Abstract：
:The use of dedicated magnetic resonance simulation (MR-SIM) platforms in Radiation Oncology has expanded rapidly, introducing new equipment and functionality with the overall goal of improving the accuracy of radiation treatment planning. However, this emerging technology presents a new set of challenges that need to be addressed for safe and effective MR-SIM implementation. The major objectives of this report are to provide recommendations for commercially available MR simulators, including initial equipment selection, siting, acceptance testing, quality assurance, optimization of dedicated radiation therapy specific MR-SIM workflows, patient-specific considerations, safety, and staffing. Major contributions include guidance on motion and distortion management as well as MRI coil configurations to accommodate patients immobilized in the treatment position. Examples of optimized protocols and checklists for QA programs are provided. While the recommendations provided here are minimum requirements, emerging areas and unmet needs are also highlighted for future development.
journal_name
Med Physjournal_title
Medical physicsauthors
Glide-Hurst CK,Paulson ES,McGee K,Tyagi N,Hu Y,Balter J,Bayouth Jdoi
10.1002/mp.14695subject
Has Abstractpub_date
2021-01-01 00:00:00eissn
0094-2405issn
2473-4209pub_type
杂志文章相关文献
MEDICAL PHYSICS文献大全abstract：:We have developed an analytic solution for spatially resolved diffuse reflectance within the deltaP1 approximation to the radiative transport equation for a semi-infinite homogeneous turbid medium. We evaluate the performance of this solution by comparing its predictions with those provided by Monte Carlo simulations ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.2828184
更新日期：2008-02-01 00:00:00
abstract：:Electron spectral reconstruction of medical accelerators from measured depth doses is a practical method for providing the input initial phase space distribution at the patient surface that is required by Monte Carlo treatment planning systems. The posed inverse problem of spectral reconstruction is ill conditioned an...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.2161404
更新日期：2006-02-01 00:00:00
abstract：PURPOSE:Obtaining an integral depth-dose (IDD) curve using a recently developed acrylic-disk radiation sensor (ADRS) is time-consuming because its single structure requires point-by-point measurements in a water phantom. The goal of this study was to verify the ability of a newly designed multilayer ADRS, composed of 2...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.14326
更新日期：2020-09-01 00:00:00
abstract：PURPOSE:To propose a method to calculate the tissue phantom ratio (TPR) using the depth dose and to compare the proposed method with two other methods. METHODS:An analytical dose model from Bjärngard was used to describe the depth dose and the TPR. The parameters of the model were derived from depth dose measurements,...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3570575
更新日期：2011-05-01 00:00:00
abstract：PURPOSE:Computed tomography (CT) intrascanner and interscanner variability has not been well characterized. Thus, the purpose of this study was to examine the within-run, between-run, and between-scanner precision of physical dosimetry-related measurements collected over the course of 1 yr on three different makes and ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3426000
更新日期：2010-08-01 00:00:00
abstract：PURPOSE:The GammaPod is a novel dedicated prone breast stereotactic radiosurgery (SRS) device recently developed at the University of Maryland Medical Center. This device utilizes multiple rotating Co-60 sources to create highly conformal dose distributions for breast treatments, including boosts, partial breast irradi...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.14197
更新日期：2020-08-01 00:00:00
abstract：:A prototype Emission-Transmission Computed Tomography (ETCT) system is being developed that will acquire single-slice x-ray transmission CT images simultaneously with single photon emission computed tomography (SPECT) images. This system will permit the correlation of anatomical information from x-ray CT with function...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.596643
更新日期：1991-09-01 00:00:00
abstract：PURPOSE:Air-communicating well ionization chambers are commonly used to assess air kerma strength of sources used in brachytherapy. The signal produced is supposed to be proportional to the air density within the chamber and, therefore, a density-independent air kerma strength is obtained when the measurement is correc...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4831757
更新日期：2013-12-01 00:00:00
abstract：PURPOSE:To correlate the Cole relaxation frequencies obtained from measurements of the electrical properties of breast tissue to the presence or absence of cancer. METHODS:Four-lead impedance measurements were obtained on ex vivo specimens extracted during surgery from 187 volunteer patients. Data were acquired with a...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4725172
更新日期：2012-07-01 00:00:00
abstract：PURPOSE:An original radionuclide calibrator method for activity determination is presented. The method could be used for intercomparison surveys for short half-life radioactive sources used in Nuclear Medicine, such as(99m)Tc or most positron emission tomography radiopharmaceuticals. METHODS:By evaluation of the resul...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4884035
更新日期：2014-07-01 00:00:00
abstract：:Computer algorithms for rotational therapy beams, in most cases, perform dose calculations by summing stored fixed beam data at finite angular steps. Such an algorithm, based on the Bentley beam model, was evaluated by comparing calculations with measured data for an 18-MV x-ray beam. Measurements were made in a speci...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.595985
更新日期：1987-11-01 00:00:00
abstract：:Amorphous selenium (a-Se) based real-time flat-panel imagers (FPIs) are finding their way into the digital radiology department because they offer the practical advantages of digital x-ray imaging combined with an image quality that equals or outperforms that of conventional systems. The temporal imaging characteristi...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.2042248
更新日期：2005-10-01 00:00:00
abstract：PURPOSE:The purpose of this work is twofold: First, to characterize the artifacts occurring in helical 4D-CT imaging; second, to propose a method that can automatically identify the artifacts in 4D-CT images. The authors have designed a process that can automatically identify the artifacts in 4D-CT images, which may be...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3553556
更新日期：2011-04-01 00:00:00
