Jokl D H, Tsai N, Kreps S
Department of Ophthalmology, New York Medical College, Valhalla, USA.
Ophthalmology. 1999 Sep;106(9):1841-6. doi: 10.1016/S0161-6420(99)90363-9.
Quantitative computerized tomography (QCT), a scanning method routinely used to classify tissues based on their radio density, was used to detect choroidal calcification.
Case reports.
Two patients with known or suspected choroidal calcium-choroidal osteoma (CO) and pseudoxanthoma elasticum (PXE) and five normal control subjects were assessed.
The CT scan of choroid, B-scan ultrasound, fluorescein angiography.
The QCT scan used to detect the presence of calcium based on a readout greater than 90.
Calcium was detected bilaterally, as predicted, in PXE, and in both eyes of CO, although only one eye had a clinically noted lesion. No control eye gave a scale readout consistent with calcium. No findings suggestive of calcium were noted with B-scan ultrasound or fluorescein angiography in PXE or CO.
The QCT can detect calcium in the choroid when B-scan ultrasonography and CT scan fine sectioning fail to identify calcium despite high clinical suspicion.
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