当前位置： SCI文献检索 > PHYSICS IN MEDICINE AND BIOLOGY期刊下所有文献 > Are phantoms useful for predicting the potential of dose reduction in full-field digital mammography?

Are phantoms useful for predicting the potential of dose reduction in full-field digital mammography?

Abstract：

:A phantom study was performed in full-field digital mammography to investigate the opportunity and the magnitude of a possible dose reduction that would leave the image quality above the accepted thresholds associated with some classical phantoms. This preliminary work is intended to lay the groundwork for a future clinical study on the impact of dose reduction on clinical results. Three different mammography phantoms (ACR RMI 156, CIRS 11A and CDMAM 3.4) were imaged by a full-field digital mammography unit (GE Senographe 2000D) at different dose levels. Images were rated by three observers with softcopy reading and scoring methods specific to each phantom. Different types of data analysis were applied to the ACR (American College of Radiology) and the other two phantoms, respectively. With reference to the minimum acceptance score in screen/film accreditation programmes, the ACR phantom showed that about 45% dose reduction could be applied, while keeping the phantom scores above that threshold. A relative comparison was done for CIRS and CDMAM, for which no threshold is defined. CIRS scoring remained close to the reference level down to 40% dose reduction, the inter- and intra-observer variability being the main source of uncertainty. Contrast-detail curves provided by CDMAM overlapped down to 50% dose reduction, at least for object contrast values ranging between 30% and 3%. This multi-phantom study shows the potential of further reducing the dose in full-field digital mammography beyond the current values. A common dose reduction factor around 50% seems acceptable for all phantoms. However, caution is required before extrapolating the results for clinical use, given the limitations of these widely used phantoms, mainly related to their limited dynamic range and uniform background.

journal_name

Phys Med Biol

journal_title

Physics in medicine and biology

authors

Gennaro G,Katz L,Souchay H,Alberelli C,di Maggio C

doi

10.1088/0031-9155/50/8/015

subject

Has Abstract

pub_date

2005-04-21 00:00:00

pages

1851-70

issue

8

eissn

0031-9155

issn

1361-6560

pii

S0031-9155(05)90285-6

journal_volume

50

pub_type

杂志文章

相关文献

PHYSICS IN MEDICINE AND BIOLOGY文献大全
  • Fuzzy clustering-based segmented attenuation correction in whole-body PET imaging.

    abstract：:Segmented attenuation correction is now a widely accepted technique to reduce noise propagation from transmission scanning in positron emission tomography (PET). In this paper, we present a new method for segmenting transmission images in whole-body scanning. This reduces the noise in the correction maps while still c...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/47/7/310

    authors： Zaidi H,Diaz-Gomez M,Boudraa A,Slosman DO

    更新日期：2002-04-07 00:00:00

  • Physical characterization and performance comparison of active- and passive-pixel CMOS detectors for mammography.

    abstract：:We investigated the physical characteristics of two complementary metal oxide semiconductor (CMOS) mammography detectors. The detectors featured 14-bit image acquisition, 50 microm detector element (del) size and an active area of 5 cm x 5 cm. One detector was a passive-pixel sensor (PPS) with signal amplification per...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/54/6/022

    authors： Elbakri IA,McIntosh BJ,Rickey DW

    更新日期：2009-03-21 00:00:00

  • The importance of radiometer angular response for ultraviolet phototherapy dosimetry.

    abstract：:The influence of the angular response of radiometer probes on measurements of irradiance in ultraviolet phototherapy has been studied. Irradiance measurements were made using nine ultraviolet (UV) radiometers employed by phototherapy centres in Scotland and Northern Ireland, and compared with measurements made using t...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/44/4/003

    authors： Martin CJ,Currie GD,Pye SD

    更新日期：1999-04-01 00:00:00

  • Directional x-ray dark-field imaging.

    abstract：:We introduce a novel x-ray imaging approach that yields information about the local texture of structures smaller than the image pixel resolution inside an object. The approach is based on a recently developed x-ray dark-field imaging technique, using scattering from sub-micron structures in the sample. We show that t...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/55/12/004

    authors： Jensen TH,Bech M,Bunk O,Donath T,David C,Feidenhans'l R,Pfeiffer F

    更新日期：2010-06-21 00:00:00

  • Optimisation of the imaging and dosimetric characteristics of an electronic portal imaging device employing plastic scintillating fibres using Monte Carlo simulations.