abstract：PURPOSE:The recent development of multifocal stereotactic radiosurgery (SRS) using a single isocenter volumetric modulated arc theory (VMAT) technique warrants a re-examination of the quality assurance (QA) tolerances for routine mechanical QA recommended by the American Association of Physicists in Medicine Task Group...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4962471
更新日期：2016-10-01 00:00:00
abstract：:A new beam line for radiotherapy and radiosurgery with accelerated helium-ion beams has been set up at the Bevalac. The new treatment room has been equipped with a very precise patient positioner in order to utilize the superior dose localization properties of light-ion beams. The beam spreading and shaping system is ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.596696
更新日期：1991-01-01 00:00:00
abstract：:Variations in the atomic composition, and mass and electron densities of polystyrene and polymethylmethacrylate (PMM) plastics were assessed from experimentally determined mass attenuation coefficients for 125I and 137Cs gamma rays. The means and standard deviations in the mass densities of 16 samples of PMM and 10 sa...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.594528
更新日期：1979-03-01 00:00:00
abstract：:The dose received in the buildup region outside the primary beam has been measured for 60Co gamma rays and 6- and 18-MV X rays. The variation of this dose with field size and depth was evaluated. The effect of blocking trays and the importance of their design was determined. ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.595508
更新日期：1984-05-01 00:00:00
abstract：PURPOSE:Accurately predicting outcome (i.e., overall survival (OS) time) for higher grade glioma (HGG) has great clinical value and would provide optimized guidelines for treatment planning. Radiomics focuses on revealing underlying pathophysiological information in biomedical images for disease analysis and demonstrat...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.13288
更新日期：2019-01-01 00:00:00
abstract：PURPOSE:Accurate calculation of proton stopping power ratio (SPR) relative to water is crucial to proton therapy treatment planning, since SPR affects prediction of beam range. Current standard practice derives SPR using a single CT scan. Recent studies showed that dual-energy CT (DECT) offers advantages to accurately ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.12796
更新日期：2018-04-01 00:00:00
abstract：PURPOSE:It is estimated that 7% of women in the western world will develop palpable breast cysts in their lifetime. Even though cysts have been correlated with risk of developing breast cancer, many of them are benign and do not require follow-up. We develop a method to discriminate benign solitary cysts from malignant...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.12110
更新日期：2017-03-01 00:00:00
abstract：PURPOSE:In this study, the authors validated a novel respiratory tracking device, the multidimensional respiratory tracking (MDRT) system, that was designed to assist in correcting for respiratory motion in PET/CT images. The authors also investigated a novel PET acquisition technique, smart gating (SG), that enables t...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3523100
更新日期：2011-01-01 00:00:00
abstract：:Scanning film densitometry routinely used for obtaining dosimetric information about therapy treatment beams is subject to several sources of inaccuracies. The most significant of these are described and appropriate methods of testing are presented. This establishes the need for adequate acceptance testing followed by...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.595407
更新日期：1983-09-01 00:00:00
abstract：PURPOSE:The local depth dose gradient and the displacement correction factor for Farmer-type ionization chambers are quantified for reference dosimetry at shallow depth in single-layer scanned proton fields. METHOD:Integrated radial profiles as a function of depth (IRPDs) measured at three proton therapy centers were ...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.14554
更新日期：2020-12-01 00:00:00
abstract：PURPOSE:The spatial resolution of iterative reconstruction (IR) in computed tomography (CT) is contrast- and noise-dependent because of the nonlinear regularization. Due to the severe noise contamination, it is challenging to perform precise spatial-resolution measurements at very low-contrast levels. The purpose of th...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4916802
更新日期：2015-05-01 00:00:00
abstract：PURPOSE:To evaluate the image quality of virtual monochromatic images synthesized from dual-source dual-energy computed tomography (CT) in comparison with conventional polychromatic single-energy CT for the same radiation dose. METHODS:In dual-energy CT, besides the material-specific information, one may also synthesi...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3658568
更新日期：2011-12-01 00:00:00
abstract：:Radiographic magnification is often employed in mammography to improve detection of small anatomical details of clinical interest, such as microcalcifications. The image size depends on the conventional magnification factor, on the focal spot size, and on the x-ray angulation. In this paper magnification effects are i...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.597288
更新日期：1994-02-01 00:00:00
abstract：:AAPM Magnetic Resonance Task Group #9 on proton magnetic resonance spectroscopy (MRS) in the brain was formed to provide a reference document for acquiring and processing proton (1H) MRS acquired from brain tissue. MRS is becoming a common adjunct to magnetic resonance imaging (MRI), especially for the differential di...
journal_title：Medical physics
pub_type： 指南,杂志文章,实务指引,评审
doi：10.1118/1.1501822
更新日期：2002-09-01 00:00:00
abstract：PURPOSE:At our institution, all proton patient plans undergo patient-specific quality assurance (PSQA) prior to treatment delivery. For intensity-modulated proton beam therapy, quality assurance is complex and time consuming, and it may involve multiple measurements per field. We reviewed our PSQA workflow and identifi...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1002/mp.13246
更新日期：2019-01-01 00:00:00
abstract：PURPOSE:Motion is a major confound of image quality in MRI. A method of retrospectively correcting the effects of rotations and translations on the acquired k-space data is presented. METHODS:In two phantom experiments of well-controlled translation and rotation, two MRI-compatible infrared cameras recorded motion dat...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.3254189
更新日期：2009-12-01 00:00:00
abstract：PURPOSE:To investigate the use of local noise power spectrum (NPS) to characterize image noise and wavelet analysis to isolate defective pixels and inter-subpanel flat-fielding artifacts for quantitative quality assurance (QA) of electronic portal imaging devices (EPIDs). METHODS:A total of 93 image sets including cus...
journal_title：Medical physics
pub_type： 杂志文章
doi：10.1118/1.4959541
更新日期：2016-09-01 00:00:00
