Principles of external beam radiotherapy planning techniques

Background: Traditionally pelvic External Beam Radiotherapy is delivered with four field box technique in carcinoma cervix patients. The primary aim of this prospective observational study is to determine the adequacy of pelvic lymph nodal coverage by conventional Four Field Box Technique with the help of pelvic lymph node contouring by CT simulation.Methods: Between January 2013 and August 2015 sixty patients with biopsy proven Carcinoma Cervix were enrolled in this study. Of these fifty-three patients were available for final analysis. CT simulation based Pelvic lymph node contouring was done for each patient. Then two External Beam Radiotherapy plans were generated, one contoured based and the other based on bony landmark based Four Field Box Technique. The number of patients whose contoured lymph nodes lies partly outside the field borders of the bony landmark-based plan and also its extent was determined. D90 of various groups of pelvic lymph nodes obtained from both the plans were compared using ‘paired sample t - test’.Results: It was seen that with Four Field Box Technique there is inadequate coverage of common iliac lymph nodes in 34/53 patients. The difference between the mean D90 of common iliac lymph nodes in two sets of plans was found to be statistically significant.Conclusions: Pelvic field planning should be individualized. CT simulation-based radiotherapy planning should be done for each individual patient to adequately cover the nodal microscopic disease.

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SU-FF-T-458: Complementing Targeted Radionuclide Therapy with External Beam Radiotherapy: Planning Study

Medical Physics ◽

10.1118/1.3181940 ◽

2009 ◽

Vol 36 (6Part16) ◽

pp. 2628-2628

Author(s):

J Grudzinski ◽

S Bowen ◽

W Tome ◽

J Weichert ◽

R Jeraj

Keyword(s):

Radionuclide Therapy ◽

External Beam Radiotherapy ◽

Radiotherapy Planning ◽

External Beam ◽

Targeted Radionuclide Therapy ◽

Planning Study

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EANM/SNMMI practice guideline for [18F]FDG PET/CT external beam radiotherapy treatment planning in uterine cervical cancer v1.0

European Journal of Nuclear Medicine and Molecular Imaging ◽

10.1007/s00259-020-05112-2 ◽

2020 ◽

Author(s):

Judit A. Adam ◽

Annika Loft ◽

Cyrus Chargari ◽

Roberto C. Delgado Bolton ◽

Elisabeth Kidd ◽

...

Keyword(s):

Cervical Cancer ◽

Practice Guideline ◽

Fdg Pet ◽

External Beam Radiotherapy ◽

Relevant Literature ◽

Uterine Cervical Cancer ◽

Radiotherapy Planning ◽

External Beam ◽

Pet Ct ◽

Fdg Pet Ct

Abstract Purpose The aim of this EANM / SNMMI Practice Guideline with ESTRO endorsement is to provide general information and specific considerations about [18F]FDG PET/CT in advanced uterine cervical cancer for external beam radiotherapy planning with emphasis on staging and target definition, mostly in FIGO stages IB3-IVA and IVB, treated with curative intention. Methods Guidelines from related fields, relevant literature and leading experts have been consulted during the development of this guideline. As this field is rapidly evolving, this guideline cannot be seen as definitive, nor is it a summary of all existing protocols. Local variations should be taken into consideration when applying this guideline. Conclusion The background, common clinical indications, qualifications and responsibilities of personnel, procedure / specifications of the examination, documentation / reporting and equipment specifications, quality control and radiation safety in imaging is discussed with an emphasis on the multidisciplinary approach.

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