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Souma S, Sato T, Takahashi T, Baltzer P. High-intensity xenon plasma discharge lamp for bulk-sensitive high-resolution photoemission spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2007; 78:123104. [PMID: 18163717 DOI: 10.1063/1.2818806] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We have developed a highly brilliant xenon (Xe) discharge lamp operated by microwave-induced electron cyclotron resonance (ECR) for ultrahigh-resolution bulk-sensitive photoemission spectroscopy (PES). We observed at least eight strong radiation lines from neutral or singly ionized Xe atoms in the energy region of 8.4-10.7 eV. The photon flux of the strongest Xe I resonance line at 8.437 eV is comparable to that of the He Ialpha line (21.218 eV) from the He-ECR discharge lamp. Stable operation for more than 300 h is achieved by efficient air-cooling of a ceramic tube in the resonance cavity. The high bulk sensitivity and high-energy resolution of PES using the Xe lines are demonstrated for some typical materials.
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Fischer DR, Baltzer P, Malich A, Wurdinger S, Freesmeyer MG, Marx C, Kaiser WA. Is the ?blooming sign? a promising additional tool to determine malignancy in MR mammography? Eur Radiol 2004; 14:394-401. [PMID: 14517688 DOI: 10.1007/s00330-003-2055-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2003] [Revised: 06/02/2003] [Accepted: 07/14/2003] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate potential diagnostic relevance of blooming effect for verification of suspicious breast lesions in MR mammography (MRM). The MRM examinations of 1035 patients, all following the same imaging protocol (from 1994 to 2001) were retrospectively evaluated by two experienced radiologists in consensus. A total of 817 lesions showed a focal enhancement; of these, 793 were histologically verified after surgical intervention so that 514 malignant and 279 benign lesions could be evaluated. Using a 1.5-T Gyroscan ACS II-imager (Philips, Hamburg, Germany) and a double breast coil with the patient lying in a prone position, 0.1 mmol/kgbw Magnevist (Schering, Berlin, Germany) were injected into the cubital vein to obtain dynamic axial and coronal T1-weighted fast-field-echo images every minute up to 7 min after bolus injection. Blooming sign describes a progradient unsharpness of lesion borders initially sharply shaped and fast enhancing 7 min after bolus injection; 324 of 514 (63.0%) malignant lesions and 41 of 279 (14.7%) benign lesions revealed a blooming sign (sensitivity 63.0%, specificity 85.3%, accuracy 70.9%, positive predictive value 88.8%, negative predictive value 56.0%). Forty-one of 279 benign lesions showed a blooming sign; of these, there were 4 of 86 (4.7%) fibroadenomas, 2 of 21 (9.5%) phylloides tumours, 11 of 38 (28.9%) papillomas, 3 of 9 (33.3%) radial scars, 2 of 19 (10.5%) mastitis, 1 of 4 (25%) galactophoritis, 1 of 3 (33.3%) ADH and 19 of 99 (17.2%) mastopathic proliferations, respectively. Blooming sign is a phenomenon which should be taken into account when diagnosing MR mammographies because it might increase the ability to discriminate uncertain breast lesions; however, this effect can only be used as an additional item to other well-known effects such as plateau, washout and cancer corner.
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Baltzer P, Davidson RS, Tseung AC, Graetzel M, Kiwi J. Quantitative studies on the paramagnetic behavior of ruthenium dioxide-titanium dioxide (anatase) powders catalytically active in water oxidation. J Am Chem Soc 2002. [DOI: 10.1021/ja00317a065] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Öhrwall G, Baltzer P. Rotational line profile in the He I excited photoelectron spectrum of the X2B1[v′=(0,0,0)] state of H2O+. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00575-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Baltzer P, Karlsson L, Wannberg B, Holland D, MacDonald M, Hayes M, Eland J. An experimental study of the valence shell photoelectron spectrum of the NO2 molecule. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00240-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Eland J, Field T, Baltzer P, Hirst D. Photoelectron spectra, electronic structure, coincidence spectra and dissociation mechanisms of the hydrogen cyanide cation. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00036-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Baltzer P, Karlsson L, Wannberg B, Öhrwall G, Holland D, MacDonald M, Hayes M, von Niessen W. An experimental and theoretical study of the valence shell photoelectron spectrum of the benzene molecule. Chem Phys 1997. [DOI: 10.1016/s0301-0104(97)00244-9] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Holland D, Shaw D, Hayes M, Shpinkova L, Rennie E, Karlsson L, Baltzer P, Wannberg B. A photoabsorption, photodissociation and photoelectron spectroscopy study of C2H4 and C2D4. Chem Phys 1997. [DOI: 10.1016/s0301-0104(97)00090-6] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Eland J, Baltzer P, Lundqvist M, Wannberg B, Karlsson L. Vibrational structure of the BrCN+ ion from high resolution photoelectron spectroscopy. Chem Phys 1996. [DOI: 10.1016/s0301-0104(96)00197-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Baltzer P, Chau FT, Eland JHD, Karlsson L, Lundqvist M, Rostas J, Tam KY, Veenhuizen H, Wannberg B. A study of the vibronic structure in the HeI excited photoelectron spectrum of CO2involving theX 2ΠgandA 2Πuionic states. J Chem Phys 1996. [DOI: 10.1063/1.471626] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lundqvist M, Baltzer P, Edvardsson D, Karlsson L, Wannberg B. Novel time of flight instrument for doppler free kinetic energy release spectroscopy. PHYSICAL REVIEW LETTERS 1995; 75:1058-1061. [PMID: 10060195 DOI: 10.1103/physrevlett.75.1058] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Holland D, MacDonald M, Hayes M, Baltzer P, Karlsson L, Lundqvist M, Wannberg B, von Niessen W. An experimental and theoretical study of the valence shell photoelectron spectrum of sulphur dioxide. Chem Phys 1994. [DOI: 10.1016/0301-0104(94)00238-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Baltzer P, Larsson M, Karlsson L, Lundqvist M, Wannberg B. Vibrational and rotational structure in the He I-excited photoelectron spectrum of the A 2 Sigma 1/2+ state of HBr+. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:737-744. [PMID: 9910295 DOI: 10.1103/physreva.49.737] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Lundqvist M, Baltzer P, Karlsson L, Wannberg B. High-resolution monochromatized He II alpha -excited photoelectron spectrum of Ar between 28 and 40.8 eV. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:277-282. [PMID: 9910230 DOI: 10.1103/physreva.49.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Baltzer P, Larsson M, Karlsson L, Wannberg B. Inner-valence states of N2+ studied by uv photoelectron spectroscopy and configuration-interaction calculations. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 46:5545-5553. [PMID: 9908806 DOI: 10.1103/physreva.46.5545] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Correia N, Wannberg B, Baltzer P, Karlsson L, Svensson S, Adam MY, Aksela H, Aksela S. Vibrationally resolved states in the HS fragment studied by means of electron-excited Auger spectroscopy. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 46:6067-6070. [PMID: 9908867 DOI: 10.1103/physreva.46.6067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Baltzer P, Karlsson L, Wannberg B. Rotational line profiles in the He I-excited photoelectron spectrum of the N2 molecule. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 46:315-317. [PMID: 9907865 DOI: 10.1103/physreva.46.315] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Baltzer P, Wannberg B, Karlsson L, Larsson M. High-resolution inner-valence uv photoelectron spectra of the O2 molecule and configuration-interaction calculations of 2 Pi u states between 20 and 26 eV. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:4374-4384. [PMID: 9907512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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45
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Falk F, Carlsson-Göthe M, Wannberg B, Karlsson L, Svensson S, Baltzer P. Observation of a barrier and a double-potential curve in the C state of the CO+ molecule. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:R17-R19. [PMID: 9905744 DOI: 10.1103/physreva.44.r17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Göthe MC, Wannberg B, Karlsson L, Svensson S, Baltzer P, Chau FT, Adam M. X‐ray, ultraviolet, and synchrotron radiation excited inner‐valence photoelectron spectra of CH4. J Chem Phys 1991. [DOI: 10.1063/1.459880] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Keller R, Baltzer P, Keller-Wossidlo H, Gamp R, Ragaz A, Schaub T. [Acute effects of the natural atmospheric ozone exposure on lung function of clinically normal smokers and non-smokers]. SCHWEIZERISCHE MEDIZINISCHE WOCHENSCHRIFT 1990; 120:1724-30. [PMID: 2251491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The influence of moderate ambient ozone exposure on spirometric lung function and bronchial responsiveness was analyzed in 13 healthy adult nonsmokers and 11 asymptomatic smokers. The study was divided into an initial investigation at low atmospheric ozone concentrations of about 80 (range 68-102) micrograms/m3 and a subsequent similar testing at moderately elevated ozone concentrations above 140 (range 145-205) micrograms/m3. Overall there was a slight but significant impairment in forced expiratory volumes (p less than 0.002) at elevated compared with low ozone concentrations. Furthermore, a significant increase in bronchial responsiveness was shown, with a decrease in threshold dose for inhaled metacholine to produce a 50% fall in specific airway conductance (p less than 0.02). In both smokers and nonsmokers there was a similar change in lung function at ambient ozone concentrations, with more pronounced bronchial irritation in the smokers group. It is concluded that even moderately elevated ambient ozone concentrations can induce slight but significant ventilatory obstruction and an obvious increase in bronchial responsiveness in healthy adults. Although the minor impairment of lung function did not cause manifest acute respiratory problems, it still reduced maximal physical ventilation capacity. The results further support the assumption that air pollution may act as a primary trigger in the development of obstructive airway disease.
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Cesar A, Ågren H, Naves de Brito A, Svensson S, Karlsson L, Keane MP, Wannberg B, Baltzer P, Fournier PG, Fournier J. Vibronic and electronic states of doubly charged H2S studied by Auger and charge transfer spectroscopy and by ab initio calculations. J Chem Phys 1990. [DOI: 10.1063/1.459118] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Svensson S, Karlsson L, Baltzer P, Keane MP, Wannberg B. High-resolution Auger-electron spectrum of HCl and DCl. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 40:4369-4377. [PMID: 9902678 DOI: 10.1103/physreva.40.4369] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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50
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Wannberg B, Svensson S, Keane M, Karlsson L, Baltzer P. Isotope effects in the auger electron spectra of HBr and DBr. Chem Phys 1989. [DOI: 10.1016/0301-0104(89)80208-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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