Accuracy of patient dose estimation in cone beam computed tomography in breast irradiation by size-specific dose estimates with position correction.

This study aims to investigate the effects of the position correction of size-specific dose estimates (SSDE) on patient dose estimation in cone beam computed tomography (CBCT). The relationship between the phantom position and absorbed dose in the right breast was studied using optically stimulated luminescence dosimeters and a simulated human body phantom. The effect of position correction for CT dose index (CTDI) on SSDE was investigated in 51 patients who underwent right breast irradiation by comparing the SSDE with position correction and SSDE without position correction.

Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation.

This study aims to investigate the influence of the phantom position on weighted computed tomography dose index (CTDI ) in cone beam computed tomography (CBCT) when assuming breast irradiation. Computed tomography dose index (CTDI) was measured by the x-ray volume imaging of CBCT using parameters for image-guided radiation therapy (IGRT) in right breast irradiation. The measurement points of CTDI ranged from 0 (center) to 16 cm in the right-left (RL) direction, and from 0 (center) to 7.

A template for forward planning in prostate cancer treatment: conformal irradiation with segmental intensity-modulation.

Background And Purpose: The use of intensity-modulated radiotherapy (IMRT) has proven to be effective in radiation therapy of the prostate, but difficulties in quality assurance (QA) and prolonged planning time are considered problems. We proposed a template for prostate irradiation using conventional treatment fields.

Materials And Methods: To establish a general treatment method, we used computed tomography scan studies of 50 male patients with various diseases as anatomic references for planning.