MR Imaging of Urinary Bladder Neoplasms

Koelbel, Gerhard; Schmiedl, Udo P.; Griebel, Juergen; Hess, Clemens Freindrich; Kueper, Klaus

doi:10.1097/00004728-198801000-00019

Cited by 28 publications

(8 citation statements)

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“…Encouraging reports [12,14,16] on stag ing of bladder tumors were published, taking advantage from its multiplan applicability. Tumors of bladder base and bladder dome could be better visualized; the supe rior soft-tissue contrast permitted the evaluation of tu mor contact to adjacent structures such as prostate and seminal vesicles [3], Staging accuracy rates of up to 85% were reported [11,12], Nevertheless, scepticism is justi fied because technical details and strengths of magnetic fields varied significantly (magnetic fields from 0.15 to 1.5 T).…”

Section: Discussionmentioning

confidence: 99%

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Gadolinium-Enhanced Magnetic Resonance Imaging in the Staging of Urinary Bladder Neoplasms

Sohn¹,

Neuerburg

Teufl

et al. 1990

Urol Int

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Magnetic resonance imaging (MRI) proved to be an important diagnostic tool in the correct staging of bladder neoplasms. The advantage of multiplane imaging and high soft-tissue contrast may be extended by the use of MRI contrast media such as the gadoliniumdiethylene-triaminepentaacetic acid complex. In 60 patients with suspected or proved bladder tumors, the results of preoperative gadolinium-enhanced MRI were correlated with the histopathologic findings. The staging accuracy of infiltrating tumors was 83% and sensitivity and specificity 86% and 83%, respectively. Three tumors could only be localized after administration of gadolinium. All active tumors demonstrated significant contrast enhancement after intravenously injected gadolinium. Small papillary tumors or carcinoma in situ remain problematic to preoperative staging procedures. The advantages of gadolinium-enhanced MRI will best be employed in the exact pretherapeutic staging of infiltrative bladder neoplasms or in restaging procedures after chemotherapy and radiotherapy.

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Section: Discussionmentioning

confidence: 99%

“…Without contrast material, bladder wall and tumor tissue may be differentiated best in T2-weighted images [14]. Since the signal/noise ratio and the resulting spatial resolution of T1-weighted images is higher, contrastenhanced T1 -weighted images made a more precise eval uation of tumor extent possible ( fig.…”

Section: Discussionmentioning

confidence: 99%

Gadolinium-Enhanced Magnetic Resonance Imaging in the Staging of Urinary Bladder Neoplasms

Sohn¹,

Neuerburg

Teufl

et al. 1990

Urol Int

View full text Add to dashboard Cite

show abstract

“…3,7,10). Nevertheless SE images show a poor contrast between tumor and bladder wall, mainly on TI-weighted images ( 10).…”

mentioning

confidence: 99%

“…3,7,10). Nevertheless SE images show a poor contrast between tumor and bladder wall, mainly on TI-weighted images ( 10). Moreover, on T2-weighted images, the chemical-shift artifact occurring at the water/fat interface (bladder/perivesical fat) in the direction of the readout gradient, represents an intrinsic limit of the method in evaluating the bladder wall (6, 1 I).…”

mentioning

confidence: 99%

MR Imaging with Stir Technique and Air Insufflation for Local Staging of Bladder Neoplasms

Bartolozzi¹,

Caramella²,

Zampa³

et al. 1992

Acta Radiol

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“…MR imaging of the bladder is usually performed with Tland T2-weighted spin-echo (SE) images, which benefit from the natural contrast of the muscular bladder wall, the urine content, and the pelvic fat on the outer vesical border (1,3,7,10). Nevertheless SE images show a poor contrast between tumor and bladder wall, mainly on Tl-weighted images (10).…”

mentioning

confidence: 99%

MR Imaging with Stir Technique and Air Insufflation for Local Staging of Bladder Neoplasms

Bartolozzi¹,

Caramella²,

Zampa³

et al. 1992

Acta Radiol

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Fifty-six patients with bladder carcinoma were studied with MR imaging for the assessment of the local stage, using the inversion recovery pulse sequence with fat suppression (STIR) with air in the bladder. With this technique images of the inner and the outer parts of the bladder wall were obtained, showing high contrast between the latter and the tumor (tumor/muscle contrast 89.9%). Four tumor stages were recognized: superficial neoplasms (Tis, Ta, and Tl), partial wall infiltrating neoplasms (T2); total wall infiltrating neoplasms (T3a, T3b), and neoplasms involving other pelvic organs (T4). MR imaging was compared with histopathologic diagnosis obtained at transurethral resection or cystectomy. True-positive diagnosis was obtained in 80.4%; false-positive in 14.3% of cases; false-negative in 5.3%. Despite the relatively high incidence of overstaged neoplasms, STIR technique combined with air in the bladder allowed a good accuracy in local staging.

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MR Imaging of Urinary Bladder Neoplasms

Cited by 28 publications

References 0 publications

Gadolinium-Enhanced Magnetic Resonance Imaging in the Staging of Urinary Bladder Neoplasms

Gadolinium-Enhanced Magnetic Resonance Imaging in the Staging of Urinary Bladder Neoplasms

MR Imaging with Stir Technique and Air Insufflation for Local Staging of Bladder Neoplasms

MR Imaging with Stir Technique and Air Insufflation for Local Staging of Bladder Neoplasms

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