1
|
Rabus H, Li WB, Nettelbeck H, Schuemann J, Villagrasa C, Beuve M, Di Maria S, Heide B, Klapproth AP, Poignant F, Qiu R, Rudek B. Consistency checks of results from a Monte Carlo code intercomparison for emitted electron spectra and energy deposition around a single gold nanoparticle irradiated by X-rays. RADIAT MEAS 2021; 147:106637. [PMID: 35669292 PMCID: PMC9165644 DOI: 10.1016/j.radmeas.2021.106637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Organized by the European Radiation Dosimetry Group (EURADOS), a Monte Carlo code intercomparison exercise was conducted where participants simulated the emitted electron spectra and energy deposition around a single gold nanoparticle (GNP) irradiated by X-rays. In the exercise, the participants scored energy imparted in concentric spherical shells around a spherical volume filled with gold or water as well as the spectral distribution of electrons leaving the GNP. Initially, only the ratio of energy deposition with and without GNP was to be reported. During the evaluation of the exercise, however, the data for energy deposition in the presence and absence of the GNP were also requested. A GNP size of 50 nm and 100 nm diameter was considered as well as two different X-ray spectra (50 kVp and 100kVp). This introduced a redundancy that can be used to cross-validate the internal consistency of the simulation results. In this work, evaluation of the reported results is presented in terms of integral quantities that can be benchmarked against values obtained from physical properties of the radiation spectra and materials involved. The impact of different interaction cross-section datasets and their implementation in the different Monte Carlo codes is also discussed.
Collapse
Affiliation(s)
- H Rabus
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - W B Li
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - H Nettelbeck
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - J Schuemann
- Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - C Villagrasa
- Institut de Radioprotection et de Sûreté Nucléaire, Fontenay-Aux-Roses, France
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - M Beuve
- Institut de Physique des 2 Infinis, Université Claude Bernard Lyon 1, Villeurbanne, France
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Bobadela LRS, Portugal
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - B Heide
- Karlsruhe Institute of Technology, Karlsruhe, Germany
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - A P Klapproth
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- TranslaTUM, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - F Poignant
- Institut de Physique des 2 Infinis, Université Claude Bernard Lyon 1, Villeurbanne, France
- Present address: National Institute of Aerospace, Hampton, VA, USA
| | - R Qiu
- Department of Engineering Physics, Tsinghua University, Beijing, China
- European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - B Rudek
- Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA
- Present address: Perlmutter Cancer Center, NYU Langone Health, New York City, NY, USA
| |
Collapse
|
2
|
Li X, Inhester L, Robatjazi SJ, Erk B, Boll R, Hanasaki K, Toyota K, Hao Y, Bomme C, Rudek B, Foucar L, Southworth SH, Lehmann CS, Kraessig B, Marchenko T, Simon M, Ueda K, Ferguson KR, Bucher M, Gorkhover T, Carron S, Alonso-Mori R, Koglin JE, Correa J, Williams GJ, Boutet S, Young L, Bostedt C, Son SK, Santra R, Rolles D, Rudenko A. Pulse Energy and Pulse Duration Effects in the Ionization and Fragmentation of Iodomethane by Ultraintense Hard X Rays. Phys Rev Lett 2021; 127:093202. [PMID: 34506178 DOI: 10.1103/physrevlett.127.093202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 01/24/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
The interaction of intense femtosecond x-ray pulses with molecules sensitively depends on the interplay between multiple photoabsorptions, Auger decay, charge rearrangement, and nuclear motion. Here, we report on a combined experimental and theoretical study of the ionization and fragmentation of iodomethane (CH_{3}I) by ultraintense (∼10^{19} W/cm^{2}) x-ray pulses at 8.3 keV, demonstrating how these dynamics depend on the x-ray pulse energy and duration. We show that the timing of multiple ionization steps leading to a particular reaction product and, thus, the product's final kinetic energy, is determined by the pulse duration rather than the pulse energy or intensity. While the overall degree of ionization is mainly defined by the pulse energy, our measurement reveals that the yield of the fragments with the highest charge states is enhanced for short pulse durations, in contrast to earlier observations for atoms and small molecules in the soft x-ray domain. We attribute this effect to a decreased charge transfer efficiency at larger internuclear separations, which are reached during longer pulses.
