The performance of the progressive resolution optimizer (PRO) for RapidArc planning in targets with low-density media.

Abstract:

:A new version of progressive resolution optimizer (PRO) with an option of air cavity correction has been implemented for RapidArc volumetric-modulated arc therapy (RA). The purpose of this study was to compare the performance of this new PRO with the use of air cavity correction option (PRO10_air) against the one without the use of the air cavity correction option (PRO10_no-air) for RapidArc planning in targets with low-density media of different sizes and complexities. The performance of PRO10_no-air and PRO10_air was initially compared using single-arc plans created for four different simple heterogeneous phantoms with virtual targets and organs at risk. Multiple-arc planning of 12 real patients having nasopharyngeal carcinomas (NPC) and ten patients having non-small cell lung cancer (NSCLC) were then performed using the above two options for further comparison. Dose calculations were performed using both the Acuros XB (AXB) algorithm with the dose to medium option and the analytical anisotropic algorithm (AAA). The effect of using intermediate dose option after the first optimization cycle in PRO10_air and PRO10_no-air was also investigated and compared. Plans were evaluated and compared using target dose coverage, critical organ sparing, conformity index, and dose homogeneity index. For NSCLC cases or cases for which large volumes of low-density media were present in or adjacent to the target volume, the use of the air cavity correction option in PRO10 was shown to be beneficial. For NPC cases or cases for which small volumes of both low- and high-density media existed in the target volume, the use of air cavity correction in PRO10 did not improve the plan quality. Based on the AXB dose calculation results, the use of PRO10_air could produce up to 18% less coverage to the bony structures of the planning target volumes for NPC cases. When the intermediate dose option in PRO10 was used, there was negligible difference observed in plan quality between optimizations with and without using the air cavity correction option.

journal_name

J Appl Clin Med Phys

authors

Kan MW,Leung LH,Yu PK

doi

10.1120/jacmp.v14i6.4382

subject

Has Abstract

pub_date

2013-11-04 00:00:00

pages

4382

issue

6

issn

1526-9914

journal_volume

14

pub_type

杂志文章
  • Assessment of an organ-based tube current modulation in thoracic computed tomography.

    abstract::Recently, specific computed tomography (CT) scanners have been equipped with organ-based tube current modulation (TCM) technology. It is possible that organ-based TCM will replace the conventional dose-reduction technique of reducing the effective milliampere-second. The aim of this study was to determine if organ-bas...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v13i2.3731

    authors: Matsubara K,Sugai M,Toyoda A,Koshida H,Sakuta K,Takata T,Koshida K,Iida H,Matsui O

    更新日期:2012-03-08 00:00:00

  • 100 days with scans of the same Catphan phantom on the same CT scanner.

    abstract::Quality control (QC) of CT scanners is important to evaluate image quality and radiation dose. Different QC phantoms for testing image quality parameters on CT are commercially available, and Catphan phantoms are widely used for this purpose. More data from measured image quality parameters on CT are necessary to asse...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12186

    authors: Husby E,Svendsen ED,Andersen HK,Martinsen ACT

    更新日期:2017-11-01 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

  • The development of a 4D treatment planning methodology to simulate the tracking of central lung tumors in an MRI-linac.

    abstract:PURPOSE:Targeting and tracking of central lung tumors may be feasible on the Elekta MRI-linac (MRL) due to the soft-tissue visualization capabilities of MRI. The purpose of this work is to develop a novel treatment planning methodology to simulate tracking of central lung tumors with the MRL and to quantify the benefit...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12233

    authors: Al-Ward SM,Kim A,McCann C,Ruschin M,Cheung P,Sahgal A,Keller BM

    更新日期:2018-01-01 00:00:00

  • Physical and biological impacts of collimator-scattered protons in spot-scanning proton therapy.

