Search Results - "Kai, Yudai"

Plan Quality Comparisons Between 3D-CRT, IMRT, and VMAT Based on 4D-CT for Gastric MALT Lymphoma by Matsumoto, Tadashi, Toya, Ryo, Shimohigashi, Yoshinobu, Watakabe, Takahiro, Matsuyama, Tomohiko, Saito, Tetsuo, Fukugawa, Yoshiyuki, Kai, Yudai, Oya, Natsuo

“…Background/Aim: We compared three-dimensional conformal RT (3D-CRT), intensity-modulated radiotherapy (IMRT), and volumetric modulated arc therapy (VMAT) for…”
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Tumor motion changes in stereotactic body radiotherapy for liver tumors: an evaluation based on four-dimensional cone-beam computed tomography and fiducial markers by Shimohigashi, Yoshinobu, Toya, Ryo, Saito, Tetsuo, Ikeda, Osamu, Maruyama, Masato, Yonemura, Keisuke, Nakaguchi, Yuji, Kai, Yudai, Yamashita, Yasuyuki, Oya, Natsuo, Araki, Fujio

“…For stereotactic body radiation therapy (SBRT) of liver tumors, tumor motion induced by respiration must be taken into account in planning and treatment. We…”
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Validation of a method for in vivo 3D dose reconstruction in SBRT using a new transmission detector by Nakaguchi, Yuji, Ono, Takeshi, Maruyama, Masato, Shimohigashi, Yoshinobu, Kai, Yudai

“…Stereotactic body radiation therapy (SBRT) involves the delivery of substantially larger doses over fewer fractions than conventional therapy. Therefore, SBRT…”
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Comparison of rigid and deformable image registration for nasopharyngeal carcinoma radiotherapy planning with diagnostic position PET/CT by Kai, Yudai, Arimura, Hidetaka, Toya, Ryo, Saito, Tetsuo, Matsuyama, Tomohiko, Fukugawa, Yoshiyuki, Shiraishi, Shinya, Shimohigashi, Yoshinobu, Maruyama, Masato, Oya, Natsuo

“…Purpose This observer study aimed to compare rigid image registration (RIR) with deformable image registration (DIR) for diagnostic position (DP) positron…”
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Impact of hybrid FDG-PET/CT on gross tumor volume definition of cervical esophageal cancer: reducing interobserver variation by Toya, Ryo, Matsuyama, Tomohiko, Saito, Tetsuo, Imuta, Masanori, Shiraishi, Shinya, Fukugawa, Yoshiyuki, Iyama, Ayumi, Watakabe, Takahiro, Sakamoto, Fumi, Tsuda, Noriko, Shimohigashi, Yoshinobu, Kai, Yudai, Murakami, Ryuji, Yamashita, Yasuyuki, Oya, Natsuo

“…Abstract Intensity-modulated radiation therapy is being increasingly used to treat cervical esophageal cancer (CEC); however, delineating the gross tumor…”
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Impact of metal artifact reduction algorithm on gross tumor volume delineation in tonsillar cancer: reducing the interobserver variation by Fukugawa, Yoshiyuki, Toya, Ryo, Matsuyama, Tomohiko, Watakabe, Takahiro, Shimohigashi, Yoshinobu, Kai, Yudai, Matsumoto, Tadashi, Oya, Natsuo

“…Patients with tonsillar cancer (TC) often have dental fillings that can significantly degrade the quality of computed tomography (CT) simulator images due to…”
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Impact of four-dimensional cone-beam computed tomography on target localization for gastric mucosa-associated lymphoid tissue lymphoma radiotherapy: reducing planning target volume by Shimohigashi, Yoshinobu, Toya, Ryo, Saito, Tetsuo, Kono, Yumiko, Doi, Yasuhiro, Fukugawa, Yoshiyuki, Watakabe, Takahiro, Matsumoto, Tadashi, Kai, Yudai, Maruyama, Masato, Oya, Natsuo

“…Radiotherapy of gastric mucosa-associated lymphoid tissue (MALT) lymphoma should be delivered to the entire stomach with planning target volume (PTV) that…”
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Commissioning and validation of fluence-based 3D VMAT dose reconstruction system using new transmission detector by Nakaguchi, Yuji, Oono, Takeshi, Maruyama, Masato, Shimohigashi, Yoshinobu, Kai, Yudai, Nakamura, Yuya

“…In this study, we evaluated the basic performance of the three-dimensional dose verification system COMPASS (IBA Dosimetry). This system is capable of…”
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Image quality evaluation of in-treatment four-dimensional cone-beam computed tomography in volumetric-modulated arc therapy for stereotactic body radiation therapy by Shimohigashi, Yoshinobu, Doi, Yasuhiro, Kouno, Yumiko, Yotsuji, Yohei, Maruyama, Masato, Kai, Yudai, Toya, Ryo

“…•Image quality of In-treatment 4D cone-beam CT (In-4D-CBCT) for SBRT was evaluated.•In-4D-CBCT images were compared with pre-4D-CBCT images as a…”
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Stereotactic Body Radiotherapy Based on 99mTc-GSA SPECT Image-guided Inverse Planning for Hepatocellular Carcinoma by KAI, YUDAI, TOYA, RYO, SAITO, TETSUO, MATSUYAMA, TOMOHIKO, FUKUGAWA, YOSHIYUKI, SHIRAISHI, SHINYA, SHIMOHIGASHI, YOSHINOBU, OYA, NATSUO

