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See detail192-Ir or 125-I Prostate Brachytherapy as a Boost to External Beam Radiotherapy in Locally Advanced Prostatic Cancer: A Dosimetric Point of View
Nickers, Philippe ULg; Thissen, Benedicte ULg; Jansen, Nicolas ULg et al

in Radiotherapy & Oncology (2006), 78(1), 47-52

PURPOSE: This work aims at comparing the dosimetric possibilities of 125I or 192Ir prostate brachytherapy (Bt) as a boost to external beam radiotherapy in the treatment of locally advanced adenocarcinoma ... [more ▼]

PURPOSE: This work aims at comparing the dosimetric possibilities of 125I or 192Ir prostate brachytherapy (Bt) as a boost to external beam radiotherapy in the treatment of locally advanced adenocarcinoma. METHODS AND MATERIALS: From 1/1997 to 12/2002, 260 patients were treated. Until 12/2001 a low dose rate (LDR) treatment with 192Ir wires was used, later replaced by a high dose rate (HDR) delivered with an 192Ir stepping source technology. For the present work, we selected 40 patients including the last 20 treated, respectively, by LDR and HDR. The planning CT Scans of all these 40 patients were transferred into the 3D Prowess system for 125I permanent implants design according to the Seattle method. The reference data for dosimetric comparisons were the V100 and the prescribed dose for 192Ir as well as the dose delivered with 125I techniques to the 192Ir V100. We compared V100-150 data as well as doses to the organs at risks (OR) and cold spots (CS). RESULTS: The V100 is 85.3+/-8% for 192Ir LDR and 96+/-2% for HDR techniques (P < 0.0001). In comparison with 125I, the 192Ir LDR mode induces higher hyperdosage volumes inside the CTV but also more CS, while maximal doses to urethra and rectum are, respectively, 17 and 39% less with 125I (P < 0.0001). In comparison with the 192Ir HDR mode, 125I Bt induces higher hyperdosage volumes and slightly more CS deliberately planned around the bladder neck. If delivered doses to urethra are identical, those to the 20% anterior part of the rectum are 33% less with 125I (P < 0,0001). The 125I Bt technique was only possible in 24 out of the 40 patients studied due to pelvic bone arch interference. CONCLUSIONS: At the present time, there is no evident dosimetric superiority of one Bt method when all the criteria are taken into account. However, improving Bt techniques to implant any prostatic size could found the superiority of the 125I or permanent implants. 125I indeed allows large hyperdosage volumes inside the CTV in comparison with 192Ir HDR techniques while lowering doses to OR and minimizing CS. [less ▲]

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See detail1924 : Marcel Thiry publie Toi qui pâlis au nom de Vancouver. « Docteur, j’ai un pied dans le XIXe neuvième siècle »
Purnelle, Gérald ULg

in Bertrand, Jean-Pierre; Biron, Michel; Denis, Benoît (Eds.) et al Histoire de la littérature belge francophone : 1830-2000 (2003)

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See detail192ir Low Dose Rate Brachytherapy for Boosting Locally Advanced Prostate Cancers after External Beam Radiotherapy: A Phase Ii Trial
Nickers, Philippe ULg; Coppens, Luc ULg; De Leval, Jean ULg et al

in Radiotherapy & Oncology (2006), 79(3), 329-34

BACKGROUND AND PURPOSE: To evaluate on 201 locally advanced prostatic cancers prospectively treated in a phase II trial, the efficacy of a combination of external beam radiotherapy (39.6 Gy) and (192)Ir ... [more ▼]

