Australasian Physical & Engineering Sciences in Medicine最新文献_第4页

Evaluation of dual energy CT and iterative metal artefact reduction (iMAR) for artefact reduction in radiation therapy 双能量CT和迭代金属伪影还原(iMAR)在放射治疗中伪影还原的评价

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-10-10 DOI: 10.1007/s13246-019-00801-1

P. Lim, J. Barber, J. Sykes

引用次数: 9

Evaluation of new hip prosthesis design with finite element analysis 基于有限元分析的新型人工髋关节设计评价

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-10-10 DOI: 10.1007/s13246-019-00802-0

Talip Çelik, Y. Kişioğlu

引用次数: 10

Analysis of hypoxia in human glioblastoma tumors with dynamic 18F-FMISO PET imaging 18F-FMISO动态PET显像对人胶质母细胞瘤缺氧的分析

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-13 DOI: 10.1007/s13246-019-00797-8

Redha-alla Abdo, F. Lamare, P. Fernandez, M. Bentourkia

引用次数: 8

Feasibility of novel in vivo EPID dosimetry system for linear accelerator quality control tests 用于线性加速器质量控制试验的新型体内EPID剂量测定系统的可行性

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-12 DOI: 10.1007/s13246-019-00798-7

F. Biltekin, Y. Yedekci, G. Ozyigit

引用次数: 4

In obstructive sleep apnea patients, automatic determination of respiratory arrests by photoplethysmography signal and heart rate variability 在阻塞性睡眠呼吸暂停患者中，通过光体积描记信号和心率变异性自动确定呼吸停止

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-12 DOI: 10.1007/s13246-019-00796-9

M. R. Bozkurt, M. K. Ucar, Ferda Bozkurt, C. Bilgin

引用次数: 19

APESM statistics and summary of 2017–2018 2017-2018年APESM统计和总结

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-10 DOI: 10.1007/s13246-019-00799-6

J. Trapp

引用次数: 0

Skin and build up dose determination for a 2.5 MV medical linear accelerator imaging beam 2.5 MV医用直线加速器成像束的皮肤和累积剂量测定

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-09 DOI: 10.1007/s13246-019-00792-z

M. Butson, E. Butson, J. Morales, R. Hill

引用次数: 1

A novel local senary pattern based epilepsy diagnosis system using EEG signals 一种新的基于脑电信号的局部senary模式癫痫诊断系统

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-03 DOI: 10.1007/s13246-019-00794-x

T. Tuncer, S. Dogan, Erhan Akbal

引用次数: 35

Characterisation of out-of-field dose at shallow depths for external beam radiotherapy: implications for eye lens dose. 外束放射治疗浅深度场外剂量的特征:对眼晶状体剂量的影响。

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-01 Epub Date: 2019-06-10 DOI: 10.1007/s13246-019-00764-3

Tina C Baradaran, Dean L Cutajar, Yujin Qi, Anna Ralston

{"title":"Characterisation of out-of-field dose at shallow depths for external beam radiotherapy: implications for eye lens dose.","authors":"Tina C Baradaran, Dean L Cutajar, Yujin Qi, Anna Ralston","doi":"10.1007/s13246-019-00764-3","DOIUrl":"https://doi.org/10.1007/s13246-019-00764-3","url":null,"abstract":"Re-evaluation of the eye lens radio-sensitivity by the ICRP in 2011 resulted in a significant reduction of the threshold for lens opacities from 8 Gy to 0.5 Gy. This has led to an increase in concern for eye lens doses from treatment sites further from the eye than previously considered. The aim of this study was to examine the out-of-field dose far from the field edge and develop an effective method to accurately characterise the constituent components of this dose at varying depths. Dose profile scans using a 0.6 cm3 cylindrical ionisation chamber in a motorised water tank were compared with previous studies and displayed good agreement. At points more than 20 cm from the field edge patient scatter becomes insignificant, and the dose is dominated by head leakage and collimator scatter. Point depth-dose measurements made with a Roos parallel plate chamber in solid water at distances of 52 cm and 76 cm from central axis showed that the highest dose is at the surface. Since the sensitive region of the eye can be as shallow as 3 mm, in vivo measurements carried out with a detector with buildup more than 3 mm water equivalent thickness may be underestimating the dose to the lens. It is therefore recommended that for in vivo measurements for the eye lens further than 20 cm from the field edge the detector should have only 3 mm build-up material over the effective point of measurement.","PeriodicalId":55430,"journal":{"name":"Australasian Physical & Engineering Sciences in Medicine","volume":"42 3","pages":"671-676"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s13246-019-00764-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37315695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dose perturbation by metallic biliary stent in external beam radiotherapy of pancreato-biliary cancers. 金属胆道支架在胰胆道癌外束放疗中的剂量扰动。

Australasian Physical & Engineering Sciences in Medicine Pub Date : 2019-09-01 Epub Date: 2019-07-08 DOI: 10.1007/s13246-019-00774-1

Ho Lee, Jeongmin Yoon, Kwangwoo Park, Chai Hong Rim, Moon Jae Chung, Jinsil Seong

{"title":"Dose perturbation by metallic biliary stent in external beam radiotherapy of pancreato-biliary cancers.","authors":"Ho Lee, Jeongmin Yoon, Kwangwoo Park, Chai Hong Rim, Moon Jae Chung, Jinsil Seong","doi":"10.1007/s13246-019-00774-1","DOIUrl":"https://doi.org/10.1007/s13246-019-00774-1","url":null,"abstract":"This study aims to investigate dose perturbations caused by a metallic biliary stent (MBS) in patients undergoing external beam radiotherapy for cancers in the pancreato-biliary region. Four MBSs with nitinol mesh were examined in the EasyCube® phantom including a custom stent holder fabricated by a 3D printer. For experimental models, three-dimensional conformal radiotherapy plans using a single anterior-posterior (AP) and four-field box (4FB) as well as volumetric modulated arc therapy (VMAT) plan were prepared to deliver the photon beam of 8 Gy to the stent holder. EBT3 film was used to measure dose distributions at four sides surrounding MBS. All MBSs in the AP beam demonstrated mean dose enhancements of 2.3-8.2% at the proximal, left, and right sides. Maximum dose enhancements of 12.3-19.5% appeared at regions surrounding the radiopaque markers. At the location distal to the source, there were mean dose reductions of - 3.6 to - 10.9% and minimum doses of - 11.1 to - 9.5%. The mean and maximum doses with the 4FB plan were in the ranges of - 0.1 to 3.6% and 6.7-14.9%, respectively. The VMAT produced mean doses of - 0.9 to 4.8% and maximum doses of 6.0-15.3%. Dose perturbations were observed with maximum and minimum spots near the stent surface. The use of multiple beams including parallel-opposed pairs reduced dose perturbations caused by the nitinol and radiopaque components within the stent. Special attention is required for patients in whom the radiopaque markers are closely located near critical structures or the target volume.","PeriodicalId":55430,"journal":{"name":"Australasian Physical & Engineering Sciences in Medicine","volume":"42 3","pages":"745-756"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s13246-019-00774-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37401839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4