    abstract：:A Monte Carlo model of a novel electronic portal imaging device (EPID) has been developed using Geant4 and its performance for imaging and dosimetry applications in radiotherapy has been characterised. The EPID geometry is based on a physical prototype under ongoing investigation and comprises an array of plastic scin...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/59/22/6827

    authors： Blake SJ,McNamara AL,Vial P,Holloway L,Kuncic Z

    更新日期：2014-11-21 00:00:00

  • The dose--response relation for rat spinal cord paralysis analyzed in terms of the effective size of the functional subunit.

    abstract：:Radiobiological models for estimating normal tissue complication probability (NTCP) are increasingly used in order to quantify or optimize the clinical outcome of radiation therapy. A good NTCP model should fulfill at least the following two requirements: (a) it should predict the sigmoid shape of the corresponding do...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/53/22/016

    authors： Adamus-Górka M,Mavroidis P,Brahme A,Lind BK

    更新日期：2008-11-21 00:00:00

  • Optimization of magnetic flux density measurement using multiple RF receiver coils and multi-echo in MREIT.

    abstract：:Magnetic Resonance Electrical Impedance Tomography (MREIT) is an MRI method that enables mapping of internal conductivity and/or current density via measurements of magnetic flux density signals. The MREIT measures only the z-component of the induced magnetic flux density B = (Bx, By, Bz) by external current injection...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/59/17/4827

    authors： Jeong WC,Chauhan M,Sajib SZ,Kim HJ,Serša I,Kwon OI,Woo EJ

    更新日期：2014-09-07 00:00:00

  • Error propagation in quantitative biplane cineroentgenography.

    abstract：:The propagation of errors in quantitative biplane cineroentgenography was investigated to see which variables were the most critical. The analysis was carried out both for the propagation of root-mean-square errors and for errors as derived by a Taylor expansion of the reconstruction equations. The reconstruction is m...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/23/4/009

    authors： Smith WM,Starmer CF

    更新日期：1978-07-01 00:00:00

  • The utilization of consistency metrics for error analysis in deformable image registration.

    abstract：:The aim of this study was to investigate the utility of consistency metrics, such as inverse consistency, in contour-based deformable registration error analysis. Four images were acquired of the same phantom that has experienced varying levels of deformation. The deformations were simulated with deformable image regi...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/54/18/014

    authors： Bender ET,Tomé WA

    更新日期：2009-09-21 00:00:00

  • Comparison between the lateral penumbra of a collimated double-scattered beam and uncollimated scanning beam in proton radiotherapy.

    abstract：:Intensity modulated proton radiotherapy (IMPT) can reduce the dose to critical structures by optimizing the distribution and intensity of individual pencil beams. The IMPT can be delivered by dynamically scanning a pencil beam with variable intensity and energy across the tumor target volume. The lateral penumbra of a...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/53/6/016

    authors： Safai S,Bortfeld T,Engelsman M

    更新日期：2008-03-21 00:00:00

  • Specific absorbed fractions for a revised series of the UF/NCI pediatric reference phantoms: internal photon sources.

    abstract：:Assessment of radiation absorbed dose to internal organs of the body from the intake of radionuclides or, in the medical setting through the injection of radiopharmaceuticals, is generally performed based upon reference biokinetic models or patient imaging data, respectively. Biokinetic models estimate the time course...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/1361-6560/abc708

    authors： Schwarz BC,Godwin WJ,Wayson MB,Dewji SA,Jokisch DW,Lee C,Bolch WE

    更新日期：2020-11-03 00:00:00

  • Accuracy of Monte Carlo photon transport simulation in characterizing brachytherapy dosimeter energy-response artefacts.

    abstract：:Practical dosimeters in brachytherapy, such as thermoluminescent dosimeters (TLD) and diodes, are usually calibrated against low-energy megavoltage beams. To measure absolute dose rate near a brachytherapy source, it is necessary to establish the energy response of the detector relative to that of the calibration ener...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/41/6/004

    authors： Das RK,Li Z,Perera H,Williamson JF

    更新日期：1996-06-01 00:00:00

  • Medical applications of synchrotron radiation.

    abstract：:The medical imaging and therapeutic technologies that are based on the use of radiation are reviewed briefly, with special emphasis on the recent developments of synchrotron radiation (SR) methods. New results have been achieved in all of these areas since the last comprehensive reviews were written in this field. Thi...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章,评审

    doi：10.1088/0031-9155/48/13/201

    authors： Suortti P,Thomlinson W

    更新日期：2003-07-07 00:00:00

  • Optical artefact characterization and correction in volumetric scintillation dosimetry.

