Image texture and radiation dose properties in CT.

Abstract:

:The aim of this study was to compare image noise properties of GE Discovery HD 750 and Toshiba Aquilion ONE. The uniformity section of a Catphan 600 image quality assurance phantom was scanned with both scanners, at different dose levels and with extension rings simulating patients of different sizes. 36 datasets were obtained and analyzed in terms of noise power spectrum. All the results prove that introduction of extension rings significantly altered the image quality with respect to noise properties. Without extension rings, the Toshiba scanner had lower total visible noise than GE (with GE as reference: FC18 had 82% and FC08 had 80% for 10 mGy, FC18 had 77% and FC08 74% for 15 mGy, FC18 had 80% and FC08 77% for 20 mGy). The total visible noise (TVN) for 20 and 15 mGy were similar for the phantom with the smallest additional extension ring, while Toshiba had higher TVN than GE for the 10 mGy dose level (120% FC18, 110% FC08). For the second and third ring, the GE images had lower TVN than Toshiba images for all dose levels (Toshiba TVN is greater than 155% for all cases). The results indi-cate that GE potentially has less image noise than Toshiba for larger patients. The Toshiba FC18 kernel had higher TVN than the Toshiba FC08 kernel with additional beam hardening correction for all dose levels and phantom sizes (120%, 107%, and 106% for FC18 compared to 110%, 98%, and 97%, for FC08, for 10, 15 and 20 mGy doses, respectively).

journal_name

J Appl Clin Med Phys

authors

Mozejko D,Andersen HK,Pedersen M,Waaler D,Martinsen AC

doi

10.1120/jacmp.v17i3.5900

subject

Has Abstract

pub_date

2016-05-08 00:00:00

pages

408-418

issue

3

issn

1526-9914

journal_volume

17

pub_type

杂志文章
  • Comparison of the KonRad IMRT and XiO treatment planning systems.

    abstract::Reducing the treatment time for IMRT patients is highly desirable. The objective of this work was to evaluate the new clinical Siemens KonRad inverse treatment planning system (TPS) and compare it to the CMS XiO TPS with special emphasis on the segmentation efficiency. For head and neck, liver and prostate cancer pati...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v9i3.2770

    authors: Reitz B,Miften M

    更新日期:2008-07-14 00:00:00

  • Brachytherapy treatment planning commissioning: effect of the election of proper bibliography and finite size of TG-43 input data on standard treatments.

    abstract::The aim of this work is to evaluate the performance of a commercial brachytherapy treatment planning system (TPS) with TG-43 Vendors Input Data (VID), analyze possible discrepancies with respect to a proper reference source and its implications for standard treatments, and judge the effectiveness of certain widespread...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i4.4730

    authors: Valdés CN,Píriz GH,Lozano E

    更新日期:2015-07-08 00:00:00

  • Calibration coefficients of dosimeters used in mammography for various target/filter combinations.

    abstract::A wide variety of existing combinations of target and filter materials (target/filter combinations) are used in mammography equipment. The patient dose depends on the X-ray quality that is derived from the target/filter combination, and a calibration of the dosimeter that is used in the measurement that corresponds to...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i6.5604

    authors: Sekimoto M,Katoh Y,Katoh T

    更新日期:2015-11-08 00:00:00

  • Monte Carlo calculation of beam quality correction for solid-state detectors and phantom scatter correction at 137Cs energy.

    abstract::Beam quality correction kQQo (r), which reflects the absorbed energy dependence of the detector, is calculated for solid state detector materials diamond, LiF, Li2B4O7 and Al2O3 for the 137Cs RTR brachytherapy source using the Monte Carlo-based EGSnrc code system. The study also includes calculation of detector-specif...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i1.4445

    authors: Selvam TP,Mishra S,Vishwakarma RS

    更新日期:2014-01-06 00:00:00

  • Investigation of error detection capabilities of phantom, EPID and MLC log file based IMRT QA methods.

