Charles E. Willis
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View article: AAPM task group report 305: Guidance for standardization of vendor‐neutral reject analysis in radiography
AAPM task group report 305: Guidance for standardization of vendor‐neutral reject analysis in radiography Open
Reject rate analysis is considered an integral part of a diagnostic radiography quality control (QC) program. A rejected image is a patient radiograph that was not presented to a radiologist for diagnosis and that contributes unnecessary r…
View article: Supplemental Material to AAPM Task Group Report 305: Proposed IHE Profile
Supplemental Material to AAPM Task Group Report 305: Proposed IHE Profile Open
This document is supplemental to the American Association of Physicists in Medicine (AAPM) Task Group Report 305, which was published in the Journal of Applied Clinical Medical Physics (DOI: 10.1002/acm2.13938). It contains a proposed Inte…
View article: A Review of Magnetic Shielding Technology for Space Radiation
A Review of Magnetic Shielding Technology for Space Radiation Open
The space radiation environment outside the protection of the Earth’s magnetosphere is severe and difficult to shield against. The cumulative effective dose to astronauts on a typical Mars mission would likely introduce risk exceeding perm…
View article: Evaluating bone marrow dosimetry with the addition of bone marrow structures to the medical internal radiation dose phantom
Evaluating bone marrow dosimetry with the addition of bone marrow structures to the medical internal radiation dose phantom Open
Background Reliable estimates of radiation dose to bone marrow are critical to understanding the risk of radiation‐induced cancers. Although the medical internal radiation dose phantom is routinely used for dose estimation, bone marrow is …
View article: Acceptance Testing and Quality Control of Digital Radiographic Imaging Systems
Acceptance Testing and Quality Control of Digital Radiographic Imaging Systems Open
Charge: The formal charge of American Association of Physicists in Medicine (AAPM) Task Group 150 (TG-150) was “This group will outline a set of tests to be used in the Acceptance Testing and Quality Control of Digital Radiographic Imaging…
View article: Current state of practice regarding digital radiography exposure indicators and deviation indices: Report of <scp>AAPM</scp> Imaging Physics Committee Task Group 232
Current state of practice regarding digital radiography exposure indicators and deviation indices: Report of <span>AAPM</span> Imaging Physics Committee Task Group 232 Open
Beginning with the advent of digital radiography systems in 1981, manufacturers of these systems provided indicators of detector exposure. These indicators were manufacturer‐specific, and users in facilities with equipment from multiple ma…
View article: Medical physics 3.0 versus 1.0: A case study in digital radiography quality control
Medical physics 3.0 versus 1.0: A case study in digital radiography quality control Open
Purpose The study illustrates how a renewed approach to medical physics, Medical Physics 3.0 ( MP 3.0), can identify performance decrement of digital radiography ( DR ) systems when conventional Medical Physics 1.0 ( MP 1.0) methods fail. …
View article: Evaluation of cassette‐based digital radiography detectors using standardized image quality metrics: AAPM TG‐150 Draft Image Detector Tests
Evaluation of cassette‐based digital radiography detectors using standardized image quality metrics: AAPM TG‐150 Draft Image Detector Tests Open
The purpose of this study was to evaluate several of the standardized image quality metrics proposed by the American Association of Physics in Medicine (AAPM) Task Group 150. The task group suggested region‐of‐interest (ROI)‐based techniqu…
View article: Genome Sequences of <i>Gordonia</i> Bacteriophages Obliviate, UmaThurman, and Guacamole
Genome Sequences of <i>Gordonia</i> Bacteriophages Obliviate, UmaThurman, and Guacamole Open
We describe three newly isolated phages—Obliviate, UmaThurman, and Guacamole—that infect Gordonia terrae 3612. The three genomes are related to one another but are not closely related to other previously sequenced phages or prophages. The …