    abstract：:The goals of this study were (1) to characterize the optical artefacts affecting measurement accuracy in a volumetric liquid scintillator detector, and (2) to develop methods to correct for these artefacts. The optical artefacts addressed were photon scattering, refraction, camera perspective, vignetting, lens distort...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/59/1/23

    authors： Robertson D,Hui C,Archambault L,Mohan R,Beddar S

    更新日期：2014-01-06 00:00:00

  • PBS machine interlocks using EWMA.

    abstract：:Delivery of pencil beam scanning (PBS) requires the on-line measurement of several beam parameters. If the measurement is outside of specified tolerances and a binary threshold algorithm is used, the beam will be paused. Given instrumentation and statistical noise such a system can lead to many pauses which could incr...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/61/1/400

    authors： Clasie BM,Kooy HM,Flanz JB

    更新日期：2016-01-07 00:00:00

  • Multi-layer imager design for mega-voltage spectral imaging.

    abstract：:The architecture of multi-layer imagers (MLIs) can be exploited to provide megavoltage spectral imaging (MVSPI) for specific imaging tasks. In the current work, we investigated bone suppression and gold fiducial contrast enhancement as two clinical tasks which could be improved with spectral imaging. A method based on...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/1361-6560/aabe21

    authors： Myronakis M,Hu YH,Fueglistaller R,Wang A,Baturin P,Huber P,Morf D,Star-Lack J,Berbeco R

    更新日期：2018-05-10 00:00:00

  • Evaluation of factors to convert absorbed dose calibrations from graphite to water for the NPL high-energy photon calibration service.

    abstract：:The National Physical Laboratory (NPL) provides a high-energy photon calibration service using 4-19 MV x-rays and 60Co gamma-radiation for secondary standard dosemeters in terms of absorbed dose to water. The primary standard used for this service is a graphite calorimeter and so absorbed dose calibrations must be con...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/47/3/306

    authors： Nutbrown RF,Duane S,Shipley DR,Thomas RA

    更新日期：2002-02-07 00:00:00

  • End-to-end tests using alanine dosimetry in scanned proton beams.

    abstract：:This paper describes end-to-end test procedures as the last fundamental step of medical commissioning before starting clinical operation of the MedAustron synchrotron-based pencil beam scanning (PBS) therapy facility with protons. One in-house homogeneous phantom and two anthropomorphic heterogeneous (head and pelvis)...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/1361-6560/aaac23

    authors： Carlino A,Gouldstone C,Kragl G,Traneus E,Marrale M,Vatnitsky S,Stock M,Palmans H

    更新日期：2018-02-26 00:00:00

  • A Monte Carlo investigation of contaminant electrons due to a novel in vivo transmission detector.

    abstract：:A novel transmission detector (IBA Dosimetry, Germany) developed as an IMRT quality assurance tool, intended for in vivo patient dose measurements, is studied here. The goal of this investigation is to use Monte Carlo techniques to characterize treatment beam parameters in the presence of the detector and to compare t...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/56/4/020

    authors： Asuni G,Jensen JM,McCurdy BM

    更新日期：2011-02-21 00:00:00

  • A mathematical model of the biologically effective dose of solar UVA received by patients undergoing oral psoralen photochemotherapy for psoriasis.

    abstract：:A theoretical analysis is presented of the biologically effective dose of the solar long wave ultraviolet radiation (UVA) received by patients who are being treated for psoriasis by oral psoralen photochemotherapy. It is shown that patients treated during the summer months in the UK may well receive a UV dose which is...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/26/6/011

    authors： Diffey BL

    更新日期：1981-11-01 00:00:00

  • Monte Carlo dosimetric study of the BEBIG Co-60 HDR source.

    abstract：:Although not as widespread as Ir-192, Co-60 is also available on afterloading equipment devoted to high dose rate brachytherapy, mainly addressed to the treatment of gynaecological lesions. The purpose of this study is to obtain the dosimetric parameters of the Co-60 source used by the BEBIG MultiSource remote afterlo...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/50/21/N03

    authors： Ballester F,Granero D,Pérez-Calatayud J,Casal E,Agramunt S,Cases R

    更新日期：2005-11-07 00:00:00

  • A comprehensive study of the use of temporal moments in time-resolved diffuse optical tomography: part I. Theoretical material.