    abstract::A patient specific quality assurance (QA) should detect errors that originate anywhere in the treatment planning process. However, the increasing complexity of treatment plans has increased the need for improvements in the accuracy of the patient specific pretreatment verification process. This has led to the utilizat...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12114

    authors: Defoor DL,Stathakis S,Roring JE,Kirby NA,Mavroidis P,Obeidat M,Papanikolaou N

    更新日期:2017-07-01 00:00:00

  • Comparative analysis for renal stereotactic body radiotherapy using Cyberknife, VMAT and proton therapy based treatment planning.

    abstract:PURPOSE:We conducted this dosimetric analysis to evaluate the feasibility of a multi-center stereotactic body radiation therapy (SBRT) trial for renal cell carcinoma (RCC) using different SBRT platforms. MATERIALS/METHODS:The computed tomography (CT) simulation images of 10 patients with unilateral RCC previously trea...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12308

    authors: Baydoun A,Vapiwala N,Ponsky LE,Awan M,Kassaee A,Sutton D,Podder TK,Zhang Y,Dobbins D,Muzic RF Jr,Traughber B,Machtay M,Ellis R

    更新日期:2018-03-14 00:00:00

  • Improving a scissor-action couch for conformal arc radiotherapy and radiosurgery.

    abstract::We have developed a method to improve the setup accuracy of a Varian Clinac 6/100 couch for delivering conformal arc therapy using a tertiary micro multileaf collimator (MLC) system. Several immobilization devices have been developed to improve the mechanical stability and isocenter alignment of the couch: turn-knob h...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v5i3.2026

    authors: Li K,Yu CX,Ma L

    更新日期:2004-07-01 00:00:00

  • Detector system dose verification comparisons for arc therapy: couch vs. gantry mount.

    abstract::The aim of this study was to assess the performance of a gantry-mounted detector system and a couch set detector system using a systematic multileaf collimator positional error manually introduced for volumetric-modulated arc therapy. Four head and neck and esophagus VMAT plans were evaluated by measurement using an e...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i3.4495

    authors: Manikandan A,Sarkar B,Nandy M,Sureka CS,Gossman MS,Sujatha N,Rajendran VT

    更新日期:2014-05-08 00:00:00

  • Reproducibility in patient-specific IMRT QA.

    abstract::The purpose of this study was to determine the reproducibility of patient-specific, intensity-modulated radiation therapy (IMRT) quality assurance (QA) results in a clinical setting. Six clinical patient plans were delivered to a variety of devices and analyses, including 1) radiographic film; 2) ion chamber; 3) 2D di...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i3.4741

    authors: McKenzie EM,Balter PA,Stingo FC,Jones J,Followill DS,Kry SF

    更新日期:2014-05-08 00:00:00

  • A quality assurance tool for helical tomotherapy using a step-wedge phantom and the on-board MVCT detector.

    abstract::The purpose of this study was to develop and evaluate filmless quality assurance (QA) tools for helical tomotherapy by using the signals from the on-board megavoltage computed tomography (MVCT) detector and applying a dedicated step-wedge phantom. The step-wedge phantom is a 15 cm long step-like aluminum block positio...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v13i1.3585

    authors: Althof V,van Haaren P,Westendorp R,Nuver T,Kramer D,Ikink M,Bel A,Minken A

    更新日期:2012-01-05 00:00:00

  • In vivo dosimetry and shielding disk alignment verification by EBT3 GAFCHROMIC film in breast IOERT treatment.

    abstract::Intraoperative electron radiation therapy (IOERT) cannot usually benefit, as conventional external radiotherapy, from software systems of treatment planning based on computed tomography and from common dose verify procedures. For this reason, in vivo film dosimetry (IVFD) proves to be an effective methodology to evalu...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i1.5065

    authors: Severgnini M,de Denaro M,Bortul M,Vidali C,Beorchia A

    更新日期:2014-01-08 00:00:00

  • Evaluation of offline adaptive planning techniques in image-guided brachytherapy of cervical cancer.

