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- Bruzzi, M, et al.
(författare)
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Radiation-hard semiconductor detectors for SuperLHC
- 2005
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Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - : Elsevier BV. - 0167-5087 .- 0168-9002. ; 541:1-2, s. 189-201
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Tidskriftsartikel (refereegranskat)abstract
- An option of increasing the luminosity of the Large Hadron Collider (LHC) at CERN to 1035 cm-2 s-1 has been envisaged to extend the physics reach of the machine. An efficient tracking down to a few centimetres from the interaction point will be required to exploit the physics potential of the upgraded LHC. As a consequence, the semiconductor detectors close to the interaction region will receive severe doses of fast hadron irradiation and the inner tracker detectors will need to survive fast hadron fluences of up to above 1016cm-2. The CERN-RD50 project "Development of Radiation Hard Semiconductor Devices for Very High Luminosity Colliders" has been established in 2002 to explore detector materials and technologies that will allow to operate devices up to, or beyond, this limit. The strategies followed by RD50 to enhance the radiation tolerance include the development of new or defect engineered detector materials (SiC, GaN, Czochralski and epitaxial silicon, oxygen enriched Float Zone silicon), the improvement of present detector designs and the understanding of the microscopic defects causing the degradation of the irradiated detectors. The latest advancements within the RD50 collaboration on radiation hard semiconductor detectors will be reviewed and discussed in this work.
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| 2. |
- Halldorsson, K, et al.
(författare)
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CT after emergency surgery in penetrating trauma: a seven-year experience in a level I Nordic trauma center
- 2023
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Ingår i: Acta radiologica (Stockholm, Sweden : 1987). - : SAGE Publications. - 1600-0455 .- 0284-1851. ; 64:2, s. 684-689
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Tidskriftsartikel (refereegranskat)abstract
- Patients with severe penetrating trauma may require emergency surgery on arrival, and postoperative computed tomography (CT) can reveal significant additional injuries. Purpose To determine the utility of postoperative CT performed within 48 h of emergency surgery after penetrating trauma. Material and Methods Trauma registry data were retrieved over a seven-year period at a single level 1 trauma center. All patients aged ≥17 years, admitted with penetrating injury, who underwent urgent surgery and postoperative CT imaging within 48 h, were included. Pre- and intraoperative medical records were compared to CT findings. Age, sex, Injury Severity Score (ISS), New Injury Severity Score (NISS), 30-day mortality, injury mechanism, surgical intervention, and intensive care unit length of stay were extracted. Results Out of 1262 patients, 38 fulfilled the study criteria (36 men [94.7%], 2 women [5.3%]; mean age = 31.5 years. Stab wound (SW) was the most common injury mechanism (26/38, 68.4%) followed by gunshot wound (GSW; 10/38, 26.3%). Patients with GSWs were more severely injured than SW victims (median NISS = 34 [range = 3–75]; for GSWs = 34; for SWs = 26; P = 0.045). Out of 38 patients, 20 (52.6%) had additional findings at postoperative CT. Six patients (15.8%) had unidentified or underestimated findings at CT that were severe enough to warrant additional surgery or angiography. Conclusion Postoperative CT imaging after emergency surgery in penetrating trauma is an important tool in evaluating the injury panorama. Out of 38 patients, 6 (15.8%) had findings at postoperative CT that warranted additional surgical or angiographic intervention.
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| 5. |
- Thorisdottir, S, et al.
(författare)
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Diagnostic performance of CT and the use of GI contrast material for detection of hollow viscus injury after penetrating abdominal trauma. Experience from a level 1 Nordic trauma center
- 2020
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Ingår i: Acta radiologica (Stockholm, Sweden : 1987). - : SAGE Publications. - 1600-0455 .- 0284-1851. ; 61:10, s. 1309-1315
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Tidskriftsartikel (refereegranskat)abstract
- Use of gastrointestinal (GI) contrast material for computed tomography (CT) diagnosis of hollow viscus injury (HVI) after penetrating abdominal trauma is still controversial. Purpose To assess the sensitivity of CT and GI contrast material use in detecting HVI after penetrating abdominal trauma. Material and Methods Retrospective analysis (2013–2016) of patients with penetrating abdominal trauma. Data from the local trauma registry, medical records, and imaging from PACS were reviewed. CT and surgical findings were compared. Results Of 636 patients with penetrating trauma, 177 (163 men, 14 women) had abdominal trauma (mean age 34 years, age range 16–88 years): 155/177 (85%) were imaged with CT on arrival; 128/155 (83%) were stab wounds and 21/155 (14%) were gunshot wounds; 47/155 (30%) had emergent surgery after CT. Two patients were imaged using oral, rectal and i.v. contrast; 23 with rectal and i.v. contrast; and 22 with i.v. contrast only. Surgery revealed HVI in 26 patients. CT had an overall sensitivity 69.2%, specificity 90.5%, PPV 90.0%, and NPV 70.4%. CT with oral and/or rectal contrast (n = 25) had sensitivity 66.7%, specificity 71.4%, PPV 85.7%, and NPV 45.5%. CT with i.v. contrast only (n = 22) had 75% sensitivity, 100% specificity, PPV 100%, and NPV 87.5%. No statistically significant difference was found between sensitivity of CT with GI contrast material and i.v. contrast only ( P = 1). Conclusion Stab wounds were the most common cause of penetrating abdominal trauma. CT had 69.2% sensitivity and 90.5% specificity in detecting HVI. CT with GI contrast had similar sensitivity as CT with i.v. contrast only.
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