Megavoltage CT in helical tomotherapy - clinical advantages and limitations of special physical characteristics.

Abstract:

:Helical tomotherapy is a form of image-guided intensity-modulated radiotherapy that introduces the ring gantry concept into radiation oncology. The system is a combination of a therapeutic linear accelerator and a megavoltage CT-scanner. This work describes the clinical experience with megavoltage CT with 456 patients in more than 11000 fractions. It also provides a review of the current literature of the possibilities and limitations of megavoltage CT. Between July 2006 and October 2008 456 patients were treated with helical tomotherapy and a pretreatment megavoltage CT was performed in 98.1% of the 11821 fractions to perform position control and correction. CT image acquisition was done with 3.5 MV x-rays in the helical tomotherapy machine. MVCT was used for dose recalculations to quantify doses distributions in cases of changing geometry, tumor shrinkage or presence of metal implants. Inverse treatment planning for prostate cancer patients with bilateral hip replacements was performed based upon an MVCT. A mean 3D-correction vector of 7.1mm with a considerable variation was detected and immediately corrected. Mean shifts were lateral 0.9mm (sd 5.0mm), mean longitudinal shift 1.0mm (sd 5.1mm) and mean vertical shift 3.2mm (sd 5.2mm). The MVCT enables imaging of anatomical structures in the presence of dental metal or orthopedic implants. Especially in these cases, dose recomputations can increase the precision of dose calculations. Due to a mean 3d correction vector of more than 7mm and a variation of corrections of more than 5mm daily image-guidance is recommended to achieve a precise dose application. The MVCT shows evident advantages in cases with metal implants but has limitations due to a reduced soft tissue contrast. Compared with megavoltage cone-beam-CT the tomotherapy fan beam CT adds less extra dose fore the patient and has a better soft tissue contrast.

authors

Sterzing F,Kalz J,Sroka-Perez G,Schubert K,Bischof M,Roder F,Debus J,Herfarth K

doi

10.1177/153303460900800504

subject

Has Abstract

pub_date

2009-10-01 00:00:00

pages

343-52

issue

5

eissn

1533-0346

issn

1533-0338

pii

d=3036&c=4295&p=17733&do=detail

journal_volume

8

pub_type

杂志文章
  • Enhancing the effectiveness of drug-based cancer therapy by electroporation (electropermeabilization).

    abstract::Many conventional chemotherapeutic drugs, as well as DNA for cancer gene therapy, require efficient access to the cell interior to be effective. The cell membrane is a formidable barrier to many of these drugs, including therapeutic DNA constructs. Electropermeabilization (EP, often used synonymously with "electropora...

    journal_title:Technology in cancer research & treatment

    pub_type: 临床试验,杂志文章,多中心研究

    doi:10.1177/153303460200100110

    authors: Rabussay DP,Nanda GS,Goldfarb PM

    更新日期:2002-02-01 00:00:00

  • Modeling and sensitivity analysis of acoustic release of Doxorubicin from unstabilized pluronic P105 using an artificial neural network model.

    abstract::This paper models steady state acoustic release of Doxorubicin (Dox) from Pluronic P105 micelles using Artificial Neural Networks (ANN). Previously collected release data were compiled and used to train, validate, and test an ANN model. Sensitivity analysis was then performed on the following operating conditions: ult...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/153303460700600107

    authors: Husseini GA,Abdel-Jabbar NM,Mjalli FS,Pitt WG

    更新日期:2007-02-01 00:00:00

  • Feasibility of a Modified Biopsy Needle for Irreversible Electroporation Ablation and Periprocedural Tissue Sampling.

    abstract:OBJECTIVES:To test the feasibility of modified biopsy needles as probes for irreversible electroporation ablation and periprocedural biopsy. METHODS:Core biopsy needles of 16-G/9-cm were customized to serve as experimental ablation probes. Computed tomography-guided percutaneous irreversible electroporation was perfor...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533034615608739

    authors: Wimmer T,Srimathveeravalli G,Silk M,Monette S,Gutta N,Maybody M,Erinjery JP,Coleman JA,Solomon SB,Sofocleous CT

