Gregory Perkins

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OBJECTIVE The objective of this study was to examine the feasibility of a multimodal system to effectively induce and maintain contrast enhancement in both computed tomography (CT) and magnetic resonance (MR) for radiation therapy applications. MATERIALS AND METHODS The physicochemical characteristics of a liposome-encapsulated iohexol and gadoteridol(More)
PURPOSE To evaluate intensity-modulated radiation therapy (IMRT) as an alternative to conformal radiotherapy (CRT) or 4-field box boost (4FB) in women with gynecologic malignancies who are unsuitable for brachytherapy for technical or medical reasons. METHODS Dosimetric and toxicity information was analyzed for 12 patients with cervical (8), endometrial(More)
OBJECTIVE To develop a method for the assessment and characterization of 3D geometric distortion as part of routine quality assurance for MRI scanners commissioned for Radiation Therapy planning. MATERIALS AND METHODS In this study, the in-plane and through-plane geometric distortions on a 1.5T GE MRI-SIM unit are characterized and the 2D and 3D(More)
OBJECTIVE To develop and validate a large field of view phantom and quality assurance software tool for the assessment and characterization of geometric distortion in MRI scanners commissioned for radiation therapy planning. MATERIALS AND METHODS A purpose built phantom was developed consisting of 357 rods (6mm in diameter) of polymethyl-methacrylat(More)
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