A study on image quality provided by a kilovoltage cone-beam computed tomography.

Abstract:

:The image-guided radiotherapy technique (IGRT) makes use of imaging devices to verify the positions of the target volume and organs at risk during the treatment sessions. In this work we evaluate the image quality provided by an imaging system based on a kilovoltage cone-beam CT, and explore its ability to perform IGRT and adaptive radiotherapy. We analyze the accuracy of the image slice width, the spatial resolution using the MTF function, the image uniformity, the signal-to-noise ratio, the contrast-to-noise ratio, the low-contrast sensitivity, and the HU linearity with density. The studied parameters are evaluated in an objective and quantitative way, allowing for a direct comparison with other imaging devices. We conclude that the analyzed cone-beam imaging system is adequate to accurately perform IGRT within its clinical use, despite the high level of noise present in a cone beam caused by scatter. We also point out the presence of a bowtie wobble artifact in the reconstructed images. Nevertheless, we conclude that these features do not limit the capability of the system to perform adaptive radiotherapy in most cases.

journal_name

J Appl Clin Med Phys

authors

Garayoa J,Castro P

doi

10.1120/jacmp.v14i1.3888

subject

Has Abstract

pub_date

2013-01-07 00:00:00

pages

3888

issue

1

issn

1526-9914

journal_volume

14

pub_type

杂志文章
  • Dosimetric comparison of preoperative single-fraction partial breast radiotherapy techniques: 3D CRT, noncoplanar IMRT, coplanar IMRT, and VMAT.

    abstract::The purpose of this study was to compare dosimetric parameters of treatment plans among four techniques for preoperative single-fraction partial breast radiotherapy in order to select an optimal treatment technique. The techniques evaluated were noncoplanar 3D conformal radiation therapy (3D CRT), noncoplanar intensit...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i1.5126

    authors: Yoo S,Blitzblau R,Yin FF,Horton JK

    更新日期:2015-01-08 00:00:00

  • Accelerated tomotherapy delivery with TomoEdge technique.

    abstract::TomoEDGE is an advanced delivery form of tomotherapy which uses a dynamic secondary collimator. This plan comparison study describes the new features, their clinical applicability, and their effect on plan quality and treatment speed. For the first 45 patients worldwide that were scheduled for a treatment with TomoEdg...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i2.4964

    authors: Katayama S,Haefner MF,Mohr A,Schubert K,Oetzel D,Debus J,Sterzing F

    更新日期:2015-03-08 00:00:00

  • Radiographic film dosimetry for IMRT fields in the nearsurface buildup region.

    abstract::Radiographic film dosimetry provides fast, convenient 2-D dose distributions, but is challenged by the dependence of film response on scatter conditions (i.e., energy dependence). Verification of delivered dose in the surface buildup region is important for intensity modulated radiation therapy (IMRT) when volumes of ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v9i4.2782

    authors: Roberson PL,Moran JM,Kulasekere R

    更新日期:2008-10-24 00:00:00

  • On the optimization of bone SPECT/CT in terms of image quality and radiation dose.

    abstract:INTRODUCTION:The purpose of this study was to present the optimization process of CT parameters to reduce patient exposure during bone SPECT/CT without affecting the quality of SPECT images with attenuation correction (AC). MATERIAL AND METHODS:A fillable phantom reflecting realistic bone scintigraphy conditions was d...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.13069

    authors: Tulik M,Tulik P,Kowalska T

    更新日期:2020-10-27 00:00:00

  • Dose calculation for hypofractionated volumetric-modulated arc therapy: approximating continuous arc delivery and tongue-and-groove modeling.

    abstract::Hypofractionated treatments generally increase the complexity of a treatment plan due to the more stringent constraints of normal tissues and target coverage. As a result, treatment plans contain more modulated MLC motions that may require extra efforts for accurate dose calculation. This study explores methods to min...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i2.4989

    authors: Yang J,Tang G,Zhang P,Hunt M,Lim SB,LoSasso T,Mageras G

    更新日期:2016-03-08 00:00:00

  • Electrocardiogram-gated coronary CT angiography dose estimates using ImPACT.

    abstract::The primary study objective was to assess radiation doses using a modified form of the Imaging Performance Assessment of Computed Tomography (CT) scanner (ImPACT) patient dosimetry for cardiac applications on an Aquilion ONE ViSION Edition scanner, including the Ca score, target computed tomography angiography (CTA), ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i4.6218

    authors: Kobayashi M,Asada Y,Matsubara K,Suzuki S,Koshida K,Matsunaga Y,Haba T,Kawaguchi A,Toyama H,Kato R

