Abstract:
PURPOSE:An analytical and experimental study of split shape dose calculation correction by adjusting the position of the on-axis round leaf end position is presented. We use on-axis corrected results to predict off-axis penumbra region dosimetric performance in an intensity-modulated radiation therapy treatment planning system. MATERIALS AND METHODS:The precise light-field edge position (X(tang.p)) was derived from the on-axis 50% dose position created by using the nominal light field for geometric and mathematical manipulation. Leaf position (X(mlc.p)) could be derived from X(tang.p) by defining in the treatment planning system for monitor unit calculation. On-axis offset (correction) could be obtained from the position corresponding to 50% of the central axis dose minus the X(mlc.p) position. The off-axis 50% dose position can then be derived from the on-axis 50% dose position. RESULTS:The monitor unit calculation of the split shape using the on-axis rounded leaf end MLC penumbra region could provide an under-or overdose of 7.5% per millimeter without an offset correction. When using the on-axis rounded leaf end offset correction to predict the off-axis dose, the difference between the off- and on-axis 50% dose position is within ±1.5 mm. CONCLUSIONS:It is possible to achieve a dose calculation within 0.5% error for an adjusted MLC leaf edge location in the treatment planning system with careful measurement and an accurate on-axis offset correction. Dose calculations located at an off-axis spilt shape region should be used carefully due to noncorrectable errors which were found to be up to 10%.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Wu JM,Lee TF,Yeh SA,Hsiao KY,Chen HH,Chao PJ,Chen YTdoi
10.1155/2013/461801subject
Has Abstractpub_date
2013-01-01 00:00:00pages
461801eissn
2314-6133issn
2314-6141journal_volume
2013pub_type
杂志文章abstract:BACKGROUND:To investigate the anesthetic management in premature infants with retinopathy of prematurity (ROP) treated with intravitreal bevacizumab (IVB) injections. METHODS:A retrospective chart review was performed for the patients with ROP who had IVB injection. Clinical characteristics, demographic variables, ane...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/435387
更新日期:2013-01-01 00:00:00
abstract::It is widely reported that miR-381 is dysregulated in various tumors. However, the specific role of miR-381 in respiratory infections has not been reported. To probe this role, A549 cells were pretreated with 1 μg/mL LPS for 24 h. The level of miR-381 was detected using RT-qPCR. The expression of proinflammatory cytok...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/849475
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to find out the ideal cut-off level of phosphate for safe healing when deformity correction and concomitant lengthening are indicated in the two different skeletal maturity groups of patients with rickets. Thirty-nine hypophosphatemic rickets patients were selected for the study and were divi...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/569530
更新日期:2014-01-01 00:00:00
abstract::Dental modeling resins have been developed for use in areas where highly precise resin structures are needed. The manufacturers claim that these polymethyl methacrylate/methyl methacrylate (PMMA/MMA) resins show little or no shrinkage after polymerization. This study examined the polymerization shrinkage of five denta...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/914739
更新日期:2014-01-01 00:00:00
abstract::28 new pyrrolidine types of compounds as analogues for natural polyhydroxy alkaloids of codonopsinine were evaluated for their anti-MRSA activity using MIC and MBC value determination assay against a panel of S. aureus isolates. One pyrrolidine compound, MFM 501, exhibited good inhibitory activity with MIC value of 15...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/823829
更新日期:2015-01-01 00:00:00
abstract::Restriction enzymes are the main defence system against foreign DNA, in charge of preserving genome integrity. Lactococcus raffinolactis BGTRK10-1 expresses LraI Type II restriction-modification enzyme, whose activity is similar to that shown for EcoRI; LraI methyltransferase protects DNA from EcoRI cleavage. The gene...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/5657085
更新日期:2018-01-29 00:00:00
abstract::Herein the extraction method of fucoidan from Laminaria japonica is reported. Firstly, chitosan, chitosan-N-2-hydroxypropyl trimethyl ammonium chloride (HACC), and hexadecyltrimethylammonium bromide (CPAB) were used to extract the fucoidan. The results showed that chitosan was the optimal extractant compared with the ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/193689
更新日期:2013-01-01 00:00:00
abstract::Background. Acute graft-versus-host disease (aGVHD) involving skin is one of the most frequent complications of allogeneic hematopoietic stem cell transplantation (alloHSCT), usually diagnosed based on clinical manifestations. So far, skin biopsy with histopathological evaluation is the only method to confirm the diag...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2016/4535717
更新日期:2016-01-01 00:00:00
abstract::Tankyrase (TNKS) plays important roles in the malignancy of several cancers such as human lung tumor, breast cancer, and hepatocellular cancer. However, its exact functions and molecular mechanisms in ovarian cancer remain unclear. In this study, we found that TNKS was aberrantly overexpressed in human ovarian cancer ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/2686340
更新日期:2019-02-20 00:00:00
abstract:Background:MicroRNAs have recently been verified as useful diagnostic biomarkers in various diseases. In this study, we investigated whether miR-217 is a useful diagnostic biomarker and the possible pathological mechanism of miR-217 in this disease. Methods:Patients with focal segmental glomerulosclerosis (FSGS), memb...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/2168767
更新日期:2017-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/9234672
更新日期:2017-01-01 00:00:00
abstract::Chromosome/DNA instability could be one of the primary causes of malignant cell transformation. The objective of the present study was to evaluate the spontaneous genetic damages in exfoliated cells of buccal mucosa of head and neck cancer (HNC) by counting micronucleus (MN) and binucleated (BN) cells frequencies. MN ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/905252
更新日期:2013-01-01 00:00:00
abstract::Chlamydophila psittaci (C. psittaci) is a human zoonotic pathogen, which could result in severe respiratory disease. In the present study, we investigated the role and mechanism of the type III secretion system (T3SS) of C. psittaci in regulating the inflammatory response in host cells. C. psittaci-infected THP-1 cell...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/652416
更新日期:2015-01-01 00:00:00
abstract::The increasing insect resistance against Bacillus thuringiensis delta-endotoxins is a serious problem which makes it urgent to look for new eco-friendly strategies. Combining these toxins with other biomolecules is one of the promising strategies against insect pests. In this work, we evaluated the bioinsecticidal pot...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/3895834
更新日期:2018-08-08 00:00:00
abstract::Primary ciliary dyskinesia (PCD) is a clinical rare peculiar disorder, mainly featured by respiratory infection, tympanitis, nasosinusitis, and male infertility. Previous study demonstrated it is an autosomal recessive disease and by 2017 almost 40 pathologic genes have been identified. Among them are the leucine-rich...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/1854269
更新日期:2018-01-08 00:00:00
abstract::The insula is believed to be associated with touch-evoked effects. In this work, functional MRI was applied to investigate the network model of insula function when 20 normal subjects received tactile stimulation over segregated areas. Data analysis was performed with SPM8 and Conn toolbox. Activations in the contrala...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/734326
更新日期:2013-01-01 00:00:00
abstract::Over the last years, a number of therapeutic strategies have emerged to promote axonal regeneration. An attractive strategy is the implantation of biodegradable and nonimmunogenic artificial scaffolds into injured peripheral nerves. In previous studies, transplantation of decellularized veins filled with spider silk f...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/906819
更新日期:2014-01-01 00:00:00
abstract::Condyloma acuminatum, intraepithelial neoplasia, and squamous cell carcinoma are three relatively frequent vulvar lesions. Condyloma acuminatum is induced by low risk genotypes of human papillomavirus (HPV). Vulvar intraepithelial neoplasia (VIN) and squamous cell carcinoma have different etiopathogenic pathways and a...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/480573
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:The aims of this study were to evaluate the complications that occur after trauma and the characteristics of individuals who develop complications, to identify potential risk factors that increase their incidence, and finally to investigate the relationship between complications and mortality. METHODS:We di...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/473419
更新日期:2014-01-01 00:00:00
abstract:PURPOSE:Suppressor of cytokine signaling 7 (SOCS7) is a member of the SOCS family and is known to interact with phospholipase Cγ-1 (PLCγ-1), a key downstream mediator of the hepatocyte growth factor (HGF)/C-MET axis. Here, we report our observations of the effect of knocking down SOCS7 gene on the behaviour of breast c...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/648040
更新日期:2014-01-01 00:00:00
abstract:PURPOSE:Fusarium, Aspergillus, and Dematiaceous are the most common fungal species causing keratitis in tropical countries. Herein we report a prospective study on fungal keratitis caused by these three fungal species. METHODOLOGY:A prospective investigation was undertaken to evaluate eyes with presumed fungal keratit...
