Intraoperative radiation therapy delivered prior to lumpectomy for early-stage breast cancer: a single institution study.

Objective: To evaluate the safety, cosmesis, and clinical outcome of intraoperative electron radiation therapy (IOERT) delivered prior to lumpectomy for early-stage breast cancer.

Methods: From December 2008 to March 2012, 75 breast cancer patients (ages 34-66 years) were treated with IOERT during breast conservative surgery. IOERT was delivered using a mobile linear accelerator.

[Measurement and analysis of the imaging dose with megavoltage computed tomography for helical tomotherapy].

Background & Objective: During the helical tomotherapy process, megavoltage computed tomography (MVCT) images are usually used for guiding the precise setup of patients before/after treatment delivery, which would certainly increase the total dose for patients. This study was to investigate the imaging dose of MVCT using the body and head phantom on a tomotherapy machine.

Methods: A set of cylindrical body and head phantoms was adopted for scanning with different pitch values (1.