Cirrhosis echocardiography or ultrasound: Difference between revisions

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==Overview==
==Overview==
On [[ultrasound|ultrasonography]], changes in the liver contour and increased nodularity may be evident. The echo texture may appear coarse along with an increase in echogenecity from focal fatty changes and irregular appearing areas. USG may also be used to screen for [[hepatocellular carcinoma]], [[portal hypertension]] and [[Budd-Chiari syndrome]].
On [[ultrasound|ultrasonography]], changes in the [[liver]] contour and increased [[Nodule (medicine)|nodularity]] may be evident. The echo texture may appear coarse along with an increase in echogenecity from focal fatty changes and irregular appearing areas. [[Medical ultrasonography|USG]] may also be used to screen for [[hepatocellular carcinoma]], [[portal hypertension]] and [[Budd-Chiari syndrome]].


==Echocardiography==
==Echocardiography==
*[[Echocardiography|Echocardiograms]] may be helpful in the measurement of [[ejection fraction]] and identification of [[ischemia|ischemic]] and [[Hypokinesia|hypokinetic]] areas of the [[ventricle (heart)|ventricles]]. This is useful in establishing a diagnosis of [[congestive cardiac failure]] as a cause of liver cirrhosis.
*[[Echocardiography|Echocardiograms]] may be helpful in the measurement of [[ejection fraction]] and identification of [[ischemia|ischemic]] and [[Hypokinesia|hypokinetic]] areas of the [[ventricle (heart)|ventricles]]. This is useful in establishing a diagnosis of [[congestive cardiac failure]] as a cause of liver cirrhosis.
*Contrast echocardiography is a useful diagnostic test for [[hepatopulmonary syndrome]]:
*[[Radiocontrast|Contrast]] [[echocardiography]] is a useful diagnostic test for [[hepatopulmonary syndrome]]:
**Intravenous microbubbles (> 10 micrometers in diameter) from agitated [[normal saline]] that are normally obstructed by [[Lung|pulmonary]] [[Capillary|capillaries]] (normally <8 to 15 micrometers) rapidly transit the [[lung]] and appear in the [[left atrium]] of the heart within 7 heart beats.
**Intravenous microbubbles (> 10 micrometers in diameter) from agitated [[normal saline]] that are normally obstructed by [[Lung|pulmonary]] [[Capillary|capillaries]] (normally <8 to 15 micrometers) rapidly transit the [[lung]] and appear in the [[left atrium]] of the heart within 7 heart beats.
**Intravenous [[technetium]]-99m–labeled [[albumin]] may transit the [[Lung|lungs]] and appear in the [[kidney]] and [[brain]].
**Intravenous [[technetium]]-99m–labeled [[albumin]] may transit the [[Lung|lungs]] and appear in the [[kidney]] and [[brain]].
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==Transient Elastography==
==Transient Elastography==
* Transient elastography and the acoustic radiation force impulse (ARFI) technique are well-established methods for the staging of fibrosis in various liver diseases: <ref name="pmid20581229">{{cite journal |vauthors=Castera L, Pinzani M |title=Biopsy and non-invasive methods for the diagnosis of liver fibrosis: does it take two to tango? |journal=Gut |volume=59 |issue=7 |pages=861–6 |year=2010 |pmid=20581229 |doi=10.1136/gut.2010.214650 |url=}}</ref><ref name="pmid22239521">{{cite journal |vauthors=Friedrich-Rust M, Nierhoff J, Lupsor M, Sporea I, Fierbinteanu-Braticevici C, Strobel D, Takahashi H, Yoneda M, Suda T, Zeuzem S, Herrmann E |title=Performance of Acoustic Radiation Force Impulse imaging for the staging of liver fibrosis: a pooled meta-analysis |journal=J. Viral Hepat. |volume=19 |issue=2 |pages=e212–9 |year=2012 |pmid=22239521 |doi=10.1111/j.1365-2893.2011.01537.x |url=}}</ref><ref name="pmid18395077">{{cite journal |vauthors=Friedrich-Rust M, Ong MF, Martens S, Sarrazin C, Bojunga J, Zeuzem S, Herrmann E |title=Performance of transient elastography for the staging of liver fibrosis: a meta-analysis |journal=Gastroenterology |volume=134 |issue=4 |pages=960–74 |year=2008 |pmid=18395077 |doi=10.1053/j.gastro.2008.01.034 |url=}}</ref><ref name="pmid15690481">{{cite journal |vauthors=Ziol M, Handra-Luca A, Kettaneh A, Christidis C, Mal F, Kazemi F, de Lédinghen V, Marcellin P, Dhumeaux D, Trinchet JC, Beaugrand M |title=Noninvasive assessment of liver fibrosis by measurement of stiffness in patients with chronic hepatitis C |journal=Hepatology |volume=41 |issue=1 |pages=48–54 |year=2005 |pmid=15690481 |doi=10.1002/hep.20506 |url=}}</ref><ref name="pmid14698338">{{cite journal |vauthors=Sandrin L, Fourquet B, Hasquenoph JM, Yon S, Fournier C, Mal F, Christidis C, Ziol M, Poulet B, Kazemi F, Beaugrand M, Palau R |title=Transient elastography: a new noninvasive method for assessment of hepatic fibrosis |journal=Ultrasound Med Biol |volume=29 |issue=12 |pages=1705–13 |year=2003 |pmid=14698338 |doi= |url=}}</ref><ref name="pmid23558397">{{cite journal |vauthors=Bamber J, Cosgrove D, Dietrich CF, Fromageau J, Bojunga J, Calliada F, Cantisani V, Correas JM, D'Onofrio M, Drakonaki EE, Fink M, Friedrich-Rust M, Gilja OH, Havre RF, Jenssen C, Klauser AS, Ohlinger R, Saftoiu A, Schaefer F, Sporea I, Piscaglia F |title=EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 1: Basic principles and technology |journal=Ultraschall Med |volume=34 |issue=2 |pages=169–84 |year=2013 |pmid=23558397 |doi=10.1055/s-0033-1335205 |url=}}</ref><ref name="pmid25911335">{{cite journal |vauthors= |title=EASL-ALEH Clinical Practice Guidelines: Non-invasive tests for evaluation of liver disease severity and prognosis |journal=J. Hepatol. |volume=63 |issue=1 |pages=237–64 |year=2015 |pmid=25911335 |doi=10.1016/j.jhep.2015.04.006 |url=}}</ref><ref name="pmid21205132">{{cite journal |vauthors=Castera L, Bedossa P |title=How to assess liver fibrosis in chronic hepatitis C: serum markers or transient elastography vs. liver biopsy? |journal=Liver Int. |volume=31 Suppl 1 |issue= |pages=13–7 |year=2011 |pmid=21205132 |doi=10.1111/j.1478-3231.2010.02380.x |url=}}</ref><ref name="pmid23732714">{{cite journal |vauthors=Chou R, Wasson N |title=Blood tests to diagnose fibrosis or cirrhosis in patients with chronic hepatitis C virus infection: a systematic review |journal=Ann. Intern. Med. |volume=158 |issue=11 |pages=807–20 |year=2013 |pmid=23732714 |doi=10.7326/0003-4819-158-11-201306040-00005 |url=}}</ref><ref name="pmid26779260">{{cite journal |vauthors=Khallafi H, Qureshi K |title=Imaging Based Methods of Liver Fibrosis Assessment in Viral Hepatitis: A Practical Approach |journal=Interdiscip Perspect Infect Dis |volume=2015 |issue= |pages=809289 |year=2015 |pmid=26779260 |pmc=4686715 |doi=10.1155/2015/809289 |url=}}</ref><ref name="pmid23954643">{{cite journal |vauthors=Singh S, Fujii LL, Murad MH, Wang Z, Asrani SK, Ehman RL, Kamath PS, Talwalkar JA |title=Liver stiffness is associated with risk of decompensation, liver cancer, and death in patients with chronic liver diseases: a systematic review and meta-analysis |journal=Clin. Gastroenterol. Hepatol. |volume=11 |issue=12 |pages=1573–84.e1–2; quiz e88–9 |year=2013 |pmid=23954643 |pmc=3900882 |doi=10.1016/j.cgh.2013.07.034 |url=}}</ref> 
* Transient elastography and the Acoustic Radiation Force Impulse (ARFI) technique are well-established methods for the staging of [[fibrosis]] in various [[liver]] diseases: <ref name="pmid20581229">{{cite journal |vauthors=Castera L, Pinzani M |title=Biopsy and non-invasive methods for the diagnosis of liver fibrosis: does it take two to tango? |journal=Gut |volume=59 |issue=7 |pages=861–6 |year=2010 |pmid=20581229 |doi=10.1136/gut.2010.214650 |url=}}</ref><ref name="pmid22239521">{{cite journal |vauthors=Friedrich-Rust M, Nierhoff J, Lupsor M, Sporea I, Fierbinteanu-Braticevici C, Strobel D, Takahashi H, Yoneda M, Suda T, Zeuzem S, Herrmann E |title=Performance of Acoustic Radiation Force Impulse imaging for the staging of liver fibrosis: a pooled meta-analysis |journal=J. Viral Hepat. |volume=19 |issue=2 |pages=e212–9 |year=2012 |pmid=22239521 |doi=10.1111/j.1365-2893.2011.01537.x |url=}}</ref><ref name="pmid18395077">{{cite journal |vauthors=Friedrich-Rust M, Ong MF, Martens S, Sarrazin C, Bojunga J, Zeuzem S, Herrmann E |title=Performance of transient elastography for the staging of liver fibrosis: a meta-analysis |journal=Gastroenterology |volume=134 |issue=4 |pages=960–74 |year=2008 |pmid=18395077 |doi=10.1053/j.gastro.2008.01.034 |url=}}</ref><ref name="pmid15690481">{{cite journal |vauthors=Ziol M, Handra-Luca A, Kettaneh A, Christidis C, Mal F, Kazemi F, de Lédinghen V, Marcellin P, Dhumeaux D, Trinchet JC, Beaugrand M |title=Noninvasive assessment of liver fibrosis by measurement of stiffness in patients with chronic hepatitis C |journal=Hepatology |volume=41 |issue=1 |pages=48–54 |year=2005 |pmid=15690481 |doi=10.1002/hep.20506 |url=}}</ref><ref name="pmid14698338">{{cite journal |vauthors=Sandrin L, Fourquet B, Hasquenoph JM, Yon S, Fournier C, Mal F, Christidis C, Ziol M, Poulet B, Kazemi F, Beaugrand M, Palau R |title=Transient elastography: a new noninvasive method for assessment of hepatic fibrosis |journal=Ultrasound Med Biol |volume=29 |issue=12 |pages=1705–13 |year=2003 |pmid=14698338 |doi= |url=}}</ref><ref name="pmid23558397">{{cite journal |vauthors=Bamber J, Cosgrove D, Dietrich CF, Fromageau J, Bojunga J, Calliada F, Cantisani V, Correas JM, D'Onofrio M, Drakonaki EE, Fink M, Friedrich-Rust M, Gilja OH, Havre RF, Jenssen C, Klauser AS, Ohlinger R, Saftoiu A, Schaefer F, Sporea I, Piscaglia F |title=EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 1: Basic principles and technology |journal=Ultraschall Med |volume=34 |issue=2 |pages=169–84 |year=2013 |pmid=23558397 |doi=10.1055/s-0033-1335205 |url=}}</ref><ref name="pmid25911335">{{cite journal |vauthors= |title=EASL-ALEH Clinical Practice Guidelines: Non-invasive tests for evaluation of liver disease severity and prognosis |journal=J. Hepatol. |volume=63 |issue=1 |pages=237–64 |year=2015 |pmid=25911335 |doi=10.1016/j.jhep.2015.04.006 |url=}}</ref><ref name="pmid21205132">{{cite journal |vauthors=Castera L, Bedossa P |title=How to assess liver fibrosis in chronic hepatitis C: serum markers or transient elastography vs. liver biopsy? |journal=Liver Int. |volume=31 Suppl 1 |issue= |pages=13–7 |year=2011 |pmid=21205132 |doi=10.1111/j.1478-3231.2010.02380.x |url=}}</ref><ref name="pmid23732714">{{cite journal |vauthors=Chou R, Wasson N |title=Blood tests to diagnose fibrosis or cirrhosis in patients with chronic hepatitis C virus infection: a systematic review |journal=Ann. Intern. Med. |volume=158 |issue=11 |pages=807–20 |year=2013 |pmid=23732714 |doi=10.7326/0003-4819-158-11-201306040-00005 |url=}}</ref><ref name="pmid26779260">{{cite journal |vauthors=Khallafi H, Qureshi K |title=Imaging Based Methods of Liver Fibrosis Assessment in Viral Hepatitis: A Practical Approach |journal=Interdiscip Perspect Infect Dis |volume=2015 |issue= |pages=809289 |year=2015 |pmid=26779260 |pmc=4686715 |doi=10.1155/2015/809289 |url=}}</ref><ref name="pmid23954643">{{cite journal |vauthors=Singh S, Fujii LL, Murad MH, Wang Z, Asrani SK, Ehman RL, Kamath PS, Talwalkar JA |title=Liver stiffness is associated with risk of decompensation, liver cancer, and death in patients with chronic liver diseases: a systematic review and meta-analysis |journal=Clin. Gastroenterol. Hepatol. |volume=11 |issue=12 |pages=1573–84.e1–2; quiz e88–9 |year=2013 |pmid=23954643 |pmc=3900882 |doi=10.1016/j.cgh.2013.07.034 |url=}}</ref> 
* The '''FibroScan (transient elastography)''' uses elastic waves to determine liver stiffness which theoretically may be converted into a liver score.
* The '''FibroScan (transient elastography)''' uses elastic waves to determine [[liver]] stiffness which theoretically may be converted into a liver score.
* The FibroScan produces an ultrasound image of the liver (from 20-80mm) along with a pressure reading (in kPa).   
* The FibroScan produces an ultrasound image of the [[liver]] (from 20-80mm) along with a pressure reading (in kPa).   
* Transient elastography is much faster than a biopsy (usually lasts 2.5-5 minutes) and is completely painless.  
* Transient elastography is much faster than a [[biopsy]] (usually lasts 2.5-5 minutes) and is completely painless.  
* Findings on transient elastography may show reasonable correlation with the severity of cirrhosis:<ref>{{cite journal |author=Foucher J, Chanteloup E, Vergniol J, ''et al'' |title=Diagnosis of cirrhosis by transient elastography (FibroScan): a prospective study |journal=Gut |volume=55|issue=3 |pages=403-8 |year=2006 |pmid=16020491 |doi=10.1136/gut.2005.069153}}</ref><ref name="pmid22733854">{{cite journal |author=Xie L, Chen X, Guo Q, Dong Y, Guang Y, Zhang X |title=Real-time elastography for diagnosis of liver fibrosis in chronic hepatitis B |journal=[[Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine]] |volume=31 |issue=7 |pages=1053–60 |year=2012|pmid=22733854 |doi= |url=}}</ref>  
* Findings on transient elastography may show reasonable correlation with the severity of cirrhosis:<ref>{{cite journal |author=Foucher J, Chanteloup E, Vergniol J, ''et al'' |title=Diagnosis of cirrhosis by transient elastography (FibroScan): a prospective study |journal=Gut |volume=55|issue=3 |pages=403-8 |year=2006 |pmid=16020491 |doi=10.1136/gut.2005.069153}}</ref><ref name="pmid22733854">{{cite journal |author=Xie L, Chen X, Guo Q, Dong Y, Guang Y, Zhang X |title=Real-time elastography for diagnosis of liver fibrosis in chronic hepatitis B |journal=[[Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine]] |volume=31 |issue=7 |pages=1053–60 |year=2012|pmid=22733854 |doi= |url=}}</ref>  
** Increasing scarring of the liver is associated with increasing "stiffness" of the tissue.
** Increasing [[Scar|scarring]] of the [[liver]] is associated with increasing "stiffness" of the [[Tissue (biology)|tissue]].


