A5049677961- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Radiomics and Machine Learning in Medical Imaging
- Radiation Therapy and Dosimetry
- Lung Cancer Diagnosis and Treatment
- Medical Imaging and Analysis
- Medical Image Segmentation Techniques
- Radiation Dose and Imaging
- Analog and Mixed-Signal Circuit Design
- AI in cancer detection
- Radiation Detection and Scintillator Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Chemical Sensor Technologies
- Radio Frequency Integrated Circuit Design
- Management of metastatic bone disease
- Testicular diseases and treatments
- Chronic Myeloid Leukemia Treatments
- Sensor Technology and Measurement Systems
- Esophageal Cancer Research and Treatment
- VLSI and Analog Circuit Testing
- Advanced MRI Techniques and Applications
- Cancer Immunotherapy and Biomarkers
- Gastric Cancer Management and Outcomes
- Endometrial and Cervical Cancer Treatments
Kyushu University Hospital
2014-2024
Kyushu University
2012-2023
Department of Medical Sciences
2019
SAGA Heavy Ion Medical Accelerator in Tosu
2015
Nagoya University
2014
Kobe University
2014
Niigata Cancer Center Hospital
2013
Fujitsu (Japan)
2005-2009
Hokkaido University
2006
Abstract This study developed a radiomics-based predictive model for radiation-induced pneumonitis (RP) after lung cancer stereotactic body radiation therapy (SBRT) on pretreatment planning computed tomography (CT) images. For the RP prediction models, 275 non-small-cell patients consisted of 245 training (22 with grade ≥ 2 RP) and 30 test cases (8 were selected. A total 486 radiomic features calculated to quantify texture patterns reflecting tissue reaction within volumes irradiated more...
The setup errors and organ motion pertaining to clinical target volume (CTV) have been considered as two major causes of uncertainties in the determination CTV-to-planning (PTV) margins for prostate cancer radiation treatment planning. We based our study on assumption that interfractional shape variations are not negligible another source uncertainty precise CTV-to-PTV margins. Thus, we investigated CTVs a point distribution model (PDM) therapy.To quantitate CTVs, PDM was applied contours 4...
Abstract The aim of this study was to investigate planning target volume (PTV) margin in online adaptive radiation therapy (oART) for gastric mucosa-associated lymphoid tissue (MALT) lymphomas. Four consecutive patients with MALT lymphoma who received oART (30 Gy 15 fractions) on the system were included study. One hundred and twenty cone-beam computed tomography (CBCT) scans acquired pre- post-treatment 60 fractions all used evaluate intra- interfractional motions. Patients instructed...
The present study compares dosimetric parameters between volumetric-modulated arc therapy (VMAT) and 3D conformal radiation (3D-CRT) in lung tumors adjacent to the chest wall treated with stereotactic body (SBRT). focused on dose of 16 patients who had developed radiation-induced rib fractures (RIRF) after SBRT using 3D-CRT. targets all were partially overlapping fractured ribs, median rib–PTV distance was 0.4 cm. Stereotactic re-planned for patients. prescribed 48 Gy four fractions cover at...
Objectives We aimed to explore the synergistic combination of a topologically invariant Betti number (BN)-based signature and biomarker for accurate prediction symptomatic (grade ≥2) radiation-induced pneumonitis (RP+) before stereotactic ablative radiotherapy (SABR) lung cancer. Methods A total 272 SABR cases with early-stage non-small cell cancer were chosen this study. The occurrence RP+ was predicted using support vector machine (SVM) model trained combined features BN-based extracted...
We have fabricated a 24 GHz power amplifier (PA) module in standard 90-nm Si-CMOS process. The PA consists of two 2-stage cascode configuration MMICs and an off-chip Wilkinson divider combiner. Each single MMIC has gain 22 dB with P <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3dB</sub> output 18.3 dBm at load-pull measurement. demonstrates state-of-the-art performance, including saturation 20.7 linear 20.3 supply voltage 2.4 V. estimated its...
Abstract Purpose There remain uncertainties due to inter‐ and intraobserver variability in soft‐tissue‐based patient positioning even with the use of image‐guided radiation therapy (IGRT). This study aimed reveal observer on cone‐beam computed tomography (CBCT) images for prostate cancer IGRT. Methods Twenty‐six patients (7–8 fractions/patient, total number 204 fractions) who underwent IGRT were selected. Six therapists retrospectively measured location errors (PCLEs) between planning CT...
An ultralow power constant reference current circuit with low temperature dependence for micropower electronic applications is proposed in this paper. This consists of a constant-current subcircuit and bias-voltage subcircuits, it compensates the characteristics mobility thermal voltage VT, threshold V/sub TH/ such way that has small dependence. A SPICE simulation demonstrated total dissipation 97.7nA, 1.1/spl mu/ W, respectively, variation can be kept very within +4% range from -20 to 100...
We developed a novel electrical non-return-to-zero (NRZ) to return-to-zero (RZ) converter circuit based on master-slave D-type flip-flop (D-FF). Its decision and re-timing function makes the without any delay or phase control circuitry, which are usually employed adjust alignment of data clock. The achieved 50-Gbit/s operation by using 0.13 /spl mu/m gate-length InP HEMT technology. supply voltage was -5.2 V power consumption 1.1W. A module with mounted realized 44-Gbit/s operation.
The monitor unit (MU) was calculated by pencil beam convolution (inhomogeneity correction algorithm: batho power law) [PBC (BPL)] which is the dose calculation algorithm based on measurement in past stereotactic lung irradiation study. recalculation done analytical anisotropic (AAA), theory data. MU PBC (BPL) and AAA compared for each field. In result of comparison 1031 fields 136 cases, about 2% smaller than that AAA. This depends whether one does concerning extension second electrons....
To examine the anatomical position of point B and relationship between dose at delivered to pelvic lymph nodes in computed tomography (CT)-based brachytherapy for cervical cancer.Forty-nine cancer patients were treated Kyushu University Hospital. For all cases, planning CT images obtained after applicator insertion imported an Oncentra Brachy (Elekta AB, Stockholm, Sweden), points A (dose prescription, 6 Gy) set according Manchester method. The node regions (external iliac, internal...
Measurement of beam alignment, including an isocenter, is a fundamental part commissioning and quality assurance for medical linear accelerator (linac). An alignment shift caused by the focal spot displacement from axis. In this study, we present procedure analysis positions in radiation using newly developed control tool (QCT) device software.
【目的】4, 6, 10 MV高エネルギー光子線に対する真ちゅう製ボーラスの表面線量，射出線量およびビームプロファイルの基礎特性を検証すること．【方法】真ちゅう製ボーラスと組織等価ボーラスを使用し，4, MV光子線の水等価ファントム中における表面線量とファントム厚さ10 cmにおける射出線量を測定しPDDを算出した．また，ファントム深さ0 cmと10 cmにおけるビームプロファイルを取得した．【結果】真ちゅう製ボーラスありの場合，ボーラスなしの場合と比較して表面線量は4, MVにおいてそれぞれ37.3%, 36.3%, 31.0%増加したが，組織等価ボーラスと比較すると真ちゅう製ボーラス1枚での表面線量は減少した．射出線量は真ちゅう製ボーラスありの場合，ボーラスなしの場合と比較して4, MVにおいてそれぞれ22.0%, 23.1%, 22.8%増加した．【結語】真ちゅう製ボーラスは組織等価ボーラスとは異なる特性をもつことが示された．