Work

Prescribed and Measured Dose Differences for an AP-PA TBI Protocol with Compensation Filter and Ergonomic Patient Support

Year: 2017

Type: article

Abstract: 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.

Source: Journal of medical imaging and radiation sciences

DOI: 10.1016/j.jmir.2017.06.001

Authors: Francisco Mesa Linares, Nikos Papanikolaou, Carlos Esquivel, Tony Y. Eng, Clifton D. Fuller, Modesto Sosa

Institutions: Universidad Autónoma de Baja California, The University of Texas at San Antonio Health Science Center, Universidad de Guanajuato

Language: English

Topic: Advanced Radiotherapy Techniques

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $2,900