CT and stone fragility.
Informed selection of treatment requires knowledge of the size and composition of a calculus. Spiral CT has a growing role in the detection of calculi, with an overall accuracy in excess of 95%. Moreover, the margin of error in determining stone size does not exceed 3.6%, and stone volume is underestimated by <5%. Pixelograms, the compilation of multiple points of attenuation, may provide clues to stone composition and durility.
Department of Urology, Massachusetts General Hospital, Boston 02214, USA. sdretler@partners.org
S P
SP
Dretler
B A
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Spencer
D002118:Calcium / Q000032:analysis; D002129:Calcium Oxalate / Q000032:analysis; D002130:Calcium Phosphates / Q000032:analysis; D003553:Cystine / Q000032:analysis; D006801:Humans; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014527:Uric Acid / Q000032:analysis; D014545:Urinary Calculi / Q000737:chemistry* / Q000000981:diagnostic imaging* / Q000628:therapy
D002130:Calcium Phosphates; D002129:Calcium Oxalate; D014527:Uric Acid; D003553:Cystine; C494366:calcium phosphate, dibasic, dihydrate; D002118:Calcium