ОСОБЕННОСТИ ТЕЧЕНИЯ ПАНКРЕОНЕКРОЗА У БОЛЬНЫХ С ТЕРМИНАЛЬНОЙ СТАДИЕЙ ВИЧ-ИНФЕКЦИИ ПО ДАННЫМ МСКТ И МРТ

The purpose of this retrospective study was to explore peculiarities of pancreatic necrosis in patients with end-stage HIV infection using MDCT and MRI. Comparisons with subsequent pathological studies revealed features of the pancreatonecrosis course: protracted persistent course, with a tendency to relapse, delimitation of exudative processes, depending on the predominance of one or another AIDS-related infections. Pancreatonecrosis on a background of generalized toxoplasmosis was observed in 2 patients (18%) and was accompanied by formation of specific cysts secondary to the presence of hemorrhage and calcination, mesenteric lymphadenopathy, without the presence of additional inflammatory fluid streaks. Pancreatonecrosis on a background of generalized tuberculosis was observed in 4 patients (36%). It noted the severe and widespread destruction of pancreas with miliary parenchymal and mesenteric dissimination, mesenteric lymphadenopathy, the presence of additional inflammatory fluid streaks in the abdominal cavity and retroperitoneal space. The density of inflammatory fluid streaks was relatively high, at 15-30 HU. Out of 5 (46%) evaluable patients with pancreatic necrosis on the background of generalized mycosis 2 had revealed candidiasis, in 1 - cryptococcosis, in 2 - actinomycosis. Destruction of the pancreas on the background of different fungal infection accompanied by the appearance of multiple focal formations (microabscesses) due to rapidly emerging adhesions in exudative changes mild abdominal and mesenteric lymphadenopathy and had no significant differences depending on the pathogen.Целью настоящего исследования явилось ретроспективное комплексное (с использованием мультиспиральной компьютерной томографии и магнитно-резонансной томографии) изучение особенностей течения панкреонекроза у больных с терминальной стадией ВИЧ-инфекции. Сопоставление с данными последующих патоморфологических исследований позволило выявить особенности течения панкреонекроза, заключающиеся в затяжном персистирующем течении, со склонностью к рецидивированию и отграничению экссудативных процессов, в зависимости от преобладания той или иной СПИД-ассоциированной инфекции. Панкреонекроз на фоне генерализованного токсоплазмоза отмечен у 2 больных (18%) и сопровождался формированием специфических кист с наличием вторичного кровоизлияния и кальцинации, мезентериальной лимфаденопатией, без наличия дополнительных затеков воспалительной жидкости. Панкреонекроз на фоне генерализованного туберкулеза наблюдали у 4 пациентов (36%). При этом отмечена выраженная и распространенная деструкция железы с милиарной паренхиматозной и мезентериальной диссеминацией, мезентериальной лимфаденопатией, наличием дополнительных затеков воспалительной жидкости в брюшной полости и забрюшинном пространстве. Денситометрическая плотность воспалительной жидкости затеков была достаточно высокая и составляла 15-30 HU. Из 5 (46%) обследованных пациентов с панкреонекрозом на фоне генерализованного микоза у 2 выявлен кандидоз, у одного - криптококкоз, у 2 - актиномикоз. Деструкция поджелудочной железы на фоне различной грибковой инфекции не имела значимых отличий в зависимости от возбудителя, сопровождалась появлением множественных очаговых образований (микроабсцессов) на фоне быстро формирующегося спаечного процесса при слабовыраженых экссудативных изменениях брюшной полости и мезентериальной лимфаденопатии

Performance of the CMS Cathode Strip Chambers with Cosmic Rays

The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device in the CMS endcaps. Their performance has been evaluated using data taken during a cosmic ray run in fall 2008. Measured noise levels are low, with the number of noisy channels well below 1%. Coordinate resolution was measured for all types of chambers, and fall in the range 47 microns to 243 microns. The efficiencies for local charged track triggers, for hit and for segments reconstruction were measured, and are above 99%. The timing resolution per layer is approximately 5 ns

Performance and Operation of the CMS Electromagnetic Calorimeter

The operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These muons were recorded after the closure of the CMS detector in late 2008. The calorimeter is made of lead tungstate crystals and the overall status of the 75848 channels corresponding to the barrel and endcap detectors is reported. The stability of crucial operational parameters, such as high voltage, temperature and electronic noise, is summarised and the performance of the light monitoring system is presented

Calibration of the CMS Drift Tube Chambers and Measurement of the Drift Velocity with Cosmic Rays

Peer reviewe

CMS physics technical design report : Addendum on high density QCD with heavy ions

Peer reviewe

CMS Data Processing Workflows during an Extended Cosmic Ray Run

Peer reviewe

Alignment of the CMS silicon tracker during commissioning with cosmic rays

The CMS silicon tracker, consisting of 1440 silicon pixel and 15 148 silicon strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys. The positions of the modules were determined with respect to cosmic ray trajectories to an average precision of 3-4 microns RMS in the barrel and 3-14 microns RMS in the endcap in the most sensitive coordinate. The results have been validated by several studies, including laser beam cross-checks, track fit self-consistency, track residuals in overlapping module regions, and track parameter resolution, and are compared with predictions obtained from simulation. Correlated systematic effects have been investigated. The track parameter resolutions obtained with this alignment are close to the design performance

Aligning the CMS Muon Chambers with the Muon Alignment System during an Extended Cosmic Ray Run

Peer reviewe

Commissioning and performance of the CMS silicon strip tracker with cosmic ray muons

This is the Pre-print version of the Article. The official published version of the Paper can be accessed from the link below - Copyright @ 2010 IOPDuring autumn 2008, the Silicon Strip Tracker was operated with the full CMS experiment in a comprehensive test, in the presence of the 3.8 T magnetic field produced by the CMS superconducting solenoid. Cosmic ray muons were detected in the muon chambers and used to trigger the readout of all CMS sub-detectors. About 15 million events with a muon in the tracker were collected. The efficiency of hit and track reconstruction were measured to be higher than 99% and consistent with expectations from Monte Carlo simulation. This article details the commissioning and performance of the Silicon Strip Tracker with cosmic ray muons.This work is supported by FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTDS (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA)

Alignment of the CMS muon system with cosmic-ray and beam-halo muons

This is the Pre-print version of the Article. The official published version of the Paper can be accessed from the link below - Copyright @ 2010 IOPThe CMS muon system has been aligned using cosmic-ray muons collected in 2008 and beam-halo muons from the 2008 LHC circulating beam tests. After alignment, the resolution of the most sensitive coordinate is 80 microns for the relative positions of superlayers in the same barrel chamber and 270 microns for the relative positions of endcap chambers in the same ring structure. The resolution on the position of the central barrel chambers relative to the tracker is comprised between two extreme estimates, 200 and 700 microns, provided by two complementary studies. With minor modifications, the alignment procedures can be applied using muons from LHC collisions, leading to additional significant improvements.This work is supported by FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR(Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTDS (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA)