Relevant bibliographies by topics / CT 3000

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'CT 3000'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "CT 3000"

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Shibata, Shobu, and Kazuo Mori. "Effect of radiation therapy on extracerebral cavernous hemangioma in the middle fossa." Journal of Neurosurgery 67, no. 6 (December 1987): 919–22. http://dx.doi.org/10.3171/jns.1987.67.6.0919.

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✓ Intracerebral cavernous hemangiomas are relatively easy to remove surgically, but extracerebral cavernous hemangiomas attached to the cavernous sinus are extremely difficult to treat. The authors report three cases of extracerebral cavernous hemangioma in the middle fossa that were treated with radiotherapy. The follow-up studies with serial computerized tomography (CT) scans during and after irradiation are described. In Case 1 radiotherapy after partial removal of the tumor decreased the tumor size on the contrast-enhanced CT scans, reduced its Hounsfield units on the nonenhanced CT scans, and facilitated later total tumor removal. In Case 2 the tumor responded to irradiation with approximately 3000 rads, showing significant reduction in size and Hounsfield units of the tumor. Subtotal removal was then possible. In Case 3 the tumor responded to irradiation, and the patient's vertigo improved after delivery of approximately 3000 rads. The CT scan showed significant reduction in the size and Hounsfield units of the tumor. No surgical intervention was deemed necessary. It is concluded that, in cases of extracerebral cavernous hemangioma with massive hemorrhage, irradiation with up to 3000 rads may be the treatment of choice. Radiation therapy offers an increased probability of total removal of the tumor and the possibility of eliminating surgery.
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Primachenko, V. V., K. I. Kushchenko, Yu A. Krakhmal, and Yu Ye Mishnyova. "Research of the plastic strength of alumina mass for molding corundum ceramics by extrusion depending on them humidity." Scientific research on refractories and technical ceramics 118 (July 11, 2018): 102–10. http://dx.doi.org/10.35857/2663-3566.118.09.

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One of the characteristics that makes it possible to evaluate the plasticity and formability of ceramic masses is the plastic strength of structure — the ultimate shear stress that the plastic mass can withstand under static stress. The dependence researches of the plastic strength of alumina masses from alumina MARTOXID and CT 3000 brands on a flour binder on their humidity and keeping time were carried out. The determination of the plastic strength of the masses was carried out on a KP-3 conical plastometer, for which purpose a cone with an apex angle of 30о was used (mass of the cone together with rod is 0.8056 kg). The optimum humidity of alumina masses for the molding of corundum ceramics by extrusion from alumina MARTOXID brand is 19 % and from alumina CT 3000 brand is 20 % were established. In depending on technological needs and capabilities were set that, the keeping time of alumina masses with the optimum humidity can be 1—7 days. The samples of corundum ceramics received by extrusion from the alumina mass of alumina MARTOXID and CT 3000 brands with optimum humidity after firing at 1580 оC are characterized by low open porosity and correspond to high refractories corundum high-density products requirements (open porosity no more 0.8 %).
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Bulut, Mehmet, Aylin Yaman, Muhammet Kazim Erol, Fatma Kurtuluş, Devrim Toslak, Berna Doğan, Deniz Turgut Çoban, and Ebru Kaya Başar. "Choroidal Thickness in Patients with Mild Cognitive Impairment and Alzheimer’s Type Dementia." Journal of Ophthalmology 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7291257.