Collapse
Affiliation(s)
- X Li
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, USA
| | - L Inhester
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - S J Robatjazi
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, USA
| | - B Erk
- Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - R Boll
- Max Planck Institute for Nuclear Physics, Heidelberg, Germany
- European XFEL, Schenefeld, Germany
| | - K Hanasaki
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - K Toyota
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - Y Hao
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
- Institute of Theoretical Physics and Department of Physics, University of Science and Technology Beijing, Beijing, People's Republic of China
| | - C Bomme
- Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - B Rudek
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
| | - L Foucar
- Max Planck Institute for Medical Research, Heidelberg, Germany
| | - S H Southworth
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - C S Lehmann
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
- Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany
| | - B Kraessig
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - T Marchenko
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, Paris, France
| | - M Simon
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, Paris, France
| | - K Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan
| | - K R Ferguson
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - M Bucher
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - T Gorkhover
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Germany
| | - S Carron
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - R Alonso-Mori
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - J E Koglin
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - J Correa
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - G J Williams
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
- NSLS-II, Brookhaven National Laboratory, Upton New York, USA
| | - S Boutet
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - L Young
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
- Department of Physics and James Franck Institute, The University of Chicago, Chicago, Illinois, USA
| | - C Bostedt
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
- Paul Scherrer Institut, Villigen-PSI, Villigen, Switzerland
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - S-K Son
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - R Santra
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
- Department of Physics, Universität Hamburg, Hamburg, Germany
| | - D Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, USA
- Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - A Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, USA
| |
Collapse
|
3
|
Rabus H, Li WB, Villagrasa C, Schuemann J, Hepperle PA, de la Fuente Rosales L, Beuve M, Di Maria S, Klapproth AP, Li CY, Poignant F, Rudek B, Nettelbeck H. Intercomparison of Monte Carlo calculated dose enhancement ratios for gold nanoparticles irradiated by X-rays: Assessing the uncertainty and correct methodology for extended beams. Phys Med 2021; 84:241-253. [PMID: 33766478 DOI: 10.1016/j.ejmp.2021.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 12/12/2022] Open
Abstract
Results of a Monte Carlo code intercomparison exercise for simulations of the dose enhancement from a gold nanoparticle (GNP) irradiated by X-rays have been recently reported. To highlight potential differences between codes, the dose enhancement ratios (DERs) were shown for the narrow-beam geometry used in the simulations, which leads to values significantly higher than unity over distances in the order of several tens of micrometers from the GNP surface. As it has come to our attention that the figures in our paper have given rise to misinterpretation as showing 'the' DERs of GNPs under diagnostic X-ray irradiation, this article presents estimates of the DERs that would have been obtained with realistic radiation field extensions and presence of secondary particle equilibrium (SPE). These DER values are much smaller than those for a narrow-beam irradiation shown in our paper, and significant dose enhancement is only found within a few hundred nanometers around the GNP. The approach used to obtain these estimates required the development of a methodology to identify and, where possible, correct results from simulations whose implementation deviated from the initial exercise definition. Based on this methodology, literature on Monte Carlo simulated DERs has been critically assessed.
Collapse
Affiliation(s)
- H Rabus
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - W B Li
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - C Villagrasa
- Institut de Radioprotection et de Sûreté Nucléaire, Fontenay-Aux-Roses, France; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - J Schuemann
- Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - P A Hepperle
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany; Leibniz Universität Hannover, Hannover, Germany
| | | | - M Beuve
- Institut de Physique des 2 Infinis, Université Claude Bernard Lyon 1, Villeurbanne, France; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Bobadela LRS, Portugal; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| | - A P Klapproth
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany; TranslaTUM, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - C Y Li
- Department of Engineering Physics, Tsinghua University, Beijing, China; Nuctech Company Limited, Beijing, China
| | - F Poignant
- Institut de Physique des 2 Infinis, Université Claude Bernard Lyon 1, Villeurbanne, France; NASA Langley Research Center, Hampton, VA, USA
| | - B Rudek
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany; Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA; Perlmutter Cancer Center, NYU Langone Health, New York City, NY, USA
| | - H Nettelbeck
- Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany; European Radiation Dosimetry Group (EURADOS) e.V, Neuherberg, Germany
| |
Collapse
|
4
|
Rudek B, Bernstein K, Osterman S, Qu T. Dosimetry of Gamma-Knife Hybrid Shots With Film, Scintillator and the Microdiamond Detector. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Li WB, Belchior A, Beuve M, Chen YZ, Di Maria S, Friedland W, Gervais B, Heide B, Hocine N, Ipatov A, Klapproth AP, Li CY, Li JL, Multhoff G, Poignant F, Qiu R, Rabus H, Rudek B, Schuemann J, Stangl S, Testa E, Villagrasa C, Xie WZ, Zhang YB. Intercomparison of dose enhancement ratio and secondary electron spectra for gold nanoparticles irradiated by X-rays calculated using multiple Monte Carlo simulation codes. Phys Med 2020; 69:147-163. [PMID: 31918367 DOI: 10.1016/j.ejmp.2019.12.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 11/29/2019] [Accepted: 12/15/2019] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Targeted radiation therapy has seen an increased interest in the past decade. In vitro and in vivo experiments showed enhanced radiation doses due to gold nanoparticles (GNPs) to tumors in mice and demonstrated a high potential for clinical application. However, finding a functionalized molecular formulation for actively targeting GNPs in tumor cells is challenging. Furthermore, the enhanced energy deposition by secondary electrons around GNPs, particularly by short-ranged Auger electrons is difficult to measure. Computational models, such as Monte Carlo (MC) radiation transport codes, have been used to estimate the physical quantities and effects of GNPs. However, as these codes differ from one to another, the reliability of physical and dosimetric quantities needs to be established at cellular and molecular levels, so that the subsequent biological effects can be assessed quantitatively. METHODS In this work, irradiation of single GNPs of 50 nm and 100 nm diameter by X-ray spectra generated by 50 and 100 peak kilovoltages was simulated for a defined geometry setup, by applying multiple MC codes in the EURADOS framework. RESULTS The mean dose enhancement ratio of the first 10 nm-thick water shell around a 100 nm GNP ranges from 400 for 100 kVp X-rays to 600 for 50 kVp X-rays with large uncertainty factors up to 2.3. CONCLUSIONS It is concluded that the absolute dose enhancement effects have large uncertainties and need an inter-code intercomparison for a high quality assurance; relative properties may be a better measure until more experimental data is available to constrain the models.