    abstract：:The problem of fluorescence diffuse optical tomography consists in localizing fluorescent markers from near-infrared light measurements. Among the different available acquisition modalities, the time-resolved modality is expected to provide measurements of richer information content. To extract this information, the m...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/54/23/004

    authors： Ducros N,Hervé L,Da Silva A,Dinten JM,Peyrin F

    更新日期：2009-12-07 00:00:00

  • Beam angle selection incorporation of anatomical heterogeneities for pencil beam scanning charged-particle therapy.

    abstract：:In charged particle therapy with pencil beam scanning (PBS), localization of the dose in the Bragg peak makes dose distributions sensitive to lateral tissue heterogeneities. The sensitivity of a PBS plan to lateral tissue heterogeneities can be reduced by selecting appropriate beam angles. The purpose of this study is...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/1361-6560/61/24/8664

    authors： Toramatsu C,Inaniwa T

    更新日期：2016-12-21 00:00:00

  • Study of the PTW microLion chamber temperature dependence.

    abstract：:The use of liquid ionization chambers in radiotherapy has grown during the past few years. While for air ionization chambers the k(TP) correction for air mass density due to pressure and temperature variations is well known, less work has been done on the case of liquid ionization chambers, where there is still the ne...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/59/11/2705

    authors： Gómez F,González-Castaño D,Díaz-Botana P,Pardo-Montero J

    更新日期：2014-06-07 00:00:00

  • Image quality improvements of electronic portal imaging devices by multi-level gain calibration and temperature correction.

    abstract：:Amorphous silicon (aSi:H) flat panel detectors are prevalent in radiotherapy for megavoltage imaging tasks. Any clinical and dosimetrical application requires a well-defined dose response of the system to achieve meaningful results. Due to radiation damages, panels deteriorate and the linearity of pixel response to do...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/58/18/6429

    authors： Huber S,Mooslechner M,Mitterlechner B,Weichenberger H,Serpa M,Sedlmayer F,Deutschmann H

    更新日期：2013-09-21 00:00:00

  • Optimisation of field flatness and depth-dose for therapy electron beams.

    abstract：:Curves relating beam energy, scattering foil thickness, central-axis depth-dose, and beam flatness have been generated using data taken on a Siemens 200A betatron. The curve set allows a single combination of tungsten foil thickness and electron beam energy to be chosen that will provide the optimum depth-dose distrib...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/26/3/007

    authors： Marbach JR,Almond PR

    更新日期：1981-05-01 00:00:00

  • Noise reduction and convergence of Bayesian algorithms with blobs based on the Huber function and median root prior.

    abstract：:Iterative image reconstruction algorithms have the potential to produce low noise images. Early stopping of the iteration process is problematic because some features of the image may converge slowly. On the other hand, there may be noise build-up with increased number of iterations. Therefore, we examined the stabili...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/49/20/004

    authors： Chlewicki W,Hermansen F,Hansen SB

    更新日期：2004-10-21 00:00:00

  • Computed temperature distributions around ectatic capillaries exposed to yellow (578 nm) laser light.

    abstract：:We have numerically modelled the thermal effects of yellow (577 or 578 nm) light illumination on the ectatic blood vessels of port wine stains. We investigated the effect of the laser treatment parameters of light irradiance and illumination time on the extent of coagulation (coagulation thickness) of the endothelial ...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/34/9/010

    authors： Pickering JW,Butler PH,Ring BJ,Walker EP

    更新日期：1989-09-01 00:00:00

  • Scanned proton radiotherapy for mobile targets-the effectiveness of re-scanning in the context of different treatment planning approaches and for different motion characteristics.

    abstract：:The most advanced delivery technique for proton radiotherapy is active spot scanning. So far, predominantly static targets have been treated with active spot scanning, since mobile targets in combination with dynamic treatment delivery can lead to interplay effects, causing inhomogeneous dose distributions. One way to...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/56/22/016

    authors： Knopf AC,Hong TS,Lomax A

    更新日期：2011-11-21 00:00:00

  • In vivo dosimetry in the urethra using alanine/ESR during (192)Ir HDR brachytherapy of prostate cancer--a phantom study.

    abstract：:A phantom study for dosimetry in the urethra using alanine/ESR during (192)Ir HDR brachytherapy of prostate cancer is presented. The measurement method of the secondary standard of the Physikalisch-Technische Bundesanstalt had to be slightly modified in order to be able to measure inside a Foley catheter. The absorbed...

    journal_title：Physics in medicine and biology

    pub_type： 杂志文章

    doi：10.1088/0031-9155/54/9/022

    authors： Anton M,Wagner D,Selbach HJ,Hackel T,Hermann RM,Hess CF,Vorwerk H

    更新日期：2009-05-07 00:00:00