    abstract::To improve the penumbra of low-energy beams used in spot-scanning proton therapy, various collimation systems have been proposed and used in clinics. In this paper, focused on patient-specific brass collimators, the collimator-scattered protons' physical and biological effects were investigated. The Geant4 Monte Carlo...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12653

    authors: Ueno K,Matsuura T,Hirayama S,Takao S,Ueda H,Matsuo Y,Yoshimura T,Umegaki K

    更新日期:2019-07-01 00:00:00

  • Contour-based lung dose prediction for breast proton therapy.

    abstract:PURPOSE:This study evaluates the feasibility of lung dose prediction based on target contour and patient anatomy for breast patients treated with proton therapy. METHODS:Fifty-two randomly selected patients were included in the cohort, who were treated to 50.4-66.4 Gy(RBE) to the left (36), right (15), or bilateral (1...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章,随机对照试验

    doi:10.1002/acm2.12436

    authors: Zeng C,Sine K,Mah D

    更新日期:2018-11-01 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

  • Retrospective analysis of linear accelerator output constancy checks using process control techniques.

    abstract::Shewhart control charts have previously been suggested as a process control tool for use in routine linear accelerator (linac) output verifications. However, a comprehensive approach to process control has not been investigated for linac output verifications. The purpose of this work is to investigate a comprehensive ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v14i1.4032

    authors: Sanghangthum T,Suriyapee S,Srisatit S,Pawlicki T

    更新日期:2013-01-07 00:00:00

  • Modeling Elekta VersaHD using the Varian Eclipse treatment planning system for photon beams: A single-institution experience.

    abstract::The aim of this study was to report a single-institution experience and commissioning data for Elekta VersaHD linear accelerators (LINACs) for photon beams in the Eclipse treatment planning system (TPS). Two VersaHD LINACs equipped with 160-leaf collimators were commissioned. For each energy, the percent-depth-dose (P...

    journal_title:Journal of applied clinical medical physics

    pub_type: 临床试验,杂志文章

    doi:10.1002/acm2.12709

    authors: Zhang Y,Le AH,Tian Z,Iqbal Z,Chiu T,Gu X,Pugachev A,Reynolds R,Park YK,Lin MH,Stojadinovic S

    更新日期:2019-10-01 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

  • Deriving detector-specific correction factors for rectangular small fields using a scintillator detector.

    abstract::The goal of this study was to investigate small field output factors (OFs) for flat-tening filter-free (FFF) beams on a dedicated stereotactic linear accelerator-based system. From this data, the collimator exchange effect was quantified, and detector-specific correction factors were generated. Output factors for 16 j...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i6.6433

    authors: Qin Y,Zhong H,Wen N,Snyder K,Huang Y,Chetty IJ

    更新日期:2016-11-08 00:00:00

  • Monte Carlo investigation of collapsed versus rotated IMRT plan verification.

    abstract::IMRT QA requires, among other tests, a time-consuming process of measuring the absorbed dose, at least to a point, in a high-dose, low-dose-gradient region. Some clinics use a technique of measuring this dose with all beams delivered at a single gantry angle (collapsed delivery), as opposed to the beams delivered at t...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i3.4681

    authors: Conneely E,Alexander A,Ruo R,Chung E,Seuntjens J,Foley MJ

    更新日期:2014-05-08 00:00:00

  • Development of a treatment planning protocol for prostate treatments using intensity modulated radiotherapy.

    abstract::We have developed a treatment planning protocol for intensity-modulated radiation therapy of the prostate using commercially available inverse planning software. Treatment plans were developed for ten patients using the Corvus version 3.8 planning system, testing various prescription options, including tissue types, d...

    journal_title:Journal of applied clinical medical physics

    pub_type: 临床试验,杂志文章

    doi:10.1120/jacmp.v2i2.2614

    authors: Ezzell GA,Schild SE,Wong WW

    更新日期:2001-04-01 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

  • Impact of grid size on uniform scanning and IMPT plans in XiO treatment planning system for brain cancer.

    abstract::The main purposes of this study are to: 1) evaluate the accuracy of XiO treatment planning system (TPS) for different dose calculation grid size based on head phan-tom measurements in uniform scanning proton therapy (USPT); and 2) compare the dosimetric results for various dose calculation grid sizes based on real com...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i5.5510

    authors: Rana S,Zheng Y

    更新日期:2015-09-08 00:00:00

  • Dosimetric characteristics of LinaTech DMLC H multi leaf collimator: Monte Carlo simulation and experimental study.

    abstract::This study evaluated the basic dosimetric characteristics of a Dynamic Multi Leaf Collimator (DMLC) using a diode detector and film measurements for Intensity Modulated Radiation Therapy Quality Assurance (IMRT QA). The EGSnrc Monte Carlo (MC) simulation system was used for the determination of MLC characteristics. Ra...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12055

    authors: Molazadeh M,Zeinali A,Robatjazi M,Shirazi A,Geraily G

    更新日期:2017-03-01 00:00:00

  • Understanding the impact of RapidArc therapy delivery errors for prostate cancer.

    abstract::The purpose of this study is to simulate random and systematic RapidArc delivery errors for external beam prostate radiotherapy plans in order to determine the dose sensitivity for each error type. Ten prostate plans were created with a single 360° arc. The DICOM files for these treatment plans were then imported into...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v12i3.3409

    authors: Oliver M,Bush K,Zavgorodni S,Ansbacher W,Beckham WA

    更新日期:2011-05-20 00:00:00

  • Generation and verification of QFix kVue Calypso-compatible couch top model for a dedicated stereotactic linear accelerator with FFF beams.

    abstract::This study details the generation, verification, and implementation of a treatment planning system (TPS) couch top model for patient support system used in conjunction with a dedicated stereotactic linear accelerator. Couch top model was created within the TPS using CT simulation images of the kVue Calpyso-compatible ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v16i4.5441

    authors: Gardner SJ,Gulam M,Song K,Li H,Huang Y,Zhao B,Qin Y,Snyder K,Kim J,Gordon J,Chetty IJ,Wen N

    更新日期:2015-07-08 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

  • A novel and clinically useful dynamic conformal arc (DCA)-based VMAT planning technique for lung SBRT.

    abstract:PURPOSE:Volumetric modulated arc therapy (VMAT) is gaining popularity for stereotactic treatment of lung lesions for medically inoperable patients. Due to multiple beamlets in delivery of highly modulated VMAT plans, there are dose delivery uncertainties associated with small-field dosimetry error and interplay effects...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12878

    authors: Pokhrel D,Visak J,Sanford L

    更新日期:2020-07-01 00:00:00

  • Accurate method for evaluating the duration of the entire radiotherapy process.

    abstract:BACKGROUND AND PURPOSE:Along with the increasing demand for high-quality radiotherapy and the growing number of high-precision radiotherapy devices, precise radiotherapy workflow management and accurate time evaluation of the entire radiotherapy process are crucial to providing appropriate, timely treatment for cancer ...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12959

    authors: Guo C,Huang P,Li Y,Dai J

    更新日期:2020-09-01 00:00:00

  • Effectiveness of a novel gas-release endorectal balloon in the removal of rectal gas for prostate proton radiation therapy.

    abstract::Endorectal balloons (ERBs) are routinely used in prostate proton radiation therapy to immobilize the prostate and spare the rectal wall. Rectal gas can distend the rectum and displace the prostate even in the presence of ERBs. The purpose of this work was to quantify the effects an ERB with a passive gas release condu...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v13i5.3945

    authors: Wootton LS,Kudchadker RJ,Beddar AS,Lee AK

    更新日期:2012-09-06 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

  • Voxel-based supervised machine learning of peripheral zone prostate cancer using noncontrast multiparametric MRI.