journal_title:BioMed research international
pub_type: 临床试验,杂志文章
doi:10.1155/2013/605308
更新日期:2013-01-01 00:00:00
abstract::The purpose of this study was to offer a new insight into the microstructure changes during in vitro lipolysis of five lipid-based drug delivery formulations belonging to different lipid formulation types. Five lipid-based formulations of indomethacin were investigated using an in vitro lipolysis model. During lipolys...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2016/2364317
更新日期:2016-01-01 00:00:00
abstract:Objective:To explore multiscale integrated analysis methods in identifying key regulators of esophageal cancer (ESCA). Methods:We downloaded the ESCA dataset from The Cancer Genome Atlas (TCGA) database, which contained RNA-seq data, miRNA-seq data, methylation data, and clinical phenotype information. Then, we combin...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/5603958
更新日期:2020-08-12 00:00:00
abstract::Ischemia-reperfusion injury (IRI) is a major contributor to acute kidney injury (AKI). At present, there are no effective therapies to prevent AKI. The aim of this study was to analyse whether valproic acid (VPA), a histone deacetylase inhibitor with anti-inflammatory properties, prevents renal IRI. Male Wistar rats w...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2016/5985903
更新日期:2016-01-01 00:00:00
abstract::Body weight supported locomotor training uses neuroplasticity principles to improve recovery following a spinal cord injury (SCI). Steady state locomotion using the same body weight support (BWS) percent was compared in 7 males (42.6 ± 4.29 years) with incomplete SCI and matched (gender, age) noninjured controls (42.7...
journal_title:BioMed research international
pub_type: 杂志文章,随机对照试验
doi:10.1155/2014/632765
更新日期:2014-01-01 00:00:00
abstract::The interaction of patulin with human serum albumin (HSA) was studied in vitro under normal physiological conditions. The study was performed using fluorescence, ultraviolet-visible spectroscopy (UV-Vis), circular dichroism (CD), atomic force microscopy (AFM), and molecular modeling techniques. The quenching mechanism...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/734850
更新日期:2014-01-01 00:00:00
abstract:Background:Waldenström macroglobulinemia (WM) is a rare, indolent B-cell lymphoma. Clinically, chromosome 6q deletion (6q del) including loss of the B lymphocyte-induced maturation protein 1 gene (BLIMP-1) is reported to be associated with poor prognosis. However, it remains unclear how the underlying biological mechan...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/6728128
更新日期:2018-10-04 00:00:00
abstract::Single-sided deafness (SSD) induces cortical neural plastic changes according to duration of deafness. However, it is still unclear how the auditory cortical changes accompany the subcortical neural changes. The present study aimed to find the neural plastic changes in the cortical and subcortical auditory system foll...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/8624745
更新日期:2018-11-26 00:00:00
abstract::Human liver cancer has emerged as a serious health concern in the world, associated with poorly available therapies. The Berberis genus contains vital medicinal plants with miraculous healing properties and a wide range of bioactivities. In this study, different crude extracts of B. lycium Royle were prepared and scre...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/8256809
更新日期:2020-10-14 00:00:00
abstract::The aim of this population-based cohort study was to explore postoperative renal outcomes of patients receiving pyelolithotomy versus percutaneous nephrolithotomy (PCNL). Data were retrieved from the Taiwan National Health Insurance Research Database. During the period from Jan 1, 1998, to Dec 31, 2012, there were 254...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/8582901
更新日期:2018-05-02 00:00:00