    更新日期:2016-07-08 00:00:00

  • Interfraction positional variation in pancreatic tumors using daily breath-hold cone-beam computed tomography with visual feedback.

    abstract::We assessed interfraction positional variation in pancreatic tumors using daily breath-hold cone-beam computed tomography at end-exhalation (EE) with visual feedback (BH-CBCT). Eleven consecutive patients with pancreatic cancer who underwent BH intensity-modulated radiation therapy with visual feedback were enrolled. ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i2.5123

    authors: Nakamura M,Akimoto M,Ono T,Nakamura A,Yano S,Nakata M,Itasaka S,Mizowaki T,Shibuya K,Hiraoka M

    更新日期:2015-03-08 00:00:00

  • Assessment of error in the MV radiation isocenter position calculated with the Elekta XVI software.

    abstract::The assessment of the coincidence of imaging and radiation isocenters is an important task of regular quality assurance of medical linear accelerators (linacs) as recommended in national and international quality assurance guidelines. A previously reported investigation of the accuracy of the Elekta XVI software to lo...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12861

    authors: Chojnowski JM,Warr GB,Sykes JR,Thwaites DI

    更新日期:2020-05-01 00:00:00

  • Production of neutrons in laminated barriers of radiotherapy rooms: comparison between the analytical methodology and Monte Carlo simulations.

    abstract::The necessity to build or adapt radiotherapy rooms in reduced areas leads to the search for unconventional solutions for shielding projects. In most cases, adding metals to the primary barriers is the best alternative to shield rooms properly. However, when photons with energies equal or higher than 10 MV interact wit...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i6.5035

    authors: Rezende GF,Da Rosa LA,Facure A

    更新日期:2014-11-08 00:00:00

  • An algorithm for automated modulation transfer function measurement using an edge of a PMMA phantom: Impact of field of view on spatial resolution of CT images.

    abstract:PURPOSE:The purpose of this study was to introduce a new algorithm for automated measurement of the modulation transfer function (MTF) using an edge of a readily available phantom and to evaluate the effect of reconstruction filter and field of view (FOV) on the spatial resolution in the CT images. METHODS:Our automat...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12476

    authors: Anam C,Fujibuchi T,Budi WS,Haryanto F,Dougherty G

    更新日期:2018-11-01 00:00:00

  • Cross verification of independent dose recalculation, log files based, and phantom measurement-based pretreatment quality assurance for volumetric modulated arc therapy.

    abstract::Independent treatment planning system (TPS) check with Mobius3D software, log files based quality assurance (QA) with MobiusFX, and phantom measurement-based QA with ArcCHECK were performed and cross verified for head-and-neck (17 patients), chest (16 patients), and abdominal (19 patients) cancer patients who underwen...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.13036

    authors: Han C,Yi J,Zhu K,Zhou Y,Ai Y,Zheng X,Xie C,Jin X

    更新日期:2020-10-01 00:00:00

  • Comparison of TG-43 dosimetric parameters of brachytherapy sources obtained by three different versions of MCNP codes.

    abstract::Monte Carlo simulations are widely used for calculation of the dosimetric parameters of brachytherapy sources. MCNP4C2, MCNP5, MCNPX, EGS4, EGSnrc, PTRAN, and GEANT4 are among the most commonly used codes in this field. Each of these codes utilizes a cross-sectional library for the purpose of simulating different elem...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i2.5797

    authors: Zaker N,Zehtabian M,Sina S,Koontz C,Meigooni AS

    更新日期:2016-03-08 00:00:00

  • Dose calculation differences between Monte Carlo and pencil beam depend on the tumor locations and volumes for lung stereotactic body radiation therapy.

    abstract::Stereotactic body radiation therapy (SBRT) has been increasingly used as an efficacious treatment modality for early-stage non-small cell lung cancer. The accuracy of dose calculations is compromised due to the presence of inhomogeneity. For the purpose of a consistent prescription, radiation doses were calculated wit...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v14i2.4011

    authors: Zhuang T,Djemil T,Qi P,Magnelli A,Stephans K,Videtic G,Xia P

    更新日期:2013-03-04 00:00:00

  • Evaluation of the RUBY modular QA phantom for planar and non-coplanar VMAT and stereotactic radiations.

    abstract:PURPOSE:This study evaluates the clinical use of the RUBY modular QA phantom for linac QA to validate the integrity of IGRT workflows including the congruence of machine isocenter, imaging isocenter, and room lasers. The results have been benchmarked against those obtained with widely used systems. Additionally, the RU...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.13006

    authors: Poppinga D,Kretschmer J,Brodbek L,Meyners J,Poppe B,Looe HK

    更新日期:2020-10-01 00:00:00

  • AAPM Task Group 103 report on peer review in clinical radiation oncology physics.

