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The commercial cylindrical ionization chamber ionization integration accuracy of dynamically moving fields was evaluated. The ionization chambers were exposed to long (14 cm), narrow (0.6, 1.0, 2.0, and 4.0 cm) 6 MV and 18 MV fields. Rather than rely on the linear accelerator to reproducibly scan across the chamber, the chambers were scanned beneath fixed(More)
: The objective of this study was to determine the risk of peanut allergy in siblings of peanut-allergic children. In 2005-2006, 560 households of children born in 1995 in the province of Manitoba, Canada, were surveyed. The index children (8-to 10-year-olds) were assessed by a pediatric allergist and had skin-prick testing and/or capRAST for peanut(More)
In March 2004, the recommendations of the American Association of Physicists in Medicine ͑AAPM͒ on the interstitial brachytherapy dosimetry using 125 I and 103 Pd were reported in Medical Physics ͓TG-43 Update: Rivard et al., 31, 633–674 ͑2004͔͒. These recommendations include some minor changes in the dose-calculation formalism and a major update of the(More)
While automatic distinction between the two breath phases (inspiration/expiration) can be done easily using lung sounds' intensity, it is challenging to do the same using only tracheal breath sounds. The current acoustic flow estimation methods use tracheal breath sounds to estimate the amount of flow and the onset of breath but also use lung sounds for(More)
We offer this corrigendum as a means to both correct typographical errors and add to the content of the updated AAPM 1 Regarding the typographical errors: 1. In Table XIII on page 651, the unit of the air kerma rate constant for both 125 I and 103 Pd should be ␮Gy· m 2 ·h −1 · MBq −1 instead of ␮Gy· m 2 ·h −1 ·Bq −1 as also incorrectly specified in Table 5(More)
Current breathing flow estimation methods use tracheal breath sounds, but one step of the process, ‘breath phase (inspiration/expiration) detection’, is done by either assuming alternating breath phases or using a second acoustic channel of lung sounds. The alternating assumption is unreliable for long recordings, non-breathing events, such as apnea,(More)
permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver Background: Allergic rhinitis is a major risk factor for asthma(More)
permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver Background: Multiple animal antigens, spores and pollens were collected(More)
This report describes the current state of flattening filter-free (FFF) radiotherapy beams implemented on conventional linear accelerators, and is aimed primarily at practicing medical physicists. The Therapy Emerging Technology Assessment Work Group of the American Association of Physicists in Medicine (AAPM) formed a writing group to assess FFF(More)