [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: 04/28/2022] [Accepted: 07/21/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In clinical practice, the organs at risk (OARs) should be carefully determined when performing pancreatic stereotactic body radiotherapy (SBRT). We conducted a simulation study to examine the effect of the stomach size on the radiation dose to the OARs when performing pancreatic SBRT. METHODS Twenty-five cases were included in this study. Pancreatic head and body tumors were 2-cm-sized pseudotumors, which were included as gross target volume (GTV) contours. The stomach, pancreas, small intestine, liver, kidneys, and spinal cord were considered as the OARs. The prescription dose for planning target volume (PTV) was 40 Gy/5fx, and the dose limit for the OARs was determined. The dose to X% of the OAR volume at X values of 0.1, 5.0, and 10.0 cc (DX) and the percentage of the OAR volume that received more than X Gy were recorded. RESULTS In terms of the radiation dose to the pancreatic body tumors, the stomach size was positively correlated with a dose of D10cc [correlation coefficient (r) = 0.5516) to the stomach. The r value between the radiation dose to the pancreatic head tumor and the stomach size was 0.3499. The stomach size and radiation dose to the head and body of the pancreas were positively correlated (pancreatic head D10cc: r = 0.3979, pancreatic body D10cc: r = 0.3209). The larger the stomach, the larger the radiation dose to the healthy portion of the pancreas outside the PTV. CONCLUSIONS When performing pancreatic SBRT, the dose to the OARs depends on the stomach size. Reducing the dose to the stomach and pancreas can be achieved by shrinking the stomach.
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Affiliation(s)
- Osamu Tanaka
- Department of Radiation Oncology, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan.
| | - Takuya Taniguchi
- Department of Radiation Oncology, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan
| | - Kousei Adachi
- Department of Radiation Oncology, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan
| | - Shuto Nakaya
- Department of Radiation Oncology, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan
| | - Takuji Kiryu
- Department of Radiation Oncology, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan
| | - Akira Ukai
- Department of Oral and Maxillofacial Surgery, Asahi University Hospital, 3-23 Hashimoto-cho, Gifu City, Gifu, 500-8523, Japan
| | - Chiyoko Makita
- Department of Radiology, Gifu University Hospital, 1-1 Yanagido, Gifu City, Gifu, 501-1194, Japan
| | - Masayuki Matsuo
- Department of Radiology, Gifu University Hospital, 1-1 Yanagido, Gifu City, Gifu, 501-1194, Japan
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Simoni N, Rossi G, Cellini F, Vitolo V, Orlandi E, Valentini V, Mazzarotto R, Sverzellati N, D'Abbiero N. Ablative Radiotherapy (ART) for Locally Advanced Pancreatic Cancer (LAPC): Toward a New Paradigm? Life (Basel) 2022; 12:life12040465. [PMID: 35454956 PMCID: PMC9025325 DOI: 10.3390/life12040465] [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: 03/04/2022] [Accepted: 03/17/2022] [Indexed: 11/16/2022] Open
Abstract
Locally advanced pancreatic cancer (LAPC) represents a major urgency in oncology. Due to the massive involvement of the peripancreatic vessels, a curative-intent surgery is generally precluded. Historically, LAPC has been an indication for palliative systemic therapy. In recent years, with the introduction of intensive multi-agent chemotherapy regimens and aggressive surgical approaches, the survival of LAPC patients has significantly improved. In this complex and rapidly evolving scenario, the role of radiotherapy is still debated. The use of standard-dose conventional fractionated radiotherapy in LAPC has led to unsatisfactory oncological outcomes. However, technological advances in radiation therapy over recent years have definitively changed this paradigm. The use of ablative doses of radiotherapy, in association with image-guidance, respiratory organ-motion management, and adaptive protocols, has led to unprecedented results in terms of local control and survival. In this overview, principles, clinical applications, and current pitfalls of ablative radiotherapy (ART) as an emerging treatment option for LAPC are discussed.