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Aim. To asses both choroidal thickness differences among Alzheimer’s type dementia (ATD) patients, mild cognitive impairment (MCI) patients, and healthy control (C) subjects and choroidal thickness relationships with cognitive performance.Methods. A total of 246 eyes of 123 people (41 ATD, 38 MCI, and 44 healthy C subjects) were included in this study. Complete ophthalmological and neurological examination was performed in all subjects. Choroidal thicknesses (CT) were measured at seven locations: the fovea, 500-1500-3000 μm temporal and 500-1500-3000 μm nasal to the fovea by enhanced depth imaging optical coherence tomography (EDI-OCT). Detailed neurological examination including mini mental state examination (MMSE) test which evaluates the cognitive function was applied to all participants.Results. The ages and genders of all participants were similar in all groups. Compared with healthy C subjects, the CT measurements at all regions were significantly thinner both in patients with ATD and in patients with MCI than in healthy C subjects (p<0.05). The MMSE scores were significantly different among ATD patients, MCI patients, and healthy C subjects. They were19.3±1.8,24.8±0.9, and27.6±1.2in ATD, MCI, and healthy controls, respectively (p<0.001). There were also significant correlation between MMSE score and choroidal thickness at each location (p<0.05).Conclusions. CT was reduced in ATD patients and MCI patients. Since vascular structures were affected in ATD patients and MCI patients, they had thin CT. Besides CT was correlated with degree of cognitive impairment. Therefore CT may be a new biomarker in diagnosis and follow-up of MCI and ATD patients.
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Saleh, Ahmed, Jillian Gruber, Wajeeh Bakhsh, Paul T. Rubery, and Addisu Mesfin. "How Common is the Ponticulus Posticus? A CT-Based Analysis of 3000 Patients." Spine Journal 16, no. 10 (October 2016): S344. http://dx.doi.org/10.1016/j.spinee.2016.07.276.

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Yu, Nan, Yadi Zhang, Lei Kang, Ying Gao, Junqing Zhang, and Yuan Wu. "Analysis in Choroidal Thickness in Patients with Graves’ Ophthalmopathy Using Spectral-Domain Optical Coherence Tomography." Journal of Ophthalmology 2018 (December 23, 2018): 1–5. http://dx.doi.org/10.1155/2018/3529395.

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Objectives. The objective of the study is to observe changes in choroidal thickness (CT) in patients with Graves’ ophthalmopathy using spectral-domain optical coherence tomography (SD-OCT). Methods. The right eyes of 36 patients (27 females and 9 males) with Graves’ ophthalmopathy (GO) and those of 36 age-, gender-, and diopter-level-matched healthy participants were evaluated. The patients’ data were obtained within 3 months after the onset of Graves’ disease (GD). Thyroid hormone levels and thyroid-stimulating hormone receptor antibody (TRAb) levels were measured, and the degree of exophthalmos was measured in all patients. Activity is measured by the clinical activity score (CAS). A horizontal scan centered on the fovea was performed in all participants. Five points of choroidal thickness were measured at the fovea (SFCT) and at 1500 μm nasal (N1500), 3000 μm nasal (N3000), 1500 μm temporal (T1500), and 3000 μm temporal (T3000) to the fovea. Results. The CT measurements obtained were (mean ± SD) 313.47 ± 100.32 μm, 279.22 ± 85.80 μm, 214.64 ± 75.52 μm, 313.19 ± 80.36 μm, and 298.14 ± 82.75 μm in patients with GO and were 256.33 ± 50.18 μm, 223.14 ± 59.61 μm, 176.69 ± 60.66 μm, 250.92 ± 52.184 μm, and 239.47 ± 60.35 μm in the control group at the foveal, N1500, N3000, T1500, and T3000 measurement points, respectively. The CT in GO patients was significantly increased at all the points compared with the control group (P<0.05). There was no relationship between the CT and CAS, the degree of exophthalmos, triiodothyronine (T3), tetraiodothyronine (T4), thyroid-stimulating hormone (TSH), or TRAb levels in GO. Conclusions. CT was found to be increased in GO patients and had poor relationship with CAS, exophthalmos, and thyroid function tests.
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Matsunaga, Yuta, Yuya Kondo, Kenichi Kobayashi, Masanao Kobayashi, Kazuyuki Minami, Shoichi Suzuki, Koichi Chida, and Yasuki Asada. "VOLUME CT DOSE INDEX AND DOSE-LENGTH PRODUCT VALUES ACCORDING TO FACILITY SIZE IN JAPAN." Radiation Protection Dosimetry 188, no. 2 (January 16, 2020): 261–69. http://dx.doi.org/10.1093/rpd/ncz284.

