Contrast-enhanced 3D MR voiding urethrography: preliminary results

Analysis of Energy Loss Mediated by an Alpha-1 Blocker in Patients with Benign Prostatic Hyperplasia Using a Virtual Urethra Processed from an Endoscopic Video Image

“…Contrast-enhanced MRI 19 or CT 20 technology may be able to potentially depict the physiologic status of the urethra during urination. While cystourethroscopy cannot document the physiologic status of urination, we were able to use a cystourethroscopic video image for reconstruction of a 3D structure of the prostatic urethra.…”

MR Imaging of Nonmalignant Penile Lesions

“…Anterior urethral strictures are most commonly investigated with retrograde urethrography and thrography, although the additional benefits of this technique are uncertain (59); there is good contrast between urine and the urethra with unenhanced T2-weighted sequences (58). There is also emerging evidence that MR imaging can provide more accurate information in cases of obliterative stricture than can combined retrograde-anterograde urethrography, particularly in complex cases of pelvic trauma, and is good for assessing the degree of prostatic displacement (60).…”

MRI of the penis

“…MR urethrography can be performed with T 2 sequences and saline or jelly [51] or T 1 gradient echo sequences around an hour after injection of intravenous gadolinium [53]. One place where MRI may be useful is after pelvic trauma, where as well as delineating the urethral lumen it may demonstrate the anatomical abnormality and degree of prostatic displacement [54]; in particular, one report has suggested that it may be more accurate than conventional urethrography at determining the length of the obliterated segment [55], but it must be stressed that obtaining good urethral distension can be technically challenging.…”