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Siva S, Kirby K, Caine H, Pham D, Kron T, Te Marvelde L, Whalley D, Stevens MJ, Foroudi F, MacManus M, Ball D, Eade T. Comparison of Single-fraction and Multi-fraction Stereotactic Radiotherapy for Patients with 18F-fluorodeoxyglucose Positron Emission Tomography-staged Pulmonary Oligometastases. Clin Oncol (R Coll Radiol) 2015; 27:353-61. [PMID: 25698068 DOI: 10.1016/j.clon.2015.01.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 11/17/2014] [Accepted: 11/24/2014] [Indexed: 01/12/2023]
Abstract
AIM To compare outcomes of single-fraction and multi-fraction stereotactic ablative body radiotherapy (SABR) for pulmonary metastases. MATERIALS AND METHODS A retrospective review from two academic institutions of patients with one to three pulmonary metastases staged with (18)F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) scans. For single-fraction SABR, 26 Gy was prescribed for peripheral targets and 18 Gy for central targets. In the multi-fraction cohort, 48 Gy/4 or 50 Gy/5 was prescribed for peripheral targets and 50 Gy/5 was prescribed for central targets. Three-dimensional conformal radiotherapy (3D-CRT), intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT) plans were delivered using heterogeneity corrections. Conformity indices at an intermediate dose (R50%) and at a high dose (R100%) were used to assess a relationship with the planning target volume (PTV). Overall survival, local and distant progression and toxicity rates were analysed from the date of treatment completion. RESULTS Between February 2010 and June 2013, 65 patients with 85 pulmonary metastases were reviewed. The median follow-up was 2.1 years. Metastases most commonly originated from colorectal cancer (31%), followed by non-small cell lung cancer (25%). 3D-CRT was used in 52 targets, IMRT in 21 and VMAT in 12. 3D-CRT showed a lower median R50% (P=0.01), but a higher median R100% than IMRT/VMAT (P=0.04). The R50% index was inversely correlated to the PTV with all techniques (P=0.01). Overall survival at 1 and 2 years in all patients was 93% (95% confidence interval 87-100%) and 71% (95% confidence interval 58-86%), respectively. The 2 year freedom from local and distant progression was 93% (95% confidence interval 86-100%) and 38% (95% confidence interval 27-55%), respectively. There were no significant differences between overall survival (P=0 .14), time to distant progression (P=0.06) or toxicity rates (P=0.75) between single- and multi-fraction cohorts. CONCLUSION We report comparable local control, overall survival and toxicity rates between single-fraction and multi-fraction SABR treatments in patients with FDG-PET-staged pulmonary oligometastases. We propose a guideline for R50% conformity incorporating 3D-CRT/IMRT/VMAT techniques with heterogeneity corrected planning algorithms.
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Thannhäuser C, Palka K, Herbst H, Schroeter J, Pham D. Mikrokeratom- und Excimer-Laser-gestützte endotheliale Keratoplastik (MELEK). Klin Monbl Augenheilkd 2014; 231:1008-11. [DOI: 10.1055/s-0034-1383094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Karioris E, Wirbelauer C, Häberle H, Pham D. Die gedeckte Sklerotomie mit primärer Mitomycin-C-Applikation. Klin Monbl Augenheilkd 2014; 231:1012-5. [DOI: 10.1055/s-0034-1383137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Siva S, Devereux T, Hardcastle N, Callahan J, Pham D, Eu P, Steinfort D, Bressel M, MacManus M, Kron T, Hicks R, Ball D, Hofman M. Feasibility of IMRT Planning to Reduce Dose to Functional Lung Using Respiratory Gated (4D) Gallium-68 Perfusion PET/CT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pham D, Kron T, Foroudi F, Schneider M, Siva S. A Review of Kidney Motion under Free, Deep and Forced-Shallow Breathing Conditions: Implications for Stereotactic Ablative Body Radiotherapy Treatment. Technol Cancer Res Treat 2014; 13:315-23. [DOI: 10.7785/tcrt.2012.500387] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Motion management strategies are important during stereotactic ablative body radiotherapy for abdominal targets. The kidney is a mobile retroperitoneal organ that moves with respiration. A review of the literature was performed to investigate the reported degree of kidney motion associated with various breathing conditions. A structured search was performed using Medline from January 1970 to May 2013 for all publications describing cranial-caudal kidney motion. Relevance to radiotherapy practice was reviewed based on any breathing instructions and/or immobilization equipment that could affect breathing pattern. Studies were categorized under three types of breathing conditions: Forced-shallow, breath-hold/deep and free. A total of 25 publications were identified describing cranial-caudal kidney motion with a combined total of 415 participants. Three publications described forced-shallow breathing using prone positioning or abdominal compression plates. Prone positioning, compared to supine positioning, did little to minimise kidney motion, however use of compression plates can result in kidney motion of less than 5 mm. Eight publications described deep breathing/breath hold techniques that showed average kidney motion ranging between 10 mm-40 mm. Fifteen publications investigated kidney motion under free breathing with the majority reporting mean motion of less than 10 mm. Kidney movement of up to 8.1 mm in the anterior posterior direction and 6.2 mm laterally were reported with no indications that breathing technique can influence the extent of this motion. In summary, kidney movement is complex and consideration should be made to ensure that motion management strategies provide the desired radiotherapy benefit. There are limited publications on the effectiveness of abdominal compression on reducing kidney motion which warrant further investigation in this area.
