Abstract
Purpose. - To assess the benefits of using cardiac gated images for treatment planning of breast and internal mammary nodes. Patients and methods. - Inspiration breath hold computed tomography (CT) series acquired at prospectively gated diastolic phase were used for planning. Three different techniques were compared. Technique A used tangents and an internal mammary nodes field covering the three first inter-rib spaces; technique B used an extended internal mammary nodes including part of the medial breast in junction with tangential fields; the 3. technique used helical tomo-therapy. For each technique, two treatment plans were performed: one plan (plan-01) where mean dose and V25 to the heart were considered for plan evaluation and a second plan (plan-02) where the irradiation of the left anterior descending artery was minimized. Results. - V{sub 25} to the heart was found to be less than 5% for all six plans. Mean doses to the heart were within 4.8 to 7.2 Gy. By attempting to lower the dose to the left anterior descending artery, heart D{sub mean} was decreased by 20-30% for the two techniques A and B while being unchanged for tomo-therapy. Regarding target coverage, there was no marked difference between plans where only heart
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Almeida, C.E. de;
[1]
Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)];
Fournier-Bidoz, N;
Massabeau, C;
Mazal, A;
Campana, F;
Fourquet, A;
Kirova, Y M;
[1]
Canary, P C;
[2]
Kuroki, I R
[3]
- Department of Radiation Oncology, Institut Curie, 26, rue d'Ulm, 75005 Paris (France)
- Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)
- Clinica de Diagnostico por Imagem - CDPI, Rio de Janeiro, RJ (Brazil)
Citation Formats
Almeida, C.E. de, Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)], Fournier-Bidoz, N, Massabeau, C, Mazal, A, Campana, F, Fourquet, A, Kirova, Y M, Canary, P C, and Kuroki, I R.
Potential benefits of using cardiac gated images to reduce the dose to the left anterior descending coronary during radiotherapy of left breast and internal mammary nodes; Benefice potentiel d'utilisation d'images obtenues avec gating cardiaque pour diminuer la dose d'irradiation au niveau de l'artere descendante coronaire gauche.
France: N. p.,
2012.
Web.
doi:10.1016/J.CANRAD.2011.07.244.
Almeida, C.E. de, Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)], Fournier-Bidoz, N, Massabeau, C, Mazal, A, Campana, F, Fourquet, A, Kirova, Y M, Canary, P C, & Kuroki, I R.
Potential benefits of using cardiac gated images to reduce the dose to the left anterior descending coronary during radiotherapy of left breast and internal mammary nodes; Benefice potentiel d'utilisation d'images obtenues avec gating cardiaque pour diminuer la dose d'irradiation au niveau de l'artere descendante coronaire gauche.
France.
https://doi.org/10.1016/J.CANRAD.2011.07.244
Almeida, C.E. de, Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)], Fournier-Bidoz, N, Massabeau, C, Mazal, A, Campana, F, Fourquet, A, Kirova, Y M, Canary, P C, and Kuroki, I R.
2012.
"Potential benefits of using cardiac gated images to reduce the dose to the left anterior descending coronary during radiotherapy of left breast and internal mammary nodes; Benefice potentiel d'utilisation d'images obtenues avec gating cardiaque pour diminuer la dose d'irradiation au niveau de l'artere descendante coronaire gauche."
France.
https://doi.org/10.1016/J.CANRAD.2011.07.244.
