Accuracy of CT in Detecting Site and Size of Renal Stone Compared with Ultrasound

Abstract

50 patients (36 men and 14 women) with different ages and all of them affected by renal stone. All patients were selected from military Hospital – CT Department. The objective of this study is to determine the percentage of CT in detecting site and size of renal stone compared with ultra sound. And to measure the renal stone size in both male and female. Also to identify the role of CT in diagnosis of renal stone size and site. The CT images were conducted using (TOSHIBA aquilion 64 slices) CT scanner. The scan parameters are (3mm slice, 120 kvp and 225 mAs). And with using the electronic caliper within the scanner the following diameters were measured. The features of CT scanner are: 256 slices in one rotation with 5 mm slice thickness. Coverage of 13 cm in patient axis direction. The patient position is supine. Using CT KUB technique. Ultrasound machine is GE medical system LOQIC 5 Expert, made by Yocogama medical systems LTD-JAPAN – model 2302650, serial No. 1028924, manufactured April 2005. Position of the patient is Lie comfortably on his/her back (supine) Head may rest in a small pillow To visualize Rt. And Lt, kidneys, applying gel to the Rt and Lt upper abdomen consequently. Scanning is best performed with the patient holding the breath in. The study showed that the (age group) of patient's from 21 years to 40 years more affected than the other age group (56%). The preliminary investigations obtained from this study revealed that the patients participated in this study, men’s with being more affected than women’s in regards with renal stone disease (70%). The preliminary investigations obtained from this study revealed that the family history of the renal stone cannot cause the disease. Family history Present 16 Pt (32%), not present 34 Pt (68%). US finding of the LT affected side shows 6 Pt (12%) while the CT show 28 Pt (56%). US finding of the RT affected side shows 6 Pt (12%) while the CT show 15 Pt (30%). US finding measurement of stone size less than (5mm) in the kidney show 6 stones while the CT shows 13 stones. US finding measurement of stone size more than (5mm) in the kidney show 8 stones while the CT shows 20 stones. US finding measurement of stone size less than (5mm) in the ureter show (zero) while the CT shows 8 stones. US finding measurement of stone size more than (5mm) in the ureter show 1stone while the CT shows 10 stones. From this study we conclude that the CT more effectiveness in diagnosis of the renal stone site and size than the ultra sound. Booth U/S and spiral CT should be available in emergency department. CT is the image modality to evaluate the renal stones, as the provides a road map and excellent detail is available regarding to the anatomy, pathology and early diagnosis of urinary system so it's very import factor in the disease management both spiral CT and US were found to be excellent modalities for depicting renal stones, but because of high cost, radiation does and high workload of CT, U/S is the first line choice in diagnosis of renal calculi.