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Abstract The aim of this study was to investigate differences in volume computed tomography dose index (CTDIvol) and dose-length product (DLP) values according to facility size in Japan. A questionnaire survey was sent to 3000 facilities throughout Japan. Data from each facility were collected including bed number, computed tomography (CT) scan parameters employed and the CTDIvol and/or DLP values displayed on the CT scanner during each examination. The CTDIvol and DLP for 11 adult and 6 paediatric CT examinations were surveyed. Comparison of CTDIvol and DLP values of each examination according to facility size revealed key differences in CT dose between small and large facilities. This study highlights the importance of lowering the dose of coronary artery examination with contrast agent in smaller facilities and of lowering the dose of adult and paediatric head CT without contrast agent in larger facilities. The results of this study are valid in Japan.
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Cartolari, R. "Functional Evaluation of the Lumbar Spine with Axial Loaded Computed Tomography (AL-CT) and Cine AL-CT." Rivista di Neuroradiologia 10, no. 5 (October 1997): 569–84. http://dx.doi.org/10.1177/197140099701000514.

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This study reports a personal experience in the functional study of the lumbar spine with original diagnostic techniques called Axial Loaded Computed Tomography (AL-CT) and Cine AL-CT, based on the use of the Axial Loader, a device that develops a variable and reproducible axial load in a supine patient during computed tomography or magnetic resonance investigation3,4. We built a non ferromagnetic, X-ray transparent bed (the Axial Loader), with double blocking rests for shoulders and feet, that can be used during CT and MR spine studies. The inferior block is a platform that moves continuously in a longitudinal direction, with a micrometric mechanism. A dynamometer placed between the inferior platform and the patient's feet can measure the load applied. We studied 75 patients, with a clinical and diagnostic suspicion of lumbar spine instability. The examinations were performed on a conventional CT unit (GE Sytec 3000, General Electric, Milwaukee) with a “volumetric” approach to the lumbar spine. In conclusion, AL-CT and Cine AL-CT is currently the only diagnostic modality that can give dynamic information on the differents UFSs in all their components in one mildy invasive, easily reproducible diagnostic examination.
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Gruber, Jillian, Ahmed Saleh, Wajeeh Bakhsh, Paul T. Rubery, and Addisu Mesfin. "Cervical Ossification of the Posterior Longitudinal Ligament (OPLL): A CT-Based Analysis of 3000 Patients." Spine Journal 16, no. 10 (October 2016): S279. http://dx.doi.org/10.1016/j.spinee.2016.07.391.

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Ruder, Thomas D. "Post-mortem CT from head to toe – how to approach a stack of 3000 images." Pathology 51 (February 2019): S23. http://dx.doi.org/10.1016/j.pathol.2018.12.050.

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Park, Ho Young, Hyun-Jin Bae, Gil-Sun Hong, Minjee Kim, JiHye Yun, Sungwon Park, Won Jung Chung, and NamKug Kim. "Realistic High-Resolution Body Computed Tomography Image Synthesis by Using Progressive Growing Generative Adversarial Network: Visual Turing Test." JMIR Medical Informatics 9, no. 3 (March 17, 2021): e23328. http://dx.doi.org/10.2196/23328.

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Background Generative adversarial network (GAN)–based synthetic images can be viable solutions to current supervised deep learning challenges. However, generating highly realistic images is a prerequisite for these approaches. Objective The aim of this study was to investigate and validate the unsupervised synthesis of highly realistic body computed tomography (CT) images by using a progressive growing GAN (PGGAN) trained to learn the probability distribution of normal data. Methods We trained the PGGAN by using 11,755 body CT scans. Ten radiologists (4 radiologists with <5 years of experience [Group I], 4 radiologists with 5-10 years of experience [Group II], and 2 radiologists with >10 years of experience [Group III]) evaluated the results in a binary approach by using an independent validation set of 300 images (150 real and 150 synthetic) to judge the authenticity of each image. Results The mean accuracy of the 10 readers in the entire image set was higher than random guessing (1781/3000, 59.4% vs 1500/3000, 50.0%, respectively; P<.001). However, in terms of identifying synthetic images as fake, there was no significant difference in the specificity between the visual Turing test and random guessing (779/1500, 51.9% vs 750/1500, 50.0%, respectively; P=.29). The accuracy between the 3 reader groups with different experience levels was not significantly different (Group I, 696/1200, 58.0%; Group II, 726/1200, 60.5%; and Group III, 359/600, 59.8%; P=.36). Interreader agreements were poor (κ=0.11) for the entire image set. In subgroup analysis, the discrepancies between real and synthetic CT images occurred mainly in the thoracoabdominal junction and in the anatomical details. Conclusions The GAN can synthesize highly realistic high-resolution body CT images that are indistinguishable from real images; however, it has limitations in generating body images of the thoracoabdominal junction and lacks accuracy in the anatomical details.
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Dissertations / Theses on the topic "CT 3000"

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Kornrumpf, Benthe. "Visuo-spatial attention in reading." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17627.

