TY - JOUR
T1 - Prescribed and Measured Dose Differences for an AP-PA TBI Protocol with Compensation Filter and Ergonomic Patient Support
AU - Mesa Linares, Francisco
AU - Papanikolaou, Nikos
AU - Esquivel, Carlos
AU - Eng, Tony Y.
AU - Fuller, Clifton D.
AU - Sosa, Modesto
N1 - Funding Information:
This work was partially supported by the University of Guanajuato (PIFI-07-2) , México and Autonomous University of Santo Domingo (Fellowship Professor's Program 03-11) , Dominican Republic. The authors also thank the contributions of the staff at the Cancer Therapy & Research Center at San Antonio, TX, for their collaboration in this project.
Funding Information:
This work was partially supported by the University of Guanajuato (PIFI-07-2), M?xico and Autonomous University of Santo Domingo (Fellowship Professor's Program 03-11), Dominican Republic. The authors also thank the contributions of the staff at the Cancer Therapy & Research Center at San Antonio, TX, for their collaboration in this project.
Publisher Copyright:
© 2017 Canadian Association of Medical Radiation Technologists
PY - 2017/9
Y1 - 2017/9
N2 - Introduction A treatment scheme is presented for clinical applications of total body radiation using 6 MV photons. Methods The two-field technique, anteroposterior (AP) and posteroanterior (PA), was applied. In vivo dose verification with TLD-100 dosimeters was developed during the first treatment sessions. Dosimetry was performed in several anatomical regions such as head, shoulder, thorax, abdomen, hip, thigh, knee, and ankle in 13 patients as preconditioning for bone marrow transplantation. A prescribed dose of 100 cGy was considered at the level of the patient's coronal plane. Values with least differences between measured and prescribed dose were obtained for the shoulder. Results Standard deviation percentages of 0.3% and 2.6% were recorded between these doses for AP and PA, respectively. There were larger differences for other contours. In general, a measured dose less than the prescribed dose was observed in all the contours. Conclusion Differences between prescribed and measured doses showed in this study can contribute to a required understanding about the accurate doses in AP-PA total body irradiation (TBI) treatments.
AB - Introduction A treatment scheme is presented for clinical applications of total body radiation using 6 MV photons. Methods The two-field technique, anteroposterior (AP) and posteroanterior (PA), was applied. In vivo dose verification with TLD-100 dosimeters was developed during the first treatment sessions. Dosimetry was performed in several anatomical regions such as head, shoulder, thorax, abdomen, hip, thigh, knee, and ankle in 13 patients as preconditioning for bone marrow transplantation. A prescribed dose of 100 cGy was considered at the level of the patient's coronal plane. Values with least differences between measured and prescribed dose were obtained for the shoulder. Results Standard deviation percentages of 0.3% and 2.6% were recorded between these doses for AP and PA, respectively. There were larger differences for other contours. In general, a measured dose less than the prescribed dose was observed in all the contours. Conclusion Differences between prescribed and measured doses showed in this study can contribute to a required understanding about the accurate doses in AP-PA total body irradiation (TBI) treatments.
KW - AP-PA
KW - bone marrow
KW - dose calculation
KW - radiotherapy
KW - total body irradiation
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U2 - 10.1016/j.jmir.2017.06.001
DO - 10.1016/j.jmir.2017.06.001
M3 - Article
C2 - 31047414
AN - SCOPUS:85022019397
SN - 1939-8654
VL - 48
SP - 301
EP - 306
JO - Journal of Medical Imaging and Radiation Sciences
JF - Journal of Medical Imaging and Radiation Sciences
IS - 3
ER -