Dosisreduktion in der Multidetektor-Computertomographie

Several dose-reduction strategies were evaluated in this work by phantom- and patient studies.1. The tube-current-modulation system "CareDose 4D" (Siemens Medical Solutions, Forchheim, Germany) enabled a reduction of effective dosage of 56,1% up to 70,1%, depending on the orientation of the scanogram used, while image noise was elevated in turn.2. By applying a bismuth shielding, the exposure of the thyroid gland could be reduced by 31,3%, while the exposure of the female breast was reduced by 31,9%. By using a cotton spacer image quality could be improved substancially.3. In coronary artery calcium scoring, a low tube current protocoll allowed a dose reduction of 57% without impairement of accuracy or reproducibility compared to the standard protocol. The mass score showed the highest accuracy and reproducibility.4. By using gonad shielding, the testicular dose could be reduced by 87% in abdominal scans without an impairement of image quality.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2007

Author dc:creator

• Thomas, Christoph

Contributors dc:contributor

• Wildberger, Joachim

• info:eu-repo/classification/ddc/610
• Spiral-CT
• Computertomographie
• Effektive Dosis
• Medizin
• Dosisreduktion
• Dosismodulation
• Hodenkapsel
• Bismuthschild
• Niedrigspannungsprotokoll
• Dose reduction
• low voltage protocol
• gonadal shielding

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123934%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:62363