    abstract::This report provides guidelines for a peer review process between two clinical radiation oncology physicists. While the Task Group's work was primarily focused on ensuring timely and productive independent reviews for physicists in solo practice, these guidelines may also be appropriate for physicists in a group setti...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章,实务指引

    doi:10.1120/jacmp.v6i4.2142

    authors: Halvorsen PH,Das IJ,Fraser M,Freedman DJ,Rice RE 3rd,Ibbott GS,Parsai EI,Robin TT Jr,Thomadsen BR,American Association of Physicists in Medicine.

    更新日期:2005-10-01 00:00:00

  • Dosimetric comparison of three intensity-modulated radiation therapies for left breast cancer after breast-conserving surgery.

    abstract:PURPOSE:This study aimed to evaluate dosimetric differences of intensity-modulated radiation therapy (IMRT) in target and normal tissues after breast-conserving surgery. METHODS:IMRT five-field plan I, IMRT six-field plan II, and field-in-field-direct machine parameter optimization-IMRT plan III were designed for each...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12287

    authors: Zhang HW,Hu B,Xie C,Wang YL

    更新日期:2018-05-01 00:00:00

  • Measurement of the interplay effect in lung IMRT treatment using EDR2 films.

    abstract::Intra-fraction organ motion during the dynamic delivery of IMRT treatment of lung tumors may cause unexpected hot/cold spots even within the target volume, due to the interplay effect between tumor motion and multi-leaf collimator (MLC) leaf motion. In the past, this has been investigated through theoretical analysis,...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v7i4.2222

    authors: Berbeco RI,Pope CJ,Jiang SB

    更新日期:2006-11-28 00:00:00

  • TOPAS Simulation of the Mevion S250 compact proton therapy unit.

    abstract::As proton therapy becomes increasingly popular, so does the need for Monte Carlo simulation studies involving accurate beam line modeling of proton treatment units. In this study, the 24 beam configurations of the Mevion S250 proton therapy system installed recently at our institution were modeled using the TOolkit fo...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12077

    authors: Prusator M,Ahmad S,Chen Y

    更新日期:2017-05-01 00:00:00

  • Dose perturbation due to the polysulfone cap surrounding a Fletcher-Williamson colpostat.

    abstract::We conducted a metrological evaluation of the dosimetric impact due to the polysulfone cap used with the Fletcher-Williamson (FW) colpostat for 192Ir high-dose rate and pulsed-dose rate intracavitary brachytherapy using Monte Carlo simulations. Polysulfone caps with diameter of 30 mm, 25 mm, 20 mm, and 16 mm (mini-ovo...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v11i1.3146

    authors: Price MJ,Kry SF,Eifel PJ,Salehpour M,Mourtada F

    更新日期:2010-01-28 00:00:00

  • Radiation treatment planning and delivery strategies for a pregnant brain tumor patient.

    abstract::The management of a pregnant patient in radiation oncology is an infrequent event requiring careful consideration by both the physician and physicist. The aim of this manuscript was to highlight treatment planning techniques and detail measurements of fetal dose for a pregnant patient recently requiring treatment for ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12262

    authors: Labby ZE,Barraclough B,Bayliss RA,Besemer AE,Dunkerley DAP,Howard SP

    更新日期:2018-09-01 00:00:00

  • Rounded leaf end modeling in Pinnacle VMAT treatment planning for fixed jaw linacs.

    abstract::During volume-modulated arc therapies (VMAT), dosimetric errors are introduced by multiple open dynamic leaf gaps that are present in fixed diaphragm linear accelerators. The purpose of this work was to develop a methodology for adjusting the rounded leaf end modeling parameters to improve out-of-field dose agreement ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i6.6343

    authors: Young LA,Yang F,Cao N,Meyer J

    更新日期:2016-11-08 00:00:00

  • Shielding assessment of a mobile electron accelerator for intra-operative radiotherapy.

    abstract::The purpose of this investigation is to measure, characterize and report stray photon leakage and scatter radiation measurements from the Mobetron, an intraoperative electron linear accelerator designed for use in an operating room environment. The study is needed due to recent changes to the shielding design of the M...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v11i4.3151

    authors: Krechetov AS,Goer D,Dikeman K,Daves JL,Mills MD

    更新日期:2010-09-07 00:00:00

  • Experience in implementing continuous arterial spin labeling on a commercial MR scanner.

