CT measurement of kidney stone in soft tissue and bone window.jpg
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CT measurement of kidney stone in soft tissue and bone window, CT images of urinary stone disease, Mikael Häggström/Computed tomography images, Computerized Tomography Magnified Bone Windows are Superior to Standard Soft Tissue Windows for Accurate Measurement of Stone Size: An In Vitro and Clinical Study
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CT measurement of kidney stone in soft tissue and bone window, Measurement of a kidney stone in a CT window for soft tissue (width of 400 HU, center at 50 HU) and bone window (W1800,C400). The kidney stone was directly measured outside the body to be 5.6 mm, and is here seen after placement in a potato (whose CT attenuation is regarded as comparable to that of a kidney1), in turn placed in a human-shaped water tank. The lines in the images show the same measurement of 5.6 mm. Even without knowing this reference point, the mean maximal value made by 6 investigators in the CT image (5.4 mm) was only 0.2 mm off the direct measure outside the body when using a HU cutoff of 150.

===Reference===
1. {{cite journal|last1=Eisner|first1=Brian H.|last2=Kambadakone|first2=Avinash|last3=Monga|first3=Manoj|last4=Anderson|first4=James K.|last5=Thoreson|first5=Andrew A.|last6=Lee|first6=Hang|last7=Dretler|first7=Stephen P.|last8=Sahani|first8=Dushyant V.|title=Computerized Tomography Magnified Bone Windows are Superior to Standard Soft Tissue Windows for Accurate Measurement of Stone Size: An In Vitro and Clinical Study|journal=The Journal of Urology|volume=181|issue=4|year=2009|pages=1710–1715|issn=00225347|doi=10.1016/j.juro.2008.11.116
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軟部組織と骨窓における腎臓石のCT測定、尿路結石病CT画像、ミカエル・ヘグストローム/Computed断層撮影画像、コンピューター化された断層撮影 骨の強化 Windowsは標準ソフト組織の優れた品質 石の大きさ測定のためのWindows: ビトロと臨床研究
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軟部組織と骨窓の腎臓石のCT測定、軟部組織のCT窓の腎臓石の測定(幅400HU、中心は50HU)、骨窓(W1800,C400)腎臓石は体外で直接測定すると5.6 mmであり、ジャガイモの配置後に見られます。画像内の線は5.6 mmの同じ測定値を示している。この基準点を知らずにしても、CT画像の6人の研究者が行った平均最大値は、150のHUカットオフを使用した場合、体外の直接測定から0.2 mmしか離れていなかった。 ==参照=== 1. {{cite journal|last1=Eisner|first1=Brian H. |last2=Kombadakone|first2=Avinash|last3=Monga|first3=Manoj|last4=Anderson|first4=James K.|last5=Thoreson|first5=Andrew A.|
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