“…Background/Aim: A recent planning study suggested that 99m Tc-labelled diethylene triamine pentaacetate-galactosyl human serum albumin ( 99m Tc-GSA)…”
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Semi-automated prediction approach of target shifts using machine learning with anatomical features between planning and pretreatment CT images in prostate radiotherapy by Kai, Yudai, Arimura, Hidetaka, Ninomiya, Kenta, Saito, Tetsuo, Shimohigashi, Yoshinobu, Kuraoka, Akiko, Maruyama, Masato, Toya, Ryo, Oya, Natsuo

“…Abstract The goal of this study was to develop a semi-automated prediction approach of target shifts using machine learning architecture (MLA) with anatomical…”
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Effect of metal-containing topical agents on surface doses received during external irradiation by Iyama, Ayumi, Matsuyama, Tomohiko, Matsumoto, Eriko, Araki, Takafumi, Inokuchi, Satoshi, Yamashita, Mizuki, Honda, Noritoshi, Miyake, Taiga, Saito, Tetsuo, Toya, Ryo, Kai, Yudai, Yamashita, Yasuyuki, Oya, Natsuo

“…The ability of topical metal-containing agents (MCAs) to enhance radiation dermatitis remains controversial. In the present study, we evaluated increases in…”
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Validation of fluence‐based 3D IMRT dose reconstruction on a heterogeneous anthropomorphic phantom using Monte Carlo simulation by Nakaguchi, Yuji, Ono, Takeshi, Maruyama, Masato, Nagasue, Nozomu, Shimohigashi, Yoshinobu, Kai, Yudai

“…In this study, we evaluated the performance of a three‐dimensional (3D) dose verification system, COMPASS version 3, which has a dedicated beam models and dose…”
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Four-dimensional cone-beam computed tomography-guided radiotherapy for gastric lymphoma by Toya, Ryo, Saito, Tetsuo, Shimohigashi, Yoshinobu, Yotsuji, Yohei, Matsuyama, Tomohiko, Watakabe, Takahiro, Kai, Yudai, Yamashita, Yasuyuki, Oya, Natsuo

“…Purpose We describe a treatment method with four-dimensional cone-beam computed tomography (4D-CBCT)-guided radiotherapy for gastric lymphoma. Materials and…”
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Impact of Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study by Ryo Toya, Tetsuo Saito, Yudai Kai, Shinya Shiraishi, Tomohiko Matsuyama, Takahiro Watakabe, Fumi Sakamoto, Noriko Tsuda, Yoshinobu Shimohigashi, Yasuyuki Yamashita, Natsuo Oya

“…Purpose: To evaluate the impact of 99m Tc-labeled diethylene triamine pentaacetate-galactosyl human serum albumin ( 99m Tc-GSA) single-photon emission computed…”
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Feasibility of anatomical feature points for the estimation of prostate locations in the Bayesian delineation frameworks for prostate cancer radiotherapy by Ninomiya, Kenta, Arimura, Hidetaka, Sasahara, Motoki, Kai, Yudai, Hirose, Taka-aki, Ohga, Saiji

“…This study aimed to investigate the feasibility of anatomical feature points for the estimation of prostate locations in the Bayesian delineation frameworks…”
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Plan quality and delivery time comparisons between volumetric modulated arc therapy and intensity modulated radiation therapy for scalp angiosarcoma: A planning study by Kai, Yudai, Toya, Ryo, Saito, Tetsuo, Kuraoka, Akiko, Shimohigashi, Yoshinobu, Nakaguchi, Yuji, Maruyama, Masato, Murakami, Ryuji, Yamashita, Yasuyuki, Oya, Natsuo

“…Introduction Due to its spherical surface, scalp angiosarcoma requires careful consideration for radiation therapy planning and dose delivery. Herein, we…”
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Accuracy of dose calculation algorithms for virtual heterogeneous phantoms and intensity-modulated radiation therapy in the head and neck by Onizuka, Ryota, Araki, Fujio, Ohno, Takeshi, Nakaguchi, Yuji, Kai, Yudai, Tomiyama, Yuuki, Hioki, Kazunari

“…This study verified the dose calculation accuracy of the analytical anisotropic algorithm (AAA), Acuros XB version 10 (AXB10), and version 11 (AXB11) installed…”
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Impact of 99mTc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study by Toya, Ryo, Saito, Tetsuo, Kai, Yudai, Shiraishi, Shinya, Matsuyama, Tomohiko, Watakabe, Takahiro, Sakamoto, Fumi, Tsuda, Noriko, Shimohigashi, Yoshinobu, Yamashita, Yasuyuki, Oya, Natsuo

“…Purpose: To evaluate the impact of 99mTc-labeled diethylene triamine pentaacetate-galactosyl human serum albumin (99mTc-GSA) single-photon emission computed…”
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Evaluation of a single‐scan protocol for radiochromic film dosimetry by Shimohigashi, Yoshinobu, Araki, Fujio, Maruyama, Masato, Nakaguchi, Yuji, Kuwahara, Satoshi, Nagasue, Nozomu, Kai, Yudai

“…The purpose of this study was to evaluate a single‐scan protocol using Gafchromic EBT3 film (EBT3) by comparing it with the commonly used 24‐hr measurement…”
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