Radiolucent Kidney Stones On X Ray. Here we used the terms radio opaque and radiolucent loosely to describe stones that are either visible or invisible to the naked eye on plain radiograph. Other advantages of renal ultrasonography include its low cost and absence of radiation exposure.
Ultrasound imaging is useful for detecting stones in situations where x rays or ct scans are discouraged such as in children or pregnant women. In swl smith et al. Radiolucent stones mainly uric acid pose a challenge as its localization cannot be done with standard x ray.
Medication protease inhibitor indinavir stones.
According to these latter authors only if there is an admixture of inorganic substances are the stones demonstrable roentgenographically. Dec 09 2018 kidney stones are commonly made of calcium salts such calcium oxalate and calcium phosphate. Radiolucent and usually undetectable on non contrast ct 5. Kerr and gillies 1 stated that pure cystine stones are not opaque to roentgen rays and michels and engel 2 made a similar observation.