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Effect of thin overlapping reconstruction on the attenuation of small (< or = 3 cm) renal cysts in the nephrographic phase of MDCT: a phantom study

Cited 2 time in Web of Science Cited 1 time in Scopus
Authors
Kim, Sun Ho; Kim, Seung Hyup
Issue Date
2006-12-05
Publisher
The Korean Radiological Society
Citation
Korean J Radiol 2006;7(4):275-80.
Keywords
Contrast MediaIohexol/analogs & derivatives/diagnostic use*Radiographic Image Interpretation, Computer-AssistedKidneyCystComputed tomographyPseudoenhancement
Description
RoMEO에 미등재
Abstract
OBJECTIVE: To evaluate the effect of thin overlapping reconstruction on the attenuation of small (< or =3 cm) renal cysts in the nephrographic phase of multidetector CT (MDCT). MATERIALS AND METHODS: We scanned a phantom kidney containing spheres of various sizes (10, 20, and 30 mm) using both 4- and 16-channel MDCT scanners, and reconstructed images with various slice thickness (T, mm) and intervals (I, mm). The attenuation increase (AI) was measured for each sphere in 240-HU diluted solution of contrast material and compared with the attenuation in 35-HU solution. RESULTS: On the 4-channel MDCT, thin overlapping reconstruction (T/I = 3/1, compared with 5/5) lowered the AI as much as 17 HU in the 10 mm-sphere and 6 HU in the 20 mm-sphere (p < 0.05). Thin slicing alone was also effective; however overlapping alone was not. On the 16-channel MDCT, AI in the 10 mm-sphere was significantly lower than on the 4-channel MDCT with T/I = 5/5 (p < 0.05), however thinner slicing or overlapping did not affect the attenuation significantly in all of the spheres. CONCLUSION: The effect of thin overlapping reconstruction on minimizing falsely elevated attenuation in the nephrographic phase was significant only in cysts < or = 20 mm on the 4-channel MDCT.
ISSN
1229-6929 (Print)
2005-8330 (Electronic)
Language
English
URI
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17143031

http://hdl.handle.net/10371/10004
DOI
https://doi.org/10.3348/kjr.2006.7.4.275
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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