==References==
==References==

Revision as of 20:37, 13 December 2017

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Sudarshana Datta, MD [2]

Overview

On ultrasonography, changes in the liver contour and increased nodularity may be evident. The echo texture may appear coarse along with an increase in echogenecity from focal fatty changes and irregular appearing areas. USG may also be used to screen for hepatocellular carcinoma, portal hypertension and Budd-Chiari syndrome.

Echocardiography

Ultrasound

  • Ultrasonography may be routinely performed during the evaluation of cirrhosis.
  • USG is considered as the first-line investigation of choice due to the following advantages:

{{#ev:youtube|AYb9NrZoSLs}}

Transient Elastography

  • Transient elastography and the Acoustic Radiation Force Impulse (ARFI) technique are well-established methods for the staging of fibrosis in various liver diseases: [15][16][17][18][19][20][21][22][23][24][25] 
  • The FibroScan (transient elastography) uses elastic waves to determine liver stiffness which theoretically may be converted into a liver score.
  • The FibroScan produces an ultrasound image of the liver (from 20-80mm) along with a pressure reading (in kPa).
  • Transient elastography is much faster than a biopsy (usually lasts 2.5-5 minutes) and is completely painless.
  • Findings on transient elastography may show reasonable correlation with the severity of cirrhosis:[26][27]