Collapse
Affiliation(s)
- W B Li
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Ingolstädter Landstr. 1, 85764 Neuherberg, Germany.
| | - A Belchior
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
| | - M Beuve
- Institut de Physique Nucléaire de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3 UMR 5822, Villeurbanne, France
| | - Y Z Chen
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
| | - W Friedland
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - B Gervais
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - B Heide
- Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - N Hocine
- Institut de Radioprotection et de Sûreté Nucléaire, Fontenay-Aux-Roses, France
| | - A Ipatov
- Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg, Russia
| | - A P Klapproth
- Institute of Radiation Medicine, Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Ingolstädter Landstr. 1, 85764 Neuherberg, Germany; TranslaTUM, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - C Y Li
- Department of Engineering Physics, Tsinghua University, Beijing, China; Nuctech Company Limited, Beijing, China
| | - J L Li
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - G Multhoff
- TranslaTUM, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - F Poignant
- Institut de Physique Nucléaire de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3 UMR 5822, Villeurbanne, France
| | - R Qiu
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - H Rabus
- Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
| | - B Rudek
- Physikalisch-Technische Bundesanstalt, Braunschweig, Germany; Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA
| | - J Schuemann
- Massachusetts General Hospital & Harvard Medical School, Department of Radiation Oncology, Boston, MA, USA
| | - S Stangl
- TranslaTUM, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - E Testa
- Institut de Physique Nucléaire de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3 UMR 5822, Villeurbanne, France
| | - C Villagrasa
- Institut de Radioprotection et de Sûreté Nucléaire, Fontenay-Aux-Roses, France
| | - W Z Xie
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - Y B Zhang
- Peking University Cancer Hospital, Beijing, China
| |
Collapse
|
6
|
Wolff W, Rudek B, da Silva LA, Hilgers G, Montenegro EC, Homem MGP. Absolute ionization and dissociation cross sections of tetrahydrofuran: Fragmentation-ion production mechanisms. J Chem Phys 2019. [DOI: 10.1063/1.5115403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Affiliation(s)
- W. Wolff
- Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil
| | - B. Rudek
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany
| | - L. A. da Silva
- Departamento de Química, Universidade Federal de São Carlos, 13565-905, São Carlos, SP, Brazil
| | - G. Hilgers
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany
| | - E. C. Montenegro
- Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil
| | - M. G. P. Homem
- Departamento de Química, Universidade Federal de São Carlos, 13565-905, São Carlos, SP, Brazil
| |
Collapse
|
7
|
Stern S, Holmegaard L, Filsinger F, Rouzée A, Rudenko A, Johnsson P, Martin AV, Barty A, Bostedt C, Bozek J, Coffee R, Epp S, Erk B, Foucar L, Hartmann R, Kimmel N, Kühnel KU, Maurer J, Messerschmidt M, Rudek B, Starodub D, Thøgersen J, Weidenspointner G, White TA, Stapelfeldt H, Rolles D, Chapman HN, Küpper J. Toward atomic resolution diffractive imaging of isolated molecules with X-ray free-electron lasers. Faraday Discuss 2015; 171:393-418. [PMID: 25415561 DOI: 10.1039/c4fd00028e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We give a detailed account of the theoretical analysis and the experimental results of an X-ray-diffraction experiment on quantum-state selected and strongly laser-aligned gas-phase ensembles of the prototypical large asymmetric rotor molecule 2,5-diiodobenzonitrile, performed at the Linac Coherent Light Source [Phys. Rev. Lett.112, 083002 (2014)]. This experiment is the first step toward coherent diffractive imaging of structures and structural dynamics of isolated molecules at atomic resolution, i.e., picometers and femtoseconds, using X-ray free-electron lasers.
