Results 181 to 190 of about 804,721 (400)

A modified algebraic reconstruction technique taking refraction into account with an application in terahertz tomography [PDF]

arXiv, 2016
Terahertz (THz) tomography is a rather novel technique for nondestructive testing that is particularly suited for the testing of plastics and ceramics. Previous publications showed a large variety of conventional algorithms adapted from computed tomography or ultrasound tomography which were directly applied to THz tomography.
arxiv  

Comparison of localization performance with implanted fiducial markers and cone-beam computed tomography for on-line image-guided radiotherapy of the prostate [PDF]

, 2007
D Moseley, Elizabeth A. White, Kirsty Wiltshire, Tara Rosewall, Michael B. Sharpe, Jeffrey H. Siewerdsen, Jean-Pierre Bissonnette, Mary Gospodarowicz, Padraig Warde, Charles Catton, David A. Jaffray   +10 more
openalex   +1 more source

Using deep learning generated CBCT contours for online dose assessment of prostate SABR treatments

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Prostate Stereotactic Ablative Body Radiotherapy (SABR) is an ultra‐hypofractionated treatment where small setup errors can lead to higher doses to organs at risk (OARs). Although bowel and bladder preparation protocols reduce inter‐fraction variability, inconsistent patient adherence still results in OAR variability.
Conor Sinclair Smith, Isabelle Gagne, Karl Otto, Carter Kolbeck, Joshua Giambattista, Abraham Alexander, Sonja Murchison, Andrew Pritchard, Erika Chin   +8 more
wiley   +1 more source

A post‐reconstruction method to correct cupping artifacts in cone beam breast computed tomography [PDF]

, 2007
M. Altunbaş, C Shaw, L Chen, C Lai, X. Liu, Tao Han, T Wang   +6 more
openalex   +1 more source

Improving dose delivery in non‐coplanar cranial SRS: Stereoscopic x‐ray‐guided mitigation of table walkout errors

Journal of Applied Clinical Medical Physics, EarlyView.
Purpose Linear accelerator (LINAC)‐based single‐isocenter multi‐target (SIMT) treatment has streamlined the cranial stereotactic radiosurgery (SRS) workflow. Though efficient, SIMT delivery adds additional challenges that should be considered, including increased sensitivity to rotational errors for off‐isocenter targets.
Yohan A. Walter, Philip F. Durham, Anne N. Hubbard, William E. Burrell, Hsinshun T. Wu   +4 more
wiley   +1 more source

Observation of Interfractional Variations in Lung Tumor Position Using Respiratory Gated and Ungated Megavoltage Cone-Beam Computed Tomography [PDF]

, 2007
Jenghwa Chang, G Mageras, Ellen Yorke, Fernando De Arruda, Jussi Sillanpaa, Kenneth E. Rosenzweig, Agung Hertanto, Hai Pham, E. Seppi, Alex Pevsner, Charlotte Ling, Howard Amols   +11 more
openalex   +1 more source

Accounting for TLD response to CBCT protocols in external beam radiotherapy dose monitoring

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose LiF thermoluminescent dosimeters (TLDs) are commonly used in radiation therapy to verify the delivered dose. Examples include dose verification for complicated treatment setups or cardiovascular implantable electronic devices (CIEDs). TLDs may be present for both the pre‐treatment imaging kilovoltage (kV) beam and the megavoltage (MV ...
Andrew J. White, Cliff G. Hammer, Matthew W. Brenner, Larry A. DeWerd, Kurt E. Stump, Wesley S. Culberson   +5 more
wiley   +1 more source

How image quality affects determination of target displacement when using kilovoltage cone‐beam computed tomography [PDF]

, 2007
Seungjong Oh, Siyong Kim, Tae‐Suk Suh
openalex   +1 more source

An investigation into the feasibility and efficacy of stereotactic radiosurgery for 1–3 cm single brain lesions on the ring‐mounted Halcyon LINAC

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose An evaluation of the accuracy, safety, and efficiency of the Halcyon ring delivery system (RDS) for stereotactic radiosurgery (SRS) treatment to relatively small (1–3 cm) brain lesions. Methods After completing the extensive in‐house quality assurance checks including Winston–Lutz test and independent dose verification via MD Anderson ...
Kate Hazelwood, Shane McCarthy, Josh Misa, David Castelvetere, William St. Clair, Damodar Pokhrel   +5 more
wiley   +1 more source

Study of Interfractional and Intrafractional Set-up Errors in Radiotherapy Utilizing KV Cone Beam Computed Tomography [PDF]

, 2007
Feng Xu, Shengjie Bai, H. Zhang, J. Wang, Youling Gong, Yanrong Li, Qian-An Jiang   +6 more
openalex   +1 more source