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Visuell-räumliche Aufmerksamkeit spielt eine Schlüsselrolle in der Wortverarbeitung und der Augenbewegungskontrolle beim Lesen. Dennoch bleibt die räumliche und zeitliche Dynamik von Aufmerksamkeitsbereitstellung innerhalb einer Fixation ungeklärt. Die vorliegende Dissertation nutzt drei Ansätze in der Ko-Registrierung von Augenbewegungen und EEG um diese Forschungslücke zu untersuchen und direkte Einblicke in die Aufmerksamkeitsverteilung zwischen Fovea und Parafovea, ihre Anpassung an Verarbeitungsansprüche und Sakkaden sowie ihre Auswirkungen auf Wortverarbeitung zu liefern. In Studie 1 wurde das Probe Paradigma als Maß zur Abbildung räumlicher Aufmerksamkeit ohne Augenbewegungen implementiert. Die vergrößerte, Probe-bezogene N1 zwischen Wortpräsentationen deutet auf eine Bereitstellung und Umverteilung zusätzlicher Ressourcen zur simultanen fovealen und parafovealen Wortverarbeitung hin. Studie 2 untersuchte den Preview Benefit und seine Modulation durch Sakkaden und Verarbeitungsschwierigkeit und zielte darauf ab, das elektrophysiologische Korrelat als indirektes Maß für parafoveale Aufmerksamkeit in ERPs und FRPs zu etablieren. Es zeigte sich ein Effekt des orthographischen Previews auf die N1. Interaktionen mit Lesemodus und Verarbeitungsschwierigkeit implizieren, dass dem Preview Effekt Aufmerksamkeitseffekte zugrunde liegen. In Studie 3 wurden zwei Datensätze hinsichtlich der Lateralisierung von Oszillationen im Alpha-Band untersucht um die in Studie 2 generierten Hypothesen zu unterstützen. Alpha war im sakkadischen Lesen stärker rechts-lateralisiert als in RSVP und eine stärkere Lateralisierung sagte eine kürzere Fixationsdauer vorher, was die Rolle von parafovealer Aufmerksamkeit und ihre Verbindung zu Sakkaden betont. Trotz der Einschränkungen der drei Ansätze stellt die Kombination von Augenbewegungen, ERPs, FRPs und EEG-Oszillationen geeignete Maße für Aufmerksamkeitsprozesse in der Wortverarbeitung dar, die traditionelle Forschungsmethoden ergänzen.
Visuo-spatial attention is a key contributor to word processing and oculomotor control in reading. Yet, the spatial and temporal dynamics of attention allocation within a fixation remain unclear. The present dissertation uses three approaches in the co-registration of eye movements and EEG to investigate this gap and provide direct, online insights into attention distribution across fovea and parafovea, its adaptation to processing load and saccadic behavior, as well as its effects on word processing. In Study 1, the probe paradigm was implemented as a mapping tool of spatial attention adaptation in the absence of eye movements, yielding ERPs. The enhanced probe-related N1 in-between trials indicates a recruitment and redistribution of additional resources to achieve simultaneous foveal and parafoveal word-recognition. Study 2 tested the preview benefit and its modulation by saccades and foveal load, thereby aiming at establishing its electrophysiological correlate as an indirect index of parafoveal attention allocation in ERPs and FRPs. There was an effect of orthographic preview on the N1. Interactions with reading mode and foveal load indicate underlying attention effects. In Study 3, two datasets were reanalyzed with regard to the lateralization of oscillatory activity in the alpha-band in order to directly support the assumptions generated in Study 2. Alpha was more strongly right-lateralized in saccadic reading compared to RSVP, and moment-to-moment lateralization predicted shorter subsequent fixation duration, emphasizing the role of parafoveal attention allocation and its relation to saccades. Despite the limitations of the three approaches at this point, the combination of eye movements, ERPs, FRPs, and EEG oscillations provides suitable online markers of attention processes in word recognition that complement traditional research methods.
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Schnake, Klaus John. "CT-basierte Computernavigation von Pedikelschrauben an der Brustwirbelsäule." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2002. http://dx.doi.org/10.18452/14782.