References

  1. ↑ Udell JA, Wang CS, Tinmouth J, FitzGerald JM, Ayas NT, Simel DL, Schulzer M, Mak E, Yoshida EM (2012). "Does this patient with liver disease have cirrhosis?". JAMA. 307 (8): 832–42. doi:10.1001/jama.2012.186. PMID 22357834.
  2. ↑ Becker CD, Scheidegger J, Marincek B (1986). "Hepatic vein occlusion: morphologic features on computed tomography and ultrasonography". Gastrointest Radiol. 11 (4): 305–11. PMID 3533689.
  3. ↑ Di Lelio A, Cestari C, Lomazzi A, Beretta L (1989). "Cirrhosis: diagnosis with sonographic study of the liver surface". Radiology. 172 (2): 389–92. doi:10.1148/radiology.172.2.2526349. PMID 2526349.
  4. ↑ Sanford NL, Walsh P, Matis C, Baddeley H, Powell LW (1985). "Is ultrasonography useful in the assessment of diffuse parenchymal liver disease?". Gastroenterology. 89 (1): 186–91. PMID 3891495.
  5. ↑ Giorgio A, Amoroso P, Lettieri G, Fico P, de Stefano G, Finelli L, Scala V, Tarantino L, Pierri P, Pesce G (1986). "Cirrhosis: value of caudate to right lobe ratio in diagnosis with US". Radiology. 161 (2): 443–5. doi:10.1148/radiology.161.2.3532188. PMID 3532188.
  6. ↑ Simonovský V (1999). "The diagnosis of cirrhosis by high resolution ultrasound of the liver surface". Br J Radiol. 72 (853): 29–34. doi:10.1259/bjr.72.853.10341686. PMID 10341686.
  7. ↑ Trinchet JC, Chaffaut C, Bourcier V, Degos F, Henrion J, Fontaine H, Roulot D, Mallat A, Hillaire S, Cales P, Ollivier I, Vinel JP, Mathurin P, Bronowicki JP, Vilgrain V, N'Kontchou G, Beaugrand M, Chevret S (2011). "Ultrasonographic surveillance of hepatocellular carcinoma in cirrhosis: a randomized trial comparing 3- and 6-month periodicities". Hepatology. 54 (6): 1987–97. doi:10.1002/hep.24545. PMID 22144108.
  8. ↑ "EASL-EORTC clinical practice guidelines: management of hepatocellular carcinoma". J. Hepatol. 56 (4): 908–43. 2012. doi:10.1016/j.jhep.2011.12.001. PMID 22424438.
  9. ↑ Di Lelio A, Cestari C, Lomazzi A, Beretta L (1989). "Cirrhosis: diagnosis with sonographic study of the liver surface". Radiology. 172 (2): 389–92. doi:10.1148/radiology.172.2.2526349. PMID 2526349.
  10. ↑ Martínez-Noguera A, Montserrat E, Torrubia S, Villalba J (2002). "Doppler in hepatic cirrhosis and chronic hepatitis". Semin. Ultrasound CT MR. 23 (1): 19–36. PMID 11866220.
  11. ↑ Tchelepi H, Ralls PW, Radin R, Grant E (2002). "Sonography of diffuse liver disease". J Ultrasound Med. 21 (9): 1023–32, quiz 1033–4. PMID 12216750.
  12. ↑ Awaya H, Mitchell DG, Kamishima T, Holland G, Ito K, Matsumoto T (2002). "Cirrhosis: modified caudate-right lobe ratio". Radiology. 224 (3): 769–74. doi:10.1148/radiol.2243011495. PMID 12202712.
  13. ↑ Albrecht T, Blomley MJ, Cosgrove DO, Taylor-Robinson SD, Jayaram V, Eckersley R, Urbank A, Butler-Barnes J, Patel N (1999). "Non-invasive diagnosis of hepatic cirrhosis by transit-time analysis of an ultrasound contrast agent". Lancet. 353 (9164): 1579–83. doi:10.1016/S0140-6736(98)06373-9. PMID 10334257.
  14. ↑ Zwiebel WJ (1995). "Sonographic diagnosis of hepatic vascular disorders". Semin. Ultrasound CT MR. 16 (1): 34–48. PMID 7718281.
  15. ↑ Castera L, Pinzani M (2010). "Biopsy and non-invasive methods for the diagnosis of liver fibrosis: does it take two to tango?". Gut. 59 (7): 861–6. doi:10.1136/gut.2010.214650. PMID 20581229.
