• 1
    Conrad MR, Janes JO, Dietchy J. Significance of the low level echoes within the gallbladder. Am J Roentgenol 1979; 132: 96772.
  • 2
    Lee SP, Nicholls JF. Nature and composition of biliary sludge. Gastroenterology 1986; 90: 67786.
  • 3
    Allen B, Bernhoft R, Blanckaert N, et al. Sludge is calcium bilirubinate associated with bile stasis. Am J Surg 1981; 141: 516.
  • 4
    Lee SP, Maher K, Nicholls JF. Origin and fate of biliary sludge. Gastroenterology 1988; 94: 1706.
  • 5
    Janowitz P, Kratzer W, Zemmler T, Tudyka J, Wechsler JG. Gallbladder spontaneous course and incidence of complications in patients with stones. Hepatology 1994; 20: 2914.
  • 6
    Ohara N, Schaefer J. Clinical significance of biliary sludge. J Clin Gastroenterol 1990; 12: 2914.
  • 7
    Moschowitz M, Min TC, Gavaler JS. The microscopic examination of bile in patients with biliary pain and negative imaging tests. Am J Gastroenterol 1986; 84: 10129.
  • 8
    Ros E, Navarro S, Bru C, Garcia-Puges A, Valderrama R. Occult microlithiasis in idiopathic acute pancreatitis: prevention of relapses by cholecystectomy or ursodeoxycholic acid therapy. Gastroenterology 1991; 101: 17019.
  • 9
    Lee SP, Nicholls JF, Park HZ. Biliary sludge as a cause of acute pancreatitis. N Engl J Med 1992; 326: 58993.
  • 10
    Grier JF, Cohen SW, Grafton WD, Gholson CF. Acute suppurative cholangitis associated with choledocal sludge. Am J Gastroenterol 1994; 89: 6179.
  • 11
    Chebli JM, Ferrari Junior AP, Silva MR, Borges DR, Atallah AN, Das Neves MM. Biliary microcrystals in idiopathic acute pancreatitis: clue for occult underlying biliary etiology. Arq Gastroenterol 2000; 37: 93101.
  • 12
    Frossard JL, Sosa Valencia L, Amouyal G, Marty O, Hadengue A, Amouyal P. Usefulness of endoscopic ultrasonography in patients with ‘idiopathic’ acute pancreatitis. Am J Gastroenterol 2000; 109: 196200.
  • 13
    Perez-Martin G, Gomez-Cerezo J, Codoceo R, et al. Bilirubinate granules: main pathologic bile component in patients with idiopathic acute pancreatitis. Am J Gastroenterol 1998; 93: 3602.
  • 14
    Lee SP, Nicholls JF, Park HZ. Biliary sludge as a cause of acute pancreatitis. N Engl J Med 1992; 326: 6357.
  • 15
    Ko CW, Sekijima JH, Lee SP. Biliary sludge. Ann Intern Med 1999; 130: 30111.
  • 16
    Seitz K, Merz M. Incidental ultrasound findings of the gallbladder. Schweiz Rundsch Med Prax 1998; 87: 15714.
  • 17
    Wilson SR, Burns PN, Muradali D, Wilson JA, Lai X. Harmonic hepatic US with microbubble contrast agent: initial experience showing improved characterization of haemangioma, hepatocellular carcinoma and metastasis. Radiology 2000; 215: 15361.
  • 18
    Ding H, Kudo M, Maekawa K, Suetomi Y, Minami Y, Onda H. Detection of tumor parenchymal blood flow in hepatic tumors: value of second harmonic imaging with galactose based contrast agent. Hepatol Res 2001; 21: 24251.
  • 19
    Cioni D, Lencioni R, Rossi S, et al. Radiofrequency thermal ablation of hepatocellular carcinoma using contrast enhanced harmonic power Doppler sonography to assess treatment outcome. Am J Roentgenol 2001; 177: 7838.
  • 20
    Kuijer JP, Jansen E, Marcus JT, Van Rossum AC, Hoethaar RM. Improved harmonic phase myocardial strain maps. Magn Res Med 2001; 46: 9939.
  • 21
    Sozzi FB, Poldermans D, Bax JJ, et al. Improved identification of viable myocardium using second harmonic imaging during dobutamine stress echocardiography. Heart 2001; 86: 6728.
  • 22
    Sozzi FB, Poldermans D, Boersma E, et al. Does second harmonic imaging improve left ventricular endocardial border identification at higher heart rates during dobutamine stress echography? J Am Soc Echocardiogr 2000; 13: 101924.
  • 23
    Tranquart F, Grenier N, Eder V, Poucerlot L. Clinical use of ultrasound tissue harmonic imaging. Ultrasound Med Biol 1999; 25: 88993.
  • 24
    Basude R, Wheatley MA. Generation of ultrasoundharmonics in surfactant based ultrasound contrast agents: use and advantages. Ultrasonics 2001; 39: 43744.
  • 25
    Campagnola PI, Millard AC, Terasaki M, Hoppe PE, Malone CJ, Mohler WA. Three dimensional high resolution second harmonic generation imaging of endogenous structural proteins in biological tissues. Biophys J 2002; 82: 493508.
  • 26
    Ono M, Asanuma T, Tanabe K, et al. Improved definition of left atrial thrombus by tissue second harmonic imaging. J Ultrasound Med 1999; 18: 2535.
  • 27
    Swinburn J, Lahiri A, Senior R. Tissue harmonic imaging: a new method for predicting left ventricular thrombus. J Am Soc Echocardiogr 2000; 13: 6801.
  • 28
    Wilkinson LS, Levine TS, Smith D, Chadwick SJ. Biliary sludge: can ultrasound reliably detect the presence of crystals in bile? Eur J Gastroenterol Hepatol 1996; 8: 9991001.
  • 29
    Dahan P, Andant C, Levy P, et al. Prospective evaluation of endoscopic ultrasonography and microscopic examination of duodenal bile in the diagnosis of cholecystolithiasis in 45 patients with normal conventional ultrasonography. Gut 1996; 38: 27781.
  • 30
    Dill JE, Hill S, Berkhouse L, Evans P, Martin D, Palmer ST. Combined endoscopic ultrasound and stimulated biliary drainage in microlithiasis — diagnoses and outcomes. Endoscopy 1995; 27: 4247.
  • 31
    Lee SP, Hayashi A, Kim YS. Biliary sludge: curiosity or culprit? Hepatology 1994; 20: 5235.
  • 32
    Janowitz P, Krayzer W, Zemmler T, Tudyka J, Wechsler JG. Gallbladder sludge: spontaneous course and incidence of complications in patients without stones. Hepatology 1994; 20: 2914.