Linear Accelerator-Based Intensity-Modulated Total Marrow Irradiation Technique for Treatment of Hematologic Malignancies: A Dosimetric Feasibility Study

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · International Journal of Radiation Oncology, Biology and Physics

DOI:https://doi.org/10.1016/j.ijrobp.2010.06.029· OSTI ID:21491670

Yeginer, Mete ^[1]; Roeske, John C ^[2]; Radosevich, James A ^[1]; Aydogan, Bulent ^[3]

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1. Center for Molecular Biology of Oral Diseases, University of Illinois at Chicago, Chicago, IL (United States)
2. Department of Radiation Oncology, Loyola University, Chicago, IL (United States)
3. Department of Radiation and Cellular Oncology, University of Chicago Pritzker School of Medicine, Chicago, IL (United States)

Purpose: To investigate the dosimetric feasibility of linear accelerator-based intensity-modulated total marrow irradiation (IM-TMI) in patients with hematologic malignancies. Methods and Materials: Linear accelerator-based IM-TMI treatment planning was performed for 9 patients using the Eclipse treatment planning system. The planning target volume (PTV) consisted of all the bones in the body from the head to the mid-femur, except for the forearms and hands. Organs at risk (OAR) to be spared included the lungs, heart, liver, kidneys, brain, eyes, oral cavity, and bowel and were contoured by a physician on the axial computed tomography images. The three-isocenter technique previously developed by our group was used for treatment planning. We developed and used a common dose-volume objective method to reduce the planning time and planner subjectivity in the treatment planning process. Results: A 95% PTV coverage with the 99% of the prescribed dose of 12 Gy was achieved for all nine patients. The average dose reduction in OAR ranged from 19% for the lungs to 68% for the lenses. The common dose-volume objective method decreased the planning time by an average of 35% and reduced the inter- and intra- planner subjectivity. Conclusion: The results from the present study suggest that the linear accelerator-based IM-TMI technique is clinically feasible. We have demonstrated that linear accelerator-based IM-TMI plans with good PTV coverage and improved OAR sparing can be obtained within a clinically reasonable time using the common dose-volume objective method proposed in the present study.

• OSTI ID: 21491670
• Journal Information: International Journal of Radiation Oncology, Biology and Physics, Journal Name: International Journal of Radiation Oncology, Biology and Physics Journal Issue: 4 Vol. 79; ISSN IOBPD3; ISSN 0360-3016
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
ACCELERATORS
ANIMAL TISSUES
BODY
BONE MARROW
BRAIN
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DISEASES
DOSES
EYES
FACE
FEASIBILITY STUDIES
FEMUR
GLANDS
HEAD
HEART
HEMATOPOIETIC SYSTEM
KIDNEYS
LINEAR ACCELERATORS
LIVER
LUNGS
MEDICINE
NEOPLASMS
NERVOUS SYSTEM
NUCLEAR MEDICINE
ORAL CAVITY
ORGANS
PLANNING
RADIATION DOSES
RADIOLOGY
RADIOTHERAPY
RESPIRATORY SYSTEM
SENSE ORGANS
SKELETON
THERAPY
TOMOGRAPHY