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Affiliation(s)
- Nicola Simoni
- Radiotherapy Unit, Azienda Ospedaliera Universitaria, 43126 Parma, Italy
| | - Gabriella Rossi
- Department of Radiation Oncology, Azienda Ospedaliero Universitaria Integrata, 37126 Verona, Italy
| | - Francesco Cellini
- Radioterapia Oncologica ed Ematologia, Dipartimento Universitario Diagnostica per Immagini, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Radioterapia Oncologica ed Ematologia, Dipartimento di Diagnostica per Immagini, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Roma, Italy
| | - Viviana Vitolo
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy
| | - Ester Orlandi
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy
| | - Vincenzo Valentini
- Radioterapia Oncologica ed Ematologia, Dipartimento Universitario Diagnostica per Immagini, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Radioterapia Oncologica ed Ematologia, Dipartimento di Diagnostica per Immagini, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Roma, Italy
| | - Renzo Mazzarotto
- Department of Radiation Oncology, Azienda Ospedaliero Universitaria Integrata, 37126 Verona, Italy
| | - Nicola Sverzellati
- Division of Radiology, Azienda Ospedaliera Universitaria, 43126 Parma, Italy
| | - Nunziata D'Abbiero
- Radiotherapy Unit, Azienda Ospedaliera Universitaria, 43126 Parma, Italy
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9
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Ermongkonchai T, Khor R, Muralidharan V, Tebbutt N, Lim K, Kutaiba N, Ng SP. Stereotactic radiotherapy and the potential role of magnetic resonance-guided adaptive techniques for pancreatic cancer. World J Gastroenterol 2022; 28:745-754. [PMID: 35317275 PMCID: PMC8891728 DOI: 10.3748/wjg.v28.i7.745] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/11/2021] [Accepted: 01/22/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pancreatic cancer is a malignancy with one of the poorest prognoses amongst all cancers. Patients with unresectable tumours either receive palliative care or undergo various chemoradiotherapy regimens. Conventional techniques are often associated with acute gastrointestinal toxicities, as adjacent critical structures such as the duodenum ultimately limits delivered doses. Stereotactic body radiotherapy (SBRT) is an advanced radiation technique that delivers highly ablative radiation split into several fractions, with a steep dose fall-off outside target volumes.
AIM To discuss the latest data on SBRT and whether there is a role for magnetic resonance-guided techniques in multimodal management of locally advanced, unresectable pancreatic cancer.
METHODS We conducted a search on multiple large databases to collate the latest records on radiotherapy techniques used to treat pancreatic cancer. Out of 1229 total records retrieved from our search, 36 studies were included in this review.
RESULTS Studies indicate that SBRT is associated with improved clinical efficacy and toxicity profiles compared to conventional radiotherapy techniques. Further dose escalation to the tumour with SBRT is limited by the poor soft-tissue visualisation of computed tomography imaging during radiation planning and treatment delivery. Magnetic resonance-guided techniques have been introduced to improve imaging quality, enabling treatment plan adaptation and re-optimisation before delivering each fraction.
CONCLUSION Therefore, SBRT may lead to improved survival outcomes and safer toxicity profiles compared to conventional techniques, and the addition of magnetic resonance-guided techniques potentially allows dose escalation and conversion of unresectable tumours to operable cases.
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Affiliation(s)
- Tai Ermongkonchai
- Department of Radiation Oncology, Olivia Newton-John Cancer Centre at Austin Health, Heidelberg 3084, Victoria, Australia
| | - Richard Khor
- Department of Radiation Oncology, Olivia Newton-John Cancer Centre at Austin Health, Heidelberg 3084, Victoria, Australia
| | | | - Niall Tebbutt
- Department of Medical Oncology, Olivia Newton-John Cancer Centre at Austin Health, Heidelberg 3084, Victoria, Australia
| | - Kelvin Lim
- Department of Diagnostic Radiology, Austin Health, Heidelberg 3084, Victoria, Australia
| | - Numan Kutaiba
- Department of Diagnostic Radiology, Austin Health, Heidelberg 3084, Victoria, Australia
| | - Sweet Ping Ng
- Department of Radiation Oncology, Olivia Newton-John Cancer Centre at Austin Health, Heidelberg 3084, Victoria, Australia
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10
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Ryckman JM, Reames BN, Klute KA, Hall WA, Baine MJ, Abdel-Wahab M, Lin C. The timing and design of stereotactic radiotherapy approaches as a part of neoadjuvant therapy in pancreatic cancer: Is it time for change? Clin Transl Radiat Oncol 2021; 28:124-128. [PMID: 33981865 PMCID: PMC8085778 DOI: 10.1016/j.ctro.2021.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 12/12/2022] Open
Abstract
Stereotactic Radiotherapy (SRT) over 5-15 days can be interdigitated without delaying chemotherapy. Bridging chemotherapy may allow for extended intervals to surgery, potentially improving sterilization of surgical margins and overall survival. SRT for pancreatic adenocarcinoma should not be limited to the tumor, and should consider hypofractionated approaches to regional nodes.