    更新日期:2016-12-01 00:00:00

  • Selecting the optimum particle for radiation therapy.

    abstract::Ionizing radiation therapy is one of the primary modalities for treating cancers. Ideally, the particle selected to deliver ionizing radiation for routine therapy should control the disease, cause minimal side effects, and be affordable. Two major properties for judging the utility of a particle, physical controllabil...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/15330346070060S406

    authors: Slater JM

    更新日期:2007-08-01 00:00:00

  • Prediction of Prognostic Biomarkers and Construction of an Autophagy Prognostic Model for Colorectal Cancer Using Bioinformatics.

    abstract:OBJECTIVE:The incidence of colorectal cancer is increasing every year, and autophagy may be related closely to the pathogenesis of colorectal cancer. Autophagy is a natural catabolic mechanism that allows the degradation of cellular components in eukaryotic cells. However, autophagy plays a dual role in tumorigenesis. ...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820984177

    authors: Liu TT,Liu SM

    更新日期:2020-01-01 00:00:00

  • Models of light propagation in human tissue applied to cancer diagnostics.

    abstract::Optical methods such as reflectance and fluorescence spectroscopy are being investigated for their potential to aid cancer detection in a quantitative, minimally invasive manner. Mathematical models of reflectance and fluorescence provide an important link between measured optical data and biomedically-relevant tissue...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章,评审

    doi:10.7785/tcrt.2012.500187

    authors: Wilson RH,Mycek MA

    更新日期:2011-04-01 00:00:00

  • Lymph Node Ratio Rather Than Positive Lymph Node Counts Has Better Prognostic Value in Patients With Testicular Germ Cell Tumors.

    abstract:BACKGROUND:Testicular cancer represents the most common malignancy in young adult men. In the current study, we sought to analyze and compare the prognostic value of lymph node ratio (LNR) as well as positive lymph node counts (LNC) to understand its clinical significance in testicular germ cell tumors. METHODS:We emp...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820979702

    authors: Huang C,Long Q,Pan Y,Wu L,Wang X,Xu H,Zheng F

    更新日期:2021-01-01 00:00:00

  • Inhibition of glucose transporter 1 (GLUT1) chemosensitized head and neck cancer cells to cisplatin.

    abstract::Glucose transporter 1 (GLUT1) facilitates the cellular uptake of glucose and is overexpressed in most cancers. The altered expression of GLUT1 may influence the sensitivity of tumor cells to chemotherapy. This study investigated whether the knockdown of GLUT1 expression to sensitize head and neck cancer cells to the c...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.7785/tcrt.2012.500343

    authors: Wang YD,Li SJ,Liao JX

    更新日期:2013-12-01 00:00:00

  • Screening of Prognostic Factors in Early-Onset Breast Cancer.

    abstract:BACKGROUND:Gene expression profiles from early-onset breast cancer and normal tissues were analyzed to explore the genes and prognostic factors associated with breast cancer. METHODS:GSE109169 and GSE89116 were obtained from the database of Gene Expression Omnibus. We firstly screened the differentially expressed gene...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033819893670

    authors: Yu Z,He Q,Xu G

    更新日期:2020-01-01 00:00:00

  • Advanced Small Animal Conformal Radiation Therapy Device.

    abstract::We have developed a small animal conformal radiation therapy device that provides a degree of geometrical/anatomical targeting comparable to what is achievable in a commercial animal irradiator. small animal conformal radiation therapy device is capable of producing precise and accurate conformal delivery of radiation...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533034615626011

    authors: Sharma S,Narayanasamy G,Przybyla B,Webber J,Boerma M,Clarkson R,Moros EG,Corry PM,Griffin RJ

    更新日期:2017-02-01 00:00:00

  • Identical Quality Assurance for Volumetric Modulated Arc Therapy in Elekta and Varian Machines.