    abstract::Continuous arterial spin labeling (CASL) is a technique for performing quantitative perfusion measurements without the need for exogenous contrast agent administration. This technique has seen limited use in the clinic due to problems of poor sensitivity and the potential for artifacts. In addition, CASL requires the ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 临床试验,杂志文章

    doi:10.1120/jacmp.v6i1.2068

    authors: Steger TR,Jackson EF

    更新日期:2005-01-01 00:00:00

  • Case study of radiation therapy treatment of a patient with a cardiac ventricular assist device.

    abstract::A patient with a cardiac ventricular assist device (VAD) with computer-controlled driver presented to our department for radiation therapy. The treatment plan was 4500 cGy to the rectum over 25 fractions with 15MV photon beams. All beams avoided the pump and leads. The response to electromagnetic interference (EMI) wa...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v9i4.2851

    authors: Lasher DE,Wojcicka JB,Malcom R,Shears LL

    更新日期:2008-10-29 00:00:00

  • Stereotactic IMRT for prostate cancer: setup accuracy of a new stereotactic body localization system.

    abstract::The purpose of this work is to prospectively assess the setup accuracy that can be achieved with a stereotactic body localizer (SBL) in immobilizing patients for stereotactic intensity-modulated radiotherapy (IMRT) for prostate cancer. By quantifying this important factor and target mobility in the SBL, we expect to p...

    journal_title:Journal of applied clinical medical physics

    pub_type: 临床试验,杂志文章

    doi:10.1120/jacmp.v5i2.1947

    authors: Wang L,Jacob R,Chen L,Ma C,Movsas B,Feigenberg S,Konski A

    更新日期:2004-04-01 00:00:00

  • Dosimetric benefits of respiratory gating: a preliminary study.

    abstract::In this study, we compared the amount of lung tissue irradiated when respiratory gating was imposed during expiration with the amount of lung tissue irradiated when gating was imposed during inspiration. Our hypothesis was that the amount of lung tissue spared increased as inspiration increased. Computed tomography (C...

    journal_title:Journal of applied clinical medical physics

    pub_type: 临床试验,杂志文章

    doi:10.1120/jacmp.26.146

    authors: Butler LE,Forster KM,Stevens CW,Bloch C,Liu HH,Tucker SL,Komaki R,Liao Z,Starkschall G

    更新日期:2004-01-01 00:00:00

  • Dosimetric verification of inverse planned step and shoot multileaf collimator fields from a commercial treatment planning system.

    abstract::An inverse treatment planning (ITP) module on a commercial treatment planning system (TPS) (Helax AB, Uppsala, Sweden) is being used for an in-house clinical trial for treatment of nasopharyngeal cancer with contralateral parotid sparing. Intensity modulated radiation therapy (IMRT) fields are delivered by step and sh...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v3i2.2580

    authors: MacKenzie MA,Lachaine M,Murray B,Fallone BG,Robinson D,Field GC

    更新日期:2002-04-01 00:00:00

  • Design and dosimetry characteristics of a commercial applicator system for intra-operative electron beam therapy utilizing ELEKTA Precise accelerator.

    abstract::The design concept and dosimetric characteristics of a new applicator system for intraoperative radiation therapy (IORT) are presented in this work. A new hard-docking commercial system includes polymethylmethacrylate (PMMA) applicators with different diameters and applicator end angles and a set of secondary lead col...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v11i4.3244

    authors: Nevelsky A,Bernstein Z,Bar-Deroma R,Kuten A,Orion I

    更新日期:2010-07-19 00:00:00

  • An accurate algorithm to match imperfectly matched images for lung tumor detection without markers.

    abstract::In order to locate lung tumors on kV projection images without internal markers, digitally reconstructed radiographs (DRRs) are created and compared with projection images. However, lung tumors always move due to respiration and their locations change on projection images while they are static on DRRs. In addition, gl...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i3.5200

    authors: Rozario T,Bereg S,Yan Y,Chiu T,Liu H,Kearney V,Jiang L,Mao W

    更新日期:2015-05-08 00:00:00

  • Initial clinical experience with a radiation oncology dedicated open 1.0T MR-simulation.

    abstract::The purpose of this study was to describe our experience with 1.0T MR-SIM including characterization, quality assurance (QA) program, and features necessary for treatment planning. Staffing, safety, and patient screening procedures were developed. Utilization of an external laser positioning system (ELPS) and MR-compa...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i2.5201

    authors: Glide-Hurst CK,Wen N,Hearshen D,Kim J,Pantelic M,Zhao B,Mancell T,Levin K,Movsas B,Chetty IJ,Siddiqui MS

    更新日期:2015-03-08 00:00:00