Search Results - "Willoughby, Twyla R"

Hypofractionated Intensity-Modulated Radiotherapy (70 Gy at 2.5 Gy Per Fraction) for Localized Prostate Cancer: Cleveland Clinic Experience by Kupelian, Patrick A., M.D, Willoughby, Twyla R., M.S, Reddy, Chandana A., M.S, Klein, Eric A., M.D, Mahadevan, Arul, M.D

“…Purpose: To study the outcomes in patients treated for localized prostate cancer with 70 Gy delivered at 2.5-Gy/fraction within 5 weeks. Methods and Materials:…”
Get full text

Observations on Real-Time Prostate Gland Motion Using Electromagnetic Tracking by Langen, Katja M., Ph.D, Willoughby, Twyla R., M.S, Meeks, Sanford L., Ph.D, Santhanam, Anand, Ph.D, Cunningham, Alexis, B.A, Levine, Lisa, Ph.D, Kupelian, Patrick A., M.D

“…Purpose To quantify and describe the real-time movement of the prostate gland in a large data set of patients treated with radiotherapy. Methods and Materials…”
Get full text

Real-Time Tumor Tracking in the Lung Using an Electromagnetic Tracking System by Shah, Amish P., PhD, Kupelian, Patrick A., MD, Waghorn, Benjamin J., PhD, Willoughby, Twyla R., MS, Rineer, Justin M., MD, Mañon, Rafael R., MD, Vollenweider, Mark A., MD, Meeks, Sanford L., PhD

“…Purpose To describe the first use of the commercially available Calypso 4D Localization System in the lung. Methods and Materials Under an institutional review…”
Get full text

Evaluation of image-guidance protocols in the treatment of head and neck cancers by Zeidan, Omar A., Ph.D, Langen, Katja M., Ph.D, Meeks, Sanford L., Ph.D, Manon, Rafael R., M.D, Wagner, Thomas H., Ph.D, Willoughby, Twyla R., M.S, Jenkins, D. Wayne, M.D, Kupelian, Patrick A., M.D

“…Purpose: The aim of this study was to assess the residual setup error of different image-guidance (IG) protocols in the alignment of patients with head and…”
Get full text

Influence of intrafraction motion on margins for prostate radiotherapy by Litzenberg, Dale W, Balter, James M, Hadley, Scott W, Sandler, Howard M, Willoughby, Twyla R, Kupelian, Patrick A, Levine, Lisa

“…To assess the impact of intrafraction intervention on margins for prostate radiotherapy. Eleven supine prostate patients with three implanted transponders were…”
Get more information

Implantation and Stability of Metallic Fiducials Within Pulmonary Lesions by Kupelian, Patrick A., M.D, Forbes, Alan, M.D., Ph.D, Willoughby, Twyla R., M.S, Wallace, Karen, M.D, Mañon, Rafael R., M.D, Meeks, Sanford L., Ph.D, Herrera, Luis, M.D, Johnston, Alan, M.D, Herran, Juan J., M.D

“…Purpose To report and describe implantation techniques and stability of metallic fiducials in lung lesions to be treated with external beam radiotherapy…”
Get full text

An evaluation of intrafraction motion of the prostate in the prone and supine positions using electromagnetic tracking by Shah, Amish P, Kupelian, Patrick A, Willoughby, Twyla R, Langen, Katja M, Meeks, Sanford L

“…Abstract Purpose To evaluate differences in target motion during prostate irradiation in the prone versus supine position using electromagnetic tracking to…”
Get full text

Image-Guided Radiotherapy for Localized Prostate Cancer: Treating a Moving Target by Kupelian, Patrick A., MD, Langen, Katja M., PhD, Willoughby, Twyla R., MS, Zeidan, Omar A., PhD, Meeks, Sanford L., PhD

“…Prostate motion during external-beam radiotherapy can affect outcomes in patients with localized prostate cancer. Prostate motion and deformation are currently…”
Get full text

Serial megavoltage CT imaging during external beam radiotherapy for non-small-cell lung cancer: observations on tumor regression during treatment by Kupelian, Patrick A, Ramsey, Chester, Meeks, Sanford L, Willoughby, Twyla R, Forbes, Alan, Wagner, Thomas H, Langen, Katja M

“…The ability to obtain soft-tissue imaging in the treatment room, such as with megavoltage CT imaging, enables the observation of tumor regression during a…”
Get more information

Dosimetric Consequences of Intrafraction Prostate Motion by Li, Haisen S., Ph.D, Chetty, Indrin J., Ph.D, Enke, Charles A., M.D, Foster, Ryan D., Ph.D, Willoughby, Twyla R., M.Sc, Kupellian, Patrick A., M.D, Solberg, Timothy D., Ph.D

“…Purpose To analyze characteristics of intrafraction prostate motion, monitored using the Calypso system, and investigate dosimetric consequences of the motion…”
Get full text