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Foroudi F, Pham D, Bressel M, Hardcastle N, Gill S, Kron T. Comparison of Margins, Integral Dose and Interfraction Target Coverage with Image-guided Radiotherapy Compared with Non-image-guided Radiotherapy for Bladder Cancer. Clin Oncol (R Coll Radiol) 2014; 26:497-505. [DOI: 10.1016/j.clon.2014.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 02/12/2014] [Accepted: 02/25/2014] [Indexed: 11/15/2022]
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Suárez C, Antonarakis GS, Pham D. Occlusal characteristics in subjects with or without the ability to roll the tongue. EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY 2014; 15:147-150. [PMID: 25102465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The tongue represents an important intraoral muscular force which is in direct contact with the dental arches. The objective of the current study was to compare occlusal characteristics of patients who have the ability to roll their tongue (TR+) to those who cannot (TR-). MATERIALS AND METHODS A hundred consecutive patients under orthodontic treatment were classified as TR+ (n=73) or TR- (n=27). Pre-treatment orthodontic study casts were used to measure intercanine and intermolar widths, arch lengths, space deficiency, overjet, overbite, presence or absence of posterior crossbite and the molar Angle class. For continuous variables, independent sample t-tests and Mann-Whitney U tests were used to examine differences between the groups. For dichotomous variables, chi-square tests were used to examine differences between groups. RESULTS TR+ patients showed larger mandibular inter-molar widths (1 mm, p<0.05) and less mandibular space deficiency (1.9 mm, p<0.05) than TR- patients. Mandibular space deficiency was present in the mandibular arch in 18.5% of TR+ compared to 49.3% in TR- patients (p<0.05). CONCLUSION The ability to roll the tongue may lead to differences in occlusal characteristics, namely an increase in mandibular intermolar width and a less mandibular space deficiency.
