WFRF:(Dance David R)
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03095nam a2200349 4500 | |
| 001 | oai:DiVA.org:liu-57875 | |
| 003 | SwePub | |
| 008 | 100702s2004 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-578752 URI |
| 040 | a (SwePub)liu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a vet2 swepub-contenttype |
| 072 | 7 | a rap2 swepub-publicationtype |
| 100 | 1 | a Ullman, Gustavu Linköpings universitet,Radiofysik,Hälsouniversitetet4 aut0 (Swepub:liu)gusul07 |
| 245 | 1 0 | a Distributions of scatter-to-primary ratios in chest PA radiography using grid or air gap for scatter-rejection |
| 264 | 1 | a Linköping :b Linköping University Electronic Press,c 2004 |
| 300 | a 39 s. | |
| 338 | a electronic2 rdacarrier | |
| 490 | 0 | a Report / Institutionen för radiofysik, Universitetet i Linköping, 1998- ;v 100 |
| 520 | a The aim for this work was to calculate distributions of scatter-to-primary ratios (εs/εp) and signal-to-noise ratios per pixel (SNRp) for a large set of imaging systems with either grid or air gap for scatter rejection. Grids with ratio 8-16 and air gap length 20 and 40 cm were used. The tube voltage was varied between 90-150 kV and three patient thickness between 20-28 cm were tested in order to compare scatter-rejections techniques for different conditions. Distributions of this sort may provide useful information on how physical image quality (contrast, SNR) is distributed over the chest PA image. A Monte Carlo computer program was used for the calculations, including a model of both the patient (voxel phantom) and the imaging system. The mean value of the εs/εp is 0.39 in the hilar region and 1.72 in the lower mediastinal region. For a 28 cm patient, the corresponding values are 0.42 in the hilar region and 2.58 in the lower mediastinal region. The grid with ratio 16 is the most efficient scatter rejection technique in all regions except the hilar region. In the hilar region, the most efficient technique is the 40 cm air gap. | |
| 650 | 7 | a MEDICIN OCH HÄLSOVETENSKAPx Klinisk medicinx Radiologi och bildbehandling0 (SwePub)302082 hsv//swe |
| 650 | 7 | a MEDICAL AND HEALTH SCIENCESx Clinical Medicinex Radiology, Nuclear Medicine and Medical Imaging0 (SwePub)302082 hsv//eng |
| 653 | a Radiological physics | |
| 653 | a Radiofysik | |
| 700 | 1 | a Sandborg, Michaelu Östergötlands Läns Landsting,Linköpings universitet,Radiofysik,Hälsouniversitetet,Radiofysikavdelningen4 aut0 (Swepub:liu)micsa02 |
| 700 | 1 | a Dance, David Ru Department of Physics, The Royal Marsden NHS Trust, UK4 aut |
| 700 | 1 | a Hunt, Rogeru Department of Physics, The Royal Marsden NHS Trust, UK4 aut |
| 700 | 1 | a Alm Carlsson, Gudrunu Östergötlands Läns Landsting,Linköpings universitet,Radiofysik,Hälsouniversitetet,Radiofysikavdelningen4 aut0 (Swepub:liu)gudal03 |
| 710 | 2 | a Linköpings universitetb Radiofysik4 org |
| 856 | 4 | u https://liu.diva-portal.org/smash/get/diva2:328214/FULLTEXT01.pdfx primaryx Raw objecty fulltext |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57875 |
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