Magnetic resonance evaluation of hydronephrosis in the dog

Journal Article · Sun Jul 01 04:00:00 EDT 1984 · Radiology; (United States)

DOI:https://doi.org/10.1148/radiology.152.1.6729100· OSTI ID:6659891

Thickman, D; Kundel, H; Biery, D

The ability of magnetic resonance (MR) imaging to detect and distinguish various stages of obstruction in the canine kidney was investigated. MR images were obtained at acute, subacute, and chronic stages of experimentally produced hydronephrosis. The renal cortex was distinguished from the renal medulla in the normal dog and in the acute and subacute stages of hydronephrosis. T1 relaxation times of the renal cortex and medulla were measured in vitro in 14 normal and nine experimental animals. These values were used to compute the amount of tissue contrast between the cortex and medulla and were compared with the degree of corticomedullary differentiation seen in the image. A relationship was noted between increasing T1 values and increasing water content. Corticomedullary contrast decreased with obstruction. The variation in corticomedullary image contracts may be useful for assessing the duration of hydronephrosis.

• Research Organization: Univ. of Pennsylvania, Philadelphia
• OSTI ID: 6659891
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 152:1; ISSN RADLA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BODY
DIAGNOSIS
DISEASES
DOGS
IN VITRO
KIDNEYS
MAGNETIC RESONANCE
MAMMALS
NUCLEAR MAGNETIC RESONANCE
ORGANS
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
UROGENITAL SYSTEM DISEASES
VERTEBRATES