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Paruchuri V, Shah N, Dow S, Salehi H, Aghili N, Daly G, Pandian N, Karas R, Pham D, Kapur N. Comparative Study of Left Ventricular Mechanics during Percutaneously-Delivered Circulatory Support in a Preclinical Model of Acute Left Heart Injury. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Dowling J, Dang K, Fox CD, Chandra S, Gill S, Kron T, Pham D, Foroudi F. Fast cine-magnetic resonance imaging point tracking for prostate cancer radiation therapy planning. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/489/1/012027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pham D, Thompson A, Kron T, Devereux T, Shaw M, Dang K, Gill S, Foroudi F, Siva S. EP-1400: Stereotactic radiotherapy for primary renal cell carcinoma: Technique and early toxicity in a single institution. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31518-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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McGee L, Hoppe B, Klassen C, Morris C, Flampouri S, Bajwa A, Pham D, D'Agostino H, Li Z, Nichols R. Pulmonary Toxicity Following Proton Therapy for Patients With Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Feng X, Dong K, Pham D, Pence S, Inciardi J, Bhutada NS. Efficacy and cost of single-dose rasburicase in prevention and treatment of adult tumour lysis syndrome: a meta-analysis. J Clin Pharm Ther 2013; 38:301-8. [DOI: 10.1111/jcpt.12061] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 03/04/2013] [Indexed: 12/22/2022]
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Taylor ML, Yeo UJ, Kron T, Supple J, Siva S, Pham D, Franich RD. Comment on “It is not appropriate to ‘deform’ dose along with deformable image registration in adaptive radiotherapy” [Med. Phys. 39, 6531-6533 (2012)]. Med Phys 2013; 40:017101. [PMID: 23298128 DOI: 10.1118/1.4771962] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Pham D, Ansquer D, Chevalier A, Peyramale A, Dauga C, Wabete N, Labreuche Y. Selection study of potential probiotic bacteria for shrimp hatcheries in New Caledonia. COMMUNICATIONS IN AGRICULTURAL AND APPLIED BIOLOGICAL SCIENCES 2013; 78:362-363. [PMID: 25141712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Foroudi F, Pham D, Bressel M, Wong J, Rolfo A, Roxby P, Kron T. Bladder Cancer Radiotherapy Margins: A Comparison of Daily Alignment using Skin, Bone or Soft Tissue. Clin Oncol (R Coll Radiol) 2012; 24:673-81. [DOI: 10.1016/j.clon.2012.06.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 04/04/2012] [Accepted: 06/27/2012] [Indexed: 11/30/2022]
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Mijnarends DM, Pham D, Swaans K, Van Brakel WH, Wright EP. Sustainability Criteria for CBR Programmes – Two Case Studies of
Provincial Programmes in Vietnam. ACTA ACUST UNITED AC 2011. [DOI: 10.5463/dcid.v22i2.54] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fehm TN, Hartkopf AD, Pham D, Scheible V, Lengerke C, Perner S, Rothmund R, Neubauer H, Staebler A. Expression des embryonalen Stammzell-Faktors SOX2 in serösen Ovarialkarzinomen. Geburtshilfe Frauenheilkd 2011. [DOI: 10.1055/s-0031-1286460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Fehm TN, Pham D, Scheible V, Lengerke C, Perner S, Neubauer H, Staebler A. Expression of embryonic stem cell factor Sox2 in serous ovarian carcinomas. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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King JD, Makowski MA, Holcomb CT, Allen SL, Geer R, Meyer WH, Hill DN, Pham D, Morse EC. A digital lock-in upgrade of the motional Stark effect diagnostic on DIII-D. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:10D739. [PMID: 21033930 DOI: 10.1063/1.3496989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The use of lock-in amplifiers for phase sensitive detection of motional Stark effect (MSE) diagnostic signals is of critical importance to real-time internal current profile measurements in tokamak plasmas. A digital lock-in (DLI) upgrade utilizing field programable gate array firmware has been installed on the MSE system of the DIII-D tokamak for the eventual replacement of largely obsolete analog units. While the new digital system has shown a small reduction in electronic noise over the analog, the main advantages are reduced cost, hardware simplicity, compact size, and phase tracking during plasma operations. DLI recovery of MSE polarization angles was accomplished through use of reference processing to produce only photoelastic modulator (PEM) second harmonic frequencies and electronic signal processing to maximize the fidelity of the recovered signal. A simplified discrete analytical solution was found that accurately describes the new DLI hardware. The DLI algorithm was found to cause a prohibitively large oscillating artifact atop the demodulated signal. The artifact was caused by the accumulator interval not containing an exact integer number of PEM multiplier periods. Successful MSE measurements require the minimization of this oscillating artifact amplitude. The analytical solution was used to select an appropriate accumulator interval that both reduces the artifact and maintains the greatest temporal resolution possible. Sample EFIT equilibria reconstructions and corresponding safety factor profiles showed very close agreement between the analog and digital lock-ins.