Collapse
Affiliation(s)
- S Stern
- Center for Free-Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Starodub D, Aquila A, Bajt S, Barthelmess M, Barty A, Bostedt C, Bozek JD, Coppola N, Doak RB, Epp SW, Erk B, Foucar L, Gumprecht L, Hampton CY, Hartmann A, Hartmann R, Holl P, Kassemeyer S, Kimmel N, Laksmono H, Liang M, Loh ND, Lomb L, Martin AV, Nass K, Reich C, Rolles D, Rudek B, Rudenko A, Schulz J, Shoeman RL, Sierra RG, Soltau H, Steinbrener J, Stellato F, Stern S, Weidenspointner G, Frank M, Ullrich J, Strüder L, Schlichting I, Chapman HN, Spence JCH, Bogan MJ. Single-particle structure determination by correlations of snapshot X-ray diffraction patterns. Nat Commun 2013; 3:1276. [PMID: 23232406 DOI: 10.1038/ncomms2288] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 11/14/2012] [Indexed: 11/09/2022] Open
Abstract
Diffractive imaging with free-electron lasers allows structure determination from ensembles of weakly scattering identical nanoparticles. The ultra-short, ultra-bright X-ray pulses provide snapshots of the randomly oriented particles frozen in time, and terminate before the onset of structural damage. As signal strength diminishes for small particles, the synthesis of a three-dimensional diffraction volume requires simultaneous involvement of all data. Here we report the first application of a three-dimensional spatial frequency correlation analysis to carry out this synthesis from noisy single-particle femtosecond X-ray diffraction patterns of nearly identical samples in random and unknown orientations, collected at the Linac Coherent Light Source. Our demonstration uses unsupported test particles created via aerosol self-assembly, and composed of two polystyrene spheres of equal diameter. The correlation analysis avoids the need for orientation determination entirely. This method may be applied to the structural determination of biological macromolecules in solution.
Collapse
Affiliation(s)
- D Starodub
- PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Fukuzawa H, Son SK, Motomura K, Mondal S, Nagaya K, Wada S, Liu XJ, Feifel R, Tachibana T, Ito Y, Kimura M, Sakai T, Matsunami K, Hayashita H, Kajikawa J, Johnsson P, Siano M, Kukk E, Rudek B, Erk B, Foucar L, Robert E, Miron C, Tono K, Inubushi Y, Hatsui T, Yabashi M, Yao M, Santra R, Ueda K. Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses. Phys Rev Lett 2013; 110:173005. [PMID: 23679721 DOI: 10.1103/physrevlett.110.173005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 02/04/2013] [Indexed: 05/11/2023]
Abstract
We have investigated multiphoton multiple ionization dynamics of xenon atoms using a new x-ray free-electron laser facility, SPring-8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that Xe(n+) with n up to 26 is produced at a photon energy of 5.5 keV. The observed high charge states (n≥24) are produced via five-photon absorption, evidencing the occurrence of multiphoton absorption involving deep inner shells. A newly developed theoretical model, which shows good agreement with the experiment, elucidates the complex pathways of sequential electronic decay cascades accessible in heavy atoms. The present study of heavy-atom ionization dynamics in high-intensity hard-x-ray pulses makes a step forward towards molecular structure determination with x-ray free-electron lasers.
Collapse
Affiliation(s)
- H Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Erk B, Rolles D, Foucar L, Rudek B, Epp SW, Cryle M, Bostedt C, Schorb S, Bozek J, Rouzee A, Hundertmark A, Marchenko T, Simon M, Filsinger F, Christensen L, De S, Trippel S, Küpper J, Stapelfeldt H, Wada S, Ueda K, Swiggers M, Messerschmidt M, Schröter CD, Moshammer R, Schlichting I, Ullrich J, Rudenko A. Ultrafast charge rearrangement and nuclear dynamics upon inner-shell multiple ionization of small polyatomic molecules. Phys Rev Lett 2013; 110:053003. [PMID: 23414017 DOI: 10.1088/0953-4075/46/16/164031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Indexed: 05/23/2023]
Abstract
Ionization and fragmentation of methylselenol (CH(3)SeH) molecules by intense (>10(17) W/cm(2)) 5 fs x-ray pulses (ħω=2 keV) are studied by coincident ion momentum spectroscopy. We contrast the measured charge state distribution with data on atomic Kr, determine kinetic energies of resulting ionic fragments, and compare them to the outcome of a Coulomb explosion model. We find signatures of ultrafast charge redistribution from the inner-shell ionized Se atom to its molecular partners, and observe significant displacement of the atomic constituents in the course of multiple ionization.