    abstract:PURPOSE:The aim of this study was to develop and assess the performance of supervised machine learning technique to classify magnetic resonance imaging (MRI) voxels as cancerous or noncancerous using noncontrast multiparametric MRI (mp-MRI), comprised of T2-weighted imaging (T2WI), diffusion-weighted imaging (DWI), and...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12992

    authors: Gholizadeh N,Simpson J,Ramadan S,Denham J,Lau P,Siddique S,Dowling J,Welsh J,Chalup S,Greer PB

    更新日期:2020-10-01 00:00:00

  • Surface imaging-based analysis of intrafraction motion for breast radiotherapy patients.

    abstract::Breast treatments are becoming increasingly complex as the use of modulated and partial breast therapies becomes more prevalent. These methods are predicated on accurate and precise positioning for treatment. However, the ability to quantify intrafraction motion has been limited by the excessive dose that would result...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v15i6.4957

    authors: Wiant DB,Wentworth S,Maurer JM,Vanderstraeten CL,Terrell JA,Sintay BJ

    更新日期:2014-11-08 00:00:00

  • Evaluation and verification of the QFix EncompassTM couch insert for intracranial stereotactic radiosurgery.

    abstract::The QFix EncompassTM stereotactic radiosurgery (SRS) immobilization system consists of a thermoplastic mask that attaches to the couch insert to immobilize patients treated with intracranial SRS. This study evaluates the dosimetric impact and verifies a vendor provided treatment planning system (TPS) model in the Ecli...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12387

    authors: Snyder KC,Xhaferllari I,Huang Y,Siddiqui MS,Chetty IJ,Wen N

    更新日期:2018-07-01 00:00:00

  • Effect of electron contamination on in vivo dosimetry for lung block shielding during TBI.

    abstract::Our institution performs in vivo verification measurement for each of our total body irradiation (TBI) patients with optically stimulated luminescent dosimeters (OSLD). The lung block verification measurements were commonly higher than expected. The aim of this work is to understand this discrepancy and improve the ac...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1120/jacmp.v17i3.6128

    authors: Narayanasamy G,Cruz W,Saenz DL,Stathakis S,Papanikolaou N,Kirby N

    更新日期:2016-05-08 00:00:00

  • Bleeding detection in wireless capsule endoscopy videos - Color versus texture features.

    abstract::Wireless capsule endoscopy (WCE) is an effective technology that can be used to make a gastrointestinal (GI) tract diagnosis of various lesions and abnormalities. Due to a long time required to pass through the GI tract, the resulting WCE data stream contains a large number of frames which leads to a tedious job for c...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12662

    authors: Pogorelov K,Suman S,Azmadi Hussin F,Saeed Malik A,Ostroukhova O,Riegler M,Halvorsen P,Hooi Ho S,Goh KL

    更新日期:2019-08-01 00:00:00

  • Optimization of intra-voxel incoherent motion measurement in diffusion-weighted imaging of breast cancer.

    abstract:PURPOSE:The purpose of this study was to optimize intra-voxel incoherent motion (IVIM) measurement in diffusion-weighted imaging (DWI) of breast cancer by separating perfusion and diffusion effects through the determination of an optimal threshold b-value, thus benign and cancerous breast tissues can be accurately diff...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12065

    authors: Chen W,Zhang J,Long D,Wang Z,Zhu JM

    更新日期:2017-05-01 00:00:00

  • On the use of bolus for pacemaker dose measurement and reduction in radiation therapy.

    abstract::Special attention is required in planning and administering radiation therapy to patients with cardiac implantable electronic devices (CIEDs), such as pacemaker and defibrillator. The range of dose to CIEDs that can induce malfunction is large among CIEDs. Clinically significant defects have been reported at dose as l...

    journal_title:Journal of applied clinical medical physics

    pub_type: 杂志文章

    doi:10.1002/acm2.12229

    authors: Yan H,Guo F,Zhu D,Stryker S,Trumpore S,Roberts K,Higgins S,Nath R,Chen Z,Liu W

    更新日期:2018-01-01 00:00:00