151
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Kortekaas J, Dekker A, de Boer SM, Weerdmeester K, Vloet RPM, de Wit AAC, Peeters BPH, Moormann RJM. Intramuscular inoculation of calves with an experimental Newcastle disease virus-based vector vaccine elicits neutralizing antibodies against Rift Valley fever virus. Vaccine 2010; 28:2271-6. [PMID: 20079874 DOI: 10.1016/j.vaccine.2010.01.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Revised: 01/04/2010] [Accepted: 01/06/2010] [Indexed: 12/01/2022]
Abstract
In the past decade, the use of Newcastle disease virus (NDV) as a vaccine vector for the prevention of economically important livestock diseases as well as for human diseases has been extensively explored. In this study, we have constructed a recombinant NDV vaccine virus, named NDFL-Gn, that produces the Rift Valley fever virus (RVFV) Gn glycoprotein. Calves were immunized via either the intranasal route or the intramuscular route. Delivery via the intranasal route elicited no detectable antibody responses, whereas delivery via the intramuscular route elicited antibodies against both NDV and the Gn protein. The RVFV-neutralizing activity of the antisera from intramuscularly vaccinated calves was demonstrated, suggesting that NDV is a promising vaccine vector for the prevention of RVF in calves.
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152
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Janssens G, de Xivry JO, Fekkes S, Dekker A, Macq B, Lambin P, van Elmpt W. Evaluation of nonrigid registration models for interfraction dose accumulation in radiotherapy. Med Phys 2009; 36:4268-76. [PMID: 19810501 DOI: 10.1118/1.3194750] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Interfraction dose accumulation is necessary to evaluate the dose distribution of an entire course of treatment by adding up multiple dose distributions of different treatment fractions. This accumulation of dose distributions is not straightforward as changes in the patient anatomy may occur during treatment. For this purpose, the accuracy of nonrigid registration methods is assessed for dose accumulation based on the calculated deformations fields. METHODS A phantom study using a deformable cubic silicon phantom with implanted markers and a cylindrical silicon phantom with MOSFET detectors has been performed. The phantoms were deformed and images were acquired using a cone-beam CT imager. Dose calculations were performed on these CT scans using the treatment planning system. Nonrigid CT-based registration was performed using two different methods, the Morphons and Demons. The resulting deformation field was applied on the dose distribution. For both phantoms, accuracy of the registered dose distribution was assessed. For the cylindrical phantom, also measured dose values in the deformed conditions were compared with the dose values of the registered dose distributions. Finally, interfraction dose accumulation for two treatment fractions of a patient with primary rectal cancer has been performed and evaluated using isodose lines and the dose volume histograms of the target volume and normal tissue. RESULTS A significant decrease in the difference in marker or MOSFET position was observed after nonrigid registration methods (p < 0.001) for both phantoms and with both methods, as well as a significant decrease in the dose estimation error (p < 0.01 for the cubic phantom and p < 0.001 for the cylindrical) with both methods. Considering the whole data set at once, the difference between estimated and measured doses was also significantly decreased using registration (p < 0.001 for both methods). The patient case showed a slightly underdosed planning target volume and an overdosed bladder volume due to anatomical deformations. CONCLUSIONS Dose accumulation using nonrigid registration methods is possible using repeated CT imaging. This opens possibilities for interfraction dose accumulation and adaptive radiotherapy to incorporate possible differences in dose delivered to the target volume and organs at risk due to anatomical deformations.
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153
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Hatt M, Cheze-Le Rest C, Dekker A, De Ruysscher D, Oellers M, Lambin P, Roux C, Visvikis D. Une nouvelle méthode de détermination automatique des volumes fonctionnels pour les applications de l’imagerie d’émission en oncologie. Ing Rech Biomed 2009. [DOI: 10.1016/j.irbm.2009.05.004] [Citation(s) in RCA: 2] [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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154
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De Ruysscher D, Bosmans G, Öllers M, Wanders S, van Baardwijk A, Reymen B, Borger J, Dekker A, Lambin P. TARGET VOLUME DEFINITION FOR STAGE I NSCLC: SINGLE 4D CT SCAN VS. ONE STANDARD VS. SIX STANDARD CT SCANS. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72641-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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155
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van Elmpt W, Dekker A, Lambin P, De Ruysscher D, Öllers M. THE ADDED VALUE OF 3D PET, 4D PET AND A NEW OPTIMAL GATING ALGORITHM FOR TUMOUR DELINEATION IN NSCLC. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72811-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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156
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Witte M, Petit S, Dekker A, Lambin P, van Herk M. PROBABILISTIC BIOLOGICAL TREATMENT PLANNING FOR NSCLC BASED ON FDG-PET. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)73135-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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157