@misc{etde_22067235,
title = {Potential benefits of using cardiac gated images to reduce the dose to the left anterior descending coronary during radiotherapy of left breast and internal mammary nodes; Benefice potentiel d'utilisation d'images obtenues avec gating cardiaque pour diminuer la dose d'irradiation au niveau de l'artere descendante coronaire gauche}
author = {Almeida, C.E. de, Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)], Fournier-Bidoz, N, Massabeau, C, Mazal, A, Campana, F, Fourquet, A, Kirova, Y M, Canary, P C, and Kuroki, I R}
abstractNote = {Purpose. - To assess the benefits of using cardiac gated images for treatment planning of breast and internal mammary nodes. Patients and methods. - Inspiration breath hold computed tomography (CT) series acquired at prospectively gated diastolic phase were used for planning. Three different techniques were compared. Technique A used tangents and an internal mammary nodes field covering the three first inter-rib spaces; technique B used an extended internal mammary nodes including part of the medial breast in junction with tangential fields; the 3. technique used helical tomo-therapy. For each technique, two treatment plans were performed: one plan (plan-01) where mean dose and V25 to the heart were considered for plan evaluation and a second plan (plan-02) where the irradiation of the left anterior descending artery was minimized. Results. - V{sub 25} to the heart was found to be less than 5% for all six plans. Mean doses to the heart were within 4.8 to 7.2 Gy. By attempting to lower the dose to the left anterior descending artery, heart D{sub mean} was decreased by 20-30% for the two techniques A and B while being unchanged for tomo-therapy. Regarding target coverage, there was no marked difference between plans where only heart dose was considered (plans-01) and plans where the left anterior descending artery dose was minimized (plans-02). When the left anterior descending artery dose was part of plan evaluation, D{sub mean} to the left anterior descending artery could be decreased by 24, 19 and 9% for techniques A, B and tomo-therapy respectively. The three techniques exposed segments of the left coronary to different levels of dose. Conclusion. - This study showed that evaluation of the dose to the left anterior descending artery coronary may change the treatment strategy. Cardiac gated images without IV contrast permitted a good visualization of the coronaries in order to optimize the dose on these structures. In addition to heart V{sub 25}, the dose to the coronaries should be included in prospective studies on radiotherapy related heart toxicity in association with all additional risk factors. (authors)}
doi = {10.1016/J.CANRAD.2011.07.244}
journal = []
issue = {1}
volume = {16}
journal type = {AC}
place = {France}
year = {2012}
month = {Feb}
}
title = {Potential benefits of using cardiac gated images to reduce the dose to the left anterior descending coronary during radiotherapy of left breast and internal mammary nodes; Benefice potentiel d'utilisation d'images obtenues avec gating cardiaque pour diminuer la dose d'irradiation au niveau de l'artere descendante coronaire gauche}
author = {Almeida, C.E. de, Laboratorio de Ciencias Radiologicas, Universidade de Estado de Rio de Janeiro - UERJ, Rua Sao Francisco Xavier 524, bl. F / s. T-030, 20.550-900, Maracana, Rio de Janeiro, RJ (Brazil)], Fournier-Bidoz, N, Massabeau, C, Mazal, A, Campana, F, Fourquet, A, Kirova, Y M, Canary, P C, and Kuroki, I R}
abstractNote = {Purpose. - To assess the benefits of using cardiac gated images for treatment planning of breast and internal mammary nodes. Patients and methods. - Inspiration breath hold computed tomography (CT) series acquired at prospectively gated diastolic phase were used for planning. Three different techniques were compared. Technique A used tangents and an internal mammary nodes field covering the three first inter-rib spaces; technique B used an extended internal mammary nodes including part of the medial breast in junction with tangential fields; the 3. technique used helical tomo-therapy. For each technique, two treatment plans were performed: one plan (plan-01) where mean dose and V25 to the heart were considered for plan evaluation and a second plan (plan-02) where the irradiation of the left anterior descending artery was minimized. Results. - V{sub 25} to the heart was found to be less than 5% for all six plans. Mean doses to the heart were within 4.8 to 7.2 Gy. By attempting to lower the dose to the left anterior descending artery, heart D{sub mean} was decreased by 20-30% for the two techniques A and B while being unchanged for tomo-therapy. Regarding target coverage, there was no marked difference between plans where only heart dose was considered (plans-01) and plans where the left anterior descending artery dose was minimized (plans-02). When the left anterior descending artery dose was part of plan evaluation, D{sub mean} to the left anterior descending artery could be decreased by 24, 19 and 9% for techniques A, B and tomo-therapy respectively. The three techniques exposed segments of the left coronary to different levels of dose. Conclusion. - This study showed that evaluation of the dose to the left anterior descending artery coronary may change the treatment strategy. Cardiac gated images without IV contrast permitted a good visualization of the coronaries in order to optimize the dose on these structures. In addition to heart V{sub 25}, the dose to the coronaries should be included in prospective studies on radiotherapy related heart toxicity in association with all additional risk factors. (authors)}
doi = {10.1016/J.CANRAD.2011.07.244}
journal = []
issue = {1}
volume = {16}
journal type = {AC}
place = {France}
year = {2012}
month = {Feb}
}