title: Comparison of color Doppler sonography and radionuclide imaging in different degrees of torsion in rabbit testes.
abstract: OBJECTIVE
  We compared color Doppler sonography and radionuclide imaging in an animal model of variable torsion of the testes.
  
  
  METHODS
  The testes of 19 rabbits with unilateral 0 degree (nontorsion), 180 degrees, 360 degrees, or 540 degrees torsion and contralateral nontorsion were evaluated by sonography serially over 24 hr. Color Doppler sonography and radionuclide imaging at 24 hr were compared and correlated with pathology in a subset of testes.
  
  
  RESULTS
  Nontorsion (n = 16 testes) and 540 degrees torsion (n = 7 testes) were always correctly diagnosed at 24 hr by color Doppler sonography and radionuclide imaging. Torsion at 180 degrees (n = 2) was indistinguishable from nontorsion. With 360 degrees torsion (n = 6 testes), four testes had reduced or absent flow with color Doppler sonography, whereas only one testis was abnormal with radionuclide imaging.
  
  
  CONCLUSIONS
  Nontorsion and extreme torsion of rabbit testes are well documented by radionuclide imaging and color Doppler sonography. Torsion at 360 degrees can result in variable flow alterations that are better detected by color Doppler sonography than by radionuclide imaging.
authors.affiliation: Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Frush
authors.forename: D S
authors.initials: DS
authors.lastname: Babcock
authors.forename: A G
authors.initials: AG
authors.lastname: Lewis
authors.forename: H J
authors.initials: HJ
authors.lastname: Paltiel
authors.forename: R
authors.initials: R
authors.lastname: Rupich
authors.forename: K E
authors.initials: KE
authors.lastname: Bove
authors.forename: C A
authors.initials: CA
authors.lastname: Sheldon
mesh_terms: D000818:Animals; D008297:Male; D011817:Rabbits; D011877:Radionuclide Imaging; D013086:Spermatic Cord Torsion / Q000000981:diagnostic imaging* / Q000473:pathology; D018615:Ultrasonography, Doppler, Color