Low-density stone of the gallbladder on computed tomography

Suzuki, Masayuki; Takashima, Tsutomu; Funaki, Hiromi; Kanno, S; Ushitani, Kenji; Tabuchi, Makoto

doi:10.1007/bf01887609

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Although CT is less sensitive than abdominal sonography in detecting gallstones 11 ) , our data show that five CT patterns can be indentified that have varied chemical compositions. Among the five patterns, gallstones with isodense patterns had the highest cholesterol and lowest calcium content.…”

Section: Discussionmentioning

confidence: 67%

Computed Tomographic Analysis of Gallbladder Stones: Correlation with Chemical Composition and In Vitro Shock-wave Lithotripsy

Kim

Lee

Min

et al. 1991

Korean J Intern Med

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The recent advent of nonsurgical treatment for gallstones reguires accurate in vivo analysis of their chemical composition in order to select the best candidates. As a preliminary work, we undertook an in vitro CT examination of 53 surgically removed gallstones and compared their CT patterns with their chemical composition. Those results were correlated with in vitro lithotripsy of the gallstones. The CT appearances were classified as follows: laminated (43%), dense (32%), rimmed (11%), isodense (8%) and faint (6%).The dense pattern contained a high calcium content. As the CT density increased, the calcium content increased, but the cholesterol content decreased proportionally. The number of shock waves needed to break down a gallstone less than 2 mm in size increased with stone volume and the cholesterol content increased but did not have any correlation with the calcium content level.As a result we found the CT examination to be a very sensitive method in detecting small amounts of calcium content in gallstones and the CT pattern and density of the gallstones were well correlated with their chemical composition, therefore in vivo CT examinations for ESWL candidats are desirable.

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Section: Discussionmentioning

confidence: 67%

Computed Tomographic Analysis of Gallbladder Stones: Correlation with Chemical Composition and In Vitro Shock-wave Lithotripsy

Kim

Lee

Min

et al. 1991

Korean J Intern Med

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“…Due to the high density resolution, even slight amounts of calcium may reveal gallstones. Pure cholesterol stones have negative absorption values and may thus be displayed [6,15]. However, most gallstones are mixed in their composition and their densities often are within the range of those of bile.…”

Section: Discussionmentioning

confidence: 99%

Appearance of gas-containing gallstones on sonography and computed tomography

Becker

Vock

1984

Gastrointest Radiol

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The diagnostic features of gas-containing gallstones on sonography and CT in 6 patients and the in vitro findings in 30 gas-containing gallstones are analyzed. On plain abdominal radiography, the stellate appearance of gas collections, though infrequent, is quite characteristic. On real-time sonography, gas-containing calculi can be observed to float within bile. Furthermore, larger gas collections within gallstones can be identified since they produce high-level echoes in the acoustic shadow of the stone, probably due to sound reverberation. These phenomena, although interesting, do not interfere with the high accuracy of sonography in the detection of gallstones. CT detects gallstones when their density differs from that of bile. Due to high-density resolution, even minute gas collections are displayed and can reveal gallstones with an isodense matrix. However, under routine abdominal scanning conditions (8 mm collimation), the gas collections often appear round or ovoid, because spatial resolution is inferior to that on plain radiography. This fact should be considered in the differential diagnosis of gas collections in the gallbladder region found on CT.

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In vivo analysis of gallstone composition by computed tomography

Bova

Schwesinger²,

Kurtin

1992

Gastrointest Radiol

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In vivo computed tomography (CT) of the gallbladder was performed in 39 patients with known cholelithiasis and subsequently correlated with the chemical composition of the retrieved gallstones. Six CT patterns were identified: pattern 1, negative defect within the bile; pattern 2, nonvisualization of calculi; pattern 3, faint homogeneous central calcification; pattern 4A, thin rim of calcification; pattern 4B, thick rim of calcification; pattern 5, dense homogeneous central calcification. These CT patterns correlated well with cholesterol (p = 0.05) and calcium bilirubinate (p = 0.01) contents and CT attenuation values (p less than 0.001). The most common pattern was CT pattern 2 (56.5%). The authors conclude that there is good correlation of the CT pattern with gallstone composition. This simple approach can be used to help identify patients for therapy with chemical dissolution and/or lithotripsy.

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Low-density stone of the gallbladder on computed tomography

Abstract: Six cases of low-density gallstones with computed tomographic appearances are reported. On abdominal CT study, a gallstone may be identifiable not only as a high-density area but also as a lowdensity one.

Cited by 5 publications

References 9 publications

Computed Tomographic Analysis of Gallbladder Stones: Correlation with Chemical Composition and In Vitro Shock-wave Lithotripsy

Computed Tomographic Analysis of Gallbladder Stones: Correlation with Chemical Composition and In Vitro Shock-wave Lithotripsy

Appearance of gas-containing gallstones on sonography and computed tomography

In vivo analysis of gallstone composition by computed tomography

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