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Die Einführung der Computer-assistierten Navigation von Pedikelschrauben an der Wirbelsäule in den klinischen Alltag konnte in mehreren Studien eine signifikante Senkung der Fehlplatzierungsraten auf deutlich unter 10% zeigen. Es existieren aber nur spärliche Daten bezüglich der Navigation an der Brustwirbelsäule und deren Anwendung bei unfallchirurgischen Patienten, typischerweise mit frischen Frakturen. Ziel dieser Arbeit war es, die Genauigkeit der CT-basierten Navigation von Pedikelschrauben an der Brustwirbelsäule mit Hilfe eines optoelektronischen Navigationssystems bei Patienten mit Frakturen, Tumoren und Entzündungen im Vergleich zur konventionellen Technik zu untersuchen. Dazu wurden bei 85 Patienten 324 Pedikelschrauben, 211 navigiert und 113 konventionell, an der Brustwirbelsäule gesetzt. Die Navigation erfolgte mit einem optoelektronischen System, wobei zusätzlich ein Bildverstärker zur Lagekontrolle verwendet wurde. Postoperativ wurde die Pedikelschraubenplatzierung mit Hilfe von Computertomogrammen dargestellt und durch einen unabhängigen Radiologen ausgewertet. In der navigierten Gruppe wurden 174 (82,5%) Schrauben korrekt platziert. In der konventionellen Gruppe waren es mit 77 (68,1%) Schrauben signifikant weniger (p < 0,003). Allerdings ließen sich erhebliche Fehllagen von über 4 mm in 1,9% der Fälle trotz Navigation nicht vermeiden. Die zusätzliche Röntgendurchleuchtung vermied vor allem die Navigation falscher Wirbelkörper sowie Abweichungen der Schrauben nach kaudal bzw. kranial.
Several studies have shown that computer assisted pedicle screw insertion in spinal surgery can decrease pedicle perforation rate significantly to less than 10%. However, few data exist concerning the accuracy of pedicle screw navigation in the thoracic spine in trauma patients. The goal of this study was to evaluate the accuracy of CT-based computer assisted pedicle screw insertion in the thoracic spine in patients with fractures, metastases and spondylodiscitis compared to conventional technique. 324 pedicle screws were inserted in the thoracic spines of 85 patients. 211 screws were placed using a CT-based optoelectronic navigation system assisted by an image intensifier. 113 screws were placed with conventional technique. Screw positions were evaluated with postoperative CT-scans by an independent radiologist. In the computer assisted group 174 (82,5%) screws were found completely within their pedicles compared with 77 (68,1%) correctly placed srews in the conventional group (p < 0,003). Despite of using the navigation system 1,9% of the computer assisted screws perforated the pedicle wall more than 4 mm. The additional use of the image intensifier helped identifying the correct vertebral body and avoided cranial or caudal pedicle wall perforations.
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Grieser, Christian. "Erkennung zerebraler Ischämie mittels computertomographischer Perfusionskartographie und CT-Angiographie." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2006. http://dx.doi.org/10.18452/15429.

