International Journal of Medical Physics, Clinical Engineering and Radiation Oncology最新文献_第2页

Evaluation of Patient-Specific Quality Assurance for Carbon Ion Radiotherapy Using Full Energy Scanning Method at QST Hospital QST医院全能量扫描法碳离子放疗患者特异性质量保证评价

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.114017

Asami Inomata, M. Katsumata, Sung Hyun Lee, Yuji Suzuki, T. Nakajima, W. Furuichi, Keishi Yamaoka, Atsushi Yamamoto, H. Mizuno, R. Kohno

引用次数: 0

Mass Stopping Power and Range of Protons in Biological Human Body Tissues (Ovary, Lung and Breast) 质子在人体生物组织(卵巢、肺和乳房)中的阻团能力和范围

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.111005

Ahlam S. Almutairi, K. T. Osman

引用次数: 3

Calculation of Mass Stopping Power and Range of Protons as Well as Important Radiation Quantities in Some Biological Human Bodyparts (Water, Muscle, Skeletal and Bone, Cortical) 人体某些生物部位(水、肌肉、骨骼、皮质)中质子的质量阻挡力、范围及重要辐射量的计算

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.112009

Ahlam S. Almutairi, K. T. Osman

{"title":"Calculation of Mass Stopping Power and Range of Protons as Well as Important Radiation Quantities in Some Biological Human Bodyparts (Water, Muscle, Skeletal and Bone, Cortical)","authors":"Ahlam S. Almutairi, K. T. Osman","doi":"10.4236/ijmpcero.2022.112009","DOIUrl":"https://doi.org/10.4236/ijmpcero.2022.112009","url":null,"abstract":"In this work, the electronic mass stopping power and the range of protons in some biological human body parts (Water, Muscle, Skeletal and Bone, Cortical) were calculated in the energy range of protons 0.04 to 200 MeV using the theory of Bethe-Bloch formula as giving in the references. All these calculations were done using Matlab program. The data related to the densities, average atomic number to mass number Z A and excitation energies for the present tissues and substances were collected from ICRU Report 44 (1989). The present results for electronic mass stopping powers and ranges were compared with the data of PSTAR and good agreements were found between them, especially at energies between 1 - 200 MeV for stopping power and 4 - 200 MeV for the range. Also in this study, several important quantities in the field of radiation, such as thickness, linear energy transfer (LET), absorbed dose, equivalent dose, and effective dose of the protons in the given biological human body parts were calculated at protons energy 0.04 - 200 MeV.","PeriodicalId":14028,"journal":{"name":"International Journal of Medical Physics, Clinical Engineering and Radiation Oncology","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83955180","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

Computational and Experimental Approaches for Evaluating Dose under a Block in TBI Geometry 脑损伤几何块下剂量评估的计算与实验方法

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.111007

L. Russell, Jussi K. Sillanpáá

引用次数: 0

Computed Tomography Protocol Optimisation for Pediatric Head Trauma: Radiation Dose and Image Quality Assessment 儿童头部创伤的计算机断层扫描方案优化:辐射剂量和图像质量评估

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.113014

Evelyn Anaafi, M. Boadu, A. Rusandu, Mercy Afadzi Tetteh, Kwame Anokye Amoabeng

引用次数: 0

Quality Assurance in SPECT/CT for Radionuclide Therapy with Lutetium-177 镥-177放射性核素治疗的SPECT/CT质量保证

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.111006

O. Adu-Poku, E. Addison, B. Kwakye-Awuah, S. Inkoom, F. Hasford, Cletus Ahadzie, J. Adom, I. K. Wilson

引用次数: 0

A Statistical Index for Evaluating the CTV Coverage Loss of Brain Stereotactic Radiosurgery When the PTV Margin Is Zero 评价脑立体定向放射手术中PTV切缘为零时CTV覆盖损失的统计指标

