Clinical significance of conformity index and gradient index in patients undergoing stereotactic radiosurgery for a single metastatic tumor
نویسندگان
چکیده
منابع مشابه
Quality of coverage: Conformity measures for stereotactic radiosurgery
In radiosurgery, conformity indices are often used to compare competing plans, evaluate treatment techniques, and assess clinical complications. Several different indices have been reported to measure the conformity of the prescription isodose to the target volume. The PITV recommended in the Radiation Therapy Oncology Group (RTOG) radiosurgery guidelines, defined as the ratio of the prescripti...
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BACKGROUND This retrospective study investigated the outcome of patients with brain metastases after radiosurgery with special emphasis on prognostic impact of visible intratumoral necrosis on survival and local control. METHODS From 1998 through 2008, 149 patients with brain metastases from solid tumors were treated with stereotactic radiotherapy at Luebeck University. Median age was 58.4 ye...
متن کاملEvaluation of stereotactic radiosurgery conformity indices for 170 target volumes in patients with brain metastases
A database of clinically approved stereotactic radiosurgery treatment plans was created. One hundred and seventy targets in the database were then retrospectively evaluated using conformity indices suggested by RTOG, SALT-Lomax and Paddick. Relationships between the three alternative conformity indices were determined. The Paddick index combines the information provided by the RTOG and SALT-Lom...
متن کاملStereotactic Radiosurgery/Radiotherapy: A Historical Review
"Stereotactic" is an exact radiotherapy treatment modality which implements invasive and non-invasive facilities for improving precise dose delivery. Stereotactic refers to three-dimensional localization of a specific point in space by a unique set of coordinates that relate to a fixed external reference frame. An accurate delivery of radiation is attainable using these techniques with high pre...
متن کاملRadiosurgery Practice Guideline Initiative Stereotactic Radiosurgery for Patients with Metastatic Brain Tumors
form. Local brain control was not defined in the abstract. In summary, three randomized trials detected an improvement in local brain control in patients treated with WBRT and radiosurgery boost compared with WBRT alone. Local brain control at one year ranged from 82–92% in the radiosurgery boost arm vs. 0–71% in the WBRT alone arm. The study by Kondziolka et al. also noted superior intracrania...
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ژورنال
عنوان ژورنال: Journal of Neurosurgery
سال: 2018
ISSN: 0022-3085,1933-0693
DOI: 10.3171/2018.6.gks181314