    abstract::Volumetric modulated arc therapy (VMAT) has been adopted by many clinics for its higher delivery efficiency compared to conventional intensity modulated radiotherapy techniques. Currently, the quality assurance (QA) has remained a challenge in that no identical tests are available for accelerators from different vendo...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533034614500419

    authors: Wang J,Hu W,Peng J,Lu S,Zhao J,Xiao Y,Zhang Z

    更新日期:2015-08-01 00:00:00

  • Quantitative analysis of three-dimensional conformal radiotherapy techniques for posterior fossa treatment in children.

    abstract::Numerous beam directions using 3-D conformal techniques can be employed in treating tumors in the posterior fossa, each with characteristic normal tissue exposure along the entrance and exit trajectory. A representative variety of beam configurations were modeled in a modern computer planning system initially with the...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/153303460300200611

    authors: Timmerman RD,Ewing M,Donges M,Wilson J,Jakacki R,Randall ME

    更新日期:2003-12-01 00:00:00

  • Diagnostic Value of Contrast-Enhanced Ultrasonography With SonoVue in the Differentiation of Benign and Malignant Breast Lesions: A Meta-Analysis.

    abstract:PURPOSE:A meta-analysis was conducted to evaluate the diagnostic performance of contrast-enhanced ultrasonography using the contrast agent SonoVue to differentiate benign from malignant breast lesions. METHOD:A comprehensive search of the literature was performed using the Embase, PubMed, and Web of Science databases ...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820971583

    authors: Lu J,Zhou P,Jin C,Xu L,Zhu X,Lian Q,Gong X

    更新日期:2020-01-01 00:00:00

  • Correlation Between Uptake of 18F-FDG During PET/CT and Ki-67 Expression in Patients Newly Diagnosed With Multiple Myeloma Having Extramedullary Involvement.

    abstract::The aim of this study was to evaluate the relationship of prognosis of patients with multiple myeloma having extramedullary involvement (EMM) with the 18F- fluorodeoxyglucose(18F-FDG) maximum standardized uptake value and the expression of Ki-67 in biopsy samples. Sixty-five patients were newly diagnosed with multiple...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033819849067

    authors: Li Q,Ma J,Li H,Xu W,Cao Z,Liu S,Chen L,Gao S,Yan T,Li D,Wang X,Yue Y,Zhao Z,Wang X,Yang H,Zhao H,Yu Y,Zhang Y,Fan F,Wang Y

    更新日期:2019-01-01 00:00:00

  • EZH2 regulates the expression of p16 in the nasopharyngeal cancer cells.

    abstract::The increasing evidence supported the role of Enhancer of Zeste Homolog 2 (EZH2) in the cancer development and progression. However, its precise role in the tumorigenesis of Nasopharyngeal Carcinoma (NPC) remains to be elucidated. EZH2 was depleted by retroviral infection in the NPC cells (HK-1, CNE-2, CNE-1 and C666-...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.7785/tcrt.2012.500315

    authors: Zhong J,Min L,Huang H,Li L,Li D,Li J,Ma Z,Dai L

    更新日期:2013-06-01 00:00:00

  • Serum lncRNA TINCR Serve as a Novel Biomarker for Predicting the Prognosis in Triple-Negative Breast Cancer.

    abstract:BACKGROUND:Tissue differentiation-inducing non-protein coding RNA (TINCR) has been shown to play a crucial role in pathogenesis of various types of human cancer including breast cancer (BC). The purpose of this study was to determine the potential prognostic value of serum lncRNA TINCR in BC. METHODS:Quantitative reve...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820965574

    authors: Wang X,Li S,Xiao H,Deng X

    更新日期:2020-01-01 00:00:00

  • Antitumor Effects of DC Vaccine With ALA-PDT-Induced Immunogenic Apoptotic Cells for Skin Squamous Cell Carcinoma in Mice.

    abstract::Targeted immunotherapy using dendritic cell vaccine has been employed for the treatment of solid tumors. Topical 5-aminolevulinic acid-mediated photodynamic therapy, an established approach for topical cancers, can induce an effective antitumor immune response. We have previously shown that 5-aminolevulinic acid-media...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033818785275

    authors: Zhang H,Wang P,Wang X,Shi L,Fan Z,Zhang G,Yang D,Bahavar CF,Zhou F,Chen WR,Wang X

