الفهرس 
UROLITHIASISOnly 14 pages are availabe for public view
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Abstract
This trial was done on 100 patients presented with urolithiasis presented to urology department in Ain Shams University hospitals for whom endoscopic or surgical intervention was arranged.
The aim of this work was to compare low-dose CT with standard-dose unenhanced CT for the detection of ureteral and renal calculi of various sizes.
Patients underwent SDCT (120 mA) and LDCT (30 mA) at the same session and the resultant images were available for reading on a single picture archiving and communication system workstation used for clinical CT reviews.
CT stone protocol imaging was performed using a 16-multidetector computerized tomography scanner (GE LightSpeed® 16) without intravenous or oral contrast material. All patients underwent scanning in the supine position from the superior aspect of the kidneys to the inferior aspect of the symphysis pubis.
The scans were reviewed by 2 consultant urologists and 1 radio diagnosis consultant in a blinded manner.
Regarding stone detection, Low dose CTUT sensitivity was 96.15% regarding detection of urinary tract stones. (P-value 0.101)
Regarding stone size detection, Low dose CTUT had a sensitivity of 95.45% regarding detection of urinary tract stones (P-value 0.015).
Regarding detection of backpressure changes the sensitivity of LDCT was 97.3%. (P-value 0.922)
In our study there were no difference between standard dose and low dose protocols in detection of other pathologies such as appendicitis and inflammatory bowel disease (sensitivity was 100% and PPV was 100%). (P-value 1.0)
In obese patients, our study concluded that LDCT sensitivity in detection of stones was 89.1 %.( P-value 0.548)