title: Renal damages after extracorporeal shock wave lithotripsy evaluated by Gd-DTPA-enhanced dynamic magnetic resonance imaging.
abstract: Renal damages after extracorporeal shock wave lithotripsy (ESWL) were evaluated by magnetic resonance imaging (MRI) including Gd-DTPA-enhanced dynamic MRI in 37 patients with renal stone by spin echo methods (T1 and T2-weighted scan) and small tip angle gradient echo method (T2-weighted scan). Sixty-eight percent of the patients had changes in the MRI findings after ESWL. The frequently observed findings were perirenal fluid collection (38%), loss of corticomedullary junction (35%), and increased signal intensity of muscle and other adjacent tissue (34%). Preoperative Gd-DTPA-enhanced dynamic MRI showed low intensity band which suggests Gd-DTPA secretion from the glomerulus into the renal tubulus. In all cases the low intensity band became unclear after ESWL because of renal contusion due to ESWL. MRI, including Gd-DTPA-enhanced dynamic MRI, is considered to be a good procedure for evaluation of renal damages due to ESWL.
authors.affiliation: Department of Urology, School of Medicine, Kinki University, Osaka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Umekawa
authors.forename: K
authors.initials: K
authors.lastname: Kohri
authors.forename: T
authors.initials: T
authors.lastname: Yamate
authors.forename: N
authors.initials: N
authors.lastname: Amasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: M
authors.initials: M
authors.lastname: Takada
authors.forename: M
authors.initials: M
authors.lastname: Iguchi
authors.forename: T
authors.initials: T
authors.lastname: Kurita
mesh_terms: D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007669:Kidney Calculi / Q000628:therapy*; D007674:Kidney Diseases / Q000175:diagnosis* / Q000209:etiology*; D008096:Lithotripsy / Q000009:adverse effects*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009942:Organometallic Compounds; D004369:Pentetic Acid
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA