Results 231 to 240 of about 1,576,634 (357)

Impact of acceleration treatment on treatment plan and delivery qualities in tomotherapy for lung cancer

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background Acceleration treatment (AT) is a novel treatment planning parameter introduced in the tomotherapy‐dedicated treatment planning system, Precision. This study explores the effects of AT on tomotherapy plans using helical (TomoHelical) and direct (TomoDirect) irradiation techniques.
Ryosuke Shirata, Tatsuya Inoue, Yugo Ebinuma, Akihiro Yamano, Takayuki Yagihashi, Hironori Nagata, Yumiko Minagawa, Yuki Mukai, Akiko Sato, Motoko Omura   +9 more
wiley   +1 more source

The Prognostic Value of Number of Metastatic Lymph Nodes in Colorectal Cancer-Using Cox's Proportional Hazard Model-

, 2006
Akira Tsunoda, K. Nakao, G. Kamiyama, Keisuke Hiratsuka, Kentaro Narita, K Yamazaki, M. Watanabe, Norihiro Suzuki, T. Ohnoaka, Hiroshi Tanizaki, N Yasuda, Mitsuo Kusano   +11 more
openalex   +2 more sources

Assessing the rigidity of thermoplastic masks for head immobilization effectiveness in stereotactic radiosurgery

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract This study compared three Brainlab thermoplastic masks—Cranial 4pi basic, stereotactic (Close Mask V2), and open‐face—to see how well they limited head movement during Stereotactic Radiosurgery (SRS). Using a head phantom, we tested rotational movements (pitch, yaw, and roll) and measured displacements with the ExacTrac system.
Iris Pasion Apale, Adam Agnew, Daniel Foley   +2 more
wiley   +1 more source

A Hybrid Approach for the Stratified Mark-Specific Proportional Hazards Model with Missing Covariates and Missing Marks, with Application to Vaccine Efficacy Trials. [PDF]

J R Stat Soc Ser C Appl Stat, 2020
Sun Y, Qi L, Heng F, Gilbert PB.
europepmc   +1 more source

IMPACT OF IGNORING PROGNOSTIC FACTORS ON THE ESTIMATE OF TREATMENT EFFECT USING COX PROPORTIONAL HAZARDS MODEL.

, 2006
NULL AUTHOR_ID
openalex   +1 more source

Bayesian Variable Selection in Semiparametric Proportional Hazards Model for High Dimensional Survival Data [PDF]

, 2011
Kyu Ha Lee, Sounak Chakraborty, Jianguo Sun   +2 more
openalex   +1 more source

Impact of bulk density assignment of bone on MRI‐based abdominal region radiotherapy planning for MR‐linac workflow

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose The purpose of the present study was to evaluate the impact of bone relative electron density (rED) assignment on radiotherapy planning for the abdominal region. Methods Twenty patients who received abdominal radiotherapy using MR‐Linac and underwent magnetic resonance imaging (MRI) and computed tomography (CT) simulation were analyzed.
Kota Abe, Masato Tsuneda, Yukio Fujita, Yukinao Abe, Takashi Uno   +4 more
wiley   +1 more source

An extended proportional hazards model for interval-censored data subject to instantaneous failures. [PDF]

Lifetime Data Anal, 2020
Withana Gamage PW, Chaudari M, McMahan CS, Kim EH, Kosorok MR.   +4 more
europepmc   +1 more source

Monte Carlo modeling of radiation dose from radiation therapy with superficial x‐rays

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Reham Barghash, Tiffany W. Martin, Amber R. Prebble, Del Leary   +3 more
wiley   +1 more source

Efficient estimation for the proportional hazards model with bivariate current status data

, 2007
Lianming Wang, Jianguo Sun, Xingwei Tong
openalex   +2 more sources