A5091107912- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Medical Imaging Techniques and Applications
- Digital Radiography and Breast Imaging
- Advanced Radiotherapy Techniques
- Radiology practices and education
- Cardiac, Anesthesia and Surgical Outcomes
- AI in cancer detection
- Dental Radiography and Imaging
- Radiation Effects and Dosimetry
- Advancements in Transdermal Drug Delivery
- Effects of Radiation Exposure
- Recycling and Waste Management Techniques
- Hemodynamic Monitoring and Therapy
- Radiomics and Machine Learning in Medical Imaging
- Radiation Therapy and Dosimetry
- Systemic Sclerosis and Related Diseases
- Legal processes and jurisprudence
- Advances in Oncology and Radiotherapy
- Finance, Taxation, and Governance
- Healthcare cost, quality, practices
- Medical Imaging and Pathology Studies
- MRI in cancer diagnosis
- Medical Malpractice and Liability Issues
- Health Systems, Economic Evaluations, Quality of Life
Federal Office for Radiation Protection
2021-2023
Helmholtz Zentrum München
2008-2018
Azienda Ospedaliera Ospedale Maggiore
2018
University Medical Center of the Johannes Gutenberg University Mainz
2017
Johannes Gutenberg University Mainz
2017
Instituto de Investigación Sanitaria del Hospital Clínico San Carlos
2015
United States Food and Drug Administration
2009-2013
Walter Reed National Military Medical Center
2011
National Institute of Standards and Technology
2011
National Institutes of Health
2011
Patient contact shielding has been in use for many years radiology departments order to reduce the effects and risks of ionising radiation on certain organs. New technologies projection imaging CT scanning such as digital receptors automatic exposure control systems have reduced doses improved image consistency. These changes a greater understanding both benefits from led review radiology. A number professional bodies already issued guidance this regard. This paper represents current...
To retrospectively evaluate patient radiation doses in projection radiography after the transition to computed (CR) authors' hospital.The hospital's ethical committee approved study and waived informed consent. In 2001, a dose reduction initiative was implemented, which involved collecting radiographic parameters, calculating entrance doses, monitoring changes with an online computer, training program for radiographers conducted. A database 204 660 values used compute over time. Sample sizes...
The purpose of this study is to characterize the x-ray properties a dual-modality, anthropomorphic breast phantom whose MRI have been previously evaluated. goal provide platform for optimization and standardization two- three-dimensional imaging modalities lesion detection discrimination. constructed using mixture lard egg whites, resulting in variable, tissue-mimicking structure with separate adipose- glandular-mimicking components. can be produced either compressed or uncompressed shape....
Patient contact shielding has been in use for many years radiology departments order to reduce the effects and risks of ionising radiation on certain organs. New technologies projection imaging CT scanning such as digital receptors automatic exposure control (AEC) systems have reduced doses improved image consistency. These changes a greater understanding both benefits from led review radiology. A number professional bodies already issued guidance this regard. This paper represents current...
Contact shielding (CS) of patients during X-ray studies has been used for decades to protect radiosensitive organs. This practice not changed much despite increasing evidence that CS is useful in many cases. The Gonad And Patient Shielding (GAPS) group-founded by representatives the main European bodies involved radiology-promoted this survey assess current among radiology departments and attitude towards a non-shielding policy.
The purpose of this paper is to investigate the impact a commercial lead apron on patient skin dose delivered during maxillofacial CBCT in five critical regions by means solid-state-dosimetry. Five anatomical (thyroid gland, left and right breast, gonads, back phantom torso) an adult female anthropomorphic were selected for measurement highly sensitive solid-state dosimeter QUART didoSVM. Ten repeated single exposures assessed each body region total devices with without present. Shielded...
Quality control of cone-beam computed tomography (CBCT) systems is an essential part quality assurance to periodically check that requirements are met, reduce uncertainties and errors ...
Recent advances in computed tomography (CT) technology have considerably improved the quality of CT images and reduced radiation exposure patients. At present, however, there is no generally accepted figure merit (FOM) for comparing dose efficiencies systems.(i) To establish an FOM that characterizes relation to by means a mathematical model observer (ii) evaluate new on different systems image reconstruction algorithms.Images homogeneous phantom with four low-contrast inserts were acquired...
A straightforward method is presented to estimate peak skin doses (PSDs) delivered by computed tomography (CT) scanners. The measured PSD values are related the well-known volume CT dose index (CTDI(vol)), displayed on console of measurement estimates were obtained, in four units, placing radiochromic film surface a CTDI head phantom. Six different X-ray tube currents including maximum allowed value used irradiate and CTDI(vol) independently later console. scanner-specific relationship was...
A phantom for image quality evaluation of digital mammography systems is presented and compared to the most widely used phantoms in Europe US. The contains objects subjective detection Landolt rings (four-alternative, forced-choice task) objective calculation signal-difference-to-noise ratios (SDNR), both a titanium background within 12-step wedge. Evaluating images corresponding exposures between 15 160 mAs (average glandular dose 0.2 2 mGy), resulting scores were obtained following...
A non-standard scanning device with dose-reduction potential was proposed at the SPIE Medical Imaging conference 2006. The new obtains Radon data after X-ray beam is collimated through a special mask. This mask combined geometry that permits an efficient collection, thus has of reducing dose by factor two. In this work, we report prototype and experimental acquisition using only geometry. order to obtain optimal parameters for device, several factors have been considered, including detector...
Preliminary results for a new CT scanning device with dose-reduction potential were presented at the SPIE Medical Imaging conference 2007. The acquires Radon data after X-ray beam is collimated through special mask. This mask combined and efficient collection geometry; thus has of reducing dose by factor two. In this work, we report first complete proof idea using same simplified 197 detectors as last year, clinical C-arm flat panel detector to simulate gantry. addition enables acquisition...
X-ray cabinets are replacing 137 Cs/60 Co sources in radiation biology research due to advantages size, handling, and protection. However, because of their different physical properties, more susceptible experimental influences than conventional sources. The aim this study was examine the variations related setups typically used investigate biological effects with cabinets.A combined approach dose measurements by thermoluminescence dosimetry detection quantification γH2AX 53BP1 foci analyze...
Purpose: This paper presents the features of a new laboratory x-ray platform for 3D breast imaging at FDA and initial projection images tomosynthesis reconstructions. Materials methods: The consists an x- ray generator, tube detector, as well seven step- per motors controlling four linear three rotary stages. All components are currently being integrated using LabView to allow automated operation lab. We used 3 different phantoms obtain images. From all possible geometry arrangements...