Collapse
Affiliation(s)
- B Erk
- Max Planck Advanced Study Group (ASG) at CFEL, 22761 Hamburg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Erk B, Rolles D, Foucar L, Rudek B, Epp SW, Cryle M, Bostedt C, Schorb S, Bozek J, Rouzee A, Hundertmark A, Marchenko T, Simon M, Filsinger F, Christensen L, De S, Trippel S, Küpper J, Stapelfeldt H, Wada S, Ueda K, Swiggers M, Messerschmidt M, Schröter CD, Moshammer R, Schlichting I, Ullrich J, Rudenko A. Ultrafast charge rearrangement and nuclear dynamics upon inner-shell multiple ionization of small polyatomic molecules. Phys Rev Lett 2013; 110:053003. [PMID: 23414017 DOI: 10.1103/physrevlett.110.053003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Indexed: 05/11/2023]
Abstract
Ionization and fragmentation of methylselenol (CH(3)SeH) molecules by intense (>10(17) W/cm(2)) 5 fs x-ray pulses (ħω=2 keV) are studied by coincident ion momentum spectroscopy. We contrast the measured charge state distribution with data on atomic Kr, determine kinetic energies of resulting ionic fragments, and compare them to the outcome of a Coulomb explosion model. We find signatures of ultrafast charge redistribution from the inner-shell ionized Se atom to its molecular partners, and observe significant displacement of the atomic constituents in the course of multiple ionization.
Collapse
Affiliation(s)
- B Erk
- Max Planck Advanced Study Group (ASG) at CFEL, 22761 Hamburg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Loh ND, Hampton CY, Martin AV, Starodub D, Sierra RG, Barty A, Aquila A, Schulz J, Lomb L, Steinbrener J, Shoeman RL, Kassemeyer S, Bostedt C, Bozek J, Epp SW, Erk B, Hartmann R, Rolles D, Rudenko A, Rudek B, Foucar L, Kimmel N, Weidenspointner G, Hauser G, Holl P, Pedersoli E, Liang M, Hunter MS, Gumprecht L, Coppola N, Wunderer C, Graafsma H, Maia FRNC, Ekeberg T, Hantke M, Fleckenstein H, Hirsemann H, Nass K, White TA, Tobias HJ, Farquar GR, Benner WH, Hau-Riege SP, Reich C, Hartmann A, Soltau H, Marchesini S, Bajt S, Barthelmess M, Bucksbaum P, Hodgson KO, Strüder L, Ullrich J, Frank M, Schlichting I, Chapman HN, Bogan MJ. Erratum: Fractal morphology, imaging and mass spectrometry of single aerosol particles in flight. Nature 2012. [DOI: 10.1038/nature11426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
13
|
Loh ND, Hampton CY, Martin AV, Starodub D, Sierra RG, Barty A, Aquila A, Schulz J, Lomb L, Steinbrener J, Shoeman RL, Kassemeyer S, Bostedt C, Bozek J, Epp SW, Erk B, Hartmann R, Rolles D, Rudenko A, Rudek B, Foucar L, Kimmel N, Weidenspointner G, Hauser G, Holl P, Pedersoli E, Liang M, Hunter MS, Hunter MM, Gumprecht L, Coppola N, Wunderer C, Graafsma H, Maia FRNC, Ekeberg T, Hantke M, Fleckenstein H, Hirsemann H, Nass K, White TA, Tobias HJ, Farquar GR, Benner WH, Hau-Riege SP, Reich C, Hartmann A, Soltau H, Marchesini S, Bajt S, Barthelmess M, Bucksbaum P, Hodgson KO, Strüder L, Ullrich J, Frank M, Schlichting I, Chapman HN, Bogan MJ. Fractal morphology, imaging and mass spectrometry of single aerosol particles in flight. Nature 2012; 486:513-7. [PMID: 22739316 DOI: 10.1038/nature11222] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 05/09/2012] [Indexed: 11/09/2022]
Abstract
The morphology of micrometre-size particulate matter is of critical importance in fields ranging from toxicology to climate science, yet these properties are surprisingly difficult to measure in the particles' native environment. Electron microscopy requires collection of particles on a substrate; visible light scattering provides insufficient resolution; and X-ray synchrotron studies have been limited to ensembles of particles. Here we demonstrate an in situ method for imaging individual sub-micrometre particles to nanometre resolution in their native environment, using intense, coherent X-ray pulses from the Linac Coherent Light Source free-electron laser. We introduced individual aerosol particles into the pulsed X-ray beam, which is sufficiently intense that diffraction from individual particles can be measured for morphological analysis. At the same time, ion fragments ejected from the beam were analysed using mass spectrometry, to determine the composition of single aerosol particles. Our results show the extent of internal dilation symmetry of individual soot particles subject to non-equilibrium aggregation, and the surprisingly large variability in their fractal dimensions. More broadly, our methods can be extended to resolve both static and dynamic morphology of general ensembles of disordered particles. Such general morphology has implications in topics such as solvent accessibilities in proteins, vibrational energy transfer by the hydrodynamic interaction of amino acids, and large-scale production of nanoscale structures by flame synthesis.