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Janssens G, de Xivry JO, Fekkes S, Dekker A, Macq B, Lambin P, van Elmpt W. VALIDATION OF INTER-FRACTION DOSE ACCUMULATION USING NON-RIGID REGISTRATION ALGORITHMS. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72655-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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158
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Petit S, van Elmpt W, Lambin P, Dekker A. DOSE CALCULATION USING MV CONE-BEAM CT: CORRECTION OF CUPPING ARTIFACTS, MISSING DATA AND ED CALIBRATION. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72729-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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159
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Nijsten S, Persoon L, Dekker A. INTERCHANGING PATIENTS BETWEEN DIFFERENT TREATMENT MACHINE TYPES WITHOUT REPEATED TREATMENT PLANNING. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72774-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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160
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van Elmpt W, Nijsten S, Petit S, Mijnheer B, Lambin P, Dekker A. 3D In Vivo Dosimetry Using Megavoltage Cone-Beam CT and EPID Dosimetry. Int J Radiat Oncol Biol Phys 2009; 73:1580-7. [DOI: 10.1016/j.ijrobp.2008.11.051] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 11/17/2008] [Accepted: 11/21/2008] [Indexed: 10/21/2022]
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161
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Eblé P, Weerdmeester K, van Hemert-Kluitenberg F, Dekker A. Intradermal vaccination of pigs against FMD with 1/10 dose results in comparable vaccine efficacy as intramuscular vaccination with a full dose. Vaccine 2009; 27:1272-8. [DOI: 10.1016/j.vaccine.2008.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 12/03/2008] [Accepted: 12/09/2008] [Indexed: 10/21/2022]
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162
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Orsel K, Roest HIJ, Elzinga-Bril EM, van Hemert-Kluitenberg F, Dekker A. Detection of foot-and-mouth disease virus in infected pigs by RT-PCR four weeks after challenge. Vet Rec 2008; 162:753-4. [PMID: 18540035 DOI: 10.1136/vr.162.23.753] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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163
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van Baardwijk A, Bosmans G, Bentzen SM, Boersma L, Dekker A, Wanders R, Wouters BG, Lambin P, De Ruysscher D. Radiation Dose Prescription for Non–Small-Cell Lung Cancer According to Normal Tissue Dose Constraints: An In Silico Clinical Trial. Int J Radiat Oncol Biol Phys 2008; 71:1103-10. [PMID: 18258382 DOI: 10.1016/j.ijrobp.2007.11.028] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Revised: 11/15/2007] [Accepted: 11/16/2007] [Indexed: 10/22/2022]
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164
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Lambin P, Dehing C, De Ruysscher D, Dekker A, Persoon L, Yu S, Rao B. TU-D-AUD A-02: Machine Learning Based Clinical Research: The Example of Lung Cancer. Med Phys 2008. [DOI: 10.1118/1.2962571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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165
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Choong NW, Cohen EE, Kozloff MF, Taber D, Wade III JL, Hu S, Ivy SP, Nichols K, Dekker A, Vokes EE. Phase II trial of sunitinib in patients with recurrent and/or metastatic squamous cell carcinoma of the head and neck (SCCHN). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.6064] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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166
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Bosmans G, van Baardwijk A, Dekker A, Öllers M, Wanders S, Boersma L, Lambin P, De Ruysscher D. Time Trends in Nodal Volumes and Motion During Radiotherapy for Patients With Stage III Non-Small-Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2008; 71:139-44. [DOI: 10.1016/j.ijrobp.2007.08.071] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 08/10/2007] [Accepted: 08/31/2007] [Indexed: 12/25/2022]
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167
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van Loon J, Offermann C, Bosmans G, Wanders R, Dekker A, Borger J, Oellers M, Dingemans AM, van Baardwijk A, Teule J, Snoep G, Hochstenbag M, Houben R, Lambin P, De Ruysscher D. 18FDG-PET based radiation planning of mediastinal lymph nodes in limited disease small cell lung cancer changes radiotherapy fields: A planning study. Radiother Oncol 2008; 87:49-54. [PMID: 18342967 DOI: 10.1016/j.radonc.2008.02.019] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 02/12/2008] [Accepted: 02/16/2008] [Indexed: 11/18/2022]
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168
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Piek C, Junius G, Dekker A, Schrauwen E, Slappendel R, Teske E. Idiopathic Immune-Mediated Hemolytic Anemia: Treatment Outcome and Prognostic Factors in 149 Dogs. J Vet Intern Med 2008; 22:366-73. [DOI: 10.1111/j.1939-1676.2008.0060.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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169
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Hamill JJ, Bosmans G, Dekker A. Respiratory-gated CT as a tool for the simulation of breathing artifacts in PET and PET/CT. Med Phys 2008; 35:576-85. [DOI: 10.1118/1.2829875] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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170
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van Elmpt W, Nijsten S, Mijnheer B, Dekker A, Lambin P. The next step in patient-specific QA: 3D dose verification of conformal and intensity-modulated RT based on EPID dosimetry and Monte Carlo dose calculations. Radiother Oncol 2008; 86:86-92. [PMID: 18054102 DOI: 10.1016/j.radonc.2007.11.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2007] [Revised: 11/05/2007] [Accepted: 11/05/2007] [Indexed: 11/16/2022]
