Difference between revisions of "CT of kidney stone disease"

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==Evaluation==
 
==Evaluation==
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[[File:CT measurement of kidney stone in soft tissue and bone window.jpg|thumb|Measurement of a 5.6 mm large kidney stone in soft tissue window (width of 400 HU, center at 50 HU) versus skeletal window (W1800,C400). 145 HU is regarded as an appropriate cutoff to distinguish stone from surrounding tissue.<ref name="LidénThunberg2015">{{cite journal|last1=Lidén|first1=Mats|last2=Thunberg|first2=Per|last3=Broxvall|first3=Mathias|last4=Geijer|first4=Håkan|title=Two- and three-dimensional CT measurements of urinary calculi length and width: a comparative study|journal=Acta Radiologica|volume=56|issue=4|year=2015|pages=487–492|issn=0284-1851|doi=10.1177/0284185114528490}}</ref>]]
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[[File:CT measurement of kidney stone in soft tissue and bone window.jpg|thumb|Measurement of a 5.6 mm large kidney stone in soft tissue window (at left, with width of 400 HU, and center at 50 HU) versus skeletal window (right, W1800,C400). 145 HU is regarded as an appropriate cutoff to distinguish stone from surrounding tissue.<ref name="LidénThunberg2015">{{cite journal|last1=Lidén|first1=Mats|last2=Thunberg|first2=Per|last3=Broxvall|first3=Mathias|last4=Geijer|first4=Håkan|title=Two- and three-dimensional CT measurements of urinary calculi length and width: a comparative study|journal=Acta Radiologica|volume=56|issue=4|year=2015|pages=487–492|issn=0284-1851|doi=10.1177/0284185114528490}}</ref>]]
 
The proper sizing of a stone is most critical at around 5 mm.<ref name="Size" group="note"/>
 
The proper sizing of a stone is most critical at around 5 mm.<ref name="Size" group="note"/>
  

Revision as of 20:08, 29 May 2018

Author: Mikael Häggström [notes 1]

Planning

Evaluation

Measurement of a 5.6 mm large kidney stone in soft tissue window (at left, with width of 400 HU, and center at 50 HU) versus skeletal window (right, W1800,C400). 145 HU is regarded as an appropriate cutoff to distinguish stone from surrounding tissue.[2]

The proper sizing of a stone is most critical at around 5 mm.[note 1]

Notes

  1. ↑ Ureteric stones less than 5 mm in diameter pass spontaneously in up to 98% of cases, while those measuring 5 to 10 in diameter pass spontaneously in less than 53% of cases.
    - Gettman, MT; Segura, JW (2005). "Management of ureteric stones: Issues and controversies ". British Journal of Urology International 95 (Supplement 2): 85–93. doi:10.1111/j.1464-410X.2005.05206.x. PMID 15720341. 

References

  1. ↑ Smith-Bindman, Rebecca; Aubin, Chandra; Bailitz, John; Bengiamin, Rimon N.; Camargo, Carlos A.; Corbo, Jill; Dean, Anthony J.; Goldstein, Ruth B.; et al. (2014). "Ultrasonography versus Computed Tomography for Suspected Nephrolithiasis ". New England Journal of Medicine 371 (12): 1100–1110. doi:10.1056/NEJMoa1404446. ISSN 0028-4793. 
  2. ↑ Lidén, Mats; Thunberg, Per; Broxvall, Mathias; Geijer, Håkan (2015). "Two- and three-dimensional CT measurements of urinary calculi length and width: a comparative study ". Acta Radiologica 56 (4): 487–492. doi:10.1177/0284185114528490. ISSN 0284-1851. 


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