Evaluation of Image-Guidance Strategies in the Treatment of Localized Prostate Cancer by Kupelian, Patrick A., M.D, Lee, Choonik, Ph.D, Langen, Katja M., Ph.D, Zeidan, Omar A., Ph.D, Mañon, Rafael R., M.D, Willoughby, Twyla R., M.S, Meeks, Sanford L., Ph.D

“…Purpose To compare different image-guidance strategies in the alignment of prostate cancer patients. Using data from patients treated using daily image…”
Get full text

Performance characterization of megavoltage computed tomography imaging on a helical tomotherapy unit by Meeks, Sanford L., Harmon, Joseph F., Langen, Katja M., Willoughby, Twyla R., Wagner, Thomas H., Kupelian, Patrick A.

“…Helical tomotherapy is an innovative means of delivering IGRT and IMRT using a device that combines features of a linear accelerator and a helical computed…”
Get full text

Characterization and use of EBT radiochromic film for IMRT dose verification by Zeidan, Omar A., Stephenson, Stacy Ann L., Meeks, Sanford L., Wagner, Thomas H., Willoughby, Twyla R., Kupelian, Patrick A., Langen, Katja M.

“…We present an evaluation of a new and improved radiochromic film, type EBT, for its implementation to IMRT dose verification. Using a characterized flat bed…”
Get full text

Impact of Image Guidance on Outcomes After External Beam Radiotherapy for Localized Prostate Cancer by Kupelian, Patrick A., M.D, Willoughby, Twyla R., M.S, Reddy, Chandana A., M.S, Klein, Eric A., M.D, Mahadevan, Arul, M.D

“…Purpose To verify whether rectal distention at the time of planning impacts outcomes in patients with localized prostate cancer treated with daily image…”
Get full text

Orthogonal image pairs coupled with OSMS for noncoplanar beam angle, intracranial, single-isocenter, SRS treatments with multiple targets on the Varian Edge radiosurgery system by Oliver, Jasmine A., PhD, Kelly, Patrick, MD, Meeks, Sanford L., PhD, Willoughby, Twyla R., PhD, Shah, Amish P., PhD

“…Abstract Purpose To characterize the accuracy of noncoplanar image guided radiation therapy with the Varian Edge radiosurgery system for intracranial…”
Get full text

Dosimetric Effect of Prostate Motion During Helical Tomotherapy by Langen, Katja M., Ph.D, Lu, Weiguo, Ph.D, Willoughby, Twyla R., M.S, Chauhan, Bhavin, B.S, Meeks, Sanford L., Ph.D, Kupelian, Patrick A., M.D, Olivera, Gustavo, Ph.D

“…Purpose To assess the dosimetric consequence of intrafraction prostate motion on helical tomotherapy plans. Methods and Materials An electromagnetic tracking…”
Get full text

Expanding the use of real‐time electromagnetic tracking in radiation oncology by Shah, Amish P., Kupelian, Patrick A., Willoughby, Twyla R., Meeks, Sanford L.

“…In the past 10 years, techniques to improve radiotherapy delivery, such as intensity‐modulated radiation therapy (IMRT), image‐guided radiation therapy (IGRT)…”
Get full text

Preliminary observations on biochemical relapse-free survival rates after short-course intensity-modulated radiotherapy (70 Gy at 2.5 Gy/fraction) for localized prostate cancer by Kupelian, Patrick A, Reddy, Chandana A, Carlson, Thomas P, Altsman, Kimberley A, Willoughby, Twyla R

“…To compare the preliminary biochemical relapse-free survival rates between short-course intensity-modulated radiotherapy (SCIM-RT) delivering 70 Gy in 28…”
Get more information

Positional Stability of Electromagnetic Transponders Used for Prostate Localization and Continuous, Real-Time Tracking by Litzenberg, Dale W., Ph.D, Willoughby, Twyla R., M.Sc, Balter, James M., Ph.D, Sandler, Howard M., M.D, Wei, John, M.D, Kupelian, Patrick A., M.D, Cunningham, Alexis A., B.A, Bock, Andrea, Ph.D, Aubin, Michele, M.Sc, Roach, Mack, M.D, Shinohara, Katsuto, M.D, Pouliot, Jean, Ph.D

“…Purpose: To determine the relative positional stability of implanted glass-encapsulated circuits (transponders) used in continuous electromagnetic localization…”
Get full text

Short-course intensity-modulated radiotherapy (70 GY at 2.5 GY per fraction) for localized prostate cancer: preliminary results on late toxicity and quality of life by Kupelian, P A, Reddy, C A, Klein, E A, Willoughby, T R

“…To present our preliminary observations on the late toxicity and quality of life (QOL) of patients treated with short-course intensity-modulated radiotherapy…”
Get more information