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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 a 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>]]
→Evaluation: Moved
==Evaluation==
Objectives of the evaluation are mainly:<ref>{{cite web|url=https://emedicine.medscape.com/article/381993-overview|title=Urinary Calculi Imaging|author=J Kevin Smith, Mark E Lockhart, Nicole W Berland and Philip J Kenney|website=Medscape|date=2015-10-27}}</ref>
*Presence of stones within the urinary tract
*Confirm any stone passage
*Assess the stone burden
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File:3mmstone.png|[[Transverse plane|Axial]] CT without contrast, showing a 3-mm stone (marked by an arrow) in the left proximal ureter
File:CT measurement of kidney stone in soft tissue and bone window.jpg|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 a 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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