Collapse
Affiliation(s)
- N D Loh
- PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Gorkhover T, Adolph M, Rupp D, Schorb S, Epp SW, Erk B, Foucar L, Hartmann R, Kimmel N, Kühnel KU, Rolles D, Rudek B, Rudenko A, Andritschke R, Aquila A, Bozek JD, Coppola N, Erke T, Filsinger F, Gorke H, Graafsma H, Gumprecht L, Hauser G, Herrmann S, Hirsemann H, Hömke A, Holl P, Kaiser C, Krasniqi F, Meyer JH, Matysek M, Messerschmidt M, Miessner D, Nilsson B, Pietschner D, Potdevin G, Reich C, Schaller G, Schmidt C, Schopper F, Schröter CD, Schulz J, Soltau H, Weidenspointner G, Schlichting I, Strüder L, Ullrich J, Möller T, Bostedt C. Nanoplasma dynamics of single large xenon clusters irradiated with superintense x-ray pulses from the linac coherent light source free-electron laser. Phys Rev Lett 2012; 108:245005. [PMID: 23004284 DOI: 10.1103/physrevlett.108.245005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Indexed: 05/09/2023]
Abstract
The plasma dynamics of single mesoscopic Xe particles irradiated with intense femtosecond x-ray pulses exceeding 10(16) W/cm2 from the Linac Coherent Light Source free-electron laser are investigated. Simultaneous recording of diffraction patterns and ion spectra allows eliminating the influence of the laser focal volume intensity and particle size distribution. The data show that for clusters illuminated with intense x-ray pulses, highly charged ionization fragments in a narrow distribution are created and that the nanoplasma recombination is efficiently suppressed.
Collapse
Affiliation(s)
- T Gorkhover
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Martin AV, Loh ND, Hampton CY, Sierra RG, Wang F, Aquila A, Bajt S, Barthelmess M, Bostedt C, Bozek JD, Coppola N, Epp SW, Erk B, Fleckenstein H, Foucar L, Frank M, Graafsma H, Gumprecht L, Hartmann A, Hartmann R, Hauser G, Hirsemann H, Holl P, Kassemeyer S, Kimmel N, Liang M, Lomb L, Maia FRNC, Marchesini S, Nass K, Pedersoli E, Reich C, Rolles D, Rudek B, Rudenko A, Schulz J, Shoeman RL, Soltau H, Starodub D, Steinbrener J, Stellato F, Strüder L, Ullrich J, Weidenspointner G, White TA, Wunderer CB, Barty A, Schlichting I, Bogan MJ, Chapman HN. Femtosecond dark-field imaging with an X-ray free electron laser. Opt Express 2012; 20:13501-12. [PMID: 22714377 DOI: 10.1364/oe.20.013501] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The emergence of femtosecond diffractive imaging with X-ray lasers has enabled pioneering structural studies of isolated particles, such as viruses, at nanometer length scales. However, the issue of missing low frequency data significantly limits the potential of X-ray lasers to reveal sub-nanometer details of micrometer-sized samples. We have developed a new technique of dark-field coherent diffractive imaging to simultaneously overcome the missing data issue and enable us to harness the unique contrast mechanisms available in dark-field microscopy. Images of airborne particulate matter (soot) up to two microns in length were obtained using single-shot diffraction patterns obtained at the Linac Coherent Light Source, four times the size of objects previously imaged in similar experiments. This technique opens the door to femtosecond diffractive imaging of a wide range of micrometer-sized materials that exhibit irreproducible complexity down to the nanoscale, including airborne particulate matter, small cells, bacteria and gold-labeled biological samples.
Collapse
Affiliation(s)
- A V Martin
- Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Hau-Riege SP, Graf A, Döppner T, London RA, Krzywinski J, Fortmann C, Glenzer SH, Frank M, Sokolowski-Tinten K, Messerschmidt M, Bostedt C, Schorb S, Bradley JA, Lutman A, Rolles D, Rudenko A, Rudek B. Ultrafast transitions from solid to liquid and plasma states of graphite induced by x-ray free-electron laser pulses. Phys Rev Lett 2012; 108:217402. [PMID: 23003301 DOI: 10.1103/physrevlett.108.217402] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Indexed: 06/01/2023]
Abstract
We used photon pulses from an x-ray free-electron laser to study ultrafast x-ray-induced transitions of graphite from solid to liquid and plasma states. This was accomplished by isochoric heating of graphite samples and simultaneous probing via Bragg and diffuse scattering at high time resolution. We observe that disintegration of the crystal lattice and ion heating of up to 5 eV occur within tens of femtoseconds. The threshold fluence for Bragg-peak degradation is smaller and the ion-heating rate is faster than current x-ray-matter interaction models predict.
