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How Well Do Kidney Stones Show In A Ct Scan Without Contrast
Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more
Yes: In fact, ct scanning without contrast is becoming the gold standard evaluation for kidney stones. Contrast material frequently obscures stones and makes their identification difficult. Stones as small as 1 mm can be detected with unenhanced ct technique. Radiolucent stones which cannot be seen well with plain x-ray technique do show up well with unenhanced ct scan. ...Read more
Would a CT scan without contrast for possible kidney stones also show if there were adrenal tumors? Dr said CT was normal.
yes!: Yes- that is exactly how a ct for renal stones should be performed- with oral or IV contrast. ...Read more
My CT scan shows oval shaped 10.9 mm vs 4.5 mm kidney stone in the upper ureter, with a good orientation. What chances of passing?
Small ones: Smaller than may be 5mm.Get a more detailed answer ›
Can I tell if kidney stone has transited from ureter to bladder by change in symptoms?CT scan shows a 4mm stone 1.5 CM from bladder.
See answer: The only true accurate means of determining whether a ureteral calculus has passed is to retrieve it by straining your urine. The chance of spontaneous passage of a 4mm stone ~50-60%. Onset of symptoms of urinary urgency, frequency, burning, voiding small volumes usually indicates the stone is at the UVJ (ureter meets bladder). The absence or disappearance of pain does not guarantee stone passage. ...Read more
Ultrasound only fair: Ultrasound detected about a quarter of all stones seen on ct. Stones smaller than 4 mm were not well seen on ultrasound. Mean size of stones seen with ultrasound was about 7 mm. Main advantage of the ultrasound is the absence of radiation exposure. If you are of thin build, the ultrasound may be somewhat more sensitive. ...Read moreSee 1 more doctor answer
Hi dr! i want to ask.. is it possible that a kidney stones was seen in ultrasound but can't be seen in ct scan with contrast?
Yes, because: it had probably passed in the meantime. Small stones generally pass. Most important for you is to prevent recurrence of stones. ...Read more
Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more
Seriously- renal stones are the result of postive and negatively charged particles in urine binding together and precipitating as solids- most frequently as calcium- oxalate. This happens most often when the urine is concentrated- ie when you are dehydrated. And trying to pass these stones from the kidney to the bladder is incredibly painful. ...Read more
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