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Sislian P, Rau J, Zhang X, Pham D, Li M, Mädler L, Christofides P. Bacterial aerosol neutralization by aerodynamic shocks using an impactor system: Experimental results for B. atropheus spores. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.05.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Laugel V, Dalloz C, Durand M, Sauvanaud F, Kristensen U, Vincent MC, Pasquier L, Odent S, Cormier-Daire V, Gener B, Tobias ES, Tolmie JL, Martin-Coignard D, Drouin-Garraud V, Heron D, Journel H, Raffo E, Vigneron J, Lyonnet S, Murday V, Gubser-Mercati D, Funalot B, Brueton L, Sanchez Del Pozo J, Muñoz E, Gennery AR, Salih M, Noruzinia M, Prescott K, Ramos L, Stark Z, Fieggen K, Chabrol B, Sarda P, Edery P, Bloch-Zupan A, Fawcett H, Pham D, Egly JM, Lehmann AR, Sarasin A, Dollfus H. Mutation update for the CSB/ERCC6 and CSA/ERCC8 genes involved in Cockayne syndrome. Hum Mutat 2010; 31:113-26. [PMID: 19894250 DOI: 10.1002/humu.21154] [Citation(s) in RCA: 163] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cockayne syndrome is an autosomal recessive multisystem disorder characterized principally by neurological and sensory impairment, cachectic dwarfism, and photosensitivity. This rare disease is linked to mutations in the CSB/ERCC6 and CSA/ERCC8 genes encoding proteins involved in the transcription-coupled DNA repair pathway. The clinical spectrum of Cockayne syndrome encompasses a wide range of severity from severe prenatal forms to mild and late-onset presentations. We have reviewed the 45 published mutations in CSA and CSB to date and we report 43 new mutations in these genes together with the corresponding clinical data. Among the 84 reported kindreds, 52 (62%) have mutations in the CSB gene. Many types of mutations are scattered along the whole coding sequence of both genes, but clusters of missense mutations can be recognized and highlight the role of particular motifs in the proteins. Genotype-phenotype correlation hypotheses are considered with regard to these new molecular and clinical data. Additional cases of molecular prenatal diagnosis are reported and the strategy for prenatal testing is discussed. Two web-based locus-specific databases have been created to list all identified variants and to allow the inclusion of future reports (www.umd.be/CSA/ and www.umd.be/CSB/).
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Sislian P, Pham D, Zhang X, Li M, Mädler L, Christofides P. Bacterial aerosol neutralization by aerodynamic shocks using an impactor system: Experimental results for E. coli and analysis. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2009.10.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kannengiesser C, Brookes S, del Arroyo AG, Pham D, Bombled J, Barrois M, Mauffret O, Avril MFM, Chompret A, Lenoir GM, Sarasin A, Peters G, Bressac-de Paillerets B. Functional, structural, and genetic evaluation of 20 CDKN2A germ line mutations identified in melanoma-prone families or patients. Hum Mutat 2009; 30:564-74. [PMID: 19260062 DOI: 10.1002/humu.20845] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Germline mutations of the CDKN2A gene are found in melanoma-prone families and individuals with multiple sporadic melanomas. The encoded protein, p16(INK4A), comprises four ankyrin-type repeats, and the mutations, most of which are missense and occur throughout the entire coding region, can disrupt the conformation of these structural motifs as well as the association of p16(INK4a) with its physiological targets, the cyclin-dependent kinases (CDKs) CDK4 and CDK6. Assessing pathogenicity of nonsynonymous mutations is critical to evaluate melanoma risk in carriers. In the current study, we investigate 20 CDKN2A germline mutations whose effects on p16(INK4A) structure and function have not been previously documented (Thr18_Ala19dup, Gly23Asp, Arg24Gln, Gly35Ala, Gly35Val, Ala57Val, Ala60Val, Ala60Arg, Leu65dup, Gly67Arg, Gly67_Asn71del, Glu69Gly, Asp74Tyr, Thr77Pro, Arg80Pro, Pro81Thr, Arg87Trp, Leu97Arg, Arg99Pro, and [Leu113Leu;Pro114Ser]). By considering genetic information, the predicted impact of each variant on the protein structure, its ability to interact with CDK4 and impede cell proliferation in experimental settings, we conclude that 18 of the 20 CDKN2A variants can be classed as loss of function mutations, whereas the results for two remain ambiguous. Discriminating between mutant and neutral variants of p16(INK4A) not only adds to our understanding of the functionally critical residues in the protein but provides information that can be used for melanoma risk prediction.
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Sislian P, Zhang X, Li M, Pham D, Mädler L, Christofides P. Bacterial aerosol neutralization by aerodynamic shocks using a novel impactor system: Design and computation. Chem Eng Sci 2009. [DOI: 10.1016/j.ces.2009.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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