  16. ↑ Friedrich-Rust M, Nierhoff J, Lupsor M, Sporea I, Fierbinteanu-Braticevici C, Strobel D, Takahashi H, Yoneda M, Suda T, Zeuzem S, Herrmann E (2012). "Performance of Acoustic Radiation Force Impulse imaging for the staging of liver fibrosis: a pooled meta-analysis". J. Viral Hepat. 19 (2): e212–9. doi:10.1111/j.1365-2893.2011.01537.x. PMID 22239521.
  17. ↑ Friedrich-Rust M, Ong MF, Martens S, Sarrazin C, Bojunga J, Zeuzem S, Herrmann E (2008). "Performance of transient elastography for the staging of liver fibrosis: a meta-analysis". Gastroenterology. 134 (4): 960–74. doi:10.1053/j.gastro.2008.01.034. PMID 18395077.
  18. ↑ Ziol M, Handra-Luca A, Kettaneh A, Christidis C, Mal F, Kazemi F, de Lédinghen V, Marcellin P, Dhumeaux D, Trinchet JC, Beaugrand M (2005). "Noninvasive assessment of liver fibrosis by measurement of stiffness in patients with chronic hepatitis C". Hepatology. 41 (1): 48–54. doi:10.1002/hep.20506. PMID 15690481.
  19. ↑ Sandrin L, Fourquet B, Hasquenoph JM, Yon S, Fournier C, Mal F, Christidis C, Ziol M, Poulet B, Kazemi F, Beaugrand M, Palau R (2003). "Transient elastography: a new noninvasive method for assessment of hepatic fibrosis". Ultrasound Med Biol. 29 (12): 1705–13. PMID 14698338.
  20. ↑ Bamber J, Cosgrove D, Dietrich CF, Fromageau J, Bojunga J, Calliada F, Cantisani V, Correas JM, D'Onofrio M, Drakonaki EE, Fink M, Friedrich-Rust M, Gilja OH, Havre RF, Jenssen C, Klauser AS, Ohlinger R, Saftoiu A, Schaefer F, Sporea I, Piscaglia F (2013). "EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 1: Basic principles and technology". Ultraschall Med. 34 (2): 169–84. doi:10.1055/s-0033-1335205. PMID 23558397.
  21. ↑ "EASL-ALEH Clinical Practice Guidelines: Non-invasive tests for evaluation of liver disease severity and prognosis". J. Hepatol. 63 (1): 237–64. 2015. doi:10.1016/j.jhep.2015.04.006. PMID 25911335.
  22. ↑ Castera L, Bedossa P (2011). "How to assess liver fibrosis in chronic hepatitis C: serum markers or transient elastography vs. liver biopsy?". Liver Int. 31 Suppl 1: 13–7. doi:10.1111/j.1478-3231.2010.02380.x. PMID 21205132.
  23. ↑ Chou R, Wasson N (2013). "Blood tests to diagnose fibrosis or cirrhosis in patients with chronic hepatitis C virus infection: a systematic review". Ann. Intern. Med. 158 (11): 807–20. doi:10.7326/0003-4819-158-11-201306040-00005. PMID 23732714.
  24. ↑ Khallafi H, Qureshi K (2015). "Imaging Based Methods of Liver Fibrosis Assessment in Viral Hepatitis: A Practical Approach". Interdiscip Perspect Infect Dis. 2015: 809289. doi:10.1155/2015/809289. PMC 4686715. PMID 26779260.
  25. ↑ Singh S, Fujii LL, Murad MH, Wang Z, Asrani SK, Ehman RL, Kamath PS, Talwalkar JA (2013). "Liver stiffness is associated with risk of decompensation, liver cancer, and death in patients with chronic liver diseases: a systematic review and meta-analysis". Clin. Gastroenterol. Hepatol. 11 (12): 1573–84.e1–2, quiz e88–9. doi:10.1016/j.cgh.2013.07.034. PMC 3900882. PMID 23954643.
  26. ↑ Foucher J, Chanteloup E, Vergniol J; et al. (2006). "Diagnosis of cirrhosis by transient elastography (FibroScan): a prospective study". Gut. 55 (3): 403–8. doi:10.1136/gut.2005.069153. PMID 16020491.
  27. ↑ Xie L, Chen X, Guo Q, Dong Y, Guang Y, Zhang X (2012). "Real-time elastography for diagnosis of liver fibrosis in chronic hepatitis B". Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine. 31 (7): 1053–60. PMID 22733854.

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