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Affiliation(s)
- Jeffrey M. Ryckman
- Department of Radiation Oncology, West Virginia University Cancer Institute, Parkersburg, WV, USA
| | - Bradley N. Reames
- Department of Surgery, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kelsey A. Klute
- Department of Medical Oncology, University of Nebraska Medical Center, Omaha, NE, USA
| | - William A. Hall
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Michael J. Baine
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE, USA
| | - May Abdel-Wahab
- Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Chi Lin
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE, USA
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11
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Rossi G, Simoni N, Paiella S, Rossi R, Venezia M, Micera R, Malleo G, Salvia R, Giuliani T, Di Gioia A, Auriemma A, Milella M, Guariglia S, Cavedon C, Bassi C, Mazzarotto R. Risk Adapted Ablative Radiotherapy After Intensive Chemotherapy for Locally Advanced Pancreatic Cancer. Front Oncol 2021; 11:662205. [PMID: 33959509 PMCID: PMC8093383 DOI: 10.3389/fonc.2021.662205] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 03/16/2021] [Indexed: 01/05/2023] Open
Abstract
Background and Objective To assess the efficacy of a Risk-Adapted Ablative Radiotherapy (RAdAR) approach, after intensive induction chemotherapy, in patients with locally advanced pancreatic cancer (LAPC). Material and Methods Patients with LAPC who received RAdAR following induction chemotherapy from January 2017 to December 2019 were included in this observational study. The RAdAR approach consisted of an anatomy- and simultaneous integrated boost (SIB)-based dose prescription strategy. RAdAR was delivered with stereotactic ablative radiation therapy (SAbR), administering 30 Gy in 5 fractions to the tumor volume (PTVt) and 50 Gy SIB (BED10 100 Gy) to the vascular involvement, or with (hypo-)fractionated ablative radiotherapy (HART) prescribing 50.4 Gy in 28 fractions to the PTVt, with a vascular SIB of 78.4 Gy (BED10 100 Gy). Primary end points were freedom from local progression (FFLP), overall survival (OS), and progression-free survival (PFS). Results Sixty-four LAPC patients were included. Induction chemotherapy consisted of gemcitabine/nab-paclitaxel in 60.9% and FOLFIRINOX in 39.1% of cases. SAbR was used in 52 (81.2%) patients, and HART in 12 (18.8%). After RAdAR, surgery was performed in 17 (26.6%) patients. Median follow-up was 16.1 months. Overall local control (LC) rate was 78.1%, with no difference between resected and non-resected patients (2-year FFLP 75.3% vs 56.4%; p = 0.112). Median OS and PFS were 29.7 months and 8.7 months, respectively, for the entire cohort. Resected patients had a better median OS (not reached versus 26.1 months; p = 0.0001) and PFS (19 versus 5.6 months; p < 0.0001) compared to non-resected patients. In non-resected patients, no significant difference was found between SAbR and HART for median FFLP (28.1 versus 18.5 months; p = 0.614), OS (27.4 versus 25.3 months; p = 0.624), and PFS (5.7 versus 4.3 months; p = 0.486). One patient (1.6%) experienced acute grade 4 gastro-intestinal bleeding. No other acute or late grade ≥ 3 toxicities were observed. Conclusions The RAdAR approach, following intensive induction chemotherapy, is an effective radiation treatment strategy for selected LAPC patients, representing a promising therapeutic option in a multimodality treatment regimen.
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Affiliation(s)
- Gabriella Rossi
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
| | - Nicola Simoni
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
| | - Salvatore Paiella
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Roberto Rossi
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
| | - Martina Venezia
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
| | - Renato Micera
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
| | - Giuseppe Malleo
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Roberto Salvia
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Tommaso Giuliani
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Anthony Di Gioia
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Alessandra Auriemma
- Department of Oncology, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Michele Milella
- Department of Oncology, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Stefania Guariglia
- Department of Medical Physics, University of Verona Hospital Trust, Verona, Italy
| | - Carlo Cavedon
- Department of Medical Physics, University of Verona Hospital Trust, Verona, Italy
| | - Claudio Bassi
- Department of General and Pancreatic Surgery, Pancreas Institute, University of Verona Hospital Trust, Verona, Italy
| | - Renzo Mazzarotto
- Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy
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