Collapse
Affiliation(s)
- S P Hau-Riege
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Adaniya H, Rudek B, Osipov T, Haxton DJ, Weber T, Rescigno TN, McCurdy CW, Belkacem A. Imaging the molecular dynamics of dissociative electron attachment to water. Phys Rev Lett 2009; 103:233201. [PMID: 20366147 DOI: 10.1103/physrevlett.103.233201] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Indexed: 05/29/2023]
Abstract
Momentum imaging experiments on dissociative electron attachment (DEA) to a water molecule are combined with ab initio theoretical calculations of the angular dependence of the quantum mechanical amplitude for electron attachment to provide a detailed picture of the molecular dynamics of dissociation attachment via the two lowest energy Feshbach resonances. The combination of momentum imaging experiments and theory can reveal dissociation dynamics for which the axial recoil approximation breaks down and thus provides a powerful reaction microscope for DEA to polyatomics.
Collapse
Affiliation(s)
- H Adaniya
- Department of Applied Science, University of California, Davis, California 95616, USA
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Abstract
A rare case of a giant pulmonary chondromatous hamartoma (15 cm, 1350 g) resected by a new laser system (Nd:YAG, 1318 nm, 40 W) is presented. The laser management of a hamartoma resection--the largest reported to date in the literature--is presented here.
Collapse
Affiliation(s)
- A Pereszlenyi
- Department of Thoracic and Vascular Surgery, Center for Pneumology, Thoracic and Vascular Surgery, Coswig Specialized Hospital, Coswig/Dresden, Germany.
| | | | | | | | | |
Collapse
|
19
|
Büchler P, Pfannschmidt J, Rudek B, Dienemann H, Lehnert T. Surgical treatment of hepatic and pulmonary metastases from non-colorectal and non-neuroendocrine carcinoma. Scand J Surg 2003; 91:147-54. [PMID: 12164514 DOI: 10.1177/145749690209100203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Surgical resection is standard treatment for colorectal and neuroendocrine liver metases provided the tumor can be removed completely. The same is true for isolated pulmonary metastases. To date, only few reports have addressed the value of surgical resection of organ metastases from other solid tumors. METHODS The literature was searched by Medline, conference proceedings and cross-referencing of published articles for information pertaining to the long-term results of surgical treatment of non-colorectal and non-neuroendocrine (NCNN) liver or lung metastases. RESULTS Resection of hepatic and pulmonary metastases is increasingly performed in non-colorectal and non-neuroendocrine malignancies. Mortality and morbidity of hepatic and pulmonary resection are low and 5 year survival can be expected to reach some 20-30 percent, irrespective of the histological type of the primary tumor. CONCLUSION Resection of hepatic or pulmonary metastasis should be considered in all patients with low operative risk provided that complete resection is possible.
Collapse
Affiliation(s)
- P Büchler
- Department of Surgery, University of Heidelberg, FRG
| | | | | | | | | |
Collapse
|
20
|
Abstract
The appearence of distant metastases or local recurrence is assumed to render gastric cancer incurable. However, experience with colorectal cancer has shown that patients with recurrent disease may have a chance for cure, if recurrent or metastatic disease can be completely resected. Since improved imaging allows detection of ever smaller tumour deposits, we have reviewed the pertinent literature to determine the current surgical options for recurrent or metastatic gastric cancer. Metastatic disease or local recurrence is rarely resectable. Tumour recurrence in the remnant stomach after partial gastrectomy can be treated by secondary total gastrectomy and may occasionally result in long-term survival. Other types of local recurrence are generally not amenable to complete resection. The same is true for distant metastases. If, however, distant metasases are technically resectable, 5 year survival of approximately 20% has been documented. Solitary and late appearing metachronous tumours are associated with an improved prognosis. As a consequence resection of distant metastases should be considered, because the risk of metastasectomy is generally low and there is no alternative treatment with a chance for cure.
Collapse
Affiliation(s)
- T Lehnert
- Division of Surgical Oncology, Department of Surgery, University of Heidelberg, Im Neuenheimer Feld 110, Heidelberg, D-69120, Germany.
