A5040496341- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Medical Imaging Techniques and Applications
- Digital Radiography and Breast Imaging
- Pelvic and Acetabular Injuries
- Dental Radiography and Imaging
- Breast Cancer Treatment Studies
- Autopsy Techniques and Outcomes
- Advanced Radiotherapy Techniques
- Radioactivity and Radon Measurements
University of Helsinki
2014-2022
Helsinki University Hospital
2015-2022
Helsinki Institute of Physics
2014-2022
Radiation and Nuclear Safety Authority
2014-2016
Dental radiography may involve situations where the patient is known to be pregnant or pregnancy noticed after X-ray procedure. In such cases, radiation dose foetus, though low, needs estimated. Uniform and widely used guidance on dental procedures during are presently lacking, usefulness of lead shields unclear practices vary.
Journal Article Fetal radiation dose in computed tomography Get access Anna Kelaranta, Kelaranta * 1HUS MedicalImaging Center, University of Helsinki and Hospital, PO Box 340, FI-00290 Helsinki, Finland2Department Physics, 64, FI-00014 Finland *Corresponding author: anna.kelaranta@alumni.helsinki.fi Search for other works by this author on: Oxford Academic PubMed Google Scholar Touko Kaasalainen, Kaasalainen Raija Seuri, Seuri Paula Toroi, Toroi 3STUK – Radiation Nuclear Safety Authority,...
In mammography dosimetry, phantoms are often used to represent breast tissue. The conformance of phantom- and patient-based mean glandular dose (MGD) estimates was evaluated mainly from the aspect diagnostic reference levels. Patient phantom exposure data were collected for eight three screening devices. More extensive assessments performed two average thickness close nationally 50 mm in (50 mm, SD = 13 n 5342) (47 395) examinations. MGD all breasts differed by 2 % determined limited...
Radiation worker categorization and exposure monitoring are principal functions of occupational radiation safety. The aim this study was to use the actual data in a large university hospital estimate frequency magnitude potential exposures radiology. additional propose revised practice based on exposures. cumulative probability distribution calculated from normalized integral density function fitted data. Conformity probabilistic model checked against 16 years national estimated...
Lead shields are commonly used in X-ray imaging to protect radiosensitive organs and minimise patient's radiation dose. However, they might also complicate or interfere with the examination, even decrease diagnostic value if positioned incorrectly. In this study, dose effect of waist half-apron lead shield was examined via Monte Carlo simulations postero-anterior (PA) chest radiography examinations using a female anthropomorphic phantom. Relevant for determination were lungs, breasts, liver,...