BACKGROUND AND PURPOSE: To evaluate on 201 locally advanced prostatic cancers prospectively treated in a phase II trial, the efficacy of a combination of external beam radiotherapy (39.6 Gy) and (192)Ir low dose rate brachytherapy (Bt) (40-45 Gy). PATIENTS AND METHODS: Sixty-four patients were included in the intermediate prognosis group with only one of the following adverse factors (PSA > 10 ng/ml, Gleason score > or = 7 or clinical stage > or =T2b) and 137 in the unfavourable group when at least two of these factors were present. RESULTS: The actuarial 4 years biochemical no evidence of disease is 82.8% for the entire population. It is, respectively, 97 and 76% in the intermediate and unfavourable prognosis groups (P < 0.0001). Grade > or =3 late urinary complications occurred in 13 patients (6.5%). Eight patients (4%) presented late grade 2 rectal complications but no grades 3-5 was observed. CONCLUSIONS: Even if an alpha/beta of 1.5-3 Gy theoretically favours the use of a high dose rate mode of irradiation, the early results presented here are as good as those reported for similar groups of patients with high dose rate treatments. Late toxicity is identical but our urinary toxicity is within the less favourable and rectal toxicity within the most favourable results. We can postulate that while inducing very high hyperdosage regions (V150) mainly focused on the peripheral zone, most of the Bt techniques consist of a more ablative treatment. Many of the radiobiological studies on Bt did not in fact take into account the heterogeneity of irradiation inside the CTV. This study highlights the need to explore pulsed dose rate therapies, permanent implant and new available radioisotopes such as (169)Ytterbium that will offer the safety of low and lower dose rates. The actual late toxicity of the different Bt techniques is not yet inexistent indeed. [less ▲]

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See detail1936-1940. Roman, reportage, théâtre, cinéma, BD au service du fascisme italien
Curreri, Luciano ULg

in Cahiers Internationaux de Symbolisme (2009), 122-123-124

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See detail1944-1945: tournant ou césure dans les relations franco-belges?
Lanneau, Catherine ULg

Scientific conference (2009, February 25)

L’imaginaire collectif réserve une place particulière à la "France éternelle", fer de lance de la civilisation européenne, fière de l’héritage de son passé comme des "principes de 89". Le devenir, le rôle ... [more ▼]

L’imaginaire collectif réserve une place particulière à la "France éternelle", fer de lance de la civilisation européenne, fière de l’héritage de son passé comme des "principes de 89". Le devenir, le rôle voire la mission de la "France nouvelle", celle du rédempteur de Gaulle, font débat en 1944-45. Dans une Europe en ruines, elle est l’inconnue de l’heure, celle dont le futur peut être fait du meilleur comme du pire. À la fois proches et différents d'elle, les francophones de Belgique, pétris de la même culture, oscilleront cependant entre amour et haine, entre la proclamation d’une parenté spirituelle et ethnique, et le souci d’affirmer une identité propre, la future belgitude. Pour eux aussi, la période 1944-45, entre les stigmates de la guerre et les déchirements de la Question Royale, n’est qu’une suite d’interrogations. Pour la première fois, le mouvement wallon se montre plus actif et revendicatif qu’un flamingantisme contraint par ses mauvais choix à une courbe rentrante. Craintes ou espoirs, étayés par le mythe de cette France résistante et novatrice, tant en politique intérieure qu’extérieure, agitent au besoin l’hypothèse d’un rattachement. Mais, très rapidement, le mythe fait place au malaise entre Bruxelles et Paris, d’autant que, désormais, la France doit affronter, sur tous les terrains, la fascination exercée par ses concurrents Anglo-Américains. [less ▲]

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See detailThe 1958-2008 Greenland ice sheet surface mass balance variability simulated by the regional climate model MAR
Fettweis, Xavier ULg

Poster (2009, April 24)

Results made with the regional climate model MAR over 1958-2008 show a very high interannual variability of the Greenland ice sheet (GrIS) surface mass balance (SMB) modelled in average to be 330 +/- 130 ... [more ▼]

Results made with the regional climate model MAR over 1958-2008 show a very high interannual variability of the Greenland ice sheet (GrIS) surface mass balance (SMB) modelled in average to be 330 +/- 130 km^3/yr. To a first approximation, the SMB variability is driven by the annual precipitation anomaly minus the meltwater run-off rate variability. Sensitivity experiments carried out by the MAR model evaluate the impacts on the surface melt of (i) the summer SST around the Greenland, (ii) the snow pack temperature at the beginning of the spring, (iii) the winter snow accumulation, (iv) the solid and liquid summer precipitations and (v) the summer atmospheric circulation. This last one, by forcing the summer air temperature above the ice sheet, explains mainly the surface melt anomalies. [less ▲]

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See detailThe 1958-2008 Greenland ice sheet surface melt and the mid-tropospheric atmospheric circulation
Fettweis, Xavier ULg

Conference (2009, April 23)