    更新日期:2018-01-01 00:00:00

  • The Potential Role of Intensity-Modulated Proton Therapy in Hepatic Carcinoma in Mitigating the Risk of Dose De-Escalation.

    abstract:PURPOSE:To investigate the role of intensity-modulated proton therapy (IMPT) for hepatocellular carcinoma (HCC) patients to be treated with stereotactic body radiation therapy (SBRT) in a risk-adapted dose prescription regimen. METHODS:A cohort of 30 patients was retrospectively selected as "at-risk" of dose de-escala...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820980412

    authors: Cozzi L,Comito T,Loi M,Fogliata A,Franzese C,Franceschini D,Clerici E,Reggiori G,Tomatis S,Scorsetti M

    更新日期:2020-01-01 00:00:00

  • Convection-enhanced delivery of interleukin-13 receptor-directed cytotoxin for malignant glioma therapy.

    abstract::The treatment of patients with malignant brain tumors, in particular glioblastoma multiforme (GBM) is very challenging because of their diffuse infiltrative nature and the cytological heterogeneity. The median survival of patients with newly diagnosed GBM is only 12-15 months, and only 8-12% of them survive for two ye...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章,评审

    doi:10.1177/153303460600500307

    authors: Kioi M,Husain SR,Croteau D,Kunwar S,Puri RK

    更新日期:2006-06-01 00:00:00

  • LncRNA-SRA1 Suppresses Osteosarcoma Cell Proliferation While Promoting Cell Apoptosis.

    abstract:OBJECTIVE:Osteosarcoma is a common malignant bone tumor that is frequently found in the long bones of children and adolescents. The aim of this study is to examine long noncoding RNA-steroid receptor RNA activator 1 expression in osteosarcoma to explore the biological function of long noncoding RNA steroid receptor RNA...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033819841438

    authors: Guo W,Jiang H,Li H,Li F,Yu Q,Liu Y,Jiang W,Zhang M

    更新日期:2019-01-01 00:00:00

  • Prognostic Role of Neutrophil to Lymphocyte Ratio in Ovarian Cancer: A Meta-Analysis.

    abstract:OBJECTIVE:The aim of the study was to investigate the prognostic role of neutrophil to lymphocyte ratio in ovarian cancer. Growing number of articles reported the relationship between neutrophil to lymphocyte ratio and prognosis in ovarian cancer, but the results remains inconclusive. The meta-analysis was conducted to...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章,meta分析

    doi:10.1177/1533033818791500

    authors: Chen G,Zhu L,Yang Y,Long Y,Li X,Wang Y

    更新日期:2018-01-01 00:00:00

  • B4GalT1 Regulates Apoptosis and Autophagy of Glioblastoma In Vitro and In Vivo.

    abstract::Our study was designed to investigate the role of B4GalT1 in glioblastoma, in vitro and in vivo, to detect whether B4GalT1 knockdown could regulate the development of glioblastoma, and further observe the relationship between B4GalT1 knockdown and the apoptosis and autophagy of glioblastoma. To begin, we looked at TCG...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820980104

    authors: Wang P,Li X,Xie Y

    更新日期:2020-01-01 00:00:00

  • Evaluation of Photoneutron Dose Measured by Bubble Detectors in Conventional Linacs and Cyberknife Unit: Effective Dose and Secondary Malignancy Risk Estimation.

    abstract::This study aims to reduce the uncertainty about the photoneutron dose produced over a course of radiotherapy with high-energy photon beams and evaluate photoneutron contamination-based secondary malignancy risk for different treatment modalities. Dosimetric measurements were taken in Philips SL25/75, Elekta Synergy Pl...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533034615592106

    authors: Biltekin F,Yeginer M,Ozyigit G

    更新日期:2016-08-01 00:00:00

  • Current status of salvage cryoablation for prostate cancer following radiation failure.