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171
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Eblé PL, de Koeijer AA, de Jong MCM, Engel B, Dekker A. A meta-analysis quantifying transmission parameters of FMDV strain O Taiwan among non-vaccinated and vaccinated pigs. Prev Vet Med 2008; 83:98-106. [PMID: 17683815 DOI: 10.1016/j.prevetmed.2007.06.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 06/11/2007] [Accepted: 06/26/2007] [Indexed: 11/23/2022]
Abstract
Our aim was to provide additional estimates of main parameters for the transmission of foot-and-mouth disease virus (FMDV) strain O Taiwan (3/97). We used the data of previous experiments in non-vaccinated and vaccinated pigs and combined the data of experiments with the same treatment(s). First, we quantified the reproduction ratio R for the various groups using a final-size method. Our final-size results predicted that vaccination with a four-fold vaccine dose (but not with a single dose) at 1 week before inoculation (-7 dpi) would reduce R compared to the non-vaccinated group. Secondly, we used the daily results of virus excretion to quantify the transmission rate beta (by using generalized linear modelling), and the infectious period T (by using survival analysis). We used the estimates of beta and T to estimate R more precisely as compared to the final-size method and also for the groups for which a finite estimate could not be obtained using a final-size method. Our modelling results predicted that beta for non-vaccinated, for single-dose and four-fold-dose groups would be 6.1 (3.7, 10)day(-1), 2.0 (1.0, 4.0)day(-1) and 0.4 (0.1, 1.4)day(-1), T at 6.5 (5.7, 7.3), 5.3 (4.7, 6.0) and 2.3 (0.9, 5.7) days and R at 40 (21, 74), 11 (4.9, 24) and 1.0 (0.1, 7.8), respectively. These results predicted that both vaccination with a four-fold vaccine dose and with a single dose at -7 dpi would reduce beta, T and R significantly as compared to the non-vaccinated pigs, thereby showing that vaccination will reduce transmission of FMDV significantly already 1 week post vaccination.
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172
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van Elmpt W, Nijsten S, Mijnheer B, Dekker A, Lambin P. The Next Step in Patient Specific QA: 3D Dose Verification for Conformal and Intensity Modulated RT Based on EPID Dosimetry and Monte Carlo Calculations. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.2030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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173
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Orban de Xivry J, Janssens G, Bosmans G, De Craene M, Dekker A, Buijsen J, van Baardwijk A, De Ruysscher D, Macq B, Lambin P. Tumour delineation and cumulative dose computation in radiotherapy based on deformable registration of respiratory correlated CT images of lung cancer patients. Radiother Oncol 2007; 85:232-8. [PMID: 17936388 DOI: 10.1016/j.radonc.2007.08.012] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 08/29/2007] [Accepted: 08/31/2007] [Indexed: 12/25/2022]
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174
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Reesink K, Dekker A, Van der Nagel T, Beghi C, Leonardi F, Botti P, De Cicco G, Lorusso R, Van der Veen F, Maessen J. Suction due to left ventricular assist: implications for device control and management. Artif Organs 2007; 31:542-9. [PMID: 17584479 DOI: 10.1111/j.1525-1594.2007.00420.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Left ventricular assist device (LVAD) overpumping is associated with hemolysis, thrombus release, and tissue damage at the pump inlet. However, the impact of LVAD suction on pulmonary circulatory function remains unknown. We investigated LVAD suction as induced by pulmonary artery banding and overpumping in experimental animals and in a computer model. In six sheep, a rotary LVAD was implanted. Before inducing suction, partial support (40-60% of cardiac output) was established and characterized by measuring pressures and flows. In the animals, pulmonary artery occlusion (PAOC) elicited LVAD suction (left ventricular pressure was from -10 to -20 mm Hg) within 5-10 heartbeats. During suction, aortic pressure dropped to 50% and LVAD flow decreased significantly. After releasing the occlusion (20 s), the collapsed state persisted for another 20 s. A similar trend was obtained by simulating PAOC in the computer model. Additional simulations showed that pulmonary vascular resistance (PVR), volume status, and right ventricular (RV) contractility are exponentially related to the persistence of collapse after a suction event. Even modest increases in predisposing factors (elevated PVR, RV dysfunction, hypovolemia) caused sustained hemodynamic collapse lasting in excess of 15 min. Both in selected animals and the computer model, comparable suction-induced collapse was obtained by increasing LVAD speed by about 33%. Attempted compensation by simply decreasing speed was not effective, but temporarily shutting down the LVAD caused rapid reversal of collapse. In conclusion, rotary LVAD suction causes unfavorable conditions for effective unloading. The use of pump interventions appears a promising tool to detect suction and to avoid the associated hemodynamic depression.
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175
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van Loon J, De Ruysscher D, Hochstenbag M, Bootsma G, Geraedts W, Pitz C, Simons J, Dekker A, Wanders S, Lambin P. 919 POSTER FDG-PET based planning of limited stage small-cell lung cancer changes radiotherapy fields: a planning study. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70558-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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