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Zielsetzung In den Industrieländern stellt der Schlaganfall nach kardiovaskulären und Krebs – erkrankungen die dritthäufigste Krankheitsgruppe dar. Im Hinblick auf die Therapie des akuten Schlaganfalls muss die bildgebende Diagnostik schnell und einfach das Ausmaß der zerebralen Ischämie beschreiben können. Ziel dieser Studie war die Einführung und die Validierung eines CT – Protokolls, welches die Diagnostik des akuten Schlaganfalls verbessern soll. Zu diesem CT – Protokoll gehören ein Nativ – CT des Schädels, eine CT – Perfusionsuntersuchung und eine CT – Angiographie. Zusätzlich wollte diese Arbeit herausfinden, ob es physiologische Unterschiede zwischen der grauen Substanz und der weißen Substanz gibt, deren Kenntnis entscheidend für die Auswertung von computertomographischen Perfusionsuntersuchungen sind. Material und Methoden Insgesamt wurden 101 Patienten (Alter von 14 – 94 Jahre, mittleres Alter 69 Jahre) mit einem 8 – bzw. 16 – Zeilen – MSCT (Light Speed Ultra oder Light Speed pro 16, GE Healthcare), die zur Abklärung einer zerebralen Ischämie zum CT vorgestellt wurden, untersucht. Zuerst wurde eine native CT – Serie akquiriert. In der Untersuchung der zerebralen Perfusion wurde eine 2 cm breite Schicht über 60 sec mit 20 intermittierenden Aufnahmen während einer Injektion von 40 ml Kontrastmittel (Iopromid, Jodgehalt von 370 mg) aufgezeichnet. Daran an schloss sich eine CT – Angiographie Untersuchung. Zur Bestimmung des regionalen zerebralen Blutflusses, des regionalen zerebralen Blutvolumens und der mittleren Verweildauer wurden definierte Messfelder (Regions of Interests, ROIs) bestimmt und mit der kontralateralen Hemisphäre verglichen. Ergebnisse Es konnte gezeigt werden, dass der regionale zerebrale Blutfluss und das Blutvolumen im Bereich der Hirnrinde höher sind als im Hirnmark. Insgesamt wurden 66 Patienten mit einer zerebralen Ischämie wurden gefunden. Bei 22 dieser Patienten konnte ein Infarktgeschehen in der Nativ – CT diagnostiziert werden. Diese Ischämien ließen sich auch in der CT – Perfusion mit reduziertem regionalem zerebralem Blutfluss und verlängerter mittlerer Verweildauer nachweisen. Zusätzlich fanden sich 44 Patienten von 101 Untersuchten, die in der CT – Perfusion ein Perfusionsdefizit aufwiesen. Bei diesen Patienten ließ sich kein entsprechendes Korrelat in der Nativ – CT nachweisen. Für 38 dieser 44 Patienten konnte eine CTA durchgeführt werden, wovon für 35 Patienten ein Korrelat zwischen der CT – Perfusion und der CTA gefunden werden konnte. Schlussfolgerung Die Ergebnisse dieser Arbeit zeigen, dass es physiologische Unterschiede zwischen der Hirnrinde und dem Hirnmark gibt, deren Kenntnis für die Bewertung computertomographischer Perfusionsuntersuchungen eine wesentliche Interpretationshilfe darstellt. In Bezug auf die Diagnostik des akuten Schlaganfalls mit der Nativ – CT konnte diese Arbeit zeigen, dass der Nachweis von Infarktfrühzeichen eingeschränkt ist. Mit Hilfe der CT – Perfusion ist es möglich, anhand von zerebralen Perfusionswerten den Schweregrad und die Ausdehnung der zerebralen Ischämie zu bestimmen. Die CT – Angiographie zeigt eine gute Korrelation zur CT – Perfusion, es lassen sich zuverlässig Gefäßverschlüsse darstellen. Im Hinblick auf das weitere Therapievorgehen geben diese Methoden eine wichtige Hilfestellung, etwa zur Überlegung, ob man eine Lysetherapie durchführen sollte oder nicht.
Purpose Stroke is the third – leading cause of death in developed countries, following cardiovascular disease and cancer. There is a need for an easily and rapidly performed technique to detect cerebral ischemia in the first hours after its occurrence. The purpose of this study was the introduction and validation of a Stroke protocol which includes an unenhanced CT scan, a CT Perfusion and a CT Angiography. Furthermore, the purpose of this study was to determine if there is a difference between Perfusion parameters in gray and white matter, which are necessary to know while performing perfusion maps. Data and Methodology A total of 101 patients (age range 14 – 94, average age 69 years) were examined using multiple row CT (8 / 16 row multiple detector, light ultra speed or light speed 16, GE medical systems) for diagnosing cerebral ischemia. First a series of native images was acquired. During the examination of cerebral perfusion a 2 cm wide slab was recorded for 60 sec with 20 intermittent scans following injection of 40 ml of contrast medium with an iodine content of 370 mg / ml. By defining Regions of Interests (ROIs) regional cerebral blood flow (CBF), regional cerebral blood volume (CBV) and mean transit time (MTT) were calculated. Results Physiological regional cerebral blood flow and cerebral blood volume in gray matter were higher than in white matter. In total 66 patients with a cerebral ischemia were found. The unenhanced CT detected 22 patients with cerebral ischemia, which were confirmed by CT Perfusion in all cases. These ischemic areas revealed reduced regional CBF and extended MTT. Furthermore an ischemia correlative was discovered by perfusion analysis for 44 patients (out of 101 investigated) where the extent of the cerebral ischemia had not been visible by unenhanced CT. For 38 out of 44 patients with cerebral ischemia we were able to perform a CTA. For 35 out of these 38 patients, we found a sizable correlation between perfusion maps and CTA. Conclusion There are physiological differences for CT Perfusion parameters between gray and white matter, which are necessary to know for the interpretation of perfusion maps. However, this examination was able to show that unenhanced CT is not always capable of showing early CT signs. With the help of CT perfusion it is possible to detect the extent of acute cerebral ischemia. Furthermore, CT Angiography shows a sizable correlation compared to CT Perfusion. In conjunction, these methods give important Information for the early diagnosis and the therapeutic strategy of ischemic brain injury.
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Books on the topic "CT 3000"

