CTU Without and With IV Contrast With urinary tract opacification, CTU confirms the ureteral location of a calculus, distinguishing from stone mimics such as an adjacent phlebolith or vascular calcification. CTU can better confirm the degree of obstruction caused by a ureteral stone and potentially also aid in diagnosing a radiolucent stone that may not be visualized with noncontrast CT and can also detect urothelial masses on the excretory phase. However, there is no relevant literature documenting the additional benefit of additional CTU after an inconclusive CT without IV contrast in the evaluation of stones. MRI Abdomen and Pelvis Without and With IV Contrast There is no relevant literature documenting the additional benefit of MRI without and with IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. MRI Abdomen and Pelvis Without IV Contrast There is no relevant literature documenting the additional benefit of MRI without IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. MRU Without and With IV Contrast There is no relevant literature documenting the additional benefit of MRU without and with IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. However, MRU has been shown in the setting of initial stone detection to be more sensitive than noncontrast CT in the detection of secondary signs of obstruction in the presence of urolithiasis, although this has not been specifically assessed in this clinical scenario [28]. MRU Without IV Contrast There is no relevant literature documenting the additional benefit of MRU without IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. Radiography Abdomen and Pelvis There is no relevant literature documenting the additional benefit of KUB after an inconclusive CT without IV contrast in the evaluation of stones.
Acute Onset Flank Pain Suspicion of Stone Disease Urolithiasis . CTU Without and With IV Contrast With urinary tract opacification, CTU confirms the ureteral location of a calculus, distinguishing from stone mimics such as an adjacent phlebolith or vascular calcification. CTU can better confirm the degree of obstruction caused by a ureteral stone and potentially also aid in diagnosing a radiolucent stone that may not be visualized with noncontrast CT and can also detect urothelial masses on the excretory phase. However, there is no relevant literature documenting the additional benefit of additional CTU after an inconclusive CT without IV contrast in the evaluation of stones. MRI Abdomen and Pelvis Without and With IV Contrast There is no relevant literature documenting the additional benefit of MRI without and with IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. MRI Abdomen and Pelvis Without IV Contrast There is no relevant literature documenting the additional benefit of MRI without IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. MRU Without and With IV Contrast There is no relevant literature documenting the additional benefit of MRU without and with IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. However, MRU has been shown in the setting of initial stone detection to be more sensitive than noncontrast CT in the detection of secondary signs of obstruction in the presence of urolithiasis, although this has not been specifically assessed in this clinical scenario [28]. MRU Without IV Contrast There is no relevant literature documenting the additional benefit of MRU without IV contrast after an inconclusive CT without IV contrast in the evaluation of stones. Radiography Abdomen and Pelvis There is no relevant literature documenting the additional benefit of KUB after an inconclusive CT without IV contrast in the evaluation of stones.