With the aim to study the impact of the mid-tropospheric circulation on the Greenland ice sheet (GrIS) surface melt simulated by the regional climate model MAR, we developed an automatic Circulation Type ... [more ▼]

With the aim to study the impact of the mid-tropospheric circulation on the Greenland ice sheet (GrIS) surface melt simulated by the regional climate model MAR, we developed an automatic Circulation Type Classification (CTC) based on the 500hPa geopotential height from reanalyses over the period 1958-2008. This CTC shows that the dominant mode of the regional atmospheric summer variability around the GrIS is linked to the North Atlantic Oscillation (NAO) and that the surface melt anomalies are highly correlated to the general circulation. It explains notably why a record surface melt was observed during the summers 2007 and 2008. In addition, the climate conditions occurring the 27th August of 2003, where the GrIS temperature was 10°C higher than the normal, were the consequence of an almost unique 500 hPa circulation in the 50 last years. [less ▲]

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See detailThe 1958–2009 Greenland ice sheet surface melt and the mid-tropospheric atmospheric circulation
Fettweis, Xavier ULg; Mabille, Georges; Erpicum, Michel ULg et al

in Climate Dynamics (2011), 36(1 (2011)), 139-159

In order to assess the impact of the mid-tropospheric circulation over the Greenland ice sheet (GrIS) on surface melt, as simulated by the regional climate model MAR, an automatic Circulation type ... [more ▼]

In order to assess the impact of the mid-tropospheric circulation over the Greenland ice sheet (GrIS) on surface melt, as simulated by the regional climate model MAR, an automatic Circulation type classification (CTC) based on 500 hPa geopotential height from reanalyses is developed. General circulation correlates significantly with the surface melt anomalies for the summers in the period 1958–2009. The record surface melt events observed during the summers of 2007–2009 are linked to the exceptional persistence of atmospheric circulations favouring warm air advection. The CTC emphasizes that summer 500 hPa circulation patterns have changed since the beginning of the 2000s; this process is partly responsible for the recent warming observed over the GrIS. [less ▲]

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See detail195au Biokinetics and Dosimetry
Brihaye, C.; Guillaume, Marcel

in European Journal of Nuclear Medicine (1990), 16(4-6), 369-71

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See detail1967-2007 : 40 ans pour le Livre blanc
Burny, Philippe ULg; De Proft, Michel

Article for general public (2007)

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See detail1969. J.J. Oversteegen: Vorm of vent. Opvattingen over de aard van het literaire werk in de Nederlandse kritiek tussen de twee wereldoorlogen
Spinoy, Erik ULg

in Internationale Neerlandistiek (2012), 50(special issue), 24-26

This is a short article evaluating a key contribution to the development of literary theory in the Dutch-speaking domain. The central thesis of the article is that the book under scrutiny is considerable ... [more ▼]

This is a short article evaluating a key contribution to the development of literary theory in the Dutch-speaking domain. The central thesis of the article is that the book under scrutiny is considerable more conservative and influenced by earlier views of literature than was originally acknowledged. [less ▲]

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See detail1978CA and 1978DA
Surdej, Jean ULg; Surdej, Anna ULg

in IAU Astronomical Telegram Nø 3185 (1978)

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See detailThe 1979-2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm
Fettweis, Xavier ULg

Poster (2007, April 16)

Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979-2005. Since 1979, the total melt area was found to ... [more ▼]

Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979-2005. Since 1979, the total melt area was found to have increased +1.22 x 10ˆ7 kmˆ2. An improved version of the cross-polarized gradient ratio (XPGR) technique is used to identify the melt from the brightness temperatures. The improvements in the melt retrieval XPGR algorithm as well as the surface melt acceleration are discussed with results from a coupled atmosphere-snow regional climate model. From 1979 to 2005, the ablation period increases everywhere over the melt zone except in the regions where the model simulates an increased summer snowfall. Indeed, more snowfall in summer decreases the liquid water content of the snowpack, raises the albedo and therefore reduces the melt. Finally, this melt acceleration over the Greenland ice sheet is highly correlated with both Greenland and global warming suggesting a continuing surface melt increase in the future. [less ▲]

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See detailThe 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm
Fettweis, Xavier ULg; van Ypersele, Jean-Pascal; Gallée, Hubert et al

in Geophysical Research Letters (2007)

Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979–2005. Since 1979, the total melt area was found to ... [more ▼]

Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979–2005. Since 1979, the total melt area was found to have increased by +1.22 × 107 km2. An improved version of the cross-polarized gradient ratio (XPGR) technique is used to identify the melt from the brightness temperatures. The improvements in the melt retrieval XPGR algorithm as well as the surface melt acceleration are discussed with results from a coupled atmosphere-snow regional climate model. From 1979 to 2005, the ablation period has been increasing everywhere over the melt zone except in the regions where the model simulates an increased summer snowfall. Indeed, more snowfall in summer decreases the liquid water content of the snowpack, raises the albedo and therefore reduces the melt. Finally, the observed melt acceleration over the Greenland ice sheet is highly correlated with both Greenland and global warming suggesting a continuing surface melt increase in the future. [less ▲]

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See detail1984 N1
Hafner, R.; Manfroid, Jean ULg

in International Astronomical Union Circulars [=IAUCs] (1984), 3968

IAUC 3968 available at Central Bureau for Astronomical Telegrams.

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See detailThe 1985 chlorine and fluorine inventories in the stratosphere based on atmos observations at 30-degrees north latitude
Zander, Rodolphe ULg; Gunson, Michael R.; Farmer, Crofton B. et al

in Journal of Atmospheric Chemistry (1992), 15(2), 171-186

The set of high-resolution infrared solar observations made with the Atmospheric Trace Molecule Spectroscopy (ATMOS) - Fourier transform spectrometer from onboard Spacelab 3 (30 April-1 May 1985) has been ... [more ▼]

The set of high-resolution infrared solar observations made with the Atmospheric Trace Molecule Spectroscopy (ATMOS) - Fourier transform spectrometer from onboard Spacelab 3 (30 April-1 May 1985) has been used to evaluate the total budgets of the odd chlorine and fluorine chemical families in the stratosphere. These budgets are based on volume mixing ratio profiles measured for HCl, HF, CH3Cl, ClONO2, CCl4, CCl2F2, CCl3F, CHClF2, CF4, COF2, and SF6, near 30-degrees north latitude. When including realistic concentrations for species not measured by ATMOS, i.e., the source gases CH3CCl3, and C2F3Cl3 below 25 km, and the reservoirs ClO, HOCl and COFCl between 15 and 40 km (five gases actually measured by other techniques), the 30-degrees-N zonal 1985 mean total mixing ratio of chlorine, Cl, was found to be equal to (2.58 +/- 0.10) ppbv (parts per billion by volume) throughout the stratosphere, with no significant decrease near the stratopause. The results for total fluorine indicate a slight, but steady, decrease of its volume mixing ratio with increasing altitude, around a mean stratospheric value of (1.15 +/- 0.12) ppbv. Both uncertainties correspond to one standard deviation. These mean springtime 1985 stratospheric budgets are commensurate with values reported for the tropospheric Cl and F concentrations in the early 1980s, when allowance is made for the growth rates of their source gases at the ground and the time required for tropospheric air to be transported into the stratosphere. The results are discussed with emphasis on conservation of fluorine and chlorine and the partitioning among source, sink, and reservoir gases throughout the stratosphere. [less ▲]

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See detailThe 1988-2003 Greenland ice sheet melt extent by passive microwave satellite data and a regional climate model
Fettweis, Xavier ULg; Gallée, Hubert; Lefebre, Filip et al

in Climate Dynamics (2006), 27(5), 531-541

Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used ... [more ▼]

Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing notably rainfall) on the ice sheet severely perturb the XPGR melt signal. Therefore, the original XPGR melt detection algorithm has been adapted to better incorporate atmospheric variability over the ice sheet and an updated melt trend for the 1988–2003 period has been calculated. Compared to the original algorithm, the melt zone area increase is eight times higher (from 0.2 to 1.7% year−1). The increase is higher with the improved XPGR technique because rainfall also increased during this period. It is correlated to higher atmospheric temperatures. Finally, the model shows that the total ice sheet runoff is directly proportional to the melt extent surface detected by satellites. These results are important for the understanding of the effect of Greenland melting on the stability of the thermohaline circulation. [less ▲]

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See detailThe 1991 EGAS Conference in Torun
Biémont, Emile ULg; Werth, G.

in Europhysics News (1991), 22

Detailed reference viewed: 6 (1 ULg)