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Kiser K, Schiff J, Laugeman E, Kim T, Green O, Hatscher C, Kim H, Badiyan S, Spraker M, Samson P, Robinson C, Price A, Henke L. A feasibility trial of skin surface motion-gated stereotactic body radiotherapy for treatment of upper abdominal or lower thoracic targets using a novel O-ring gantry. Clin Transl Radiat Oncol 2024; 44:100692. [PMID: 38021090 PMCID: PMC10652138 DOI: 10.1016/j.ctro.2023.100692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 10/22/2023] [Indexed: 12/01/2023] Open
Abstract
Background and purpose A novel O-ring gantry can deliver stereotactic body radiation therapy (SBRT) with artificial intelligence-facilitated, CT-guided online plan adaptation. It gates mobile targets by optically monitoring skin surface motion. However, this gating solution has not been clinically validated. We conducted a trial to evaluate the feasibility of optical skin surface-guided gating for patients with mobile upper abdominal or lower thoracic malignancies treated with SBRT on this platform (NCT05030454). Materials and methods Ten patients who were prescribed SBRT to a thoracic or abdominal target and were capable of breath-hold for at least 17 s enrolled. They received SBRT in five fractions with breath-hold technique and optical skin surface motion monitored-gating with a ± 2 mm tolerance. Online plan adaptation was left to the discretion of the daily treating physician. The primary endpoint was defined as successful completion of > 75 % of attempted fractions. Exploratory endpoints included local control and acute grade ≥ 3 toxicity rates after three months. For adapted fractions the contouring, planning, quality assurance, and treatment delivery times were recorded. Results Forty-seven of 51 SBRT fractions (92 %) were successfully gated at breath-hold by optical skin surface motion monitoring. The tumor centroid position during breath-hold varied by a mean of approximately 2 mm. Sixty-three percent of fractions were adapted online with a median total treatment time of 78.5 min. After three months no local recurrences or acute grade ≥ 3 toxicities were observed. Conclusions SBRT treatment to mobile targets with surface-monitored gating on a novel O-ring gantry was prospectively validated.
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Affiliation(s)
- Kendall Kiser
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Joshua Schiff
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Eric Laugeman
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Taeho Kim
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Olga Green
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
- Varian Medical Systems, 3100 Hansen Way, Palo Alto, CA 94304, USA
| | - Casey Hatscher
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Hyun Kim
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Shahed Badiyan
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Matthew Spraker
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
- Centura Health, 2525 S Downing St., Denver, CO 80210, USA
| | - Pamela Samson
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Clifford Robinson
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
| | - Alex Price
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
- Department of Radiation Oncology, Case Western Reserve School of Medicine, 11100 Euclid Avenue, Cleveland, OH 44106, USA
| | - Lauren Henke
- Department of Radiation Oncology, Washington University in St. Louis School of Medicine, 660 S. Euclid Avenue, MSC 8224-35-LL, St. Louis, MO 63110, USA
- Department of Radiation Oncology, Case Western Reserve School of Medicine, 11100 Euclid Avenue, Cleveland, OH 44106, USA
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