Dose correction in lung for HDR breast brachytherapy.

Purpose: To evaluate the dosimetric impact of lung tissue in Ir-192 APBI.

Material And Methods: In a 40 × 40 × 40 cm(3) water tank, an Accelerated Partial Breast Irradiation (APBI) brachytherapy balloon inflated to 4 cm diameter was situated directly below the center of a 30 × 30 × 1 cm(3) solid water slab. Nine cm of solid water was stacked above the 1 cm base.

Dose perturbation study in a multichannel breast brachytherapy device.

Purpose: A study was conducted to determine the dosimetric effects resulting from air pockets and high atomic number (Z) contrast medium within a multichannel breast brachytherapy device.

Material And Methods: A 5-6 cm diameter Contura (SenoRx) brachytherapy device was inflated using 37 cm(3) of saline. Baseline dose falloff from an HDR Iridium-192 source was measured with the Iridium source centered in the central channel and an anterior off-center channel.

Evaluation of rotational errors in treatment setup of stereotactic body radiation therapy of liver cancer.

Purpose: To evaluate the dosimetric impact of rotational setup errors in stereotactic body radiotherapy (SBRT) treatment of liver tumors and to investigate whether translational shifts can compensate for rotation.

Methods And Materials: The positioning accuracy in 20 patients with liver malignancies treated with SBRT was reevaluated offline by matching the patients' cone-beam computed tomography (CT) scans (n=75) to the planning CT scans and adjusting the 3 rotational angles (pitch, roll, and yaw). Systematic and random setup errors were calculated.

A simple method for dose fusion from multimodality treatment of prostate cancer: brachytherapy to external beam therapy.

Purpose: Suboptimal dosage evaluated from postimplant dosimetry of prostate brachytherapy creates conundrum that needs resolution. This pilot study was undertaken to explore the feasibility of summing and visualizing radiation dosage from multimodality treatment.

Methods And Materials: Four weeks after (125)I permanent prostate seed implant, CT scans were performed on the whole pelvis of patients using our standard protocol for prostate planning.

Treatment delays using an automated afterloading low-dose-rate brachytherapy system.

Purpose: Low-dose-rate (LDR) brachytherapy is an integral treatment modality in radiation oncology. Clinical efficacy is based on experience with manual source loading and continuous dose delivery. With remote afterloading technology, sources may be loaded and unloaded during the treatment course to prevent radiation exposure to nursing staff members and visitors.