    abstract::Modern three-dimensional image-guided intracavitary high dose rate (HDR) brachytherapy is often used in combination with external beam radiotherapy (EBRT) to manage cervical cancer. Intrafraction motion of critical organs relative to the HDR applicator in the time between the planning CT and treatment delivery can cau...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12462

    authors: Liu H,Kinard J,Maurer J,Shang Q,Vanderstraeten C,Hayes L,Sintay B,Wiant D

    更新日期:2018-11-01 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

  • Dose variations in tumor volumes and organs at risk during IMRT for head-and-neck cancer.

    abstract::Many head-and-neck cancer (HNC) patients treated with radiotherapy suffer significant anatomical changes due to tumor shrinkage or weight loss. The purpose of this study was to assess dose changes over target volumes and organs at risk during intensity-modulated radiotherapy for HNC patients. Sixteen HNC IMRT patients...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v13i6.3723

    authors: Beltran M,Ramos M,Rovira JJ,Perez-Hoyos S,Sancho M,Puertas E,Benavente S,Ginjaume M,Giralt J

    更新日期:2012-11-08 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

  • 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

  • Superficial and peripheral dose in compensator-based FFF beam IMRT.

    abstract::Flattening filter-free (FFF) beams produce higher dose rates. Combined with compensator-based intensity modulated radiotherapy (IMRT) techniques, the dose delivery for each beam can be much shorter compared to the flattened beam MLC-based or flattened beam compensator-based IMRT. This 'snap shot' IMRT delivery is bene...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12018

    authors: Zhang DG,Feygelman V,Moros EG,Latifi K,Hoffe S,Frakes J,Zhang GG

    更新日期:2017-01-01 00:00:00

  • Gamma Knife® icon CBCT offers improved localization workflow for frame-based treatment.

    abstract:OBJECT:The purpose of this study was to compare two methods of stereotactic localization in Gamma Knife treatment planning: cone beam computed tomography (CBCT) or fiducial. While the fiducial method is the traditional method of localization, CBCT is now available for use with the Gamma Knife Icon. This study seeks to ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12745

    authors: Duggar WN,Morris B,Fatemi A,Bonds J,He R,Kanakamedala M,Rey-Dios R,Vijayakumar S,Yang C

    更新日期:2019-11-01 00:00:00

  • Applying three different methods of measuring CTDIfree air to the extended CTDI formalism for wide-beam scanners (IEC 60601-2-44): A comparative study.

    abstract:PURPOSE:The weighted CT dose index (CTDIw ) has been extended for a nominal total collimation width (nT) greater than 40 mm and relies on measurements of CTDIfreeair. The purpose of this work was to compare three methods of measuring CTDIfreeair and subsequent calculations of CTDIw to investigate their clinical appropr...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12363

    authors: Bujila R,Kull L,Danielsson M,Andersson J

    更新日期:2018-07-01 00:00:00

  • Technical Note: Comparison of the internal target volume (ITV) contours and dose calculations on 4DCT, average CBCT, and 4DCBCT imaging for lung stereotactic body radiation therapy (SBRT).

    abstract:PURPOSE:To investigate the differences between internal target volumes (ITVs) contoured on the simulation 4DCT and daily 4DCBCT images for lung cancer patients treated with stereotactic body radiotherapy (SBRT) and determine the dose delivered on 4D planning technique. METHODS:For nine patients, 4DCBCTs were acquired ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.13041

    authors: Dumas M,Laugeman E,Sevak P,Snyder KC,Mao W,Chetty IJ,Ajlouni M,Wen N

    更新日期:2020-10-12 00:00:00

  • Evaluation of the MIM Symphony treatment planning system for low-dose-rate- prostate brachytherapy.

