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Multidetector CT urography in imaging of the urinary tract in patients with hematuria.

Maher MM, Kalra MK, Rizzo S, Mueller PR, Saini S - Korean J Radiol (2004 Jan-Mar)

Bottom Line: This review article comprehensively discusses multidetector CT urography protocols and their role in imaging of the urinary tract in patients with hematuria.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

ABSTRACT
This review article comprehensively discusses multidetector CT urography protocols and their role in imaging of the urinary tract in patients with hematuria.

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Related in: MedlinePlus

Multidetector CT urography examination of a 65-year-old lady with left renal caliceal diverticulum and nodular calcification. Supine (A) and prone images (B) show change in position of this nodular calcific density (arrows) suggestive of calculus.
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Figure 3: Multidetector CT urography examination of a 65-year-old lady with left renal caliceal diverticulum and nodular calcification. Supine (A) and prone images (B) show change in position of this nodular calcific density (arrows) suggestive of calculus.

Mentions: Nearly all stones, including those containing uric acid and those located in unusual positions such as caliceal diverticulum (Fig. 3) are detectable by CT (5). An unenhanced study is highly sensitive and accurate in diagnosing obstruction secondary to ureteric calculi. It is more accurate than excretory urography in demonstrating the presence, size and location of urinary tract calculi. The diagnosis of obstructing urinary tract calculi is usually confirmed by the detection of the secondary signs of obstruction. Presence of "soft tissue rim sign," a circumferential rim of soft-tissue attenuation surrounding an abdominal or pelvic calcification, is a strong indicator that a calcification along the course of the ureter is a calculus (Fig. 4) (22, 23). Similarly, a "comet-tail sign" representing a linear or curvilinear soft-tissue structure extending from an abdominal or pelvic calcification, is an important indicator that a suspicious calcification represents a phlebolith, while its absence suggests indeterminate calcification (23, 24). Coll and colleagues have documented the relationship of spontaneous passage of ureteral calculi to stone size and location using unenhanced helical CT (25).


Multidetector CT urography in imaging of the urinary tract in patients with hematuria.

Maher MM, Kalra MK, Rizzo S, Mueller PR, Saini S - Korean J Radiol (2004 Jan-Mar)

Multidetector CT urography examination of a 65-year-old lady with left renal caliceal diverticulum and nodular calcification. Supine (A) and prone images (B) show change in position of this nodular calcific density (arrows) suggestive of calculus.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2698107&req=5

Figure 3: Multidetector CT urography examination of a 65-year-old lady with left renal caliceal diverticulum and nodular calcification. Supine (A) and prone images (B) show change in position of this nodular calcific density (arrows) suggestive of calculus.
Mentions: Nearly all stones, including those containing uric acid and those located in unusual positions such as caliceal diverticulum (Fig. 3) are detectable by CT (5). An unenhanced study is highly sensitive and accurate in diagnosing obstruction secondary to ureteric calculi. It is more accurate than excretory urography in demonstrating the presence, size and location of urinary tract calculi. The diagnosis of obstructing urinary tract calculi is usually confirmed by the detection of the secondary signs of obstruction. Presence of "soft tissue rim sign," a circumferential rim of soft-tissue attenuation surrounding an abdominal or pelvic calcification, is a strong indicator that a calcification along the course of the ureter is a calculus (Fig. 4) (22, 23). Similarly, a "comet-tail sign" representing a linear or curvilinear soft-tissue structure extending from an abdominal or pelvic calcification, is an important indicator that a suspicious calcification represents a phlebolith, while its absence suggests indeterminate calcification (23, 24). Coll and colleagues have documented the relationship of spontaneous passage of ureteral calculi to stone size and location using unenhanced helical CT (25).

Bottom Line: This review article comprehensively discusses multidetector CT urography protocols and their role in imaging of the urinary tract in patients with hematuria.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

ABSTRACT
This review article comprehensively discusses multidetector CT urography protocols and their role in imaging of the urinary tract in patients with hematuria.

Show MeSH
Related in: MedlinePlus