R
R. Alex Hsi
Researcher at Virginia Mason Medical Center
Publications - 14
Citations - 1159
R. Alex Hsi is an academic researcher from Virginia Mason Medical Center. The author has contributed to research in topics: Radiation therapy & Prostate cancer. The author has an hindex of 8, co-authored 12 publications receiving 980 citations.
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Journal ArticleDOI
Stereotactic hypofractionated accurate radiotherapy of the prostate (SHARP), 33.5 Gy in five fractions for localized disease: First clinical trial results
TL;DR: In this paper, the feasibility and toxicity of stereotactic hypofractionated accurate radiotherapy (SHARP) for localized prostate cancer were evaluated in a Phase I/II trial with 40 patients.
Journal ArticleDOI
Hydrogel Spacer Prospective Multicenter Randomized Controlled Pivotal Trial: Dosimetric and Clinical Effects of Perirectal Spacer Application in Men Undergoing Prostate Image Guided Intensity Modulated Radiation Therapy
Neil Mariados,John Sylvester,Dhiren Shah,Lawrence Karsh,Richard Hudes,David C. Beyer,Steven Kurtzman,Jeffrey A. Bogart,R. Alex Hsi,Michael Kos,Rodney J. Ellis,Mark Logsdon,S.H. Zimberg,Kevin Forsythe,Hong Zhang,Edward Soffen,Patrick Francke,Constantine Mantz,Peter J. Rossi,Theodore L. DeWeese,Daniel A. Hamstra,Walter Bosch,Jeff M. Michalski +22 more
TL;DR: The spacer appears to be an effective tool, potentially enabling advanced prostate RT protocols, and decreased rates of patients experiencing declines in bowel quality of life.
Journal ArticleDOI
Continued Benefit to Rectal Separation for Prostate Radiation Therapy: Final Results of a Phase III Trial
Daniel A. Hamstra,Neil Mariados,John Sylvester,Dhiren Shah,Lawrence Karsh,Richard Hudes,David C. Beyer,Steven Kurtzman,Jeffrey A. Bogart,R. Alex Hsi,Michael Kos,Rodney J. Ellis,Mark Logsdon,S.H. Zimberg,Kevin Forsythe,Hong Zhang,Edward Soffen,Patrick Francke,Constantine Mantz,Peter J. Rossi,Theodore L. DeWeese,Stephanie Daignault-Newton,Benjamin W. Fischer-Valuck,Anupama Chundury,Walter Bosch,Jeff M. Michalski +25 more
TL;DR: The benefit of a hydrogel spacer in reducing the rectal dose, toxicity, and QOL declines after image guided intensity modulated radiation therapy for prostate cancer was maintained or increased with a longer follow-up period, providing stronger evidence for the benefit of hydrogels spacer use in prostate radiation therapy.
Journal Article
Photodynamic Therapy in the Canine Prostate Using Motexafin Lutetium
R. Alex Hsi,Amy S. Kapatkin,John D. Strandberg,Timothy C. Zhu,Theodor Vulcan,Michael Solonenko,Carmen Rodriguez,John Chang,Mark P Saunders,Nicole Mason,Stephen M. Hahn +10 more
TL;DR: Comprehensive treatment of the canine prostate with Lu-Tex PDT is feasible using an interstitial alone or combined interstitial and transurethral approach and results in the least amount of toxicity.
Journal ArticleDOI
Intrafractional stability of the prostate using a stereotactic radiotherapy technique
B.L. Madsen,R. Alex Hsi,Huong T. Pham,Joseph Presser,L. Esagui,John M. Corman,L. Myers,Douglas L. Jones +7 more
TL;DR: Stereotactic prostate radiotherapy, utilizing fiducial marker localization, resulted in average intrafractional prostate movement of 2.0 mm or less, and most patient and organ movement occurs early and a settling-in period is advisable before treatment.