Dose Gradient Index for Stereotactic Radiosurgery/Radiotherapy
The dose gradient index (DGI) was developed as a quantitative metric for characterizing radiation dose fall-off with respect to distance away from the outer surface of a target volume . It is complementary to the conformity index, which quantifies the degree to which the prescription isodose conforms to the size and shape of the target . Currently, there is not clinical evidence to suggest DGI guidelines applicable in the setting of intracranial SRS/SRT. This activity explores the DGI concept and formulation, as well as provides the clinician with guidelines and examples of clinical applicability in the intracranial SRS/SRT setting.
Please visit https://www.redjournal.org/article/S0360-3016(19)34469-4/fulltext to read the related journal article online.
This activity is available from January 31, 2020, through 11:59 p.m. Eastern time on January 30, 2022.
This program is designed to meet the interest of radiation oncologists, physicists and radiation oncology residents.
- Summarize the rationale and potential limitations for use of the dose gradient index as a metric for plan evaluation in intracranial SRS/SRT.
- Identify preliminary recommendations for ideal and minimally achievable DGI as a function of tumor size.
Richard Castillo, PhD has no financial relationships with a commercial interest.
Mustafa Ozer, MS has no financial relationships with a commercial interest.
The person(s) above served as the developer(s) of this activity. Additionally, the Journal CME Task Force and CME/MOC Committee had control over the content of this activity.
The American Society for Radiation Oncology (ASTRO) is accredited by the Accreditation Council of Continuing Medical Education to provide continuing education to physicians.
ASTRO is awarded Deemed Status by the American Board of Radiology to provide SA-CME as part of Part II Maintenance of Certification.
- 1.00 SA-CME
The American Society for Radiation Oncology (ASTRO) is accredited by the Accreditation Council of Continuing Medical Education to provide continuing medical education for physicians.
The American Society for Radiation Oncology (ASTRO) designates this Journal-based CME activity for a maximum of 1.00 AMA PRA Category 1 Credit™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.
This activity meets the American Board of Radiology's criteria for a self-assessment activity in the ABR's Maintenance of Certification program. Participation in this course in combination with the successful completion of the corresponding assessment and course evaluation adheres to the guidelines established by the ABR for 1.00 self-assessment credits.
- 1.00 Certificate of AttendanceThis activity was designated for 1.00 AMA PRA Category 1 Credit™.
ASTRO members must log in to the ASTRO website to view and receive the discounted member rate.
- Nonmember: $30
- Member: $25
No refunds, extensions, or substitutions will be made for those participants who, for any reason, have not completed the course by the end of the qualification date. The qualification date for each course is listed in the course catalog on the ASTRO website under availability.
Participants using ASTRO's online courses to satisfy the requirement of a Maintenance of Certification (MOC) program should verify the number, type and availability dates of any course before making a purchase. No refunds, extensions, or substitutions will be made for participants who have purchased courses that do not align with their MOC requirement.
The course and its materials will only be available on the ASTRO website for that 2 year period regardless of purchase date. At the expiration of the qualification, participants will no longer have access to the course or its materials. ASTRO reserves the right to remove a course before the end of its qualification period.
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