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.111008

Jenghwa Chang

{"title":"A Statistical Index for Evaluating the CTV Coverage Loss of Brain Stereotactic Radiosurgery When the PTV Margin Is Zero","authors":"Jenghwa Chang","doi":"10.4236/ijmpcero.2022.111008","DOIUrl":"https://doi.org/10.4236/ijmpcero.2022.111008","url":null,"abstract":"Purpose: To develop a new statistical index “percent CTV (clinical target volume) coverage probability” (%CCP), defined as the probability that a specific percent (e.g., 95%) of the CTV can be reliably covered by the prescription dose, for evaluating the coverage loss of brain (fractionated) stereotactic radiosurgery (SRS/fSRS) when the PTV (planning target volume) margin is zero. Methods: The random variable Q for CTV percent coverage was derived using a previously developed model for CTV random motion that follows a three-dimensional (3D) independent normal distribution with a zero mean and a standard deviation of S σ (for translation) or δ σ (for rotation). Assuming both CTV and PTV are spherical with the same diameter d CTV , the cumulative distribution function of Q could be obtained analytically using the relation of sphere-sphere intersection. The %CCP was then derived as the reliability function of Q and was used to quantify the coverage loss for selected d CTV . Results: The 95% - 95% clinical goal (95% of the times, at least 95% of the CTV is covered) is not achievable with d CTV < 42 mm. For common CTVs (d CTV < 20 mm) encountered in SRS/fSRS, only 60% - 90% of the CTV could be reliably covered by the prescription dose 95% of the time. For 0.5 mm S σ = and 0.4 δ σ =  , the 95% CCP was the highest when the distance between the CTV and the isocenter 0 I T d ⇔ = and gradually decreased with the increasing I T d ⇔ . Conclusions: The %CCP was successfully derived for evaluating the CTV coverage loss for brain SRS/fSRS. When the PTV margin is zero, the 95% - 95% clinical goal cannot be achieved for most targets (d CTV < 42 mm).","PeriodicalId":14028,"journal":{"name":"International Journal of Medical Physics, Clinical Engineering and Radiation Oncology","volume":"23 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83056345","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

Halcyon^TM Acuros XB vs AAA: A RapidArc Planning Comparison for Head & Neck Cancers HalcyonTM acros XB与AAA:头颈癌快速规划比较

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.114016

J. Mbewe, Sakhele Shiba

引用次数: 0

Dosimetric Effect of Cobalt-Chrome Stabilization Hardware in Paraspinal Radiation Treatments 钴铬稳定硬体在椎旁放射治疗中的剂量学效应

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.113015

G. Tang, T. Losasso, S. Lim, Y. Yamada, M. Bilsky, D. Lovelock

引用次数: 1

Application of Statistical Process Control for Setting Action Thresholds as Quality Assurance of Dose Verifications in External Beam Radiotherapy 应用统计过程控制设定动作阈值作为外照射剂量验证的质量保证

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Pub Date : 2022-01-01 DOI: 10.4236/ijmpcero.2022.111003

Philip Kioko Ndonye, S. Tagoe

{"title":"Application of Statistical Process Control for Setting Action Thresholds as Quality Assurance of Dose Verifications in External Beam Radiotherapy","authors":"Philip Kioko Ndonye, S. Tagoe","doi":"10.4236/ijmpcero.2022.111003","DOIUrl":"https://doi.org/10.4236/ijmpcero.2022.111003","url":null,"abstract":"Purpose: To test the concept of Statistical Process Control (SPC) as a Quality Assurance (QA) procedure for dose verifications in external beam radiation therapy in conventional and 3D Conformal Radiotherapy (3D-CRT) treatment of cervical cancer. Materials and Methods: A study of QA verification of target doses of 198 cervical cancer patients undergoing External Beam Radiotherapy (EBRT) treatments at two different cancer treatment centers in Kenya was conducted. The target doses were determined from measured entrance doses by the diode in vivo dosimetry. Process Behavior Charts (PBC) developed by SPC were applied for setting Action Thresholds (AT) on the target doses. The AT set was then proposed as QA limits for acceptance or rejection of verified target doses overtime of the EBRT process. Result and Discussion: Target doses for the 198 patients were calculated and SPC applied to test whether the action limits set by the Process Behavior Charts could be applied as QA for verified doses in EBRT. Results for the two sub-groups of n = 3 and n = 4 that were tested produced action thresholds which are within clinical dose specifications for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. Conclusion: Action thresholds set by SPC were within the clinical dose specification of ±5% uncertainty for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. So the concept of SPC could be applied in setting QA action limits for dose verifications in EBRT.","PeriodicalId":14028,"journal":{"name":"International Journal of Medical Physics, Clinical Engineering and Radiation Oncology","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81795706","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: 1