Medical Physics

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Abnormal lung quantification in chest CT images of COVID‐19 patients with deep learning and its application to severity prediction
Medical Physics - Tập 48 Số 4 - Trang 1633-1645 - 2021
Fei Shan, Yaozong Gao, Jun Wang, Weiya Shi, Nannan Shi, Meisheng Han, Zhong Xue, Dinggang Shen, Yuxin Shi
ObjectiveComputed tomography (CT) provides rich diagnosis and severity information of COVID‐19 in clinical practice. However, there is no computerized tool to automatically delineate COVID‐19 infection regions in chest CT scans for quantitative assessment in advanced applications such as severity prediction. The aim of this study was to develop a deep lea...... hiện toàn bộ
A dosimetric uncertainty analysis for photon‐emitting brachytherapy sources: Report of AAPM Task Group No. 138 and GEC‐ESTRO
Medical Physics - Tập 38 Số 2 - Trang 782-801 - 2011
Larry A. DeWerd, Geoffrey S. Ibbott, Ali S. Meigooni, Michael G. Mitch, Mark J. Rivard, Kurt E. Stump, Bruce Thomadsen, Jack Venselaar
This report addresses uncertainties pertaining to brachytherapy single‐source dosimetry preceding clinical use. The International Organization for Standardization (ISO) Guide to the Expression of Uncertainty in Measurement (GUM) and the National Institute of Standards and Technology (NIST) Technical Note 1297 are taken as reference standards for uncertainty formalism. Uncertainties in usin...... hiện toàn bộ
Analysis of outcomes in radiation oncology: An integrated computational platform
Medical Physics - Tập 36 Số 5 - Trang 1680-1689 - 2009
Dezhi Liu, M. Ajlouni, Jian‐Yue Jin, Samuel Ryu, Farzan Siddiqui, Assem Patel, Benjamin Movsas, Indrin J. Chetty
Radiotherapy research and outcome analyses are essential for evaluating new methods of radiation delivery and for assessing the benefits of a given technology on locoregional control and overall survival. In this article, a computational platform is presented to facilitate radiotherapy research and outcome studies in radiation oncology. This computational platform consists of (1) an infras...... hiện toàn bộ
A radiobiological basis for bioeffect planning
Medical Physics - Tập 27 Số 11 - Trang 2637-2637 - 2000
David R. Wigg
The main purpose of this thesis is to encourage the development of bioeffect planning as an experimental tool by which means bioeffect plans may be compared with standard isodose plans. The limitations of isodose planning become apparent in many common clinical circumstances when such comparisons can be made. Most of this thesis addresses the fundamental problems of the derivation of usefu...... hiện toàn bộ
Comments on “Sampling techniques for the evaluation of treatment plans” [Med. Phys. 20, 151–161 (1993)]
Medical Physics - Tập 20 Số 5 - Trang 1377-1380 - 1993
Andrzej Niemierko, Michael Goitein
Robust calculation of effective atomic numbers: The Auto‐Zeff software
Medical Physics - Tập 39 Số 4 - Trang 1769-1778 - 2012
M. L. Taylor, R. L. Smith, F. Dossing, Rick Franich
Purpose:The most appropriate method of evaluating the effective atomic number necessitates consideration of energy‐dependent behavior. Previously, this required quite laborious calculation, which is why many scientists revert to over‐simplistic power‐law methods. The purpose of this work is to develop user‐friendly software for the ...... hiện toàn bộ
Effective atomic numbers of composite materials for total and partial interaction processes for photons, electrons, and protons
Medical Physics - Tập 24 Số 6 - Trang 883-885 - 1997
S. Guru Prasad, K. Parthasaradhi, William D. Bloomer
Nén hiệu quả hình ảnh y tế 3D cho các can thiệp từ xa thông qua CNN và lọc khuếch tán dị hướng Dịch bởi AI
Medical Physics - Tập 48 Số 6 - Trang 2877-2890 - 2021
Luu Manh Ha, Theo van Walsum, Daniel Franklin, Phuong Cam Pham, Luu Dang Vu, Adriaan Moelker, Marius Staring, Xiem VanHoang, Wiro J. Niessen, Nguyen Linh-Trung
Mục đíchSự nén hình ảnh hiệu quả trong khi vẫn giữ lại chất lượng hình ảnh có khả năng tạo ra bước đột phá lớn cho việc chẩn đoán và điều trị lâm sàng từ xa, vì điều kiện kết nối Internet kém thường là rào cản chính trong các dịch vụ này. Bài báo này trình bày một khuôn khổ nén hình ảnh theo từng cơ quan cho các can thiệp từ xa dựa trên phương pháp học sâ...... hiện toàn bộ
A practical method to measure the MTF of CT scanners
Medical Physics - Tập 9 Số 5 - Trang 758-760 - 1982
Ronald T. Droege, Richard L. Morin
A method has been devised which enables the modulation transfer function (MTF) of computerized tomographic (CT) scanners to be simply and rapidly determined. The method relies upon the measurement of the standard deviation of the pixel values within the image of cyclic bar patterns. The method is shown to produce results which are indistinguishable from those derived by less practical conv...... hiện toàn bộ
The use and QA of biologically related models for treatment planning: Short report of the TG-166 of the therapy physics committee of the AAPM
Medical Physics - Tập 39 Số 3 - Trang 1386-1409 - 2012
X. Allen Li, M. Alber, Joseph O. Deasy, Andrew Jackson, Kyung‐Wook Jee, Lawrence B. Marks, Mary K. Martel, Charles S. Mayo, Vitali Moiseenko, A E Nahum, Andrzej Niemierko, Vladimir A. Semenenko, Ellen Yorke
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