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Joseph Schoepf, U., ed. Multidetector-Row CT of the Thorax. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/3-540-30006-6.

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Great Britain. Medical Devices Directorate., ed. Single product CT report on the imaging performance of the IGE Sytec 3000 scanner. London: Department of Health,Medical Devices Directorate, 1992.

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Book chapters on the topic "CT 3000"

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Sheth, Sheila, and Elliot K. Fishman. "CT in Kidney Cancer." In Medical Radiology, 29–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30003-1_3.

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Drosten, R., E. van Sonnenberg, and S. Shankar. "CT-Guided Thoracic Interventions." In Multidetector-Row CT of the Thorax, 423–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30006-6_29.

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Steinert, H. C., G. K. von Schulthess, and G. K. von Schulthess. "PET/CT of the Thorax." In Multidetector-Row CT of the Thorax, 225–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30006-6_16.

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Kauczor, H. U. "MDCT in Diffuse Lung Disease." In Multidetector-Row CT of the Thorax, 81–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30006-6_6.

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Partik, B. L., A. N. Leung, and C. J. Herold. "Pulmonary Infections: Imaging with MDCT." In Multidetector-Row CT of the Thorax, 107–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30006-6_7.

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Schiepers, Christiaan. "PET and PET/CT in Kidney Cancer." In Medical Radiology, 89–101. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30003-1_6.

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Steinert, Hans C., Gerhard Goerres, and Gustav K. von Schulthess. "PET/CT in Lung, Head and Neck Cancer." In Diagnostic Nuclear Medicine, 205–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-30005-8_12.

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8

Lezcano, Leonardo, Miguel-Ángel Sicilia, and Eydel Rivero. "Semantic Integration of Patient Data for Clinical Decision Support in Breast Cancer Care." In Advances in Healthcare Information Systems and Administration, 250–67. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-3000-0.ch010.

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Achieving semantic interoperability between heterogeneous healthcare systems and integrating clinical guidelines in the automatic decision support of healthcare institutions are two key priorities of current medical informatics. They can lead to a significant improvement on patient safety by reducing medical risks and delays in diagnosis, facilitating continuity of care and preventing life threatening adverse events. The present chapter describes a project that addresses those two priorities in the field of Breast Cancer for which effective clinical guidelines are available, as well as the clinical data to apply them. However, the deployment of semantic interoperability techniques based on clinical terminologies such as SNOMED-CT and EHR exchange models such as openEHR and HL7 is required to meaningfully combine the available data. Then data mining techniques are capable of automatically adapting the parameters of clinical guidelines to the particular conditions of each healthcare environment.
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Carter, R., and C. J. McKay. "Acute pancreatitis." In Oxford Textbook of Medicine, 2557–67. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199204854.003.152401_update_001.