    abstract::MIM Symphony is a recently introduced low-dose-rate prostate brachytherapy treatment planning system (TPS). We evaluated the dosimetric and planning accuracy of this new TPS compared to the universally used VariSeed TPS. For dosimetric evaluation of the MIM Symphony version 5.4 TPS, we compared dose calculations from ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i5.5057

    authors: Dhanesar SK,Lim TY,Du W,Bruno TL,Frank SJ,Kudchadker RJ

    更新日期:2015-09-08 00:00:00

  • Determination of the photon beam attenuation by the Brainlab imaging couch: angular and field size dependence.

    abstract::Highly attenuating radiation treatment couches are no longer useful in the present era of radiotherapy utilizing IMRT and IGRT. Carbon fibers couch tops with its high tensile strength and low density present a useful alternative. The objective of the current study was to quantify the attenuation of megavoltage photons...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v10i3.2979

    authors: Njeh CF,Raines TW,Saunders MW

    更新日期:2009-06-02 00:00:00

  • Prostate volumetric-modulated arc therapy: dosimetry and radiobiological model variation between the single-arc and double-arc technique.

    abstract::This study investigates the dosimetry and radiobiological model variation when a second photon arc was added to prostate volumetric-modulated arc therapy (VMAT) using the single-arc technique. Dosimetry and radiobiological model comparison between the single-arc and double-arc prostate VMAT plans were performed on fiv...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v14i3.4053

    authors: Chow JC,Jiang R

    更新日期:2013-05-06 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

  • Automating checks of plan check automation.

    abstract::While a few physicists have designed new plan check automation solutions for their clinics, fewer, if any, managed to adapt existing solutions. As complex and varied as the systems they check, these programs must gain the full confidence of those who would run them on countless patient plans. The present automation ef...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i4.4889

    authors: Halabi T,Lu HM

    更新日期:2014-07-08 00:00:00

  • Use of a radioactive check device for redundancy check of ionization chambers.

    abstract::The use of a radioactive check device containing Strontium 90 was investigated to carry out the redundancy checks of Farmer-type ionization chambers. It was not possible to meet the recommended tolerance limits of the redundancy checks without taking into account the angular response of the ionization chambers. The io...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v1i4.2636

    authors: Sidhu NP,Rouvas A,Cadman P

    更新日期:2000-10-01 00:00:00

  • Two-dimensional solid-state array detectors: A technique for in vivo dose verification in a variable effective area.

    abstract:PURPOSE:We introduce a technique that employs a 2D detector in transmission mode (TM) to verify dose maps at a depth of dmax in Solid Water. TM measurements, when taken at a different surface-to-detector distance (SDD), allow for the area at dmax (in which the dose map is calculated) to be adjusted. METHODS:We conside...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12744

    authors: Utitsarn K,Biasi G,Stansook N,Alrowaili ZA,Petasecca M,Carolan M,Perevertaylo VL,Tomé WA,Kron T,Lerch MLF,Rosenfeld AB

    更新日期:2019-11-01 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

  • Quality assurance for a six degrees-of-freedom table using a 3D printed phantom.

    abstract:PURPOSE:To establish a streamlined end-to-end test of a 6 degrees-of-freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance. METHODS:A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball-bearing (BB). The phantom underwent each step o...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12227

    authors: Woods K,Ayan AS,Woollard J,Gupta N

    更新日期:2018-01-01 00:00:00

  • Development of a stereoscopic CT metal artifact management algorithm using gantry angle tilts for head and neck patients.

    abstract::Dental amalgams are a common source of artifacts in head and neck (HN) images. Commercial artifact reduction techniques have been offered, but are substantially ineffectual at reducing artifacts from dental amalgams, can produce additional artifacts, provide inaccurate HU information, or require extensive computation ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12922

    authors: Branco D,Kry S,Taylor P,Rong J,Zhang X,Peterson C,Frank S,Followill D

    更新日期:2020-08-01 00:00:00