Abstract:
:Extensive information has been made available relative to the physical aspects necessary for calculation of radiation absorbed dose from radiopharmaceuticals. A similar data base for the biological factors involved in these calculations has not been documented as thoroughly. The authors present an extensive literature review for the radiation absorbed dose of 131I-ortho-iodohippurate and discuss the rationale for adjusting previously accepted values with new biodistribution information.
journal_name
Med Physjournal_title
Medical physicsauthors
Flannery A,Veber J,Greenfield MA,McIntyre AB,Hamilton DRdoi
10.1118/1.594679subject
Has Abstractpub_date
1980-05-01 00:00:00pages
249-50issue
3eissn
0094-2405issn
2473-4209journal_volume
7pub_type
杂志文章相关文献
MEDICAL PHYSICS文献大全abstract::The relationship between the pixel value and exit dose was investigated for a new commercially available amorphous silicon electronic portal imaging device. The pixel to dose mapping function was established to be linear for detector distances between 116.5 cm to 150 cm from the source, radiation field sizes from 5 x ...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.1508108
更新日期:2002-10-01 00:00:00
abstract:PURPOSE:Color images are visualized on medical monitors that are adjusted by a grayscale standard display function (GSDF) or γ2.2. Although the GSDF is visually displayed as a linear graded grayscale, it does not specify how color medical images should be presented. On the other hand, the usual gamma setting for color ...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.13532
更新日期:2019-06-01 00:00:00
abstract:PURPOSE:Developed herein is a three-dimensional (3D) flow contrast imaging system leveraging advancements in the extension of laser speckle contrast imaging theories to deep tissues along with our recently developed finite-element diffuse correlation tomography (DCT) reconstruction scheme. This technique, termed speckl...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4922206
更新日期:2015-07-01 00:00:00
abstract::A Monte Carlo study of dosimetry for eye plaque brachytherapy is performed. BrachyDose, an EGSnrc user code which makes use of Yegin's multi-geometry package, is used to fully model I125 (model 6711) and Pd103 (model 200) brachytherapy seeds and the standardized plaques of the Collaborative Ocular Melanoma Study (COMS...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.3002412
更新日期:2008-12-01 00:00:00
abstract:PURPOSE:The aim of this study was to use MRI gel dosimetry to determine the dose profile of 50kV MAGNUM® X-ray tube, MOXTEK Inc., in order to calibrate small solid dosimeters of alanine, tooth enamel and LiF-TLDs, commonly used in clinical quality assurance and datation dosimetry. METHODS:MAGIC-f polymer gel was kept ...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4735203
更新日期:2012-06-01 00:00:00
abstract:PURPOSE:As hypoxic cells are more resistant to photon radiation, it is desirable to obtain information about the oxygen distribution in tumors prior to the radiation treatment. Noninvasive techniques are currently not able to provide reliable oxygenation maps with sufficient spatial resolution; therefore mathematical m...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4812431
更新日期:2013-08-01 00:00:00
abstract::Multi-instrument activity estimation and decay correction techniques were developed for radionuclide mixtures, motivated by the desire for accurate quantitation of Tc-94m positron emission tomography (PET) studies. Tc-94m and byproduct Tc isotopes were produced by proton irradiation of enriched Mo-94 and natural Mo ta...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.1333411
更新日期:2001-01-01 00:00:00
abstract::Three Monte Carlo photon/electron transport codes (GEPTS, EGSnrc, and MCNP) are bench-marked against dose measurements in homogeneous (both low- and high-Z) media as well as at interfaces. A brief overview on physical models used by each code for photon and electron (positron) transport is given. Absolute calorimetric...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.1473134
更新日期:2002-05-01 00:00:00
abstract:PURPOSE:On-board MRI can provide superb soft tissue contrast for improving liver SBRT localization. However, the availability of on-board MRI in clinics is extremely limited. On the contrary, on-board kV imaging systems are widely available on radiotherapy machines, but its capability to localize tumors in soft tissue ...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.12998
更新日期:2018-07-01 00:00:00
abstract:PURPOSE:The use of X-ray imaging in radiation therapy can give a substantial dose to the patient. A Cobalt machine combined with an magnetic resonance imaging (MRI) was recently introduced to clinical work. One positive aspect of using non-ionizing imaging devices is the reduction of the patient exposure. The purpose o...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.12293
更新日期:2017-07-01 00:00:00
abstract:PURPOSE:To develop a new design of an x-ray beam shaper for helical computed tomography (CT) that increases the dose utilization. METHODS:For typical reconstruction algorithms in helical CT, different data are utilized with different weights during back-projection. In particular, data of the outer detector rows, i.e.,...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.3577766
更新日期:2011-07-01 00:00:00
abstract:PURPOSE:To evaluate plan quality of a novel MRI-compatible direction modulated brachytherapy (DMBT) tandem applicator using 192 Ir, 60 Co, and 169 Yb HDR brachytherapy sources, for various cervical cancer high-risk clinical target volumes (CTVHR ). MATERIALS AND METHODS:The novel DMBT tandem applicator has six periphe...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.12598
更新日期:2017-12-01 00:00:00
abstract:PURPOSE:Dedicated breast PET/CT is expected to have utility in local staging, surgical planning, monitoring of therapy response, and detection of residual disease for breast cancer. Quantitative metrics will be integral to several such applications. The authors present a validation of fully 3D data correction schemes f...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.3703593
更新日期:2012-05-01 00:00:00
abstract:PURPOSE:Accurate segmentation of lung and infection in COVID-19 computed tomography (CT) scans plays an important role in the quantitative management of patients. Most of the existing studies are based on large and private annotated datasets that are impractical to obtain from a single institution, especially when radi...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.14676
更新日期:2020-12-23 00:00:00
abstract:PURPOSE:The goal of this work is to propose a new multichannel method correcting for systematic thickness disturbances and to evaluate its precision in relevant radiation dosimetry applications. METHODS:The eigencolor ratio technique is introduced and theoretically developed to provide a method correcting for thicknes...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.14742
更新日期:2021-02-01 00:00:00
abstract:PURPOSE:To evaluate the availability and performance of pencil beam algorithm for fast neutrons radiotherapy dose calculations and to achieve improvements in universality, speed and inhomogeneities corrections. METHODS:Pencil beam (PB) method uses integration of dose kernel cross field size to estimate dose distributi...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4735630
更新日期:2012-06-01 00:00:00
abstract::Double checking of the monitor units (MU) is an important step in the quality assurance (QA) process in radiosurgery. In this paper we propose the use of an independent algorithm constructed using the ellipsoid which best fits the measurements taken with the bubble head frame. The monitor units calculated by this inde...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.2815361
更新日期:2008-01-01 00:00:00
abstract::Assessment of clinic and site specific margins are essential for the effective use of three-dimensional and intensity modulated radiation therapy. An electronic portal imaging device (EPID) based methodology is introduced which allows individual and population based CTV-to-PTV margins to be determined and compared wit...
journal_title:Medical physics
pub_type: 临床试验,杂志文章
doi:10.1118/1.1800712
更新日期:2004-11-01 00:00:00
abstract:PURPOSE:The authors' objective was to compare internal dose estimates obtained using the Organ Level Dose Assessment with Exponential Modeling (OLINDA/EXM) software, the voxel S value technique, and Monte Carlo simulation. Monte Carlo dose estimates were used as the reference standard to assess the impact of patient-sp...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4892606
更新日期:2014-09-01 00:00:00
abstract::Measurements of a 670-MeV/amu 20Ne beam at the Lawrence Berkeley Laboratory Bevalac heavy-ion accelerator with various thicknesses of water absorber were obtained with the BERKLET. The BERKLET, a simple three-stage solid-state telescope detector, has been described previously. This instrument measures the linear energ...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.596536
更新日期:1990-03-01 00:00:00
abstract::Current dosimetry protocols for clinical protons do not take into account any secondary electron fluence perturbation in ion chambers. In this work, we performed a systematic study of secondary electron fluence perturbation factors for spherical and cylindrical ion chambers in proton beams (70-250 MeV). The electron f...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.1406519
更新日期:2001-10-01 00:00:00
abstract::Intensity modulated radiation therapy (IMRT) treatment planning typically considers beam optimization and beam delivery as separate tasks. Following optimization, a multi-leaf collimator (MLC) or other beam delivery device is used to generate fluence patterns for patient treatment delivery. Due to limitations and char...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.1477230
更新日期:2002-06-01 00:00:00
abstract::A proton dose computational algorithm, performing an analytical superposition of infinitely narrow proton beamlets (ASPB) is introduced. The algorithm uses the standard pencil beam technique of laterally distributing the central axis broad beam doses according to the Moliere scattering theory extended to slablike vary...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.2064887
更新日期:2005-12-01 00:00:00
abstract:PURPOSE:To automatically detect and isolate areas of low and high stiffness temporal stability in shear wave elastography (SWE) image sequences and define their impact in chronic liver disease (CLD) diagnosis improvement by means of clinical examination study and deep learning algorithm employing convolutional neural n...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.13521
更新日期:2019-05-01 00:00:00
abstract:PURPOSE:Multiple commercial, open-source, and academic software tools exist for objective quantification of lung density in computed tomography (CT) images. The purpose of this study was to evaluate the intersoftware reproducibility of CT lung density measurements. METHODS:Computed tomography images from 50 participan...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1002/mp.14130
更新日期:2020-07-01 00:00:00
abstract::We are developing a computer program for automated detection of clustered microcalcifications on mammograms. In this study, we investigated the effectiveness of a signal classifier based on a convolution neural network (CNN) approach for improvement of the accuracy of the detection program. Fifty-two mammograms with c...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.597428
更新日期:1995-10-01 00:00:00
abstract::Human tumors are characterized by an abnormal vascular network that develops because of unregulated angiogenesis. This contributes to abnormalities of the tumor microenvironment like hypoxia, acidosis and high interstitial fluid pressure that influence treatment response and patient survival. There is an important cli...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4736156
更新日期:2012-06-01 00:00:00
abstract::In patients with lymphoma, identification and quantification of the tumor extent on serial CT examinations is critical for assessing tumor response to therapy. In this paper, we present a computer method to automatically match and segment lymphomas in follow-up CT images. The method requires that target lymph nodes in...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.2404617
更新日期:2007-01-01 00:00:00
abstract:PURPOSE:Discuss optimised Accelerated Partial Breast Irradiation (APBI) using a Strut-Adjused Volume Implant (SAVI) applicator for patients with implanted pacemeker, without overdosing or relocating the pacemaker. METHODS:A right breast cancer patient with an in situ pacemaker (Medtronic model ADDR01) on the right sid...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.4735299
更新日期:2012-06-01 00:00:00
abstract::We have performed a comprehensive dosimetric characterization of the Oncura model 6711 125I seed using both experimental [LiF thermoluminscent dosimetry (TLD)] and theoretical (Monte Carlo photon transport) methods. In addition to determining the dosimetric parameters of the 6711, this report quantified: (1) the angul...
journal_title:Medical physics
pub_type: 杂志文章
doi:10.1118/1.2388158
更新日期:2006-12-01 00:00:00