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Acute pancreatitis affects 300 to 600 new patients per million population per year and is most commonly caused by gallstones or alcohol, but there are many other causes and associations. Careful imaging reveals that most so-called idiopathic acute pancreatitis is due to small (1–3 mm diameter) gallstones. Diagnosis is made by a combination of a typical presentation (upper abdominal pain and vomiting) in conjunction with raised serum amylase (> × 3 upper limit of normal) and/or lipase (> × 2 upper limit of normal). Several acute abdominal emergencies can mimic acute pancreatitis and may be associated with a raised serum amylase. These include perforated peptic ulcer (particularly perforated posterior gastric ulcer) and acute mesenteric ischaemia. In equivocal cases, a CT scan is indicated in order to exclude other causes and confirm the diagnosis....
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Carter, R., Euan J. Dickson, and C. J. McKay. "Acute pancreatitis." In Oxford Textbook of Medicine, edited by Jack Satsangi, 3209–18. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0335.

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Acute pancreatitis affects 300 to 600 new patients per million population per year and is most commonly caused by gallstones or alcohol. Careful imaging reveals that most so-called idiopathic acute pancreatitis is due to small (1–3-mm diameter) gallstones. Diagnosis is made by a combination of a typical presentation (upper abdominal pain and vomiting) in conjunction with raised serum amylase (more than three times the upper limit of normal) and/or lipase (more than twice the upper limit of normal). Several other acute abdominal emergencies can mimic acute pancreatitis and may be associated with a raised serum amylase. In equivocal cases, a CT scan is indicated to exclude other causes and confirm the diagnosis. Initial management is with (1) analgesia, (2) ensuring adequate oxygenation, and (3) intravenous fluid administration. The revision of the Atlanta classification separates patients clinically into (1) mild—with early resolution without complications, (2) moderate—local complications without organ failure, and (3) severe—complications associated with organ failure. Mild acute pancreatitis responds to analgesia and intravenous fluids. If gallstones have been identified, then cholecystectomy (or endoscopic retrograde cholangiopancreatography (ERCP) sphincterotomy where clinically appropriate) should be performed during the same admission, or at least within 2 to 4 weeks to prevent recurrent attacks. Severe acute pancreatitis carries a high mortality (up to 20%). Management in the early stages is centred on organ support (respiratory, circulatory, and renal failure). Later management involves surgical or radiological intervention for sepsis, usually within a specialist pancreatic unit.
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Conference papers on the topic "CT 3000"

1

"Design, development and performance evaluation of CT imaging in Inliview 3000 animal PET/SPECT/CT system." In 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC). IEEE, 2013. http://dx.doi.org/10.1109/nssmic.2013.6829114.

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Kauer, Robert, Aleksandar Jovanovic, Sture Angelsen, and Gjermund Vage. "Plant Asset Management: RIMAP (Risk-Based Inspection and Maintenance for European Industries) - The European Approach." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3020.

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The paper presents an overview of the European project RIMAP (Risk-Based Inspection and Maintenance for European Industries) as well as a more detailed insight into its application for the power industry (RIMAP Power Workbook). RIMAP is partly financed by the European Commission for the “Growth Programme, Research Project”; Contract Number GIRD-CT-2001-03008.
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Aaltonen, L., T. Speeti, M. Saukoski, and K. Halonen. "An interface for a 300°/s capacitive 2-axis micro-gyroscope with pseudo-CT readout." In 2009 IEEE International Solid-State Circuits Conference (ISSCC 2009). IEEE, 2009. http://dx.doi.org/10.1109/isscc.2009.4977449.

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Rojas-López, J. A., E. López-Pineda, C. A. Reynoso-Mejía, and M. E. Brandan. "Dependence of the TLD-300 glow curve on the photon field direction of incidence. Studies in air and in phantom for mammography and CT x-rays." In 1ST INTERNATIONAL CONFERENCE ON BIOINFORMATICS, BIOTECHNOLOGY, AND BIOMEDICAL ENGINEERING (BIOMIC 2018). Author(s), 2019. http://dx.doi.org/10.1063/1.5095902.

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You might also be interested in the extended bibliographies on the topic 'CT 3000' for particular source types:
Journal articles
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