| Autor: |
Purdom RC, Thomas SR, Kereiakes JG, Spitz HB, Goldenberg NJ, Krugh KB |
| Jazyk: |
angličtina |
| Zdroj: |
Radiology [Radiology] 1980 Sep; Vol. 136 (3), pp. 729-32. |
| DOI: |
10.1148/radiology.136.3.7403555 |
| Abstrakt: |
The authors show that the intrinsic ultrasonic attenuation of a gallstone is an important factor in determining the degree of shadowing. B scans in vivo and in vitro demonstrated that stones with higher attenuation also show the most shadowing. In addition, attenuation can be correlated with physical structure: more highly attenuating stones tend to have the largest percentage of crystalline material, a larger average crystal size, and a more rigid structure. The authors recommend that higher-frequency transducers be used where possible if nonshadowing structures are seen in the gallbladder. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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