Now showing items 1-17 of 17

    • Ab initiostudies of the phase transitions inK2SeO4 

      Lu, Hsiao-ming; Hardy, J. R. (American Physical Society (APS), 1990)
      An ab initio model is developed for the potentials in ionic molecular solids in which the electron covalency within the molecular ions substantially affects the interionic interactions. By treating the intermolecular and ...
    • Assessing Residual Motion for Gated Proton-Beam Radiotherapy 

      Sharp, Gregory C.; Lu, Hsiao-ming; Trofimov, Alexei V.; Tang, Xiaoli; Jiang, Steve B.; Turcotte, Julie; Gierga, David P.; Chen, George T. Y.; Hong, Theodore Sunki (Oxford University Press (OUP), 2007)
      Gated radiation therapy is a promising method for improving the dose conformality of treatments to moving targets and reducing the total volume of irradiated tissue. Target motion is of particular concern in proton beam ...
    • The effect of anterior proton beams in the setting of a prostate-rectum spacer 

      Christodouleas, John P.; Tang, Shikui; Susil, Robert C.; McNutt, Todd R.; Song, Danny Y.; Bekelman, Justin; Deville, Curtiland; Vapiwala, Neha; DeWeese, Theodore L.; Lu, Hsiao-ming; Both, Stefan (Elsevier BV, 2013)
      Studies suggest that anterior beams with in vivo range verification would improve rectal dosimetry in proton therapy for prostate cancer. We investigated whether prostate-rectum spacers would enhance or diminish the benefits ...
    • Effects of Interfractional Anatomical Changes on Water-Equivalent Pathlength in Charged-Particle Radiotherapy of Lung Cancer 

      Mori, Shinichiro; Lu, Hsiao-ming; Wolfgang, John A.; Choi, Noah Chan H; Chen, George T. Y. (Oxford University Press (OUP), 2009)
      Intrafractional motion and interfractional changes affect the accuracy of the delivered dose in radiotherapy, particularly in charged-particle radiotherapy. Most recent studies are focused on intrafractional motion ...
    • First-principles simulations of ionic molecular solids: The phase transitions inK2SeO4 

      Lu, Hsiao-ming; Hardy, J. R. (American Physical Society (APS), 1990)
      We present a new approach to first-principles simulations of the statics and dynamics of ionic molecular crystals. It is shown that the new method gives very realistic simulations of the phase transitions in K2Se04 and ...
    • First-principles study of phase transitions inKNO3 

      Lu, Hsiao-ming; Hardy, J. R. (American Physical Society (APS), 1991)
      We report a first-principles simulation study of phase transitions in KNO3, using our recently developed method for treating ionic molecular solids. With the interionic potentials calculated from ab initio electron charge ...
    • First-principles study of the lattice dynamics ofK2SO4 

      Liu, D.; Lu, Hsiao-ming; Ullman, F. G.; Hardy, J. R. (American Physical Society (APS), 1991)
      Using a newly developed first-principles approach to simulations of ionic molecular crystals, we performed static relaxation, molecular-dynamics simulation, and lattice-dynamics calculations, and measurements of the Raman ...
    • Interfractional Variations in the Setup of Pelvic Bony Anatomy and Soft Tissue, and Their Implications on the Delivery of Proton Therapy for Localized Prostate Cancer 

      Trofimov, Alexei V.; Nguyen, Paul Linh; Efstathiou, Jason Alexander; Wang, Yi; Lu, Hsiao-ming; Engelsman, Martijn; Merrick, Scott; Cheng, Chee-Wai; Wong, James R.; Zietman, Anthony (Elsevier BV, 2011)
      Purpose To quantify daily variations in the anatomy of patients undergoing radiation therapy for prostate carcinoma, to estimate their effect on dose distribution, and to evaluate the effectiveness of current standard ...
    • Lattice- and molecular-dynamics studies of phase transitions inCsLiSO4 

      Katkanant, V.; Lu, Hsiao-ming; Hardy, J. R. (American Physical Society (APS), 1992)
      We report results of a simulation of the phase transitions in CsLiSO4. These are based on our previously developed method for calculating parameter-free potential-energy surface for ionic molecular crystals. Our lattice-dynamical ...
    • Lifetime Increased Cancer Risk in Mice Following Exposure to Clinical Proton Beam–Generated Neutrons 