| | | | | | | |
Collapse
|
21
|
Lehnert T, Rudek B, Kienle P, Buhl K, Herfarth C. Impact of diagnostic laparoscopy on the management of gastric cancer: prospective study of 120 consecutive patients with primary gastric adenocarcinoma. Br J Surg 2002; 89:471-5. [PMID: 11952590 DOI: 10.1046/j.0007-1323.2002.02067.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Peritoneal seeding or liver metastases found at laparotomy usually preclude curative treatment in patients with gastric adenocarcinoma. Such exploratory laparotomies may be avoided by diagnostic laparoscopy. However, routine diagnostic laparoscopy does not benefit those patients who proceed to laparotomy after negative laparoscopy. The aim of this study was to evaluate prospectively the selective use of laparoscopy in uncertain situations. METHODS One hundred and twenty consecutive patients with primary gastric adenocarcinoma were studied prospectively. Diagnostic laparoscopy was performed in patients with clinical T4 tumours or suspected metastases, unless laparotomy was required for symptomatic disease. RESULTS Ninety-six of 120 patients were selected for immediate laparotomy with curative intent (n = 81) or for palliation (n = 15). In two of the 81 patients gastrectomy was abandoned because of unexpected peritoneal carcinomatosis. Fifteen patients underwent diagnostic laparoscopy, which identified intra-abdominal metastases in six; the other nine patients proceeded to laparotomy, which revealed peritoneal metastases not detected at laparoscopy in four patients. The remaining nine patients had overt metastases and were referred for systemic chemotherapy without abdominal exploration. CONCLUSION Diagnostic laparoscopy in selected patients effectively limits the number of unnecessary invasive staging procedures. Routine use of diagnostic laparoscopy in all patients with gastric adenocarcinoma is not warranted.
Collapse
Affiliation(s)
- T Lehnert
- Section of Surgical Oncology, Department of Surgery, University of Heidelberg, Im Neuenheimer Feld 110, D-69120 Heidelberg, Germany.
| | | | | | | | | |
Collapse
|
22
|
Abstract
Intussusception of the appendix vermiformis in adults is an unusual entity. We present a 52-year-old male patient with intussusception of the appendix due to a mucinous cystadenoma, and discuss the clinical features, preoperative diagnosis, classification and therapy of this condition together with a review of the literature.
Collapse
Affiliation(s)
- B Rudek
- Department of Surgery, University of Heidelberg, Germany
| | | | | |
Collapse
|
23
|
Golling M, Arnold JC, Rudek B, Mehrabi A, Kraus T, Herfarth C, Klar E. HBV prophylaxis: cost/benefit analysis following liver transplantation for HBV-positive liver cirrhosis. Transplant Proc 1998; 30:3316-7. [PMID: 9838466 DOI: 10.1016/s0041-1345(98)01045-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- M Golling
- Department of General Surgery and Medicine, University of Heidelberg, Germany
| | | | | | | | | | | | | |
Collapse
|
24
|
Heuschen UA, Heuschen G, Rudek B, Hinz U, Stern J, Herfarth C. [Long-term quality of life after continence-preserving proctocolectomy for ulcerative colitis and familial adenomatous polyposis]. Chirurg 1998; 69:1052-8. [PMID: 9833184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
After ileal pouch-anal anastomosis in patients with ulcerative colitis (UC) and familial adenomatous polyposis (FAP), quality of life is a relevant factor for the assessment of the operation's success, in addition to postoperative morbidity and functional outcome. Between 1982 and 1995 restorative proctocolectomy was performed in 453 patients (UC: n = 332; FAP: n = 121) at the Department of Surgery, University of Heidelberg. We studied postoperative quality of life through a long-term follow-up study (median follow-up time 43.2 months). This study 1 year or more following ileostomy closure of persons who had undergone J-pouch anastomosis (n = 243 total; UC n = 185, FAP n = 58) revealed that at the time of follow-up, the underlying disease (UC versus FAP) and successfully treated complications are without influence on the quality of life. The patient's age (P < 0.01) and the presence of unsuccessfully treated complications (P < 0.0001) showed a significant influence on the quality of life. There was a distinct relation between the functional index and the quality of life index (coefficient of correlation r = -0.714). However, quality of life, comparable to that of healthy controls, can be achieved with UC and FAP patients by restorative proctocolectomy only if postoperative complications can be avoided or are successfully treated.
Collapse
Affiliation(s)
- U A Heuschen
- Chirurgische Klinik und Poliklinik, Universität Heidelberg
| | | | | | | | | | | |
Collapse
|
25
|
Golling M, Arnold JC, Rudek B, Theilmann L, Herfarth C, Otto G. [Prevention of hepatitis B--analysis of cost-effectiveness after liver transplantation]. Langenbecks Arch Chir Suppl Kongressbd 1998; 114:1048-50. [PMID: 9574328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
HBV recurrence, despite immunoprophylaxis which occurred in 67% of our patients, remains the main problem following liver transplantation for HBV infection. Pretransplant viral replication (HBV-DNA) and probably viral mutation may account to some degree for the failures involved in hyperimmunoglobulin prophylaxis. In order to improve the cost/benefit relationship, only HBV-DNA and HBeAG-negative patients should be selected or preoperatively seroconverted by nucleosides (famciclovir, lamivudine); post-operatively a variable HIG prophylaxis should be administered.
Collapse
Affiliation(s)
- M Golling
- Chirurgische und Medizinische Universitätsklinik Heidelberg
| | | | | | | | | | | |
Collapse
|