    abstract::The role of salvage cryoablation of the prostate for patients with clinically localized prostate cancer that have failed radiotherapy to the prostate is reviewed with reference to alternatives including salvage radical prostatectomy and brachytherapy. The diagnosis and work-up of local recurrence/persistence of cancer...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章,评审

    doi:10.1177/153303460500400210

    authors: Chin JL,Touma N

    更新日期:2005-04-01 00:00:00

  • Adenovirus-mediated ING4 Gene Transfer in Osteosarcoma Suppresses Tumor Growth via Induction of Apoptosis and Inhibition of Tumor Angiogenesis.

    abstract::The inhibitor of growth (ING) family proteins have been defined as candidate tumor suppressors. ING4 as a novel member of ING family has potential tumor-suppressive effects via multiple pathways. However, the therapeutic effect of adenovirus-mediated ING4 (Ad-ING4) gene transfer in human osteosarcoma is still unknown....

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.7785/tcrt.2012.500424

    authors: Xu M,Xie Y,Sheng W,Miao J,Yang J

    更新日期:2015-10-01 00:00:00

  • The Prognostic Landscape of Tumor-Infiltrating Immune Cells and Immune Checkpoints in Glioblastoma.

    abstract::Tumor-infiltrating immune cells are part of a complex microenvironment and associated with improved clinical outcomes in a broad range of tumor types. However, a detailed map for the prognostic landscape of tumor-infiltrating immune cells and immune checkpoint modulators in glioblastoma is still lacking. Here, with th...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033819869949

    authors: Wu S,Yang W,Zhang H,Ren Y,Fang Z,Yuan C,Yao Z

    更新日期:2019-01-01 00:00:00

  • Safety and Long-Term Effect Assessment of Neoadjuvant Chemoradiotherapy for Elderly Patients With Locally Advanced Rectal Cancer: A CHN Single-Center Retrospective Study.

    abstract:INTRODUCTION:Neoadjuvant chemoradiotherapy (nCRT) followed by operation has become the standard treatment for locally advanced rectal cancer (LARC). However, considering the possible toxicity and complications of radiochemotherapy, nCRT is seldom used for the elderly. The purpose of this study was to assess the safety ...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820970339

    authors: Liu H,Li C,Zhao Z,Guan X,Yang M,Liu Z,Tang Y,Jiang Z,Wang X

    更新日期:2020-01-01 00:00:00

  • Circulating Tumor Cells and Fibronectin 1 in the Prognosis of Nasopharyngeal Carcinoma.

    abstract:OBJECTIVE:Nasopharyngeal carcinoma is highly endemic in Southeast China. Circulating tumor cell is an important biomarker in the prognosis of variety kinds of cancers. Overexpression of fibronectin 1 was observed in variety kinds of malignancies and may contribute to progress and metastasis of the cancers. The current ...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033820909911

    authors: Yu Y,Lin ZX,Li HW,Luo HQ,Yang DH,Zhou HC,Jiang DX,Zhan DC,Yang L,Liang XY,Yu ZH,Chen ZH

    更新日期:2020-01-01 00:00:00

  • Preliminary evaluation of a combined microPET-MR system.

    abstract::There are many motivations for adding simultaneously acquired MR images to PET scanning. The most straight forward are, superior registration of MR and PET images, the addition of morphological detail when there is non-rigid motion and for pre-clinical studies simultaneous imaging could lead to a significant reduction...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/153303461000900106

    authors: Hawkes RC,Fryer TD,Siegel S,Ansorge RE,Carpenter TA

    更新日期:2010-02-01 00:00:00

  • Characterization of Cell Membrane Permeability In Vitro Part I: Transport Behavior Induced by Single-Pulse Electric Fields.

    abstract::Most experimental studies of electroporation focus on permeabilization of the outer cell membrane. Some experiments address delivery of ions and molecules into cells that should survive; others focus on efficient killing of the cells with minimal temperature rise. A basic method for quantifying electroporation effecti...

    journal_title:Technology in cancer research & treatment

    pub_type: 杂志文章

    doi:10.1177/1533033818792491

    authors: Sweeney DC,Weaver JC,Davalos RV

    更新日期:2018-01-01 00:00:00