      Gerweck, Leo Edward; Huang, Peigen; Lu, Hsiao-ming; Paganetti, Harald; Zhou, Yenong (Elsevier BV, 2014)
      Purpose To evaluate the lifespan and risk of cancer following whole-body exposure of mice to neutrons generated by a passively scattered clinical SOBP proton beam. Methods and Materials Three hundred young adult ...
    • Phase transitions inK2ZnCl4 

      Lu, Hsiao-ming; Hardy, J. R. (American Physical Society (APS), 1992)
      It is shown that the potential-energy surface in K2ZnCl4 contains a double-well structure, very similar to some of the other A2BX4 compounds (e.g., K2SeO4, Rb2ZnCl4), except that the double well is much deeper and broader, ...
    • A prospective feasibility study of respiratory-gated proton beam therapy for liver tumors 

      Hong, Theodore Sunki; Delaney, Thomas F.; Mamon, Harvey Jay; Willett, Christopher G.; Yeap, Beow Yong; Niemierko, Andrzej; Wolfgang, John A.; Lu, Hsiao-ming; Adams, Judith; Weyman, Elizabeth A.; Arellano, Ronald Steven; Blaszkowsky, Lawrence Scott; Allen, Jill; Tanabe, Kenneth Kenji; Ryan, David P.; Zhu, Andrew Xiuxuan (Elsevier BV, 2014)
      Purpose To evaluate the feasibility of a respiratory-gated proton beam therapy for liver tumors. Materials and Methods Fifteen patients were enrolled on a prospective IRB-approved protocol. Eligibility criteria ...
    • Proton radiotherapy for chest wall and regional lymphatic radiation; dose comparisons and treatment delivery 

      MacDonald, Shannon Michelle; Jimenez, Rachel Beth; Paetzold, Peter; Adams, Judith; Beatty, Jonathan; Delaney, Thomas F.; Kooy, Hanne M.; Taghian, Alphonse G.; Lu, Hsiao-ming (BioMed Central, 2013)
      Purpose The delivery of post-mastectomy radiation therapy (PMRT) can be challenging for patients with left sided breast cancer that have undergone mastectomy. This study investigates the use of protons for PMRT in selected ...
    • Raman scattering and lattice-dynamical calculations of alkali-metal sulfates 

      Liu, D.; Lu, Hsiao-ming; Hardy, J. R.; Ullman, F. G. (American Physical Society (APS), 1991)
      Raman-scattering measurements on single crystals of K2SO4, Rb2SO4, and Cs2SO4 have been made at both room and liquid-nitrogen temperatures. Lattice-dynamical calculations, based on a rigid-ion model using the Gordon-Kim ...
    • Simulations of phase transitions in Rb2ZnCl4 

      Lu, Hsiao-ming; Hardy, J. (American Physical Society (APS), 1992)
      Structural relaxations, molecular-dynamics simulations, and lattice-dynamics calculations were performed to study the phase transitions in Rb2ZnCl4, using intermolecular and intramolecular potentials generated from ab ...
    • Uncertainties and correction methods when modeling passive scattering proton therapy treatment heads with Monte Carlo 

      Bednarz, Bryan; Lu, Hsiao-ming; Engelsman, Martijn; Paganetti, Harald (IOP Publishing, 2011)
      Monte Carlo models of proton therapy treatment heads are being used to improve beam delivery systems and to calculate the radiation field for patient dose calculations. The achievable accuracy of the model depends on the ...
    • Using CBCT for pretreatment range check in proton therapy: a phantom study for prostate treatment by anterior-posterior beam 

      Bentefour, El Hassane; Both, Stefan; Tang, Shikui; Lu, Hsiao-ming (Wiley-Blackwell, 2015)
      This study explores the potential of cone-beam computed tomography (CBCT) for monitoring relative beam range variations due to daily changes in patient anatomy for prostate treatment by anterior proton beams. CBCT was used ...