Data acquisition and processing in in-vivo nuclear medicine

Um die Strahlenexposition und das Strahlenrisiko für die Bevölkerung durch die nuklearmedizinische Diagnostik in Bulgarien zu ermitteln, wurde eine Erhebung für das Jahr 1980 über die Arten und Anzahl der Applikationen von Radiopharmaka, über die verwendeten Aktivitäten und über die Geschlechts- und Altersverteilung der untersuchten Patienten durchgeführt. Die Gesamtzahl diagnostischer in vivo Applikationen betrug 116418 (davon 40,5% bei Männern und 59,5% bei Frauen), d.h. 13,1 Applikationen per 1000 Einwohner. Die applizierte Gesamtaktivität aller 44 verwendeter Radiopharmaka betrug ca. 2,1 TBq (56 Ci). Die Geschlechts- und Altersverteilung der untersuchten Patienten war ähnlich jener in anderen Ländern: nur 17,4% aller Patienten waren im reproduktionsfähigen Alter, 52,7% waren über 45 Jahre alt. Im Vergleich zu anderen entwickelten Ländern war in Bulgarien im Jahr 1980 der Anteil der 131J-Jodid-Untersuchungen verhältnismäßig hoch.

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Patients with fever of unknown origin (FUO): diagnosis by nuclear medicine imaging

Nuklearmedizin ◽

10.1055/s-0038-1623872 ◽

2001 ◽

Vol 40 (03) ◽

pp. 59-70 ◽

Cited By ~ 13

Author(s):

W. Becker ◽

J. Meiler

Keyword(s):

Nuclear Medicine ◽

Fever Of Unknown Origin ◽

Tumor Imaging ◽

White Blood Cells ◽

Unknown Origin ◽

Final Diagnosis ◽

Recurrent Fever ◽

Nuclear Medicine Imaging

SummaryFever of unknown origin (FUO) in immunocompetent and non neutropenic patients is defined as recurrent fever of 38,3° C or greater, lasting 2-3 weeks or longer, and undiagnosed after 1 week of appropriate evaluation. The underlying diseases of FUO are numerous and infection accounts for only 20-40% of them. The majority of FUO-patients have autoimmunity and collagen vascular disease and neoplasm, which are responsible for about 50-60% of all cases. In this respect FOU in its classical definition is clearly separated from postoperative and neutropenic fever where inflammation and infection are more common. Although methods that use in-vitro or in-vivo labeled white blood cells (WBCs) have a high diagnostic accuracy in the detection and exclusion of granulocytic pathology, they are only of limited value in FUO-patients in establishing the final diagnosis due to the low prevalence of purulent processes in this collective. WBCs are more suited in evaluation of the focus in occult sepsis. Ga-67 citrate is the only commercially available gamma emitter which images acute, chronic, granulomatous and autoimmune inflammation and also various malignant diseases. Therefore Ga-67 citrate is currently considered to be the tracer of choice in the diagnostic work-up of FUO. The number of Ga-67-scans contributing to the final diagnosis was found to be higher outside Germany than it has been reported for labeled WBCs. F-l 8-2’-deoxy-2-fluoro-D-glucose (FDG) has been used extensively for tumor imaging with PET. Inflammatory processes accumulate the tracer by similar mechanisms. First results of FDG imaging demonstrated, that FDG may be superior to other nuclear medicine imaging modalities which may be explained by the preferable tracer kinetics of the small F-l 8-FDG molecule and by a better spatial resolution of coincidence imaging in comparison to a conventional gamma camera.

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A guide to LIDAR data acquisition and processing for the forests of the Pacific Northwest.

10.2737/pnw-gtr-768 ◽

2008 ◽

Cited By ~ 15

Author(s):

Demetrios Gatziolis ◽

Hans-Erik. Andersen

Keyword(s):

Data Acquisition ◽

Pacific Northwest ◽

Lidar Data ◽

The Pacific ◽

Data Acquisition And Processing

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Development of intelligent data acquisition and processing system for near-infrared spectrum

JOURNAL OF ELECTRONIC MEASUREMENT AND INSTRUMENT ◽

10.3724/sp.j.1187.2013.00319 ◽

2014 ◽

Vol 27 (4) ◽

pp. 319-324 ◽

Cited By ~ 1

Author(s):

Xiaoguang Liu ◽

Xiaojin Men ◽

Manli Dou ◽

Chun Shi ◽

Gang Wu

Keyword(s):

Infrared Spectrum ◽

Data Acquisition ◽

Near Infrared ◽

Processing System ◽

Data Acquisition And Processing ◽

Intelligent Data Acquisition ◽

Near Infrared Spectrum

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Combined Electromagnetic and Magnetometer Data Acquisition and Processing

10.21236/ada603940 ◽

2005 ◽

Author(s):

Roger Young ◽

Rob Siegel ◽

Alan Crandall

Keyword(s):

Data Acquisition ◽

Magnetometer Data ◽

Data Acquisition And Processing

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A new wearable multichannel magnetocardiogram system with a SERF atomic magnetometer array

Scientific Reports ◽

10.1038/s41598-021-84971-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yanfei Yang ◽

Mingzhu Xu ◽

Aimin Liang ◽

Yan Yin ◽

Xin Ma ◽

...

Keyword(s):

Independent Component Analysis ◽

Data Acquisition ◽

Current Distribution ◽

Spin Exchange ◽

Healthy Human ◽

Ecg Signals ◽

Mode Decomposition ◽

Magnetometer Array ◽

Data Acquisition And Processing ◽

Electrocardiogram Ecg

AbstractIn this study, a wearable multichannel human magnetocardiogram (MCG) system based on a spin exchange relaxation-free regime (SERF) magnetometer array is developed. The MCG system consists of a magnetically shielded device, a wearable SERF magnetometer array, and a computer for data acquisition and processing. Multichannel MCG signals from a healthy human are successfully recorded simultaneously. Independent component analysis (ICA) and empirical mode decomposition (EMD) are used to denoise MCG data. MCG imaging is realized to visualize the magnetic and current distribution around the heart. The validity of the MCG signals detected by the system is verified by electrocardiogram (ECG) signals obtained at the same position, and similar features and intervals of cardiac signal waveform appear on both MCG and ECG. Experiments show that our wearable MCG system is reliable for detecting MCG signals and can provide cardiac electromagnetic activity imaging.

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